Use doc.yml to generate document site

.github/workflows/docs.yml

@@ -0,0 +1,33 @@
+name: docs
+on:
+  push:
+    branches: [master]
+    paths:
+      - 'docs-src/**'
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+      - name: Install docs-gen
+        run: cargo install docs-gen
+      - name: Build
+        run: docs-gen build docs-src docs
+      - uses: actions/configure-pages@v5
+      - uses: actions/upload-pages-artifact@v3
+        with:
+          path: docs
+      - id: deployment
+        uses: actions/deploy-pages@v4

docs-src/config.toml

@@ -1,5 +1,5 @@
 [system]
-theme = "default"
+theme = "monotone"
 langs = ["en", "ja"]
 
 [site]

docs/css/main.css

@@ -1,603 +0,0 @@
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-.nav-list li a.active {
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-.content article h1 {
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-.content article pre {
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-  background: none;
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-.content article table {
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-.content article th,
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-.content article th {
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-.search-modal {
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docs/en/cookbook/index.html

@@ -1,111 +0,0 @@
-<!DOCTYPE html>
-<html lang="en" data-base-path="&#x2F;cpp-httplib">
-<head>
-  <meta charset="utf-8">
-  <meta name="viewport" content="width=device-width, initial-scale=1">
-  <title>Cookbook - cpp-httplib</title>
-  <link rel="icon" type="image/svg+xml" href="&#x2F;cpp-httplib/favicon.svg">
-  <link rel="stylesheet" href="&#x2F;cpp-httplib/css/main.css">
-  <script>
-    (function() {
-      var t = localStorage.getItem('preferred-theme');
-      if (!t) t = window.matchMedia('(prefers-color-scheme: light)').matches ? 'light' : 'dark';
-      if (t === 'light') document.documentElement.setAttribute('data-theme', 'light');
-    })();
-  </script>
-</head>
-<body>
-  <header class="header">
-    <div class="header-inner">
-      <a href="&#x2F;cpp-httplib&#x2F;en/" class="header-title">cpp-httplib <span style="font-size:0.75em;font-weight:normal;margin-left:4px">v0.36.0</span></a>
-      <div class="header-spacer"></div>
-      <nav class="header-nav">
-        <a href="&#x2F;cpp-httplib&#x2F;en/">
-          <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M3 9l9-7 9 7v11a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2z"/><polyline points="9 22 9 12 15 12 15 22"/></svg>
-          Home
-        </a>
-        
-        
-        <a href="&#x2F;cpp-httplib&#x2F;en/tour&#x2F;">
-          <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="10"/><polygon points="16.24 7.76 14.12 14.12 7.76 16.24 9.88 9.88 16.24 7.76"/></svg>
-          Tour
-        </a>
-        
-        
-        
-        <a href="https:&#x2F;&#x2F;github.com&#x2F;yhirose&#x2F;cpp-httplib" aria-label="GitHub">
-          <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M9 19c-5 1.5-5-2.5-7-3m14 6v-3.87a3.37 3.37 0 0 0-.94-2.61c3.14-.35 6.44-1.54 6.44-7A5.44 5.44 0 0 0 20 4.77 5.07 5.07 0 0 0 19.91 1S18.73.65 16 2.48a13.38 13.38 0 0 0-7 0C6.27.65 5.09 1 5.09 1A5.07 5.07 0 0 0 5 4.77a5.44 5.44 0 0 0-1.5 3.78c0 5.42 3.3 6.61 6.44 7A3.37 3.37 0 0 0 9 18.13V22"/></svg>
-          GitHub
-        </a>
-        
-        
-      </nav>
-      <div class="header-tools">
-        <button class="search-btn" aria-label="Search (⌘K)">
-          <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="11" cy="11" r="8"/><line x1="21" y1="21" x2="16.65" y2="16.65"/></svg>
-        </button>
-        <button class="theme-toggle" aria-label="Toggle theme"></button>
-        
-        <div class="lang-selector">
-          <button class="lang-btn" aria-label="Language">
-            <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="10"/><line x1="2" y1="12" x2="22" y2="12"/><path d="M12 2a15.3 15.3 0 0 1 4 10 15.3 15.3 0 0 1-4 10 15.3 15.3 0 0 1-4-10 15.3 15.3 0 0 1 4-10z"/></svg>
-            EN
-          </button>
-          <ul class="lang-popup">
-            
-            <li><a href="#" data-lang="en">EN</a></li>
-            
-            <li><a href="#" data-lang="ja">JA</a></li>
-            
-          </ul>
-        </div>
-        
-      </div>
-      <button class="sidebar-toggle" aria-label="Menu">&#9776;</button>
-    </div>
-  </header>
-
-  
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-  <div class="layout has-sidebar">
-    
-<aside class="sidebar">
-  <nav class="sidebar-nav">
-    
-    <div class="nav-section">
-      <a href="&#x2F;cpp-httplib&#x2F;en&#x2F;cookbook&#x2F;" class="nav-section-title active">Cookbook</a>
-      
-    </div>
-    
-  </nav>
-</aside>
-<main class="content">
-  <article>
-    <h1>Cookbook</h1>
-    <p>This section is under construction.</p>
-<p>Check back soon for a collection of recipes organized by topic.</p>
-
-  </article>
-</main>
-
-  </div>
-
-  <footer class="footer">
-    © 2026 Yuji Hirose. All rights reserved.
-  </footer>
-
-  <!-- Search modal -->
-  <div class="search-overlay" id="search-overlay">
-    <div class="search-modal">
-      <div class="search-input-wrap">
-        <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="11" cy="11" r="8"/><line x1="21" y1="21" x2="16.65" y2="16.65"/></svg>
-        <input type="text" id="search-input" placeholder="Search..." autocomplete="off" spellcheck="false">
-        <kbd class="search-esc">ESC</kbd>
-      </div>
-      <ul class="search-results" id="search-results"></ul>
-    </div>
-  </div>
-
-  <script src="&#x2F;cpp-httplib/js/main.js"></script>
-</body>
-</html>

docs/en/index.html

@@ -1,110 +0,0 @@
-<!DOCTYPE html>
-<html lang="en" data-base-path="&#x2F;cpp-httplib">
-<head>
-  <meta charset="utf-8">
-  <meta name="viewport" content="width=device-width, initial-scale=1">
-  <title>cpp-httplib - cpp-httplib</title>
-  <link rel="icon" type="image/svg+xml" href="&#x2F;cpp-httplib/favicon.svg">
-  <link rel="stylesheet" href="&#x2F;cpp-httplib/css/main.css">
-  <script>
-    (function() {
-      var t = localStorage.getItem('preferred-theme');
-      if (!t) t = window.matchMedia('(prefers-color-scheme: light)').matches ? 'light' : 'dark';
-      if (t === 'light') document.documentElement.setAttribute('data-theme', 'light');
-    })();
-  </script>
-</head>
-<body>
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-    <h1>Getting Started</h1>
-    <p>All you need to get started with cpp-httplib is <code>httplib.h</code> and a C++ compiler. Let's download the file and get a Hello World server running.</p>
-<h2>Getting httplib.h</h2>
-<p>You can download it directly from GitHub. Always use the latest version.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> -LO</span><span style="color:#c0c5ce;"> https://github.com/yhirose/cpp-httplib/raw/refs/tags/latest/httplib.h
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl -LO https://github.com/yhirose/cpp-httplib/raw/refs/tags/latest/httplib.h
-</span></pre>
-</div></div>
-<p>Place the downloaded <code>httplib.h</code> in your project directory and you're good to go.</p>
-<h2>Setting Up Your Compiler</h2>
-<table><thead><tr><th>OS</th><th>Development Environment</th><th>Setup</th></tr></thead><tbody>
-<tr><td>macOS</td><td>Apple Clang</td><td>Xcode Command Line Tools (<code>xcode-select --install</code>)</td></tr>
-<tr><td>Ubuntu</td><td>clang++ or g++</td><td><code>apt install clang</code> or <code>apt install g++</code></td></tr>
-<tr><td>Windows</td><td>MSVC</td><td>Visual Studio 2022 or later (install with C++ components)</td></tr>
-</tbody></table>
-<h2>Hello World Server</h2>
-<p>Save the following code as <code>server.cpp</code>.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Server svr;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const</span><span style="color:#c0c5ce;"> httplib::Request&amp;, httplib::Response&amp; res) {
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello, World!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8080</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Server svr;
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const</span><span style="color:#323232;"> httplib::Request</span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">, httplib::Response</span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;"> res) {
-</span><span style="color:#323232;">        res.set_content(</span><span style="color:#183691;">&quot;Hello, World!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.listen(</span><span style="color:#183691;">&quot;0.0.0.0&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8080</span><span style="color:#323232;">);
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>In just a few lines, you have a server that responds to HTTP requests.</p>
-<h2>Compiling and Running</h2>
-<p>The sample code in this tutorial is written in C++17 for cleaner, more concise code. cpp-httplib itself can compile with C++11 as well.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#65737e;"># macOS
-</span><span style="color:#8fa1b3;">clang++</span><span style="color:#bf616a;"> -std</span><span style="color:#c0c5ce;">=c++17</span><span style="color:#bf616a;"> -o</span><span style="color:#c0c5ce;"> server server.cpp
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;"># Linux
-</span><span style="color:#65737e;"># `-pthread`: cpp-httplib uses threads internally
-</span><span style="color:#8fa1b3;">clang++</span><span style="color:#bf616a;"> -std</span><span style="color:#c0c5ce;">=c++17</span><span style="color:#bf616a;"> -pthread -o</span><span style="color:#c0c5ce;"> server server.cpp
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;"># Windows (Developer Command Prompt)
-</span><span style="color:#65737e;"># `/EHsc`: Enable C++ exception handling
-</span><span style="color:#8fa1b3;">cl</span><span style="color:#c0c5ce;"> /EHsc /std:c++17 server.cpp
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-style:italic;color:#969896;"># macOS
-</span><span style="color:#323232;">clang++ -std</span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;">c++17 -o server server.cpp
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;"># Linux
-</span><span style="font-style:italic;color:#969896;"># `-pthread`: cpp-httplib uses threads internally
-</span><span style="color:#323232;">clang++ -std</span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;">c++17 -pthread -o server server.cpp
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;"># Windows (Developer Command Prompt)
-</span><span style="font-style:italic;color:#969896;"># `/EHsc`: Enable C++ exception handling
-</span><span style="color:#323232;">cl /EHsc /std:c++17 server.cpp
-</span></pre>
-</div></div>
-<p>Once it compiles, run it.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#65737e;"># macOS / Linux
-</span><span style="color:#8fa1b3;">./server
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;"># Windows
-</span><span style="color:#8fa1b3;">server.exe
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-style:italic;color:#969896;"># macOS / Linux
-</span><span style="color:#323232;">./server
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;"># Windows
-</span><span style="color:#323232;">server.exe
-</span></pre>
-</div></div>
-<p>Open <code>http://localhost:8080</code> in your browser. If you see "Hello, World!", you're all set.</p>
-<p>You can also verify with <code>curl</code>.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#c0c5ce;"> http://localhost:8080/
-</span><span style="color:#65737e;"># Hello, World!
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl http://localhost:8080/
-</span><span style="font-style:italic;color:#969896;"># Hello, World!
-</span></pre>
-</div></div>
-<p>To stop the server, press <code>Ctrl+C</code> in your terminal.</p>
-<h2>Next Steps</h2>
-<p>Now you know the basics of running a server. Next, let's look at the client side. cpp-httplib also comes with HTTP client functionality.</p>
-<p><strong>Next:</strong> <a href="../02-basic-client">Basic Client</a></p>
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-    <h1>Basic Client</h1>
-    <p>cpp-httplib isn't just for servers -- it also comes with a full HTTP client. Let's use <code>httplib::Client</code> to send GET and POST requests.</p>
-<h2>Preparing a Test Server</h2>
-<p>To try out the client, you need a server that accepts requests. Save the following code, then compile and run it the same way you did in the previous chapter. We'll cover the server details in the next chapter.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Server svr;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/search</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> q = req.</span><span style="color:#8fa1b3;">get_param_value</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">q</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Query: </span><span style="color:#c0c5ce;">&quot; + q, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/post</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(req.</span><span style="color:#bf616a;">body</span><span style="color:#c0c5ce;">, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/submit</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">        std::string result;
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">for </span><span style="color:#c0c5ce;">(</span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;[key, val] : req.</span><span style="color:#bf616a;">params</span><span style="color:#c0c5ce;">) {
-</span><span style="color:#c0c5ce;">            result += key + &quot;</span><span style="color:#a3be8c;"> = </span><span style="color:#c0c5ce;">&quot; + val + &quot;</span><span style="color:#96b5b4;">\n</span><span style="color:#c0c5ce;">&quot;;
-</span><span style="color:#c0c5ce;">        }
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(result, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/upload</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> f = req.</span><span style="color:#bf616a;">form</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">get_file</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">file</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> content = f.</span><span style="color:#bf616a;">filename </span><span style="color:#c0c5ce;">+ &quot;</span><span style="color:#a3be8c;"> (</span><span style="color:#c0c5ce;">&quot; + </span><span style="color:#8fa1b3;">std::to_string</span><span style="color:#c0c5ce;">(f.</span><span style="color:#bf616a;">content</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">size</span><span style="color:#c0c5ce;">()) + &quot;</span><span style="color:#a3be8c;"> bytes)</span><span style="color:#c0c5ce;">&quot;;
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(content, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/users/:id</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> id = req.</span><span style="color:#bf616a;">path_params</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">at</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">id</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">User ID: </span><span style="color:#c0c5ce;">&quot; + id, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(</span><span style="color:#b48ead;">R</span><span style="color:#c0c5ce;">&quot;(</span><span style="color:#a3be8c;">/files/(\d+)</span><span style="color:#c0c5ce;">)&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> id = req.</span><span style="color:#bf616a;">matches</span><span style="color:#c0c5ce;">[</span><span style="color:#d08770;">1</span><span style="color:#c0c5ce;">];
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">File ID: </span><span style="color:#c0c5ce;">&quot; + </span><span style="color:#8fa1b3;">std::string</span><span style="color:#c0c5ce;">(id), &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Listening on port 8080...</span><span style="color:#c0c5ce;">&quot; &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8080</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Server svr;
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">        res.set_content(</span><span style="color:#183691;">&quot;Hello!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Get(</span><span style="color:#183691;">&quot;/search&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> q </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.get_param_value(</span><span style="color:#183691;">&quot;q&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">        res.set_content(</span><span style="color:#183691;">&quot;Query: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> q, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Post(</span><span style="color:#183691;">&quot;/post&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">        res.set_content(req.body, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Post(</span><span style="color:#183691;">&quot;/submit&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">        std::string result;
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">for </span><span style="color:#323232;">(</span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">[key, val] </span><span style="font-weight:bold;color:#a71d5d;">:</span><span style="color:#323232;"> req.params) {
-</span><span style="color:#323232;">            result </span><span style="font-weight:bold;color:#a71d5d;">+=</span><span style="color:#323232;"> key </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; = &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> val </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot;</span><span style="color:#0086b3;">\n</span><span style="color:#183691;">&quot;</span><span style="color:#323232;">;
-</span><span style="color:#323232;">        }
-</span><span style="color:#323232;">        res.set_content(result, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Post(</span><span style="color:#183691;">&quot;/upload&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> f </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.form.get_file(</span><span style="color:#183691;">&quot;file&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> content </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> f.filename </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; (&quot; </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#323232;">std::to_string(f.content.size()) </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; bytes)&quot;</span><span style="color:#323232;">;
-</span><span style="color:#323232;">        res.set_content(content, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Get(</span><span style="color:#183691;">&quot;/users/:id&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> id </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.path_params.at(</span><span style="color:#183691;">&quot;id&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">        res.set_content(</span><span style="color:#183691;">&quot;User ID: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> id, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Get(</span><span style="font-weight:bold;color:#a71d5d;">R</span><span style="color:#183691;">&quot;(/files/(\d+))&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> id </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.matches[</span><span style="color:#0086b3;">1</span><span style="color:#323232;">];
-</span><span style="color:#323232;">        res.set_content(</span><span style="color:#183691;">&quot;File ID: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#323232;">std::string(id), </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Listening on port 8080...&quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    svr.listen(</span><span style="color:#183691;">&quot;0.0.0.0&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8080</span><span style="color:#323232;">);
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<h2>GET Request</h2>
-<p>Once the server is running, open a separate terminal and give it a try. Let's start with the simplest GET request.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">http://localhost:8080</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// 200
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;    </span><span style="color:#65737e;">// Hello!
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Client cli(</span><span style="color:#183691;">&quot;http://localhost:8080&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// 200
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;    </span><span style="font-style:italic;color:#969896;">// Hello!
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>Pass the server address to the <code>httplib::Client</code> constructor, then call <code>Get()</code> to send a request. You can retrieve the status code and body from the returned <code>res</code>.</p>
-<p>Here's the equivalent <code>curl</code> command.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#c0c5ce;"> http://localhost:8080/hi
-</span><span style="color:#65737e;"># Hello!
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl http://localhost:8080/hi
-</span><span style="font-style:italic;color:#969896;"># Hello!
-</span></pre>
-</div></div>
-<h2>Checking the Response</h2>
-<p>A response contains header information in addition to the status code and body.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// Status code
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// 200
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// Body
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// Hello!
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// Headers
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#8fa1b3;">get_header_value</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Content-Type</span><span style="color:#c0c5ce;">&quot;) &lt;&lt; std::endl;  </span><span style="color:#65737e;">// text/plain
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">);
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// Status code
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// 200
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// Body
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// Hello!
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// Headers
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;get_header_value(</span><span style="color:#183691;">&quot;Content-Type&quot;</span><span style="color:#323232;">) </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// text/plain
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p><code>res-&gt;body</code> is a <code>std::string</code>, so if you want to parse a JSON response, you can pass it directly to a JSON library like <a href="https://github.com/nlohmann/json">nlohmann/json</a>.</p>
-<h2>Query Parameters</h2>
-<p>To add query parameters to a GET request, you can either write them directly in the URL or use <code>httplib::Params</code>.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/search</span><span style="color:#c0c5ce;">&quot;, httplib::Params{{&quot;</span><span style="color:#a3be8c;">q</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">cpp-httplib</span><span style="color:#c0c5ce;">&quot;}});
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// Query: cpp-httplib
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/search&quot;</span><span style="color:#323232;">, httplib::Params{{</span><span style="color:#183691;">&quot;q&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;cpp-httplib&quot;</span><span style="color:#323232;">}});
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// Query: cpp-httplib
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p><code>httplib::Params</code> automatically URL-encodes special characters for you.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">http://localhost:8080/search?q=cpp-httplib</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#65737e;"># Query: cpp-httplib
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl </span><span style="color:#183691;">&quot;http://localhost:8080/search?q=cpp-httplib&quot;
-</span><span style="font-style:italic;color:#969896;"># Query: cpp-httplib
-</span></pre>
-</div></div>
-<h2>Path Parameters</h2>
-<p>When values are embedded directly in the URL path, no special client API is needed. Just pass the path to <code>Get()</code> as-is.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/users/42</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// User ID: 42
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/users/42&quot;</span><span style="color:#323232;">);
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// User ID: 42
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#c0c5ce;"> http://localhost:8080/users/42
-</span><span style="color:#65737e;"># User ID: 42
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl http://localhost:8080/users/42
-</span><span style="font-style:italic;color:#969896;"># User ID: 42
-</span></pre>
-</div></div>
-<p>The test server also has a <code>/files/(\d+)</code> route that uses a regex to accept numeric IDs only.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/files/42</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// File ID: 42
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/files/42&quot;</span><span style="color:#323232;">);
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// File ID: 42
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#c0c5ce;"> http://localhost:8080/files/42
-</span><span style="color:#65737e;"># File ID: 42
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl http://localhost:8080/files/42
-</span><span style="font-style:italic;color:#969896;"># File ID: 42
-</span></pre>
-</div></div>
-<p>Pass a non-numeric ID like <code>/files/abc</code> and you'll get a 404. We'll cover how that works in the next chapter.</p>
-<h2>Request Headers</h2>
-<p>To add custom HTTP headers, pass an <code>httplib::Headers</code> object. This works with both <code>Get()</code> and <code>Post()</code>.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;, httplib::Headers{
-</span><span style="color:#c0c5ce;">    {&quot;</span><span style="color:#a3be8c;">Authorization</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">Bearer my-token</span><span style="color:#c0c5ce;">&quot;}
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">, httplib::Headers{
-</span><span style="color:#323232;">    {</span><span style="color:#183691;">&quot;Authorization&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;Bearer my-token&quot;</span><span style="color:#323232;">}
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> -H </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">Authorization: Bearer my-token</span><span style="color:#c0c5ce;">&quot; http://localhost:8080/hi
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl -H </span><span style="color:#183691;">&quot;Authorization: Bearer my-token&quot;</span><span style="color:#323232;"> http://localhost:8080/hi
-</span></pre>
-</div></div>
-<h2>POST Request</h2>
-<p>Let's POST some text data. Pass the body as the second argument to <code>Post()</code> and the Content-Type as the third.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/post</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">Hello, Server!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// 200
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;    </span><span style="color:#65737e;">// Hello, Server!
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Post(</span><span style="color:#183691;">&quot;/post&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;Hello, Server!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// 200
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;    </span><span style="font-style:italic;color:#969896;">// Hello, Server!
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>The test server's <code>/post</code> endpoint echoes the body back, so you get the same string you sent.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> -X</span><span style="color:#c0c5ce;"> POST</span><span style="color:#bf616a;"> -H </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">Content-Type: text/plain</span><span style="color:#c0c5ce;">&quot;</span><span style="color:#bf616a;"> -d </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">Hello, Server!</span><span style="color:#c0c5ce;">&quot; http://localhost:8080/post
-</span><span style="color:#65737e;"># Hello, Server!
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl -X POST -H </span><span style="color:#183691;">&quot;Content-Type: text/plain&quot;</span><span style="color:#323232;"> -d </span><span style="color:#183691;">&quot;Hello, Server!&quot;</span><span style="color:#323232;"> http://localhost:8080/post
-</span><span style="font-style:italic;color:#969896;"># Hello, Server!
-</span></pre>
-</div></div>
-<h2>Sending Form Data</h2>
-<p>You can send key-value pairs just like an HTML form. Use <code>httplib::Params</code> for this.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/submit</span><span style="color:#c0c5ce;">&quot;, httplib::Params{
-</span><span style="color:#c0c5ce;">    {&quot;</span><span style="color:#a3be8c;">name</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">Alice</span><span style="color:#c0c5ce;">&quot;},
-</span><span style="color:#c0c5ce;">    {&quot;</span><span style="color:#a3be8c;">age</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">30</span><span style="color:#c0c5ce;">&quot;}
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// age = 30
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// name = Alice
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Post(</span><span style="color:#183691;">&quot;/submit&quot;</span><span style="color:#323232;">, httplib::Params{
-</span><span style="color:#323232;">    {</span><span style="color:#183691;">&quot;name&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;Alice&quot;</span><span style="color:#323232;">},
-</span><span style="color:#323232;">    {</span><span style="color:#183691;">&quot;age&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;30&quot;</span><span style="color:#323232;">}
-</span><span style="color:#323232;">});
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// age = 30
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// name = Alice
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>This sends the data in <code>application/x-www-form-urlencoded</code> format.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> -X</span><span style="color:#c0c5ce;"> POST</span><span style="color:#bf616a;"> -d </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">name=Alice&amp;age=30</span><span style="color:#c0c5ce;">&quot; http://localhost:8080/submit
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl -X POST -d </span><span style="color:#183691;">&quot;name=Alice&amp;age=30&quot;</span><span style="color:#323232;"> http://localhost:8080/submit
-</span></pre>
-</div></div>
-<h2>POSTing a File</h2>
-<p>To upload a file, use <code>httplib::UploadFormDataItems</code> to send it as multipart form data.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/upload</span><span style="color:#c0c5ce;">&quot;, httplib::UploadFormDataItems{
-</span><span style="color:#c0c5ce;">    {&quot;</span><span style="color:#a3be8c;">file</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">Hello, File!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">hello.txt</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;}
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// hello.txt (12 bytes)
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Post(</span><span style="color:#183691;">&quot;/upload&quot;</span><span style="color:#323232;">, httplib::UploadFormDataItems{
-</span><span style="color:#323232;">    {</span><span style="color:#183691;">&quot;file&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;Hello, File!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;hello.txt&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">}
-</span><span style="color:#323232;">});
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// hello.txt (12 bytes)
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>Each element in <code>UploadFormDataItems</code> has four fields: <code>{name, content, filename, content_type}</code>.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> -F </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">file=Hello, File!;filename=hello.txt;type=text/plain</span><span style="color:#c0c5ce;">&quot; http://localhost:8080/upload
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl -F </span><span style="color:#183691;">&quot;file=Hello, File!;filename=hello.txt;type=text/plain&quot;</span><span style="color:#323232;"> http://localhost:8080/upload
-</span></pre>
-</div></div>
-<h2>Error Handling</h2>
-<p>Network communication can fail -- the server might not be reachable. Always check whether <code>res</code> is valid.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">http://localhost:9999</span><span style="color:#c0c5ce;">&quot;);  </span><span style="color:#65737e;">// Non-existent port
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(!res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// Connection error
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Error: </span><span style="color:#c0c5ce;">&quot; &lt;&lt; </span><span style="color:#8fa1b3;">httplib::to_string</span><span style="color:#c0c5ce;">(res.</span><span style="color:#8fa1b3;">error</span><span style="color:#c0c5ce;">()) &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// Error: Connection
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">return </span><span style="color:#d08770;">1</span><span style="color:#c0c5ce;">;
-</span><span style="color:#c0c5ce;">}
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;">// If we reach here, we have a response
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">!= </span><span style="color:#d08770;">200</span><span style="color:#c0c5ce;">) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">HTTP Error: </span><span style="color:#c0c5ce;">&quot; &lt;&lt; res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">return </span><span style="color:#d08770;">1</span><span style="color:#c0c5ce;">;
-</span><span style="color:#c0c5ce;">}
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;http://localhost:9999&quot;</span><span style="color:#323232;">);  </span><span style="font-style:italic;color:#969896;">// Non-existent port
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(</span><span style="font-weight:bold;color:#a71d5d;">!</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// Connection error
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Error: &quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#323232;">httplib::to_string(res.error()) </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// Error: Connection
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">return </span><span style="color:#0086b3;">1</span><span style="color:#323232;">;
-</span><span style="color:#323232;">}
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;">// If we reach here, we have a response
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">!= </span><span style="color:#0086b3;">200</span><span style="color:#323232;">) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;HTTP Error: &quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">return </span><span style="color:#0086b3;">1</span><span style="color:#323232;">;
-</span><span style="color:#323232;">}
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span></pre>
-</div></div>
-<p>There are two levels of errors.</p>
-<ul>
-<li><strong>Connection error</strong>: The client couldn't reach the server. <code>res</code> evaluates to false, and you can call <code>res.error()</code> to find out what went wrong.</li>
-<li><strong>HTTP error</strong>: The server returned an error status (404, 500, etc.). <code>res</code> evaluates to true, but you need to check <code>res-&gt;status</code>.</li>
-</ul>
-<h2>Next Steps</h2>
-<p>Now you know how to send requests from a client. Next, let's take a closer look at the server side. We'll dig into routing, path parameters, and more.</p>
-<p><strong>Next:</strong> <a href="../03-basic-server">Basic Server</a></p>
-
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-  <article>
-    <h1>Basic Server</h1>
-    <p>In the previous chapter, you sent requests from a client to a test server. Now let's walk through how that server actually works.</p>
-<h2>Starting the Server</h2>
-<p>Once you've registered your routes, call <code>svr.listen()</code> to start the server.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8080</span><span style="color:#c0c5ce;">);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.listen(</span><span style="color:#183691;">&quot;0.0.0.0&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8080</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<p>The first argument is the host, and the second is the port. <code>"0.0.0.0"</code> listens on all network interfaces. Use <code>"127.0.0.1"</code> if you want to accept connections from your own machine only.</p>
-<p><code>listen()</code> is a blocking call. It won't return until the server stops. The server keeps running until you press <code>Ctrl+C</code> in your terminal or call <code>svr.stop()</code> from another thread.</p>
-<h2>Routing</h2>
-<p>Routing is the heart of any server. It's how you tell cpp-httplib: when a request comes in for this URL with this HTTP method, run this code.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Server svr;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const</span><span style="color:#c0c5ce;"> httplib::Request &amp;req, httplib::Response &amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Server svr;
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const</span><span style="color:#323232;"> httplib::Request </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">req, httplib::Response </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Hello!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p><code>svr.Get()</code> registers a handler for GET requests. The first argument is the path, the second is the handler function. When a GET request arrives at <code>/hi</code>, your lambda runs.</p>
-<p>There's a method for each HTTP verb.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/path</span><span style="color:#c0c5ce;">&quot;,    handler);  </span><span style="color:#65737e;">// GET
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/path</span><span style="color:#c0c5ce;">&quot;,   handler);  </span><span style="color:#65737e;">// POST
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Put</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/path</span><span style="color:#c0c5ce;">&quot;,    handler);  </span><span style="color:#65737e;">// PUT
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Delete</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/path</span><span style="color:#c0c5ce;">&quot;, handler);  </span><span style="color:#65737e;">// DELETE
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/path&quot;</span><span style="color:#323232;">,    handler);  </span><span style="font-style:italic;color:#969896;">// GET
-</span><span style="color:#323232;">svr.Post(</span><span style="color:#183691;">&quot;/path&quot;</span><span style="color:#323232;">,   handler);  </span><span style="font-style:italic;color:#969896;">// POST
-</span><span style="color:#323232;">svr.Put(</span><span style="color:#183691;">&quot;/path&quot;</span><span style="color:#323232;">,    handler);  </span><span style="font-style:italic;color:#969896;">// PUT
-</span><span style="color:#323232;">svr.Delete(</span><span style="color:#183691;">&quot;/path&quot;</span><span style="color:#323232;">, handler);  </span><span style="font-style:italic;color:#969896;">// DELETE
-</span></pre>
-</div></div>
-<p>The handler signature is <code>(const httplib::Request &amp;req, httplib::Response &amp;res)</code>. You can use <code>auto</code> to keep it short.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Hello!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>The handler only runs when the path matches. Requests to unregistered paths automatically return 404.</p>
-<h2>The Request Object</h2>
-<p>The first parameter <code>req</code> gives you everything the client sent.</p>
-<h3>Body</h3>
-<p><code>req.body</code> holds the request body as a <code>std::string</code>.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/post</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// Echo the body back to the client
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(req.</span><span style="color:#bf616a;">body</span><span style="color:#c0c5ce;">, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Post(</span><span style="color:#183691;">&quot;/post&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// Echo the body back to the client
-</span><span style="color:#323232;">    res.set_content(req.body, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h3>Headers</h3>
-<p>Use <code>req.get_header_value()</code> to read a request header.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/check</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> auth = req.</span><span style="color:#8fa1b3;">get_header_value</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Authorization</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Auth: </span><span style="color:#c0c5ce;">&quot; + auth, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/check&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> auth </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.get_header_value(</span><span style="color:#183691;">&quot;Authorization&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Auth: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> auth, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h3>Query Parameters and Form Data</h3>
-<p><code>req.get_param_value()</code> retrieves a parameter by name. It works for both GET query parameters and POST form data.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/search</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> q = req.</span><span style="color:#8fa1b3;">get_param_value</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">q</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Query: </span><span style="color:#c0c5ce;">&quot; + q, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/search&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> q </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.get_param_value(</span><span style="color:#183691;">&quot;q&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Query: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> q, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>A request to <code>/search?q=cpp-httplib</code> gives you <code>"cpp-httplib"</code> for <code>q</code>.</p>
-<p>To loop over all parameters, use <code>req.params</code>.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/submit</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    std::string result;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">for </span><span style="color:#c0c5ce;">(</span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;[key, val] : req.</span><span style="color:#bf616a;">params</span><span style="color:#c0c5ce;">) {
-</span><span style="color:#c0c5ce;">        result += key + &quot;</span><span style="color:#a3be8c;"> = </span><span style="color:#c0c5ce;">&quot; + val + &quot;</span><span style="color:#96b5b4;">\n</span><span style="color:#c0c5ce;">&quot;;
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(result, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Post(</span><span style="color:#183691;">&quot;/submit&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    std::string result;
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">for </span><span style="color:#323232;">(</span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">[key, val] </span><span style="font-weight:bold;color:#a71d5d;">:</span><span style="color:#323232;"> req.params) {
-</span><span style="color:#323232;">        result </span><span style="font-weight:bold;color:#a71d5d;">+=</span><span style="color:#323232;"> key </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; = &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> val </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot;</span><span style="color:#0086b3;">\n</span><span style="color:#183691;">&quot;</span><span style="color:#323232;">;
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">    res.set_content(result, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h3>File Uploads</h3>
-<p>Files uploaded via multipart form data are available through <code>req.form.get_file()</code>.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/upload</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> f = req.</span><span style="color:#bf616a;">form</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">get_file</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">file</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> content = f.</span><span style="color:#bf616a;">filename </span><span style="color:#c0c5ce;">+ &quot;</span><span style="color:#a3be8c;"> (</span><span style="color:#c0c5ce;">&quot; + </span><span style="color:#8fa1b3;">std::to_string</span><span style="color:#c0c5ce;">(f.</span><span style="color:#bf616a;">content</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">size</span><span style="color:#c0c5ce;">()) + &quot;</span><span style="color:#a3be8c;"> bytes)</span><span style="color:#c0c5ce;">&quot;;
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(content, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Post(</span><span style="color:#183691;">&quot;/upload&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> f </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.form.get_file(</span><span style="color:#183691;">&quot;file&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> content </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> f.filename </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; (&quot; </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#323232;">std::to_string(f.content.size()) </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; bytes)&quot;</span><span style="color:#323232;">;
-</span><span style="color:#323232;">    res.set_content(content, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p><code>f.filename</code> gives you the filename, and <code>f.content</code> gives you the file data.</p>
-<h2>Path Parameters</h2>
-<p>Sometimes you want to capture part of the URL as a variable -- for example, the <code>42</code> in <code>/users/42</code>. Use the <code>:param</code> syntax to do that.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/users/:id</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> id = req.</span><span style="color:#bf616a;">path_params</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">at</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">id</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">User ID: </span><span style="color:#c0c5ce;">&quot; + id, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/users/:id&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> id </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.path_params.at(</span><span style="color:#183691;">&quot;id&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;User ID: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> id, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>A request to <code>/users/42</code> gives you <code>"42"</code> from <code>req.path_params.at("id")</code>. <code>/users/100</code> gives you <code>"100"</code>.</p>
-<p>You can capture multiple segments at once.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/users/:user_id/posts/:post_id</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> user_id = req.</span><span style="color:#bf616a;">path_params</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">at</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">user_id</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> post_id = req.</span><span style="color:#bf616a;">path_params</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">at</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">post_id</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">User: </span><span style="color:#c0c5ce;">&quot; + user_id + &quot;</span><span style="color:#a3be8c;">, Post: </span><span style="color:#c0c5ce;">&quot; + post_id, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/users/:user_id/posts/:post_id&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> user_id </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.path_params.at(</span><span style="color:#183691;">&quot;user_id&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> post_id </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.path_params.at(</span><span style="color:#183691;">&quot;post_id&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;User: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> user_id </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot;, Post: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> post_id, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h3>Regex Patterns</h3>
-<p>You can also write a regular expression directly in the path instead of <code>:param</code>. Capture group values are available via <code>req.matches</code>, which is a <code>std::smatch</code>.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#65737e;">// Only accept numeric IDs
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(</span><span style="color:#b48ead;">R</span><span style="color:#c0c5ce;">&quot;(</span><span style="color:#a3be8c;">/files/(\d+)</span><span style="color:#c0c5ce;">)&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> id = req.</span><span style="color:#bf616a;">matches</span><span style="color:#c0c5ce;">[</span><span style="color:#d08770;">1</span><span style="color:#c0c5ce;">];  </span><span style="color:#65737e;">// First capture group
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">File ID: </span><span style="color:#c0c5ce;">&quot; + </span><span style="color:#8fa1b3;">std::string</span><span style="color:#c0c5ce;">(id), &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-style:italic;color:#969896;">// Only accept numeric IDs
-</span><span style="color:#323232;">svr.Get(</span><span style="font-weight:bold;color:#a71d5d;">R</span><span style="color:#183691;">&quot;(/files/(\d+))&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> id </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.matches[</span><span style="color:#0086b3;">1</span><span style="color:#323232;">];  </span><span style="font-style:italic;color:#969896;">// First capture group
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;File ID: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#323232;">std::string(id), </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p><code>/files/42</code> matches, but <code>/files/abc</code> doesn't. This is handy when you want to constrain what values are accepted.</p>
-<h2>Building a Response</h2>
-<p>The second parameter <code>res</code> is how you send data back to the client.</p>
-<h3>Body and Content-Type</h3>
-<p><code>res.set_content()</code> sets the body and Content-Type. That's all you need for a 200 response.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Hello!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h3>Status Code</h3>
-<p>To return a different status code, assign to <code>res.status</code>.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/not-found</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">= </span><span style="color:#d08770;">404</span><span style="color:#c0c5ce;">;
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Not found</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/not-found&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.status </span><span style="font-weight:bold;color:#a71d5d;">= </span><span style="color:#0086b3;">404</span><span style="color:#323232;">;
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Not found&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h3>Response Headers</h3>
-<p>Add response headers with <code>res.set_header()</code>.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/with-header</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_header</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">X-Custom</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">my-value</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/with-header&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_header(</span><span style="color:#183691;">&quot;X-Custom&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;my-value&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Hello!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h2>Walking Through the Test Server</h2>
-<p>Now let's use what we've learned to read through the test server from the previous chapter.</p>
-<h3>GET /hi</h3>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Hello!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>The simplest possible handler. We don't need any information from the request, so the <code>req</code> parameter is left unnamed. It just returns <code>"Hello!"</code>.</p>
-<h3>GET /search</h3>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/search</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> q = req.</span><span style="color:#8fa1b3;">get_param_value</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">q</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Query: </span><span style="color:#c0c5ce;">&quot; + q, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/search&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> q </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.get_param_value(</span><span style="color:#183691;">&quot;q&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Query: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> q, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p><code>req.get_param_value("q")</code> pulls out the query parameter <code>q</code>. A request to <code>/search?q=cpp-httplib</code> returns <code>"Query: cpp-httplib"</code>.</p>
-<h3>POST /post</h3>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/post</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(req.</span><span style="color:#bf616a;">body</span><span style="color:#c0c5ce;">, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Post(</span><span style="color:#183691;">&quot;/post&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_content(req.body, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>An echo server. Whatever body the client sends, <code>req.body</code> holds it, and we send it straight back.</p>
-<h3>POST /submit</h3>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/submit</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    std::string result;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">for </span><span style="color:#c0c5ce;">(</span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;[key, val] : req.</span><span style="color:#bf616a;">params</span><span style="color:#c0c5ce;">) {
-</span><span style="color:#c0c5ce;">        result += key + &quot;</span><span style="color:#a3be8c;"> = </span><span style="color:#c0c5ce;">&quot; + val + &quot;</span><span style="color:#96b5b4;">\n</span><span style="color:#c0c5ce;">&quot;;
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(result, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Post(</span><span style="color:#183691;">&quot;/submit&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    std::string result;
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">for </span><span style="color:#323232;">(</span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">[key, val] </span><span style="font-weight:bold;color:#a71d5d;">:</span><span style="color:#323232;"> req.params) {
-</span><span style="color:#323232;">        result </span><span style="font-weight:bold;color:#a71d5d;">+=</span><span style="color:#323232;"> key </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; = &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> val </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot;</span><span style="color:#0086b3;">\n</span><span style="color:#183691;">&quot;</span><span style="color:#323232;">;
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">    res.set_content(result, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>Loops over the form data in <code>req.params</code> using structured bindings (<code>auto &amp;[key, val]</code>) to unpack each key-value pair.</p>
-<h3>POST /upload</h3>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/upload</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> f = req.</span><span style="color:#bf616a;">form</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">get_file</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">file</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> content = f.</span><span style="color:#bf616a;">filename </span><span style="color:#c0c5ce;">+ &quot;</span><span style="color:#a3be8c;"> (</span><span style="color:#c0c5ce;">&quot; + </span><span style="color:#8fa1b3;">std::to_string</span><span style="color:#c0c5ce;">(f.</span><span style="color:#bf616a;">content</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">size</span><span style="color:#c0c5ce;">()) + &quot;</span><span style="color:#a3be8c;"> bytes)</span><span style="color:#c0c5ce;">&quot;;
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(content, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Post(</span><span style="color:#183691;">&quot;/upload&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> f </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.form.get_file(</span><span style="color:#183691;">&quot;file&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> content </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> f.filename </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; (&quot; </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#323232;">std::to_string(f.content.size()) </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; bytes)&quot;</span><span style="color:#323232;">;
-</span><span style="color:#323232;">    res.set_content(content, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>Receives a file uploaded via multipart form data. <code>req.form.get_file("file")</code> fetches the field named <code>"file"</code>, and we respond with the filename and size.</p>
-<h3>GET /users/:id</h3>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/users/:id</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> id = req.</span><span style="color:#bf616a;">path_params</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">at</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">id</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">User ID: </span><span style="color:#c0c5ce;">&quot; + id, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/users/:id&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> id </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.path_params.at(</span><span style="color:#183691;">&quot;id&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;User ID: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> id, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p><code>:id</code> is the path parameter. <code>req.path_params.at("id")</code> retrieves its value. <code>/users/42</code> gives you <code>"42"</code>, <code>/users/alice</code> gives you <code>"alice"</code>.</p>
-<h3>GET /files/(\d+)</h3>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(</span><span style="color:#b48ead;">R</span><span style="color:#c0c5ce;">&quot;(</span><span style="color:#a3be8c;">/files/(\d+)</span><span style="color:#c0c5ce;">)&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> id = req.</span><span style="color:#bf616a;">matches</span><span style="color:#c0c5ce;">[</span><span style="color:#d08770;">1</span><span style="color:#c0c5ce;">];
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">File ID: </span><span style="color:#c0c5ce;">&quot; + </span><span style="color:#8fa1b3;">std::string</span><span style="color:#c0c5ce;">(id), &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="font-weight:bold;color:#a71d5d;">R</span><span style="color:#183691;">&quot;(/files/(\d+))&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> id </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.matches[</span><span style="color:#0086b3;">1</span><span style="color:#323232;">];
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;File ID: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#323232;">std::string(id), </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>The regex <code>(\d+)</code> matches numeric IDs only. <code>/files/42</code> hits this handler, but <code>/files/abc</code> returns 404. <code>req.matches[1]</code> retrieves the first capture group.</p>
-<h2>Next Steps</h2>
-<p>You now have the full picture of how a server works. Routing, reading requests, building responses -- that's enough to build a real API server.</p>
-<p>Next, let's look at serving static files. We'll build a server that delivers HTML and CSS.</p>
-<p><strong>Next:</strong> <a href="../04-static-file-server">Static File Server</a></p>
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-      <a href="&#x2F;cpp-httplib&#x2F;en&#x2F;tour&#x2F;" class="nav-section-title active">A Tour of cpp-httplib</a>
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-        <li><a href="&#x2F;cpp-httplib&#x2F;en&#x2F;tour&#x2F;01-getting-started&#x2F;" class="">Getting Started</a></li>
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-        <li><a href="&#x2F;cpp-httplib&#x2F;en&#x2F;tour&#x2F;02-basic-client&#x2F;" class="">Basic Client</a></li>
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-<main class="content">
-  <article>
-    <h1>Static File Server</h1>
-    <p>cpp-httplib can serve static files too — HTML, CSS, images, you name it. No complicated configuration required. One call to <code>set_mount_point()</code> is all it takes.</p>
-<h2>The basics of set_mount_point</h2>
-<p>Let's jump right in. <code>set_mount_point()</code> maps a URL path to a local directory.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Server svr;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">set_mount_point</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">./html</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Listening on port 8080...</span><span style="color:#c0c5ce;">&quot; &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8080</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Server svr;
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.set_mount_point(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;./html&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Listening on port 8080...&quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    svr.listen(</span><span style="color:#183691;">&quot;0.0.0.0&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8080</span><span style="color:#323232;">);
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>The first argument is the URL mount point. The second is the local directory path. In this example, requests to <code>/</code> are served from the <code>./html</code> directory.</p>
-<p>Let's try it out. First, create an <code>html</code> directory and add an <code>index.html</code> file.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">mkdir</span><span style="color:#c0c5ce;"> html
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">mkdir html
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">&lt;!</span><span style="color:#bf616a;">DOCTYPE</span><span style="color:#c0c5ce;"> html&gt;
-</span><span style="color:#c0c5ce;">&lt;</span><span style="color:#bf616a;">html</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">&lt;</span><span style="color:#bf616a;">head</span><span style="color:#c0c5ce;">&gt;&lt;</span><span style="color:#bf616a;">title</span><span style="color:#c0c5ce;">&gt;My Page&lt;/</span><span style="color:#bf616a;">title</span><span style="color:#c0c5ce;">&gt;&lt;/</span><span style="color:#bf616a;">head</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">&lt;</span><span style="color:#bf616a;">body</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">    &lt;</span><span style="color:#bf616a;">h1</span><span style="color:#c0c5ce;">&gt;Hello from cpp-httplib!&lt;/</span><span style="color:#bf616a;">h1</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">    &lt;</span><span style="color:#bf616a;">p</span><span style="color:#c0c5ce;">&gt;This is a static file.&lt;/</span><span style="color:#bf616a;">p</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">&lt;/</span><span style="color:#bf616a;">body</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">&lt;/</span><span style="color:#bf616a;">html</span><span style="color:#c0c5ce;">&gt;
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">&lt;!</span><span style="color:#63a35c;">DOCTYPE</span><span style="color:#323232;"> html&gt;
-</span><span style="color:#323232;">&lt;</span><span style="color:#63a35c;">html</span><span style="color:#323232;">&gt;
-</span><span style="color:#323232;">&lt;</span><span style="color:#63a35c;">head</span><span style="color:#323232;">&gt;&lt;</span><span style="color:#63a35c;">title</span><span style="color:#323232;">&gt;My Page&lt;/</span><span style="color:#63a35c;">title</span><span style="color:#323232;">&gt;&lt;/</span><span style="color:#63a35c;">head</span><span style="color:#323232;">&gt;
-</span><span style="color:#323232;">&lt;</span><span style="color:#63a35c;">body</span><span style="color:#323232;">&gt;
-</span><span style="color:#323232;">    &lt;</span><span style="color:#63a35c;">h1</span><span style="color:#323232;">&gt;Hello from cpp-httplib!&lt;/</span><span style="color:#63a35c;">h1</span><span style="color:#323232;">&gt;
-</span><span style="color:#323232;">    &lt;</span><span style="color:#63a35c;">p</span><span style="color:#323232;">&gt;This is a static file.&lt;/</span><span style="color:#63a35c;">p</span><span style="color:#323232;">&gt;
-</span><span style="color:#323232;">&lt;/</span><span style="color:#63a35c;">body</span><span style="color:#323232;">&gt;
-</span><span style="color:#323232;">&lt;/</span><span style="color:#63a35c;">html</span><span style="color:#323232;">&gt;
-</span></pre>
-</div></div>
-<p>Compile and start the server.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">g++</span><span style="color:#bf616a;"> -std</span><span style="color:#c0c5ce;">=c++17</span><span style="color:#bf616a;"> -o</span><span style="color:#c0c5ce;"> server server.cpp</span><span style="color:#bf616a;"> -pthread
-</span><span style="color:#8fa1b3;">./server
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">g++ -std</span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;">c++17 -o server server.cpp -pthread
-</span><span style="color:#323232;">./server
-</span></pre>
-</div></div>
-<p>Open <code>http://localhost:8080</code> in your browser. You should see the contents of <code>html/index.html</code>. Visiting <code>http://localhost:8080/index.html</code> returns the same page.</p>
-<p>You can also access it with the client code from the previous chapter, or with <code>curl</code>.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">http://localhost:8080</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// HTML is displayed
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;http://localhost:8080&quot;</span><span style="color:#323232;">);
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">);
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// HTML is displayed
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#c0c5ce;"> http://localhost:8080
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl http://localhost:8080
-</span></pre>
-</div></div>
-<h2>Multiple mount points</h2>
-<p>You can call <code>set_mount_point()</code> as many times as you like. Each URL path gets its own directory.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_mount_point</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">./public</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_mount_point</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/assets</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">./static/assets</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_mount_point</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/docs</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">./documentation</span><span style="color:#c0c5ce;">&quot;);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.set_mount_point(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;./public&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">svr.set_mount_point(</span><span style="color:#183691;">&quot;/assets&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;./static/assets&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">svr.set_mount_point(</span><span style="color:#183691;">&quot;/docs&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;./documentation&quot;</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<p>A request to <code>/assets/style.css</code> serves <code>./static/assets/style.css</code>. A request to <code>/docs/guide.html</code> serves <code>./documentation/guide.html</code>.</p>
-<h2>Combining with handlers</h2>
-<p>Static file serving and routing handlers — the kind you learned about in the previous chapter — work side by side.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Server svr;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;">// API endpoint
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/api/hello</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(</span><span style="color:#b48ead;">R</span><span style="color:#c0c5ce;">&quot;(</span><span style="color:#a3be8c;">{&quot;message&quot;:&quot;Hello!&quot;}</span><span style="color:#c0c5ce;">)&quot;, &quot;</span><span style="color:#a3be8c;">application/json</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;">// Static file serving
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_mount_point</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">./public</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8080</span><span style="color:#c0c5ce;">);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Server svr;
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;">// API endpoint
-</span><span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/api/hello&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_content(</span><span style="font-weight:bold;color:#a71d5d;">R</span><span style="color:#183691;">&quot;({&quot;message&quot;:&quot;Hello!&quot;})&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;application/json&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;">// Static file serving
-</span><span style="color:#323232;">svr.set_mount_point(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;./public&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">svr.listen(</span><span style="color:#183691;">&quot;0.0.0.0&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8080</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<p>Handlers take priority. The handler responds to <code>/api/hello</code>. For every other path, the server looks for a file in <code>./public</code>.</p>
-<h2>Adding response headers</h2>
-<p>Pass headers as the third argument to <code>set_mount_point()</code> and they get attached to every static file response. This is great for cache control.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_mount_point</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">./public</span><span style="color:#c0c5ce;">&quot;, {
-</span><span style="color:#c0c5ce;">    {&quot;</span><span style="color:#a3be8c;">Cache-Control</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">max-age=3600</span><span style="color:#c0c5ce;">&quot;}
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.set_mount_point(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;./public&quot;</span><span style="color:#323232;">, {
-</span><span style="color:#323232;">    {</span><span style="color:#183691;">&quot;Cache-Control&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;max-age=3600&quot;</span><span style="color:#323232;">}
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>With this in place, the browser caches served files for one hour.</p>
-<h2>A Dockerfile for your static file server</h2>
-<p>The cpp-httplib repository includes a <code>Dockerfile</code> built for static file serving. We also publish a pre-built image on Docker Hub, so you can get up and running with a single command.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">&gt; docker run</span><span style="color:#bf616a;"> -p</span><span style="color:#c0c5ce;"> 8080:80</span><span style="color:#bf616a;"> -v</span><span style="color:#c0c5ce;"> ./my-site:/html yhirose4dockerhub/cpp-httplib-server
-</span><span style="color:#8fa1b3;">Serving</span><span style="color:#c0c5ce;"> HTTP on 0.0.0.0:80
-</span><span style="color:#8fa1b3;">Mount</span><span style="color:#c0c5ce;"> point: / -&gt; ./html
-</span><span style="color:#8fa1b3;">Press</span><span style="color:#c0c5ce;"> Ctrl+C to shutdown gracefully...
-</span><span style="color:#8fa1b3;">192.168.65.1</span><span style="color:#c0c5ce;"> - - </span><span style="color:#b48ead;">[</span><span style="color:#c0c5ce;">22/Feb/2026:12:00:00 +0000</span><span style="color:#b48ead;">] </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">GET / HTTP/1.1</span><span style="color:#c0c5ce;">&quot; 200 256 &quot;</span><span style="color:#a3be8c;">-</span><span style="color:#c0c5ce;">&quot; &quot;</span><span style="color:#a3be8c;">Mozilla/5.0 ...</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#8fa1b3;">192.168.65.1</span><span style="color:#c0c5ce;"> - - </span><span style="color:#b48ead;">[</span><span style="color:#c0c5ce;">22/Feb/2026:12:00:00 +0000</span><span style="color:#b48ead;">] </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">GET /style.css HTTP/1.1</span><span style="color:#c0c5ce;">&quot; 200 1024 &quot;</span><span style="color:#a3be8c;">-</span><span style="color:#c0c5ce;">&quot; &quot;</span><span style="color:#a3be8c;">Mozilla/5.0 ...</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#8fa1b3;">192.168.65.1</span><span style="color:#c0c5ce;"> - - </span><span style="color:#b48ead;">[</span><span style="color:#c0c5ce;">22/Feb/2026:12:00:01 +0000</span><span style="color:#b48ead;">] </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">GET /favicon.ico HTTP/1.1</span><span style="color:#c0c5ce;">&quot; 404 152 &quot;</span><span style="color:#a3be8c;">-</span><span style="color:#c0c5ce;">&quot; &quot;</span><span style="color:#a3be8c;">Mozilla/5.0 ...</span><span style="color:#c0c5ce;">&quot;
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">&gt;</span><span style="color:#323232;"> docker run -p 8080:80 -v ./my-site:/html yhirose4dockerhub/cpp-httplib-server
-</span><span style="color:#323232;">Serving HTTP on 0.0.0.0:80
-</span><span style="color:#323232;">Mount point: / -</span><span style="font-weight:bold;color:#a71d5d;">&gt;</span><span style="color:#323232;"> ./html
-</span><span style="color:#323232;">Press Ctrl+C to shutdown gracefully...
-</span><span style="color:#323232;">192.168.65.1 - - </span><span style="font-weight:bold;color:#a71d5d;">[</span><span style="color:#323232;">22/Feb/2026:12:00:00 +0000</span><span style="font-weight:bold;color:#a71d5d;">] </span><span style="color:#183691;">&quot;GET / HTTP/1.1&quot;</span><span style="color:#323232;"> 200 256 </span><span style="color:#183691;">&quot;-&quot; &quot;Mozilla/5.0 ...&quot;
-</span><span style="color:#323232;">192.168.65.1 - - </span><span style="font-weight:bold;color:#a71d5d;">[</span><span style="color:#323232;">22/Feb/2026:12:00:00 +0000</span><span style="font-weight:bold;color:#a71d5d;">] </span><span style="color:#183691;">&quot;GET /style.css HTTP/1.1&quot;</span><span style="color:#323232;"> 200 1024 </span><span style="color:#183691;">&quot;-&quot; &quot;Mozilla/5.0 ...&quot;
-</span><span style="color:#323232;">192.168.65.1 - - </span><span style="font-weight:bold;color:#a71d5d;">[</span><span style="color:#323232;">22/Feb/2026:12:00:01 +0000</span><span style="font-weight:bold;color:#a71d5d;">] </span><span style="color:#183691;">&quot;GET /favicon.ico HTTP/1.1&quot;</span><span style="color:#323232;"> 404 152 </span><span style="color:#183691;">&quot;-&quot; &quot;Mozilla/5.0 ...&quot;
-</span></pre>
-</div></div>
-<p>Everything in your <code>./my-site</code> directory gets served on port 8080. The access log follows the same format as NGINX, so you can see exactly what's happening.</p>
-<h2>What's next</h2>
-<p>You can now serve static files. A web server that delivers HTML, CSS, and JavaScript — built with this little code.</p>
-<p>Next, let's encrypt your connections with HTTPS. We'll start by setting up a TLS library.</p>
-<p><strong>Next:</strong> <a href="../05-tls-setup">TLS Setup</a></p>
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-    <h1>TLS Setup</h1>
-    <p>So far we've been using plain HTTP, but in the real world, HTTPS is the norm. To use HTTPS with cpp-httplib, you need a TLS library.</p>
-<p>In this tour, we'll use OpenSSL. It's the most widely used option, and you'll find plenty of resources online.</p>
-<h2>Installing OpenSSL</h2>
-<p>Install it for your OS.</p>
-<table><thead><tr><th>OS</th><th>How to install</th></tr></thead><tbody>
-<tr><td>macOS</td><td><a href="https://brew.sh/">Homebrew</a> (<code>brew install openssl</code>)</td></tr>
-<tr><td>Ubuntu / Debian</td><td><code>sudo apt install libssl-dev</code></td></tr>
-<tr><td>Windows</td><td><a href="https://vcpkg.io/">vcpkg</a> (<code>vcpkg install openssl</code>)</td></tr>
-</tbody></table>
-<h2>Compile Options</h2>
-<p>To enable TLS, define the <code>CPPHTTPLIB_OPENSSL_SUPPORT</code> macro when compiling. You'll need a few extra options compared to the previous chapters.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#65737e;"># macOS (Homebrew)
-</span><span style="color:#8fa1b3;">clang++</span><span style="color:#bf616a;"> -std</span><span style="color:#c0c5ce;">=c++17</span><span style="color:#bf616a;"> -DCPPHTTPLIB_OPENSSL_SUPPORT </span><span style="color:#c0c5ce;">\
-</span><span style="color:#bf616a;">    -I</span><span style="color:#c0c5ce;">$</span><span style="color:#bf616a;">(</span><span style="color:#8fa1b3;">brew</span><span style="color:#bf616a;"> --prefix openssl)</span><span style="color:#c0c5ce;">/include \
-</span><span style="color:#bf616a;">    -L</span><span style="color:#c0c5ce;">$</span><span style="color:#bf616a;">(</span><span style="color:#8fa1b3;">brew</span><span style="color:#bf616a;"> --prefix openssl)</span><span style="color:#c0c5ce;">/lib \
-</span><span style="color:#bf616a;">    -lssl -lcrypto </span><span style="color:#c0c5ce;">\
-</span><span style="color:#bf616a;">    -framework</span><span style="color:#c0c5ce;"> CoreFoundation</span><span style="color:#bf616a;"> -framework</span><span style="color:#c0c5ce;"> Security \
-</span><span style="color:#bf616a;">    -o</span><span style="color:#c0c5ce;"> server server.cpp
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;"># Linux
-</span><span style="color:#8fa1b3;">clang++</span><span style="color:#bf616a;"> -std</span><span style="color:#c0c5ce;">=c++17</span><span style="color:#bf616a;"> -pthread -DCPPHTTPLIB_OPENSSL_SUPPORT </span><span style="color:#c0c5ce;">\
-</span><span style="color:#bf616a;">    -lssl -lcrypto </span><span style="color:#c0c5ce;">\
-</span><span style="color:#bf616a;">    -o</span><span style="color:#c0c5ce;"> server server.cpp
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;"># Windows (Developer Command Prompt)
-</span><span style="color:#8fa1b3;">cl</span><span style="color:#c0c5ce;"> /EHsc /std:c++17 /DCPPHTTPLIB_OPENSSL_SUPPORT server.cpp libssl.lib libcrypto.lib
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-style:italic;color:#969896;"># macOS (Homebrew)
-</span><span style="color:#323232;">clang++ -std</span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;">c++17 -DCPPHTTPLIB_OPENSSL_SUPPORT \
-</span><span style="color:#323232;">    -I$(brew --prefix openssl)/include \
-</span><span style="color:#323232;">    -L$(brew --prefix openssl)/lib \
-</span><span style="color:#323232;">    -lssl -lcrypto \
-</span><span style="color:#323232;">    -framework CoreFoundation -framework Security \
-</span><span style="color:#323232;">    -o server server.cpp
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;"># Linux
-</span><span style="color:#323232;">clang++ -std</span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;">c++17 -pthread -DCPPHTTPLIB_OPENSSL_SUPPORT \
-</span><span style="color:#323232;">    -lssl -lcrypto \
-</span><span style="color:#323232;">    -o server server.cpp
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;"># Windows (Developer Command Prompt)
-</span><span style="color:#323232;">cl /EHsc /std:c++17 /DCPPHTTPLIB_OPENSSL_SUPPORT server.cpp libssl.lib libcrypto.lib
-</span></pre>
-</div></div>
-<p>Let's look at what each option does.</p>
-<ul>
-<li><strong><code>-DCPPHTTPLIB_OPENSSL_SUPPORT</code></strong> — Defines the macro that enables TLS support</li>
-<li><strong><code>-lssl -lcrypto</code></strong> — Links the OpenSSL libraries</li>
-<li><strong><code>-I</code> / <code>-L</code></strong> (macOS only) — Points to the Homebrew OpenSSL paths</li>
-<li><strong><code>-framework CoreFoundation -framework Security</code></strong> (macOS only) — Needed to automatically load system certificates from the Keychain</li>
-</ul>
-<h2>Verifying the Setup</h2>
-<p>Let's make sure everything works. Here's a simple program that passes an HTTPS URL to <code>httplib::Client</code>.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#define </span><span style="color:#c0c5ce;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://www.google.com</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Status: </span><span style="color:#c0c5ce;">&quot; &lt;&lt; res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    } </span><span style="color:#b48ead;">else </span><span style="color:#c0c5ce;">{
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Error: </span><span style="color:#c0c5ce;">&quot; &lt;&lt; </span><span style="color:#8fa1b3;">httplib::to_string</span><span style="color:#c0c5ce;">(res.</span><span style="color:#8fa1b3;">error</span><span style="color:#c0c5ce;">()) &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#define </span><span style="color:#323232;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Client cli(</span><span style="color:#183691;">&quot;https://www.google.com&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Status: &quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    } </span><span style="font-weight:bold;color:#a71d5d;">else </span><span style="color:#323232;">{
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Error: &quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#323232;">httplib::to_string(res.error()) </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>Compile and run it. If you see <code>Status: 200</code>, your setup is complete.</p>
-<h2>Other TLS Backends</h2>
-<p>cpp-httplib also supports Mbed TLS and wolfSSL in addition to OpenSSL. You can switch between them just by changing the macro definition and linked libraries.</p>
-<table><thead><tr><th style="text-align: left">Backend</th><th style="text-align: left">Macro</th><th style="text-align: left">Libraries to link</th></tr></thead><tbody>
-<tr><td style="text-align: left">OpenSSL</td><td style="text-align: left"><code>CPPHTTPLIB_OPENSSL_SUPPORT</code></td><td style="text-align: left"><code>libssl</code>, <code>libcrypto</code></td></tr>
-<tr><td style="text-align: left">Mbed TLS</td><td style="text-align: left"><code>CPPHTTPLIB_MBEDTLS_SUPPORT</code></td><td style="text-align: left"><code>libmbedtls</code>, <code>libmbedx509</code>, <code>libmbedcrypto</code></td></tr>
-<tr><td style="text-align: left">wolfSSL</td><td style="text-align: left"><code>CPPHTTPLIB_WOLFSSL_SUPPORT</code></td><td style="text-align: left"><code>libwolfssl</code></td></tr>
-</tbody></table>
-<p>This tour assumes OpenSSL, but the API is the same regardless of which backend you choose.</p>
-<h2>Next Step</h2>
-<p>You're all set with TLS. Next, let's send a request to an HTTPS site.</p>
-<p><strong>Next:</strong> <a href="../06-https-client">HTTPS Client</a></p>
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-    <h1>HTTPS Client</h1>
-    <p>In the previous chapter, you set up OpenSSL. Now let's put it to use with an HTTPS client. You can use the same <code>httplib::Client</code> from Chapter 2. Just pass a URL with the <code>https://</code> scheme to the constructor.</p>
-<h2>GET Request</h2>
-<p>Let's try accessing a real HTTPS site.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#define </span><span style="color:#c0c5ce;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://nghttp2.org</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;           </span><span style="color:#65737e;">// 200
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">substr</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">0</span><span style="color:#c0c5ce;">, </span><span style="color:#d08770;">100</span><span style="color:#c0c5ce;">) &lt;&lt; std::endl;  </span><span style="color:#65737e;">// First 100 chars of the HTML
-</span><span style="color:#c0c5ce;">    } </span><span style="color:#b48ead;">else </span><span style="color:#c0c5ce;">{
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Error: </span><span style="color:#c0c5ce;">&quot; &lt;&lt; </span><span style="color:#8fa1b3;">httplib::to_string</span><span style="color:#c0c5ce;">(res.</span><span style="color:#8fa1b3;">error</span><span style="color:#c0c5ce;">()) &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#define </span><span style="color:#323232;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Client cli(</span><span style="color:#183691;">&quot;https://nghttp2.org&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;           </span><span style="font-style:italic;color:#969896;">// 200
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body.substr(</span><span style="color:#0086b3;">0</span><span style="color:#323232;">, </span><span style="color:#0086b3;">100</span><span style="color:#323232;">) </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// First 100 chars of the HTML
-</span><span style="color:#323232;">    } </span><span style="font-weight:bold;color:#a71d5d;">else </span><span style="color:#323232;">{
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Error: &quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#323232;">httplib::to_string(res.error()) </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>In Chapter 2, you wrote <code>httplib::Client cli("http://localhost:8080")</code>. All you need to change is the scheme to <code>https://</code>. Every API you learned in Chapter 2 -- <code>Get()</code>, <code>Post()</code>, and so on -- works exactly the same way.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#c0c5ce;"> https://nghttp2.org/
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl https://nghttp2.org/
-</span></pre>
-</div></div>
-<h2>Specifying a Port</h2>
-<p>The default port for HTTPS is 443. If you need a different port, include it in the URL.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://localhost:8443</span><span style="color:#c0c5ce;">&quot;);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://localhost:8443&quot;</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<h2>CA Certificate Verification</h2>
-<p>When connecting over HTTPS, <code>httplib::Client</code> verifies the server certificate by default. It only connects to servers whose certificate was issued by a trusted CA (Certificate Authority).</p>
-<p>CA certificates are loaded automatically from the Keychain on macOS, the system CA certificate store on Linux, and the Windows certificate store on Windows. In most cases, no extra configuration is needed.</p>
-<h3>Specifying a CA Certificate File</h3>
-<p>On some environments, the system CA certificates may not be found. In that case, use <code>set_ca_cert_path()</code> to specify the path directly.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://nghttp2.org</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_ca_cert_path</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/etc/ssl/certs/ca-certificates.crt</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://nghttp2.org&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_ca_cert_path(</span><span style="color:#183691;">&quot;/etc/ssl/certs/ca-certificates.crt&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">);
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> --cacert</span><span style="color:#c0c5ce;"> /etc/ssl/certs/ca-certificates.crt https://nghttp2.org/
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl --cacert /etc/ssl/certs/ca-certificates.crt https://nghttp2.org/
-</span></pre>
-</div></div>
-<h3>Disabling Certificate Verification</h3>
-<p>During development, you might want to connect to a server with a self-signed certificate. You can disable verification for that.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://localhost:8443</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">enable_server_certificate_verification</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">false</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://localhost:8443&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.enable_server_certificate_verification(</span><span style="color:#0086b3;">false</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">);
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> -k</span><span style="color:#c0c5ce;"> https://localhost:8443/
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl -k https://localhost:8443/
-</span></pre>
-</div></div>
-<p>Never disable this in production. It opens you up to man-in-the-middle attacks.</p>
-<h2>Following Redirects</h2>
-<p>When accessing HTTPS sites, you'll often encounter redirects. For example, <code>http://</code> to <code>https://</code>, or a bare domain to <code>www</code>.</p>
-<p>By default, redirects are not followed. You can check the redirect target in the <code>Location</code> header.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://nghttp2.org</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/httpbin/redirect/3</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// 302
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#8fa1b3;">get_header_value</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Location</span><span style="color:#c0c5ce;">&quot;) &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://nghttp2.org&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/httpbin/redirect/3&quot;</span><span style="color:#323232;">);
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// 302
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;get_header_value(</span><span style="color:#183691;">&quot;Location&quot;</span><span style="color:#323232;">) </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#c0c5ce;"> https://nghttp2.org/httpbin/redirect/3
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl https://nghttp2.org/httpbin/redirect/3
-</span></pre>
-</div></div>
-<p>Call <code>set_follow_location(true)</code> to automatically follow redirects and get the final response.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://nghttp2.org</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_follow_location</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">true</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/httpbin/redirect/3</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// 200 (the final response)
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://nghttp2.org&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_follow_location(</span><span style="color:#0086b3;">true</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/httpbin/redirect/3&quot;</span><span style="color:#323232;">);
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// 200 (the final response)
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> -L</span><span style="color:#c0c5ce;"> https://nghttp2.org/httpbin/redirect/3
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl -L https://nghttp2.org/httpbin/redirect/3
-</span></pre>
-</div></div>
-<h2>Next Steps</h2>
-<p>Now you know how to use the HTTPS client. Next, let's set up your own HTTPS server. We'll start with creating a self-signed certificate.</p>
-<p><strong>Next:</strong> <a href="../07-https-server">HTTPS Server</a></p>
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-    <h1>HTTPS Server</h1>
-    <p>In the previous chapter, you used an HTTPS client. Now let's set up your own HTTPS server. Just swap <code>httplib::Server</code> from Chapter 3 with <code>httplib::SSLServer</code>.</p>
-<p>A TLS server needs a server certificate and a private key, though. Let's get those ready first.</p>
-<h2>Creating a Self-Signed Certificate</h2>
-<p>For development and testing, a self-signed certificate works just fine. You can generate one quickly with an OpenSSL command.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">openssl</span><span style="color:#c0c5ce;"> req</span><span style="color:#bf616a;"> -x509 -noenc -keyout</span><span style="color:#c0c5ce;"> key.pem</span><span style="color:#bf616a;"> -out</span><span style="color:#c0c5ce;"> cert.pem</span><span style="color:#bf616a;"> -subj</span><span style="color:#c0c5ce;"> /CN=localhost
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">openssl req -x509 -noenc -keyout key.pem -out cert.pem -subj /CN=localhost
-</span></pre>
-</div></div>
-<p>This creates two files:</p>
-<ul>
-<li><strong><code>cert.pem</code></strong> — Server certificate</li>
-<li><strong><code>key.pem</code></strong> — Private key</li>
-</ul>
-<h2>A Minimal HTTPS Server</h2>
-<p>Once you have your certificate, let's write the server.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#define </span><span style="color:#c0c5ce;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::SSLServer </span><span style="color:#8fa1b3;">svr</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">cert.pem</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">key.pem</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello, HTTPS!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Listening on https://localhost:8443</span><span style="color:#c0c5ce;">&quot; &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8443</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#define </span><span style="color:#323232;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::SSLServer svr(</span><span style="color:#183691;">&quot;cert.pem&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;key.pem&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">        res.set_content(</span><span style="color:#183691;">&quot;Hello, HTTPS!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Listening on https://localhost:8443&quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    svr.listen(</span><span style="color:#183691;">&quot;0.0.0.0&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8443</span><span style="color:#323232;">);
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>Just pass the certificate and private key paths to the <code>httplib::SSLServer</code> constructor. The routing API is exactly the same as <code>httplib::Server</code> from Chapter 3.</p>
-<p>Compile and start it up.</p>
-<h2>Testing It Out</h2>
-<p>With the server running, try accessing it with <code>curl</code>. Since we're using a self-signed certificate, add the <code>-k</code> option to skip certificate verification.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> -k</span><span style="color:#c0c5ce;"> https://localhost:8443/
-</span><span style="color:#65737e;"># Hello, HTTPS!
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl -k https://localhost:8443/
-</span><span style="font-style:italic;color:#969896;"># Hello, HTTPS!
-</span></pre>
-</div></div>
-<p>If you open <code>https://localhost:8443</code> in a browser, you'll see a "This connection is not secure" warning. That's expected with a self-signed certificate. Just proceed past it.</p>
-<h2>Connecting from a Client</h2>
-<p>Let's connect using <code>httplib::Client</code> from the previous chapter. There are two ways to connect to a server with a self-signed certificate.</p>
-<h3>Option 1: Disable Certificate Verification</h3>
-<p>This is the quick and easy approach for development.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#define </span><span style="color:#c0c5ce;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://localhost:8443</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    cli.</span><span style="color:#8fa1b3;">enable_server_certificate_verification</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">false</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// Hello, HTTPS!
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#define </span><span style="color:#323232;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Client cli(</span><span style="color:#183691;">&quot;https://localhost:8443&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    cli.enable_server_certificate_verification(</span><span style="color:#0086b3;">false</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// Hello, HTTPS!
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<h3>Option 2: Specify the Self-Signed Certificate as a CA Certificate</h3>
-<p>This is the safer approach. You tell the client to trust <code>cert.pem</code> as a CA certificate.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#define </span><span style="color:#c0c5ce;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://localhost:8443</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    cli.</span><span style="color:#8fa1b3;">set_ca_cert_path</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">cert.pem</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// Hello, HTTPS!
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#define </span><span style="color:#323232;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Client cli(</span><span style="color:#183691;">&quot;https://localhost:8443&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    cli.set_ca_cert_path(</span><span style="color:#183691;">&quot;cert.pem&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// Hello, HTTPS!
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>This way, only connections to the server with that specific certificate are allowed, preventing impersonation. Use this approach whenever possible, even in test environments.</p>
-<h2>Comparing Server and SSLServer</h2>
-<p>The <code>httplib::Server</code> API you learned in Chapter 3 works exactly the same with <code>httplib::SSLServer</code>. The only difference is the constructor.</p>
-<table><thead><tr><th></th><th><code>httplib::Server</code></th><th><code>httplib::SSLServer</code></th></tr></thead><tbody>
-<tr><td>Constructor</td><td>No arguments</td><td>Certificate and private key paths</td></tr>
-<tr><td>Protocol</td><td>HTTP</td><td>HTTPS</td></tr>
-<tr><td>Port (convention)</td><td>8080</td><td>8443</td></tr>
-<tr><td>Routing</td><td>Same</td><td>Same</td></tr>
-</tbody></table>
-<p>To switch an HTTP server to HTTPS, just change the constructor.</p>
-<h2>Next Steps</h2>
-<p>Your HTTPS server is up and running. You now have the basics of both HTTP/HTTPS clients and servers covered.</p>
-<p>Next, let's look at the WebSocket support that was recently added to cpp-httplib.</p>
-<p><strong>Next:</strong> <a href="../08-websocket">WebSocket</a></p>
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-    <h1>WebSocket</h1>
-    <p>cpp-httplib supports WebSocket as well. Unlike HTTP request/response, WebSocket lets the server and client exchange messages in both directions. It's great for chat apps and real-time notifications.</p>
-<p>Let's build an echo server and client right away.</p>
-<h2>Echo Server</h2>
-<p>Here's an echo server that sends back whatever message it receives.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Server svr;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">WebSocket</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/ws</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const</span><span style="color:#c0c5ce;"> httplib::Request &amp;, httplib::ws::WebSocket &amp;ws) {
-</span><span style="color:#c0c5ce;">        std::string msg;
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">while </span><span style="color:#c0c5ce;">(ws.</span><span style="color:#8fa1b3;">read</span><span style="color:#c0c5ce;">(msg)) {
-</span><span style="color:#c0c5ce;">            ws.</span><span style="color:#8fa1b3;">send</span><span style="color:#c0c5ce;">(msg);  </span><span style="color:#65737e;">// Send back the received message as-is
-</span><span style="color:#c0c5ce;">        }
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Listening on port 8080...</span><span style="color:#c0c5ce;">&quot; &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8080</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Server svr;
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.WebSocket(</span><span style="color:#183691;">&quot;/ws&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const</span><span style="color:#323232;"> httplib::Request </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">, httplib::ws::WebSocket </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">ws) {
-</span><span style="color:#323232;">        std::string msg;
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">while </span><span style="color:#323232;">(ws.read(msg)) {
-</span><span style="color:#323232;">            ws.send(msg);  </span><span style="font-style:italic;color:#969896;">// Send back the received message as-is
-</span><span style="color:#323232;">        }
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Listening on port 8080...&quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    svr.listen(</span><span style="color:#183691;">&quot;0.0.0.0&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8080</span><span style="color:#323232;">);
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>You register a WebSocket handler with <code>svr.WebSocket()</code>. It works just like <code>svr.Get()</code> and <code>svr.Post()</code> from Chapter 3.</p>
-<p>Inside the handler, <code>ws.read(msg)</code> waits for a message. When the connection closes, <code>read()</code> returns <code>false</code>, so the loop exits. <code>ws.send(msg)</code> sends a message back.</p>
-<h2>Connecting from a Client</h2>
-<p>Let's connect to the server using <code>httplib::ws::WebSocketClient</code>.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::ws::WebSocketClient </span><span style="color:#8fa1b3;">client</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">ws://localhost:8080/ws</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(!client.</span><span style="color:#8fa1b3;">connect</span><span style="color:#c0c5ce;">()) {
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Connection failed</span><span style="color:#c0c5ce;">&quot; &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">return </span><span style="color:#d08770;">1</span><span style="color:#c0c5ce;">;
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// Send a message
-</span><span style="color:#c0c5ce;">    client.</span><span style="color:#8fa1b3;">send</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello, WebSocket!</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// Receive a response from the server
-</span><span style="color:#c0c5ce;">    std::string msg;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(client.</span><span style="color:#8fa1b3;">read</span><span style="color:#c0c5ce;">(msg)) {
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; msg &lt;&lt; std::endl;  </span><span style="color:#65737e;">// Hello, WebSocket!
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    client.</span><span style="color:#8fa1b3;">close</span><span style="color:#c0c5ce;">();
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::ws::WebSocketClient client(</span><span style="color:#183691;">&quot;ws://localhost:8080/ws&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(</span><span style="font-weight:bold;color:#a71d5d;">!</span><span style="color:#323232;">client.connect()) {
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Connection failed&quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">return </span><span style="color:#0086b3;">1</span><span style="color:#323232;">;
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// Send a message
-</span><span style="color:#323232;">    client.send(</span><span style="color:#183691;">&quot;Hello, WebSocket!&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// Receive a response from the server
-</span><span style="color:#323232;">    std::string msg;
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(client.read(msg)) {
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> msg </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// Hello, WebSocket!
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    client.close();
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>Pass a URL in <code>ws://host:port/path</code> format to the constructor. Call <code>connect()</code> to start the connection, then use <code>send()</code> and <code>read()</code> to exchange messages.</p>
-<h2>Text and Binary</h2>
-<p>WebSocket has two types of messages: text and binary. You can tell them apart by the return value of <code>read()</code>.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">WebSocket</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/ws</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const</span><span style="color:#c0c5ce;"> httplib::Request &amp;, httplib::ws::WebSocket &amp;ws) {
-</span><span style="color:#c0c5ce;">    std::string msg;
-</span><span style="color:#c0c5ce;">    httplib::ws::ReadResult ret;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">while </span><span style="color:#c0c5ce;">((ret = ws.</span><span style="color:#8fa1b3;">read</span><span style="color:#c0c5ce;">(msg))) {
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(ret == httplib::ws::Binary) {
-</span><span style="color:#c0c5ce;">            ws.</span><span style="color:#8fa1b3;">send</span><span style="color:#c0c5ce;">(msg.</span><span style="color:#8fa1b3;">data</span><span style="color:#c0c5ce;">(), msg.</span><span style="color:#8fa1b3;">size</span><span style="color:#c0c5ce;">());  </span><span style="color:#65737e;">// Send as binary
-</span><span style="color:#c0c5ce;">        } </span><span style="color:#b48ead;">else </span><span style="color:#c0c5ce;">{
-</span><span style="color:#c0c5ce;">            ws.</span><span style="color:#8fa1b3;">send</span><span style="color:#c0c5ce;">(msg);  </span><span style="color:#65737e;">// Send as text
-</span><span style="color:#c0c5ce;">        }
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.WebSocket(</span><span style="color:#183691;">&quot;/ws&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const</span><span style="color:#323232;"> httplib::Request </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">, httplib::ws::WebSocket </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">ws) {
-</span><span style="color:#323232;">    std::string msg;
-</span><span style="color:#323232;">    httplib::ws::ReadResult ret;
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">while </span><span style="color:#323232;">((ret </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> ws.read(msg))) {
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(ret </span><span style="font-weight:bold;color:#a71d5d;">==</span><span style="color:#323232;"> httplib::ws::Binary) {
-</span><span style="color:#323232;">            ws.send(msg.data(), msg.size());  </span><span style="font-style:italic;color:#969896;">// Send as binary
-</span><span style="color:#323232;">        } </span><span style="font-weight:bold;color:#a71d5d;">else </span><span style="color:#323232;">{
-</span><span style="color:#323232;">            ws.send(msg);  </span><span style="font-style:italic;color:#969896;">// Send as text
-</span><span style="color:#323232;">        }
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<ul>
-<li><code>ws.send(const std::string &amp;)</code> — sends as a text message</li>
-<li><code>ws.send(const char *, size_t)</code> — sends as a binary message</li>
-</ul>
-<p>The client-side API is the same.</p>
-<h2>Accessing Request Information</h2>
-<p>You can read HTTP request information from the handshake through the first argument <code>req</code> in the handler. This is handy for checking authentication tokens.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">WebSocket</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/ws</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const</span><span style="color:#c0c5ce;"> httplib::Request &amp;req, httplib::ws::WebSocket &amp;ws) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> token = req.</span><span style="color:#8fa1b3;">get_header_value</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Authorization</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(token.</span><span style="color:#8fa1b3;">empty</span><span style="color:#c0c5ce;">()) {
-</span><span style="color:#c0c5ce;">        ws.</span><span style="color:#8fa1b3;">close</span><span style="color:#c0c5ce;">(httplib::ws::CloseStatus::PolicyViolation, &quot;</span><span style="color:#a3be8c;">unauthorized</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">return</span><span style="color:#c0c5ce;">;
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    std::string msg;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">while </span><span style="color:#c0c5ce;">(ws.</span><span style="color:#8fa1b3;">read</span><span style="color:#c0c5ce;">(msg)) {
-</span><span style="color:#c0c5ce;">        ws.</span><span style="color:#8fa1b3;">send</span><span style="color:#c0c5ce;">(msg);
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.WebSocket(</span><span style="color:#183691;">&quot;/ws&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const</span><span style="color:#323232;"> httplib::Request </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">req, httplib::ws::WebSocket </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">ws) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> token </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.get_header_value(</span><span style="color:#183691;">&quot;Authorization&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(token.empty()) {
-</span><span style="color:#323232;">        ws.close(httplib::ws::CloseStatus::PolicyViolation, </span><span style="color:#183691;">&quot;unauthorized&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">return</span><span style="color:#323232;">;
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    std::string msg;
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">while </span><span style="color:#323232;">(ws.read(msg)) {
-</span><span style="color:#323232;">        ws.send(msg);
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h2>Using WSS</h2>
-<p>WebSocket over HTTPS (WSS) is also supported. On the server side, just register a WebSocket handler on <code>httplib::SSLServer</code>.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::SSLServer </span><span style="color:#8fa1b3;">svr</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">cert.pem</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">key.pem</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">WebSocket</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/ws</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const</span><span style="color:#c0c5ce;"> httplib::Request &amp;, httplib::ws::WebSocket &amp;ws) {
-</span><span style="color:#c0c5ce;">    std::string msg;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">while </span><span style="color:#c0c5ce;">(ws.</span><span style="color:#8fa1b3;">read</span><span style="color:#c0c5ce;">(msg)) {
-</span><span style="color:#c0c5ce;">        ws.</span><span style="color:#8fa1b3;">send</span><span style="color:#c0c5ce;">(msg);
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8443</span><span style="color:#c0c5ce;">);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::SSLServer </span><span style="font-weight:bold;color:#795da3;">svr</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;cert.pem&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;key.pem&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">svr.WebSocket(</span><span style="color:#183691;">&quot;/ws&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const</span><span style="color:#323232;"> httplib::Request </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">, httplib::ws::WebSocket </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">ws) {
-</span><span style="color:#323232;">    std::string msg;
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">while </span><span style="color:#323232;">(ws.read(msg)) {
-</span><span style="color:#323232;">        ws.send(msg);
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">});
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">svr.listen(</span><span style="color:#183691;">&quot;0.0.0.0&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8443</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<p>On the client side, use the <code>wss://</code> scheme.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::ws::WebSocketClient </span><span style="color:#8fa1b3;">client</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">wss://localhost:8443/ws</span><span style="color:#c0c5ce;">&quot;);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::ws::WebSocketClient </span><span style="font-weight:bold;color:#795da3;">client</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;wss://localhost:8443/ws&quot;</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<h2>Next Steps</h2>
-<p>Now you know the basics of WebSocket. This wraps up the Tour.</p>
-<p>The next page gives you a summary of features we didn't cover in the Tour.</p>
-<p><strong>Next:</strong> <a href="../09-whats-next">What's Next</a></p>
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-      <a href="&#x2F;cpp-httplib&#x2F;en&#x2F;tour&#x2F;" class="nav-section-title active">A Tour of cpp-httplib</a>
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-        <li><a href="&#x2F;cpp-httplib&#x2F;en&#x2F;tour&#x2F;01-getting-started&#x2F;" class="">Getting Started</a></li>
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-        <li><a href="&#x2F;cpp-httplib&#x2F;en&#x2F;tour&#x2F;02-basic-client&#x2F;" class="">Basic Client</a></li>
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-<main class="content">
-  <article>
-    <h1>What&#x27;s Next</h1>
-    <p>Great job finishing the Tour! You now have a solid grasp of the cpp-httplib basics. But there's a lot more to explore. Here's a quick overview of features we didn't cover in the Tour, organized by category.</p>
-<h2>Streaming API</h2>
-<p>When you're working with LLM streaming responses or downloading large files, you don't want to load the entire response into memory. Use <code>stream::Get()</code> to process data chunk by chunk.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">http://localhost:11434</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> result = </span><span style="color:#8fa1b3;">httplib::stream::Get</span><span style="color:#c0c5ce;">(cli, &quot;</span><span style="color:#a3be8c;">/api/generate</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(result) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">while </span><span style="color:#c0c5ce;">(result.</span><span style="color:#8fa1b3;">next</span><span style="color:#c0c5ce;">()) {
-</span><span style="color:#c0c5ce;">        std::cout.</span><span style="color:#8fa1b3;">write</span><span style="color:#c0c5ce;">(result.</span><span style="color:#8fa1b3;">data</span><span style="color:#c0c5ce;">(), result.</span><span style="color:#8fa1b3;">size</span><span style="color:#c0c5ce;">());
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;http://localhost:11434&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> result </span><span style="font-weight:bold;color:#a71d5d;">= </span><span style="color:#323232;">httplib::stream::Get(cli, </span><span style="color:#183691;">&quot;/api/generate&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(result) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">while </span><span style="color:#323232;">(result.next()) {
-</span><span style="color:#323232;">        std::cout.write(result.data(), result.size());
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>You can also pass a <code>content_receiver</code> callback to <code>Get()</code>. This approach works with Keep-Alive.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">http://localhost:8080</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/stream</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const char </span><span style="color:#c0c5ce;">*data, size_t len) {
-</span><span style="color:#c0c5ce;">    std::cout.</span><span style="color:#8fa1b3;">write</span><span style="color:#c0c5ce;">(data, len);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">return </span><span style="color:#d08770;">true</span><span style="color:#c0c5ce;">;
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;http://localhost:8080&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">cli.Get(</span><span style="color:#183691;">&quot;/stream&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const char *</span><span style="color:#323232;">data, </span><span style="color:#0086b3;">size_t</span><span style="color:#323232;"> len) {
-</span><span style="color:#323232;">    std::cout.write(data, len);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">return </span><span style="color:#0086b3;">true</span><span style="color:#323232;">;
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>On the server side, you have <code>set_content_provider()</code> and <code>set_chunked_content_provider()</code>. Use the former when you know the size, and the latter when you don't.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#65737e;">// With known size (sets Content-Length)
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/file</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> size = </span><span style="color:#8fa1b3;">get_file_size</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">large.bin</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content_provider</span><span style="color:#c0c5ce;">(size, &quot;</span><span style="color:#a3be8c;">application/octet-stream</span><span style="color:#c0c5ce;">&quot;,
-</span><span style="color:#c0c5ce;">        [](size_t offset, size_t length, httplib::DataSink &amp;sink) {
-</span><span style="color:#c0c5ce;">            </span><span style="color:#65737e;">// Send &#39;length&#39; bytes starting from &#39;offset&#39;
-</span><span style="color:#c0c5ce;">            </span><span style="color:#b48ead;">return </span><span style="color:#d08770;">true</span><span style="color:#c0c5ce;">;
-</span><span style="color:#c0c5ce;">        });
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;">// Unknown size (Chunked Transfer Encoding)
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/stream</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_chunked_content_provider</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;,
-</span><span style="color:#c0c5ce;">        [](size_t offset, httplib::DataSink &amp;sink) {
-</span><span style="color:#c0c5ce;">            sink.</span><span style="color:#8fa1b3;">write</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">chunk</span><span style="color:#96b5b4;">\n</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">6</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">            </span><span style="color:#b48ead;">return </span><span style="color:#d08770;">true</span><span style="color:#c0c5ce;">;  </span><span style="color:#65737e;">// Return false to finish
-</span><span style="color:#c0c5ce;">        });
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-style:italic;color:#969896;">// With known size (sets Content-Length)
-</span><span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/file&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> size </span><span style="font-weight:bold;color:#a71d5d;">= </span><span style="color:#323232;">get_file_size(</span><span style="color:#183691;">&quot;large.bin&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    res.set_content_provider(size, </span><span style="color:#183691;">&quot;application/octet-stream&quot;</span><span style="color:#323232;">,
-</span><span style="color:#323232;">        [](</span><span style="color:#0086b3;">size_t</span><span style="color:#323232;"> offset, </span><span style="color:#0086b3;">size_t</span><span style="color:#323232;"> length, httplib::DataSink </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">sink) {
-</span><span style="color:#323232;">            </span><span style="font-style:italic;color:#969896;">// Send &#39;length&#39; bytes starting from &#39;offset&#39;
-</span><span style="color:#323232;">            </span><span style="font-weight:bold;color:#a71d5d;">return </span><span style="color:#0086b3;">true</span><span style="color:#323232;">;
-</span><span style="color:#323232;">        });
-</span><span style="color:#323232;">});
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;">// Unknown size (Chunked Transfer Encoding)
-</span><span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/stream&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_chunked_content_provider(</span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">,
-</span><span style="color:#323232;">        [](</span><span style="color:#0086b3;">size_t</span><span style="color:#323232;"> offset, httplib::DataSink </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">sink) {
-</span><span style="color:#323232;">            sink.write(</span><span style="color:#183691;">&quot;chunk</span><span style="color:#0086b3;">\n</span><span style="color:#183691;">&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">6</span><span style="color:#323232;">);
-</span><span style="color:#323232;">            </span><span style="font-weight:bold;color:#a71d5d;">return </span><span style="color:#0086b3;">true</span><span style="color:#323232;">;  </span><span style="font-style:italic;color:#969896;">// Return false to finish
-</span><span style="color:#323232;">        });
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>For uploading large files, <code>make_file_provider()</code> comes in handy. It streams the file instead of loading it all into memory.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">http://localhost:8080</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/upload</span><span style="color:#c0c5ce;">&quot;, {}, {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#8fa1b3;">httplib::make_file_provider</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">file</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">/path/to/large-file.zip</span><span style="color:#c0c5ce;">&quot;)
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;http://localhost:8080&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Post(</span><span style="color:#183691;">&quot;/upload&quot;</span><span style="color:#323232;">, {}, {
-</span><span style="color:#323232;">    httplib::make_file_provider(</span><span style="color:#183691;">&quot;file&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;/path/to/large-file.zip&quot;</span><span style="color:#323232;">)
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h2>Server-Sent Events (SSE)</h2>
-<p>We provide an SSE client as well. It supports automatic reconnection and resuming via <code>Last-Event-ID</code>.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">http://localhost:8080</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">httplib::sse::SSEClient </span><span style="color:#8fa1b3;">sse</span><span style="color:#c0c5ce;">(</span><span style="color:#bf616a;">cli</span><span style="color:#c0c5ce;">, &quot;</span><span style="color:#a3be8c;">/events</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">sse.</span><span style="color:#8fa1b3;">on_message</span><span style="color:#c0c5ce;">([](</span><span style="color:#b48ead;">const</span><span style="color:#c0c5ce;"> httplib::sse::SSEMessage &amp;msg) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; msg.</span><span style="color:#bf616a;">event </span><span style="color:#c0c5ce;">&lt;&lt; &quot;</span><span style="color:#a3be8c;">: </span><span style="color:#c0c5ce;">&quot; &lt;&lt; msg.</span><span style="color:#bf616a;">data </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">sse.</span><span style="color:#8fa1b3;">start</span><span style="color:#c0c5ce;">();  </span><span style="color:#65737e;">// Blocking, with auto-reconnection
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;http://localhost:8080&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">httplib::sse::SSEClient </span><span style="font-weight:bold;color:#795da3;">sse</span><span style="color:#323232;">(cli, </span><span style="color:#183691;">&quot;/events&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">sse.on_message([](</span><span style="font-weight:bold;color:#a71d5d;">const</span><span style="color:#323232;"> httplib::sse::SSEMessage </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">msg) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> msg.event </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;: &quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> msg.data </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">});
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">sse.start();  </span><span style="font-style:italic;color:#969896;">// Blocking, with auto-reconnection
-</span></pre>
-</div></div>
-<p>You can also set separate handlers for each event type.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">sse.</span><span style="color:#8fa1b3;">on_event</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">update</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const</span><span style="color:#c0c5ce;"> httplib::sse::SSEMessage &amp;msg) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// Only handles &quot;update&quot; events
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">sse.on_event(</span><span style="color:#183691;">&quot;update&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const</span><span style="color:#323232;"> httplib::sse::SSEMessage </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">msg) {
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// Only handles &quot;update&quot; events
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h2>Authentication</h2>
-<p>The client has helpers for Basic auth, Bearer Token auth, and Digest auth.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://api.example.com</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_basic_auth</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">user</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">password</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_bearer_token_auth</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">my-token</span><span style="color:#c0c5ce;">&quot;);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://api.example.com&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_basic_auth(</span><span style="color:#183691;">&quot;user&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;password&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_bearer_token_auth(</span><span style="color:#183691;">&quot;my-token&quot;</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<h2>Compression</h2>
-<p>We support compression and decompression with gzip, Brotli, and Zstandard. Define the corresponding macro when you compile.</p>
-<table><thead><tr><th>Method</th><th>Macro</th></tr></thead><tbody>
-<tr><td>gzip</td><td><code>CPPHTTPLIB_ZLIB_SUPPORT</code></td></tr>
-<tr><td>Brotli</td><td><code>CPPHTTPLIB_BROTLI_SUPPORT</code></td></tr>
-<tr><td>Zstandard</td><td><code>CPPHTTPLIB_ZSTD_SUPPORT</code></td></tr>
-</tbody></table>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://example.com</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_compress</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">true</span><span style="color:#c0c5ce;">);    </span><span style="color:#65737e;">// Compress request body
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_decompress</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">true</span><span style="color:#c0c5ce;">);  </span><span style="color:#65737e;">// Decompress response body
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://example.com&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_compress(</span><span style="color:#0086b3;">true</span><span style="color:#323232;">);    </span><span style="font-style:italic;color:#969896;">// Compress request body
-</span><span style="color:#323232;">cli.set_decompress(</span><span style="color:#0086b3;">true</span><span style="color:#323232;">);  </span><span style="font-style:italic;color:#969896;">// Decompress response body
-</span></pre>
-</div></div>
-<h2>Proxy</h2>
-<p>You can connect through an HTTP proxy.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://example.com</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_proxy</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">proxy.example.com</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8080</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_proxy_basic_auth</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">user</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">password</span><span style="color:#c0c5ce;">&quot;);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://example.com&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_proxy(</span><span style="color:#183691;">&quot;proxy.example.com&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8080</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_proxy_basic_auth(</span><span style="color:#183691;">&quot;user&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;password&quot;</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<h2>Timeouts</h2>
-<p>You can set connection, read, and write timeouts individually.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://example.com</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_connection_timeout</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">5</span><span style="color:#c0c5ce;">, </span><span style="color:#d08770;">0</span><span style="color:#c0c5ce;">);  </span><span style="color:#65737e;">// 5 seconds
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_read_timeout</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">10</span><span style="color:#c0c5ce;">, </span><span style="color:#d08770;">0</span><span style="color:#c0c5ce;">);       </span><span style="color:#65737e;">// 10 seconds
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_write_timeout</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">10</span><span style="color:#c0c5ce;">, </span><span style="color:#d08770;">0</span><span style="color:#c0c5ce;">);      </span><span style="color:#65737e;">// 10 seconds
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://example.com&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_connection_timeout(</span><span style="color:#0086b3;">5</span><span style="color:#323232;">, </span><span style="color:#0086b3;">0</span><span style="color:#323232;">);  </span><span style="font-style:italic;color:#969896;">// 5 seconds
-</span><span style="color:#323232;">cli.set_read_timeout(</span><span style="color:#0086b3;">10</span><span style="color:#323232;">, </span><span style="color:#0086b3;">0</span><span style="color:#323232;">);       </span><span style="font-style:italic;color:#969896;">// 10 seconds
-</span><span style="color:#323232;">cli.set_write_timeout(</span><span style="color:#0086b3;">10</span><span style="color:#323232;">, </span><span style="color:#0086b3;">0</span><span style="color:#323232;">);      </span><span style="font-style:italic;color:#969896;">// 10 seconds
-</span></pre>
-</div></div>
-<h2>Keep-Alive</h2>
-<p>If you're making multiple requests to the same server, enable Keep-Alive. It reuses the TCP connection, which is much more efficient.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://example.com</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_keep_alive</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">true</span><span style="color:#c0c5ce;">);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://example.com&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_keep_alive(</span><span style="color:#0086b3;">true</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<h2>Server Middleware</h2>
-<p>You can hook into request processing before and after handlers run.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_pre_routing_handler</span><span style="color:#c0c5ce;">([](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// Runs before every request
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">return</span><span style="color:#c0c5ce;"> httplib::Server::HandlerResponse::Unhandled;  </span><span style="color:#65737e;">// Continue to normal routing
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_post_routing_handler</span><span style="color:#c0c5ce;">([](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// Runs after the response is sent
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_header</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">X-Server</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">cpp-httplib</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.set_pre_routing_handler([](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// Runs before every request
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">return</span><span style="color:#323232;"> httplib::Server::HandlerResponse::Unhandled;  </span><span style="font-style:italic;color:#969896;">// Continue to normal routing
-</span><span style="color:#323232;">});
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">svr.set_post_routing_handler([](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// Runs after the response is sent
-</span><span style="color:#323232;">    res.set_header(</span><span style="color:#183691;">&quot;X-Server&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;cpp-httplib&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>Use <code>req.user_data</code> to pass data from middleware to handlers. This is useful for sharing things like decoded auth tokens.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_pre_routing_handler</span><span style="color:#c0c5ce;">([](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    req.</span><span style="color:#bf616a;">user_data</span><span style="color:#c0c5ce;">[&quot;</span><span style="color:#a3be8c;">auth_user</span><span style="color:#c0c5ce;">&quot;] = </span><span style="color:#8fa1b3;">std::string</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">alice</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">return</span><span style="color:#c0c5ce;"> httplib::Server::HandlerResponse::Unhandled;
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/me</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> user = std::</span><span style="color:#8fa1b3;">any_cast</span><span style="color:#c0c5ce;">&lt;std::string&gt;(req.</span><span style="color:#bf616a;">user_data</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">at</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">auth_user</span><span style="color:#c0c5ce;">&quot;));
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello, </span><span style="color:#c0c5ce;">&quot; + user, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.set_pre_routing_handler([](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    req.user_data[</span><span style="color:#183691;">&quot;auth_user&quot;</span><span style="color:#323232;">] </span><span style="font-weight:bold;color:#a71d5d;">= </span><span style="color:#323232;">std::string(</span><span style="color:#183691;">&quot;alice&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">return</span><span style="color:#323232;"> httplib::Server::HandlerResponse::Unhandled;
-</span><span style="color:#323232;">});
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/me&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> user </span><span style="font-weight:bold;color:#a71d5d;">= </span><span style="color:#323232;">std::any_cast&lt;std::string&gt;(req.user_data.at(</span><span style="color:#183691;">&quot;auth_user&quot;</span><span style="color:#323232;">));
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Hello, &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> user, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>You can also customize error and exception handlers.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_error_handler</span><span style="color:#c0c5ce;">([](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Custom Error Page</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/html</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_exception_handler</span><span style="color:#c0c5ce;">([](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res, std::exception_ptr ep) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">= </span><span style="color:#d08770;">500</span><span style="color:#c0c5ce;">;
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Internal Server Error</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.set_error_handler([](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Custom Error Page&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/html&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">svr.set_exception_handler([](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res, std::exception_ptr ep) {
-</span><span style="color:#323232;">    res.status </span><span style="font-weight:bold;color:#a71d5d;">= </span><span style="color:#0086b3;">500</span><span style="color:#323232;">;
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Internal Server Error&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h2>Logging</h2>
-<p>You can set a logger on both the server and the client.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_logger</span><span style="color:#c0c5ce;">([](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; req.</span><span style="color:#bf616a;">method </span><span style="color:#c0c5ce;">&lt;&lt; &quot; &quot; &lt;&lt; req.</span><span style="color:#bf616a;">path </span><span style="color:#c0c5ce;">&lt;&lt; &quot; &quot; &lt;&lt; res.</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.set_logger([](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> req.method </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot; &quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> req.path </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot; &quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res.status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h2>Unix Domain Socket</h2>
-<p>In addition to TCP, we support Unix Domain Sockets. You can use them for inter-process communication on the same machine.</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#65737e;">// Server
-</span><span style="color:#c0c5ce;">httplib::Server svr;
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_address_family</span><span style="color:#c0c5ce;">(AF_UNIX);
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/tmp/httplib.sock</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">0</span><span style="color:#c0c5ce;">);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-style:italic;color:#969896;">// Server
-</span><span style="color:#323232;">httplib::Server svr;
-</span><span style="color:#323232;">svr.set_address_family(AF_UNIX);
-</span><span style="color:#323232;">svr.listen(</span><span style="color:#183691;">&quot;/tmp/httplib.sock&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">0</span><span style="color:#323232;">);
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#65737e;">// Client
-</span><span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">http://localhost</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_address_family</span><span style="color:#c0c5ce;">(AF_UNIX);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_hostname_addr_map</span><span style="color:#c0c5ce;">({{&quot;</span><span style="color:#a3be8c;">localhost</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">/tmp/httplib.sock</span><span style="color:#c0c5ce;">&quot;}});
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-style:italic;color:#969896;">// Client
-</span><span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;http://localhost&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_address_family(AF_UNIX);
-</span><span style="color:#323232;">cli.set_hostname_addr_map({{</span><span style="color:#183691;">&quot;localhost&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;/tmp/httplib.sock&quot;</span><span style="color:#323232;">}});
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<h2>Learn More</h2>
-<p>Want to dig deeper? Check out these resources.</p>
-<ul>
-<li>Cookbook — A collection of recipes for common use cases</li>
-<li><a href="https://github.com/yhirose/cpp-httplib/blob/master/README.md">README</a> — Full API reference</li>
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-    <h1>Getting Started</h1>
-    <p>cpp-httplibを始めるのに必要なのは、<code>httplib.h</code>とC++コンパイラーだけです。ファイルをダウンロードして、Hello Worldサーバーを動かすところまでやってみましょう。</p>
-<h2>httplib.h の入手</h2>
-<p>GitHubから直接ダウンロードできます。常に最新版を使ってください。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> -LO</span><span style="color:#c0c5ce;"> https://github.com/yhirose/cpp-httplib/raw/refs/tags/latest/httplib.h
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl -LO https://github.com/yhirose/cpp-httplib/raw/refs/tags/latest/httplib.h
-</span></pre>
-</div></div>
-<p>ダウンロードした <code>httplib.h</code> をプロジェクトのディレクトリに置けば、準備完了です。</p>
-<h2>コンパイラーの準備</h2>
-<table><thead><tr><th>OS</th><th>開発環境</th><th>セットアップ</th></tr></thead><tbody>
-<tr><td>macOS</td><td>Apple Clang</td><td>Xcode Command Line Tools (<code>xcode-select --install</code>)</td></tr>
-<tr><td>Ubuntu</td><td>clang++ または g++</td><td><code>apt install clang</code> または <code>apt install g++</code></td></tr>
-<tr><td>Windows</td><td>MSVC</td><td>Visual Studio 2022 以降（C++ コンポーネントを含めてインストール）</td></tr>
-</tbody></table>
-<h2>Hello World サーバー</h2>
-<p>次のコードを <code>server.cpp</code> として保存しましょう。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Server svr;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const</span><span style="color:#c0c5ce;"> httplib::Request&amp;, httplib::Response&amp; res) {
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello, World!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8080</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Server svr;
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const</span><span style="color:#323232;"> httplib::Request</span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">, httplib::Response</span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;"> res) {
-</span><span style="color:#323232;">        res.set_content(</span><span style="color:#183691;">&quot;Hello, World!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.listen(</span><span style="color:#183691;">&quot;0.0.0.0&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8080</span><span style="color:#323232;">);
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>たった数行で、HTTPリクエストに応答するサーバーが書けます。</p>
-<h2>コンパイルと実行</h2>
-<p>このチュートリアルのサンプルコードは、コードを簡潔に書けるC++17で書いています。cpp-httplib自体はC++11でもコンパイルできます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#65737e;"># macOS
-</span><span style="color:#8fa1b3;">clang++</span><span style="color:#bf616a;"> -std</span><span style="color:#c0c5ce;">=c++17</span><span style="color:#bf616a;"> -o</span><span style="color:#c0c5ce;"> server server.cpp
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;"># Linux
-</span><span style="color:#65737e;"># `-pthread`: cpp-httplibは内部でスレッドを使用
-</span><span style="color:#8fa1b3;">clang++</span><span style="color:#bf616a;"> -std</span><span style="color:#c0c5ce;">=c++17</span><span style="color:#bf616a;"> -pthread -o</span><span style="color:#c0c5ce;"> server server.cpp
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;"># Windows (Developer Command Prompt)
-</span><span style="color:#65737e;"># `/EHsc`: C++例外処理を有効化
-</span><span style="color:#8fa1b3;">cl</span><span style="color:#c0c5ce;"> /EHsc /std:c++17 server.cpp
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-style:italic;color:#969896;"># macOS
-</span><span style="color:#323232;">clang++ -std</span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;">c++17 -o server server.cpp
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;"># Linux
-</span><span style="font-style:italic;color:#969896;"># `-pthread`: cpp-httplibは内部でスレッドを使用
-</span><span style="color:#323232;">clang++ -std</span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;">c++17 -pthread -o server server.cpp
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;"># Windows (Developer Command Prompt)
-</span><span style="font-style:italic;color:#969896;"># `/EHsc`: C++例外処理を有効化
-</span><span style="color:#323232;">cl /EHsc /std:c++17 server.cpp
-</span></pre>
-</div></div>
-<p>コンパイルできたら実行します。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#65737e;"># macOS / Linux
-</span><span style="color:#8fa1b3;">./server
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;"># Windows
-</span><span style="color:#8fa1b3;">server.exe
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-style:italic;color:#969896;"># macOS / Linux
-</span><span style="color:#323232;">./server
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;"># Windows
-</span><span style="color:#323232;">server.exe
-</span></pre>
-</div></div>
-<p>ブラウザで <code>http://localhost:8080</code> を開いてください。"Hello, World!" と表示されれば成功です。</p>
-<p><code>curl</code> でも確認できます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#c0c5ce;"> http://localhost:8080/
-</span><span style="color:#65737e;"># Hello, World!
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl http://localhost:8080/
-</span><span style="font-style:italic;color:#969896;"># Hello, World!
-</span></pre>
-</div></div>
-<p>サーバーを停止するには、ターミナルで <code>Ctrl+C</code> を押します。</p>
-<h2>次のステップ</h2>
-<p>サーバーの基本がわかりましたね。次は、クライアント側を見てみましょう。cpp-httplibはHTTPクライアント機能も備えています。</p>
-<p><strong>次:</strong> <a href="../02-basic-client">Basic Client</a></p>
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-    <h1>Basic Client</h1>
-    <p>cpp-httplibはサーバーだけでなく、HTTPクライアント機能も備えています。<code>httplib::Client</code> を使って、GETやPOSTリクエストを送ってみましょう。</p>
-<h2>テスト用サーバーの準備</h2>
-<p>クライアントの動作を確認するために、リクエストを受け付けるサーバーを用意します。次のコードを保存し、前章と同じ手順でコンパイル・実行してください。サーバーの詳しい解説は次章で行います。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Server svr;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/search</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> q = req.</span><span style="color:#8fa1b3;">get_param_value</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">q</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Query: </span><span style="color:#c0c5ce;">&quot; + q, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/post</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(req.</span><span style="color:#bf616a;">body</span><span style="color:#c0c5ce;">, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/submit</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">        std::string result;
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">for </span><span style="color:#c0c5ce;">(</span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;[key, val] : req.</span><span style="color:#bf616a;">params</span><span style="color:#c0c5ce;">) {
-</span><span style="color:#c0c5ce;">            result += key + &quot;</span><span style="color:#a3be8c;"> = </span><span style="color:#c0c5ce;">&quot; + val + &quot;</span><span style="color:#96b5b4;">\n</span><span style="color:#c0c5ce;">&quot;;
-</span><span style="color:#c0c5ce;">        }
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(result, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/upload</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> f = req.</span><span style="color:#bf616a;">form</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">get_file</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">file</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> content = f.</span><span style="color:#bf616a;">filename </span><span style="color:#c0c5ce;">+ &quot;</span><span style="color:#a3be8c;"> (</span><span style="color:#c0c5ce;">&quot; + </span><span style="color:#8fa1b3;">std::to_string</span><span style="color:#c0c5ce;">(f.</span><span style="color:#bf616a;">content</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">size</span><span style="color:#c0c5ce;">()) + &quot;</span><span style="color:#a3be8c;"> bytes)</span><span style="color:#c0c5ce;">&quot;;
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(content, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/users/:id</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> id = req.</span><span style="color:#bf616a;">path_params</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">at</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">id</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">User ID: </span><span style="color:#c0c5ce;">&quot; + id, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(</span><span style="color:#b48ead;">R</span><span style="color:#c0c5ce;">&quot;(</span><span style="color:#a3be8c;">/files/(\d+)</span><span style="color:#c0c5ce;">)&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> id = req.</span><span style="color:#bf616a;">matches</span><span style="color:#c0c5ce;">[</span><span style="color:#d08770;">1</span><span style="color:#c0c5ce;">];
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">File ID: </span><span style="color:#c0c5ce;">&quot; + </span><span style="color:#8fa1b3;">std::string</span><span style="color:#c0c5ce;">(id), &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Listening on port 8080...</span><span style="color:#c0c5ce;">&quot; &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8080</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Server svr;
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">        res.set_content(</span><span style="color:#183691;">&quot;Hello!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Get(</span><span style="color:#183691;">&quot;/search&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> q </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.get_param_value(</span><span style="color:#183691;">&quot;q&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">        res.set_content(</span><span style="color:#183691;">&quot;Query: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> q, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Post(</span><span style="color:#183691;">&quot;/post&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">        res.set_content(req.body, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Post(</span><span style="color:#183691;">&quot;/submit&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">        std::string result;
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">for </span><span style="color:#323232;">(</span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">[key, val] </span><span style="font-weight:bold;color:#a71d5d;">:</span><span style="color:#323232;"> req.params) {
-</span><span style="color:#323232;">            result </span><span style="font-weight:bold;color:#a71d5d;">+=</span><span style="color:#323232;"> key </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; = &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> val </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot;</span><span style="color:#0086b3;">\n</span><span style="color:#183691;">&quot;</span><span style="color:#323232;">;
-</span><span style="color:#323232;">        }
-</span><span style="color:#323232;">        res.set_content(result, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Post(</span><span style="color:#183691;">&quot;/upload&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> f </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.form.get_file(</span><span style="color:#183691;">&quot;file&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> content </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> f.filename </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; (&quot; </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#323232;">std::to_string(f.content.size()) </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; bytes)&quot;</span><span style="color:#323232;">;
-</span><span style="color:#323232;">        res.set_content(content, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Get(</span><span style="color:#183691;">&quot;/users/:id&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> id </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.path_params.at(</span><span style="color:#183691;">&quot;id&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">        res.set_content(</span><span style="color:#183691;">&quot;User ID: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> id, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Get(</span><span style="font-weight:bold;color:#a71d5d;">R</span><span style="color:#183691;">&quot;(/files/(\d+))&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> id </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.matches[</span><span style="color:#0086b3;">1</span><span style="color:#323232;">];
-</span><span style="color:#323232;">        res.set_content(</span><span style="color:#183691;">&quot;File ID: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#323232;">std::string(id), </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Listening on port 8080...&quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    svr.listen(</span><span style="color:#183691;">&quot;0.0.0.0&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8080</span><span style="color:#323232;">);
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<h2>GETリクエスト</h2>
-<p>サーバーが起動したら、別のターミナルを開いて試してみましょう。まず、最もシンプルなGETリクエストです。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">http://localhost:8080</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// 200
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;    </span><span style="color:#65737e;">// Hello!
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Client cli(</span><span style="color:#183691;">&quot;http://localhost:8080&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// 200
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;    </span><span style="font-style:italic;color:#969896;">// Hello!
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p><code>httplib::Client</code> のコンストラクターにサーバーのアドレスを渡し、<code>Get()</code> でリクエストを送ります。戻り値の <code>res</code> からステータスコードやボディを取得できます。</p>
-<p>対応する <code>curl</code> コマンドはこうなります。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#c0c5ce;"> http://localhost:8080/hi
-</span><span style="color:#65737e;"># Hello!
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl http://localhost:8080/hi
-</span><span style="font-style:italic;color:#969896;"># Hello!
-</span></pre>
-</div></div>
-<h2>レスポンスの確認</h2>
-<p>レスポンスには、ステータスコードとボディ以外にもヘッダー情報が含まれています。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// ステータスコード
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// 200
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// ボディ
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// Hello!
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// ヘッダー
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#8fa1b3;">get_header_value</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Content-Type</span><span style="color:#c0c5ce;">&quot;) &lt;&lt; std::endl;  </span><span style="color:#65737e;">// text/plain
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">);
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// ステータスコード
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// 200
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// ボディ
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// Hello!
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// ヘッダー
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;get_header_value(</span><span style="color:#183691;">&quot;Content-Type&quot;</span><span style="color:#323232;">) </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// text/plain
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p><code>res-&gt;body</code> は <code>std::string</code> なので、JSON レスポンスをパースしたい場合は <a href="https://github.com/nlohmann/json">nlohmann/json</a> などの JSON ライブラリにそのまま渡せます。</p>
-<h2>クエリパラメーター</h2>
-<p>GETリクエストにクエリパラメーターを付けるには、URLに直接書くか、<code>httplib::Params</code> を使います。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/search</span><span style="color:#c0c5ce;">&quot;, httplib::Params{{&quot;</span><span style="color:#a3be8c;">q</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">cpp-httplib</span><span style="color:#c0c5ce;">&quot;}});
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// Query: cpp-httplib
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/search&quot;</span><span style="color:#323232;">, httplib::Params{{</span><span style="color:#183691;">&quot;q&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;cpp-httplib&quot;</span><span style="color:#323232;">}});
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// Query: cpp-httplib
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p><code>httplib::Params</code> を使うと、特殊文字のURLエンコードを自動で行ってくれます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">http://localhost:8080/search?q=cpp-httplib</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#65737e;"># Query: cpp-httplib
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl </span><span style="color:#183691;">&quot;http://localhost:8080/search?q=cpp-httplib&quot;
-</span><span style="font-style:italic;color:#969896;"># Query: cpp-httplib
-</span></pre>
-</div></div>
-<h2>パスパラメーター</h2>
-<p>URLのパスに値を直接埋め込む場合も、クライアント側は特別なAPIは不要です。パスをそのまま <code>Get()</code> に渡すだけです。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/users/42</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// User ID: 42
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/users/42&quot;</span><span style="color:#323232;">);
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// User ID: 42
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#c0c5ce;"> http://localhost:8080/users/42
-</span><span style="color:#65737e;"># User ID: 42
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl http://localhost:8080/users/42
-</span><span style="font-style:italic;color:#969896;"># User ID: 42
-</span></pre>
-</div></div>
-<p>テスト用サーバーには、正規表現でIDを数字のみに絞った <code>/files/(\d+)</code> もあります。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/files/42</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// File ID: 42
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/files/42&quot;</span><span style="color:#323232;">);
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// File ID: 42
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#c0c5ce;"> http://localhost:8080/files/42
-</span><span style="color:#65737e;"># File ID: 42
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl http://localhost:8080/files/42
-</span><span style="font-style:italic;color:#969896;"># File ID: 42
-</span></pre>
-</div></div>
-<p><code>/files/abc</code> のように数字以外を渡すと404が返ります。仕組みは次章で解説します。</p>
-<h2>リクエストヘッダー</h2>
-<p>カスタムHTTPヘッダーを付けるには、<code>httplib::Headers</code> を渡します。<code>Get()</code> や <code>Post()</code> のどちらでも使えます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;, httplib::Headers{
-</span><span style="color:#c0c5ce;">    {&quot;</span><span style="color:#a3be8c;">Authorization</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">Bearer my-token</span><span style="color:#c0c5ce;">&quot;}
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">, httplib::Headers{
-</span><span style="color:#323232;">    {</span><span style="color:#183691;">&quot;Authorization&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;Bearer my-token&quot;</span><span style="color:#323232;">}
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> -H </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">Authorization: Bearer my-token</span><span style="color:#c0c5ce;">&quot; http://localhost:8080/hi
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl -H </span><span style="color:#183691;">&quot;Authorization: Bearer my-token&quot;</span><span style="color:#323232;"> http://localhost:8080/hi
-</span></pre>
-</div></div>
-<h2>POSTリクエスト</h2>
-<p>テキストデータをPOSTしてみましょう。<code>Post()</code> の第2引数にボディ、第3引数にContent-Typeを指定します。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/post</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">Hello, Server!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// 200
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;    </span><span style="color:#65737e;">// Hello, Server!
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Post(</span><span style="color:#183691;">&quot;/post&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;Hello, Server!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// 200
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;    </span><span style="font-style:italic;color:#969896;">// Hello, Server!
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>テスト用サーバーの <code>/post</code> はボディをそのまま返すので、送った文字列がそのまま返ってきます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> -X</span><span style="color:#c0c5ce;"> POST</span><span style="color:#bf616a;"> -H </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">Content-Type: text/plain</span><span style="color:#c0c5ce;">&quot;</span><span style="color:#bf616a;"> -d </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">Hello, Server!</span><span style="color:#c0c5ce;">&quot; http://localhost:8080/post
-</span><span style="color:#65737e;"># Hello, Server!
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl -X POST -H </span><span style="color:#183691;">&quot;Content-Type: text/plain&quot;</span><span style="color:#323232;"> -d </span><span style="color:#183691;">&quot;Hello, Server!&quot;</span><span style="color:#323232;"> http://localhost:8080/post
-</span><span style="font-style:italic;color:#969896;"># Hello, Server!
-</span></pre>
-</div></div>
-<h2>フォームデータの送信</h2>
-<p>HTMLフォームのように、キーと値のペアを送ることもできます。<code>httplib::Params</code> を使います。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/submit</span><span style="color:#c0c5ce;">&quot;, httplib::Params{
-</span><span style="color:#c0c5ce;">    {&quot;</span><span style="color:#a3be8c;">name</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">Alice</span><span style="color:#c0c5ce;">&quot;},
-</span><span style="color:#c0c5ce;">    {&quot;</span><span style="color:#a3be8c;">age</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">30</span><span style="color:#c0c5ce;">&quot;}
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// age = 30
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// name = Alice
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Post(</span><span style="color:#183691;">&quot;/submit&quot;</span><span style="color:#323232;">, httplib::Params{
-</span><span style="color:#323232;">    {</span><span style="color:#183691;">&quot;name&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;Alice&quot;</span><span style="color:#323232;">},
-</span><span style="color:#323232;">    {</span><span style="color:#183691;">&quot;age&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;30&quot;</span><span style="color:#323232;">}
-</span><span style="color:#323232;">});
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// age = 30
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// name = Alice
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>これは <code>application/x-www-form-urlencoded</code> 形式で送信されます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> -X</span><span style="color:#c0c5ce;"> POST</span><span style="color:#bf616a;"> -d </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">name=Alice&amp;age=30</span><span style="color:#c0c5ce;">&quot; http://localhost:8080/submit
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl -X POST -d </span><span style="color:#183691;">&quot;name=Alice&amp;age=30&quot;</span><span style="color:#323232;"> http://localhost:8080/submit
-</span></pre>
-</div></div>
-<h2>ファイルのPOST</h2>
-<p>ファイルをアップロードするには、<code>httplib::UploadFormDataItems</code> を使ってマルチパートフォームデータとして送信します。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/upload</span><span style="color:#c0c5ce;">&quot;, httplib::UploadFormDataItems{
-</span><span style="color:#c0c5ce;">    {&quot;</span><span style="color:#a3be8c;">file</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">Hello, File!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">hello.txt</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;}
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// hello.txt (12 bytes)
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Post(</span><span style="color:#183691;">&quot;/upload&quot;</span><span style="color:#323232;">, httplib::UploadFormDataItems{
-</span><span style="color:#323232;">    {</span><span style="color:#183691;">&quot;file&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;Hello, File!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;hello.txt&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">}
-</span><span style="color:#323232;">});
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// hello.txt (12 bytes)
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p><code>UploadFormDataItems</code> の各要素は <code>{name, content, filename, content_type}</code> の4つのフィールドで構成されます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> -F </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">file=Hello, File!;filename=hello.txt;type=text/plain</span><span style="color:#c0c5ce;">&quot; http://localhost:8080/upload
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl -F </span><span style="color:#183691;">&quot;file=Hello, File!;filename=hello.txt;type=text/plain&quot;</span><span style="color:#323232;"> http://localhost:8080/upload
-</span></pre>
-</div></div>
-<h2>エラーハンドリング</h2>
-<p>ネットワーク通信では、サーバーに接続できない場合があります。<code>res</code> が有効かどうかを必ず確認しましょう。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">http://localhost:9999</span><span style="color:#c0c5ce;">&quot;);  </span><span style="color:#65737e;">// 存在しないポート
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(!res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// 接続エラー
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Error: </span><span style="color:#c0c5ce;">&quot; &lt;&lt; </span><span style="color:#8fa1b3;">httplib::to_string</span><span style="color:#c0c5ce;">(res.</span><span style="color:#8fa1b3;">error</span><span style="color:#c0c5ce;">()) &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// Error: Connection
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">return </span><span style="color:#d08770;">1</span><span style="color:#c0c5ce;">;
-</span><span style="color:#c0c5ce;">}
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;">// ここに到達すればレスポンスを受信できている
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">!= </span><span style="color:#d08770;">200</span><span style="color:#c0c5ce;">) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">HTTP Error: </span><span style="color:#c0c5ce;">&quot; &lt;&lt; res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">return </span><span style="color:#d08770;">1</span><span style="color:#c0c5ce;">;
-</span><span style="color:#c0c5ce;">}
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;http://localhost:9999&quot;</span><span style="color:#323232;">);  </span><span style="font-style:italic;color:#969896;">// 存在しないポート
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(</span><span style="font-weight:bold;color:#a71d5d;">!</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// 接続エラー
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Error: &quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#323232;">httplib::to_string(res.error()) </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// Error: Connection
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">return </span><span style="color:#0086b3;">1</span><span style="color:#323232;">;
-</span><span style="color:#323232;">}
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;">// ここに到達すればレスポンスを受信できている
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">!= </span><span style="color:#0086b3;">200</span><span style="color:#323232;">) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;HTTP Error: &quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">return </span><span style="color:#0086b3;">1</span><span style="color:#323232;">;
-</span><span style="color:#323232;">}
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span></pre>
-</div></div>
-<p>エラーには2つのレベルがあります。</p>
-<ul>
-<li><strong>接続エラー</strong>: サーバーに到達できなかった場合。<code>res</code> が偽になり、<code>res.error()</code> でエラーの種類を取得できます</li>
-<li><strong>HTTPエラー</strong>: サーバーからエラーステータス（404、500など）が返ってきた場合。<code>res</code> は真ですが、<code>res-&gt;status</code> を確認する必要があります</li>
-</ul>
-<h2>次のステップ</h2>
-<p>クライアントからリクエストを送る方法がわかりました。次は、サーバー側をもっと詳しく見てみましょう。ルーティングやパスパラメータなど、サーバーの機能を掘り下げます。</p>
-<p><strong>次:</strong> <a href="../03-basic-server">Basic Server</a></p>
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-    <h1>Basic Server</h1>
-    <p>前章ではクライアントからリクエストを送りました。そのとき、テスト用サーバーを用意しましたね。この章では、あのサーバーの仕組みをひとつずつ紐解いていきます。</p>
-<h2>サーバーの起動</h2>
-<p>ルーティングを登録したら、最後に <code>svr.listen()</code> を呼んでサーバーを起動します。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8080</span><span style="color:#c0c5ce;">);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.listen(</span><span style="color:#183691;">&quot;0.0.0.0&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8080</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<p>第1引数はホスト、第2引数はポート番号です。<code>"0.0.0.0"</code> を指定すると、すべてのネットワークインターフェースでリクエストを受け付けます。自分のマシンからのアクセスだけに限定したいときは <code>"127.0.0.1"</code> を使います。</p>
-<p><code>listen()</code> はブロッキング呼び出しです。サーバーが停止するまで、この行から先には進みません。ターミナルで <code>Ctrl+C</code> を押すか、別スレッドから <code>svr.stop()</code> を呼ぶまでサーバーは動き続けます。</p>
-<h2>ルーティング</h2>
-<p>サーバーの核になるのは「ルーティング」です。どのURLに、どのHTTPメソッドでアクセスされたら、何をするか。それを登録する仕組みです。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Server svr;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const</span><span style="color:#c0c5ce;"> httplib::Request &amp;req, httplib::Response &amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Server svr;
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const</span><span style="color:#323232;"> httplib::Request </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">req, httplib::Response </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Hello!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p><code>svr.Get()</code> は、GETリクエストに対するハンドラーを登録します。第1引数がパス、第2引数がハンドラー関数です。<code>/hi</code> にGETリクエストが来たら、このラムダが呼ばれます。</p>
-<p>HTTPメソッドごとにメソッドが用意されています。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/path</span><span style="color:#c0c5ce;">&quot;,    handler);  </span><span style="color:#65737e;">// GET
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/path</span><span style="color:#c0c5ce;">&quot;,   handler);  </span><span style="color:#65737e;">// POST
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Put</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/path</span><span style="color:#c0c5ce;">&quot;,    handler);  </span><span style="color:#65737e;">// PUT
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Delete</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/path</span><span style="color:#c0c5ce;">&quot;, handler);  </span><span style="color:#65737e;">// DELETE
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/path&quot;</span><span style="color:#323232;">,    handler);  </span><span style="font-style:italic;color:#969896;">// GET
-</span><span style="color:#323232;">svr.Post(</span><span style="color:#183691;">&quot;/path&quot;</span><span style="color:#323232;">,   handler);  </span><span style="font-style:italic;color:#969896;">// POST
-</span><span style="color:#323232;">svr.Put(</span><span style="color:#183691;">&quot;/path&quot;</span><span style="color:#323232;">,    handler);  </span><span style="font-style:italic;color:#969896;">// PUT
-</span><span style="color:#323232;">svr.Delete(</span><span style="color:#183691;">&quot;/path&quot;</span><span style="color:#323232;">, handler);  </span><span style="font-style:italic;color:#969896;">// DELETE
-</span></pre>
-</div></div>
-<p>ハンドラーのシグネチャは <code>(const httplib::Request &amp;req, httplib::Response &amp;res)</code> です。<code>auto</code> を使って短く書くこともできます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Hello!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>パスが一致したときだけハンドラーが呼ばれます。登録されていないパスにアクセスすると、自動的に404が返ります。</p>
-<h2>リクエストオブジェクト</h2>
-<p>ハンドラーの第1引数 <code>req</code> から、クライアントが送ってきた情報を読み取れます。</p>
-<h3>ボディ</h3>
-<p><code>req.body</code> でリクエストボディを取得できます。型は <code>std::string</code> です。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/post</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// クライアントが送ったボディをそのまま返す
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(req.</span><span style="color:#bf616a;">body</span><span style="color:#c0c5ce;">, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Post(</span><span style="color:#183691;">&quot;/post&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// クライアントが送ったボディをそのまま返す
-</span><span style="color:#323232;">    res.set_content(req.body, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h3>ヘッダー</h3>
-<p><code>req.get_header_value()</code> でリクエストヘッダーの値を取得できます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/check</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> auth = req.</span><span style="color:#8fa1b3;">get_header_value</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Authorization</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Auth: </span><span style="color:#c0c5ce;">&quot; + auth, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/check&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> auth </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.get_header_value(</span><span style="color:#183691;">&quot;Authorization&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Auth: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> auth, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h3>クエリパラメーターとフォームデータ</h3>
-<p><code>req.get_param_value()</code> でパラメーターを取得できます。GETのクエリパラメーターと、POSTのフォームデータの両方に使えます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/search</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> q = req.</span><span style="color:#8fa1b3;">get_param_value</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">q</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Query: </span><span style="color:#c0c5ce;">&quot; + q, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/search&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> q </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.get_param_value(</span><span style="color:#183691;">&quot;q&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Query: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> q, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p><code>/search?q=cpp-httplib</code> にアクセスすると、<code>q</code> の値は <code>"cpp-httplib"</code> になります。</p>
-<p>すべてのパラメーターをループで処理したいときは、<code>req.params</code> を使います。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/submit</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    std::string result;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">for </span><span style="color:#c0c5ce;">(</span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;[key, val] : req.</span><span style="color:#bf616a;">params</span><span style="color:#c0c5ce;">) {
-</span><span style="color:#c0c5ce;">        result += key + &quot;</span><span style="color:#a3be8c;"> = </span><span style="color:#c0c5ce;">&quot; + val + &quot;</span><span style="color:#96b5b4;">\n</span><span style="color:#c0c5ce;">&quot;;
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(result, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Post(</span><span style="color:#183691;">&quot;/submit&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    std::string result;
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">for </span><span style="color:#323232;">(</span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">[key, val] </span><span style="font-weight:bold;color:#a71d5d;">:</span><span style="color:#323232;"> req.params) {
-</span><span style="color:#323232;">        result </span><span style="font-weight:bold;color:#a71d5d;">+=</span><span style="color:#323232;"> key </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; = &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> val </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot;</span><span style="color:#0086b3;">\n</span><span style="color:#183691;">&quot;</span><span style="color:#323232;">;
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">    res.set_content(result, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h3>ファイルアップロード</h3>
-<p>マルチパートフォームでアップロードされたファイルは、<code>req.form.get_file()</code> で取得します。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/upload</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> f = req.</span><span style="color:#bf616a;">form</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">get_file</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">file</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> content = f.</span><span style="color:#bf616a;">filename </span><span style="color:#c0c5ce;">+ &quot;</span><span style="color:#a3be8c;"> (</span><span style="color:#c0c5ce;">&quot; + </span><span style="color:#8fa1b3;">std::to_string</span><span style="color:#c0c5ce;">(f.</span><span style="color:#bf616a;">content</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">size</span><span style="color:#c0c5ce;">()) + &quot;</span><span style="color:#a3be8c;"> bytes)</span><span style="color:#c0c5ce;">&quot;;
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(content, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Post(</span><span style="color:#183691;">&quot;/upload&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> f </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.form.get_file(</span><span style="color:#183691;">&quot;file&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> content </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> f.filename </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; (&quot; </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#323232;">std::to_string(f.content.size()) </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; bytes)&quot;</span><span style="color:#323232;">;
-</span><span style="color:#323232;">    res.set_content(content, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p><code>f.filename</code> でファイル名、<code>f.content</code> でファイルの中身にアクセスできます。</p>
-<h2>パスパラメーター</h2>
-<p>URLの一部を変数として受け取りたいことがあります。たとえば <code>/users/42</code> の <code>42</code> を取得したい場合です。<code>:param</code> 記法を使うと、URLの一部をキャプチャできます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/users/:id</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> id = req.</span><span style="color:#bf616a;">path_params</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">at</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">id</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">User ID: </span><span style="color:#c0c5ce;">&quot; + id, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/users/:id&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> id </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.path_params.at(</span><span style="color:#183691;">&quot;id&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;User ID: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> id, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p><code>/users/42</code> にアクセスすると、<code>req.path_params.at("id")</code> は <code>"42"</code> を返します。<code>/users/100</code> なら <code>"100"</code> です。</p>
-<p>複数のパスパラメーターも使えます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/users/:user_id/posts/:post_id</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> user_id = req.</span><span style="color:#bf616a;">path_params</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">at</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">user_id</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> post_id = req.</span><span style="color:#bf616a;">path_params</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">at</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">post_id</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">User: </span><span style="color:#c0c5ce;">&quot; + user_id + &quot;</span><span style="color:#a3be8c;">, Post: </span><span style="color:#c0c5ce;">&quot; + post_id, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/users/:user_id/posts/:post_id&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> user_id </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.path_params.at(</span><span style="color:#183691;">&quot;user_id&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> post_id </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.path_params.at(</span><span style="color:#183691;">&quot;post_id&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;User: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> user_id </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot;, Post: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> post_id, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h3>正規表現パターン</h3>
-<p><code>:param</code> の代わりに正規表現をパスに書くこともできます。キャプチャグループの値は <code>req.matches</code> で取得します。型は <code>std::smatch</code> です。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#65737e;">// 数字のみのIDを受け付ける
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(</span><span style="color:#b48ead;">R</span><span style="color:#c0c5ce;">&quot;(</span><span style="color:#a3be8c;">/files/(\d+)</span><span style="color:#c0c5ce;">)&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> id = req.</span><span style="color:#bf616a;">matches</span><span style="color:#c0c5ce;">[</span><span style="color:#d08770;">1</span><span style="color:#c0c5ce;">];  </span><span style="color:#65737e;">// 最初のキャプチャグループ
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">File ID: </span><span style="color:#c0c5ce;">&quot; + </span><span style="color:#8fa1b3;">std::string</span><span style="color:#c0c5ce;">(id), &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-style:italic;color:#969896;">// 数字のみのIDを受け付ける
-</span><span style="color:#323232;">svr.Get(</span><span style="font-weight:bold;color:#a71d5d;">R</span><span style="color:#183691;">&quot;(/files/(\d+))&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> id </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.matches[</span><span style="color:#0086b3;">1</span><span style="color:#323232;">];  </span><span style="font-style:italic;color:#969896;">// 最初のキャプチャグループ
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;File ID: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#323232;">std::string(id), </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p><code>/files/42</code> にはマッチしますが、<code>/files/abc</code> にはマッチしません。入力値を絞り込みたいときに便利です。</p>
-<h2>レスポンスの組み立て</h2>
-<p>ハンドラーの第2引数 <code>res</code> を使って、クライアントに返すレスポンスを組み立てます。</p>
-<h3>ボディとContent-Type</h3>
-<p><code>res.set_content()</code> でボディとContent-Typeを設定します。これだけでステータスコード200のレスポンスが返ります。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Hello!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h3>ステータスコード</h3>
-<p>ステータスコードを変えたいときは、<code>res.status</code> に代入します。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/not-found</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">= </span><span style="color:#d08770;">404</span><span style="color:#c0c5ce;">;
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Not found</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/not-found&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.status </span><span style="font-weight:bold;color:#a71d5d;">= </span><span style="color:#0086b3;">404</span><span style="color:#323232;">;
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Not found&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h3>レスポンスヘッダー</h3>
-<p><code>res.set_header()</code> でレスポンスヘッダーを追加できます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/with-header</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_header</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">X-Custom</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">my-value</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/with-header&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_header(</span><span style="color:#183691;">&quot;X-Custom&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;my-value&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Hello!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h2>前章のサーバーを読み解く</h2>
-<p>ここまでの知識を使って、前章で用意したテスト用サーバーを改めて見てみましょう。</p>
-<h3>GET /hi</h3>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/hi</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/hi&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Hello!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>最もシンプルなハンドラーです。リクエストの情報は使わないので、<code>req</code> の変数名を省略しています。<code>"Hello!"</code> というテキストをそのまま返します。</p>
-<h3>GET /search</h3>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/search</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> q = req.</span><span style="color:#8fa1b3;">get_param_value</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">q</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Query: </span><span style="color:#c0c5ce;">&quot; + q, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/search&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> q </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.get_param_value(</span><span style="color:#183691;">&quot;q&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Query: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> q, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p><code>req.get_param_value("q")</code> でクエリパラメーター <code>q</code> の値を取り出します。<code>/search?q=cpp-httplib</code> なら、レスポンスは <code>"Query: cpp-httplib"</code> になります。</p>
-<h3>POST /post</h3>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/post</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(req.</span><span style="color:#bf616a;">body</span><span style="color:#c0c5ce;">, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Post(</span><span style="color:#183691;">&quot;/post&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_content(req.body, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>クライアントが送ったリクエストボディを、そのままレスポンスとして返すエコーサーバーです。<code>req.body</code> にボディが丸ごと入っています。</p>
-<h3>POST /submit</h3>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/submit</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    std::string result;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">for </span><span style="color:#c0c5ce;">(</span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;[key, val] : req.</span><span style="color:#bf616a;">params</span><span style="color:#c0c5ce;">) {
-</span><span style="color:#c0c5ce;">        result += key + &quot;</span><span style="color:#a3be8c;"> = </span><span style="color:#c0c5ce;">&quot; + val + &quot;</span><span style="color:#96b5b4;">\n</span><span style="color:#c0c5ce;">&quot;;
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(result, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Post(</span><span style="color:#183691;">&quot;/submit&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    std::string result;
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">for </span><span style="color:#323232;">(</span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">[key, val] </span><span style="font-weight:bold;color:#a71d5d;">:</span><span style="color:#323232;"> req.params) {
-</span><span style="color:#323232;">        result </span><span style="font-weight:bold;color:#a71d5d;">+=</span><span style="color:#323232;"> key </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; = &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> val </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot;</span><span style="color:#0086b3;">\n</span><span style="color:#183691;">&quot;</span><span style="color:#323232;">;
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">    res.set_content(result, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>フォームデータとして送られたキーと値のペアを、<code>req.params</code> でループ処理しています。構造化束縛 <code>auto &amp;[key, val]</code> を使って、各ペアを取り出しています。</p>
-<h3>POST /upload</h3>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/upload</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> f = req.</span><span style="color:#bf616a;">form</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">get_file</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">file</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> content = f.</span><span style="color:#bf616a;">filename </span><span style="color:#c0c5ce;">+ &quot;</span><span style="color:#a3be8c;"> (</span><span style="color:#c0c5ce;">&quot; + </span><span style="color:#8fa1b3;">std::to_string</span><span style="color:#c0c5ce;">(f.</span><span style="color:#bf616a;">content</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">size</span><span style="color:#c0c5ce;">()) + &quot;</span><span style="color:#a3be8c;"> bytes)</span><span style="color:#c0c5ce;">&quot;;
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(content, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Post(</span><span style="color:#183691;">&quot;/upload&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> f </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.form.get_file(</span><span style="color:#183691;">&quot;file&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> content </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> f.filename </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; (&quot; </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#323232;">std::to_string(f.content.size()) </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#183691;">&quot; bytes)&quot;</span><span style="color:#323232;">;
-</span><span style="color:#323232;">    res.set_content(content, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>マルチパートフォームで送られたファイルを受け取ります。<code>req.form.get_file("file")</code> で <code>"file"</code> という名前のフィールドを取得し、<code>f.filename</code> と <code>f.content.size()</code> でファイル名とサイズを返しています。</p>
-<h3>GET /users/:id</h3>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/users/:id</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> id = req.</span><span style="color:#bf616a;">path_params</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">at</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">id</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">User ID: </span><span style="color:#c0c5ce;">&quot; + id, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/users/:id&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> id </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.path_params.at(</span><span style="color:#183691;">&quot;id&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;User ID: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> id, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p><code>:id</code> の部分がパスパラメーターです。<code>req.path_params.at("id")</code> で値を取り出しています。<code>/users/42</code> なら <code>"42"</code>、<code>/users/alice</code> なら <code>"alice"</code> が得られます。</p>
-<h3>GET /files/(\d+)</h3>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(</span><span style="color:#b48ead;">R</span><span style="color:#c0c5ce;">&quot;(</span><span style="color:#a3be8c;">/files/(\d+)</span><span style="color:#c0c5ce;">)&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> id = req.</span><span style="color:#bf616a;">matches</span><span style="color:#c0c5ce;">[</span><span style="color:#d08770;">1</span><span style="color:#c0c5ce;">];
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">File ID: </span><span style="color:#c0c5ce;">&quot; + </span><span style="color:#8fa1b3;">std::string</span><span style="color:#c0c5ce;">(id), &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.Get(</span><span style="font-weight:bold;color:#a71d5d;">R</span><span style="color:#183691;">&quot;(/files/(\d+))&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> id </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.matches[</span><span style="color:#0086b3;">1</span><span style="color:#323232;">];
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;File ID: &quot; </span><span style="font-weight:bold;color:#a71d5d;">+ </span><span style="color:#323232;">std::string(id), </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>正規表現 <code>(\d+)</code> で数字だけのIDにマッチします。<code>/files/42</code> にはマッチしますが、<code>/files/abc</code> は404になります。<code>req.matches[1]</code> で最初のキャプチャグループの値を取得しています。</p>
-<h2>次のステップ</h2>
-<p>サーバーの基本がわかりましたね。ルーティング、リクエストの読み取り、レスポンスの組み立て。これだけで、十分に実用的なAPIサーバーが作れます。</p>
-<p>次は、静的ファイルの配信を見てみましょう。HTMLやCSSを配信するサーバーを作ります。</p>
-<p><strong>次:</strong> <a href="../04-static-file-server">Static File Server</a></p>
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-    <h1>Static File Server</h1>
-    <p>cpp-httplibは、HTMLやCSS、画像ファイルなどの静的ファイルも配信できます。面倒な設定は要りません。<code>set_mount_point()</code> を1行呼ぶだけです。</p>
-<h2>set_mount_point の基本</h2>
-<p>さっそくやってみましょう。<code>set_mount_point()</code> は、URLのパスとローカルディレクトリを紐づけます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Server svr;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">set_mount_point</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">./html</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Listening on port 8080...</span><span style="color:#c0c5ce;">&quot; &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8080</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Server svr;
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.set_mount_point(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;./html&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Listening on port 8080...&quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    svr.listen(</span><span style="color:#183691;">&quot;0.0.0.0&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8080</span><span style="color:#323232;">);
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>第1引数がURLのマウントポイント、第2引数がローカルのディレクトリパスです。この例だと、<code>/</code> へのリクエストを <code>./html</code> ディレクトリから配信します。</p>
-<p>試してみましょう。まず <code>html</code> ディレクトリを作って、<code>index.html</code> を置きます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">mkdir</span><span style="color:#c0c5ce;"> html
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">mkdir html
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">&lt;!</span><span style="color:#bf616a;">DOCTYPE</span><span style="color:#c0c5ce;"> html&gt;
-</span><span style="color:#c0c5ce;">&lt;</span><span style="color:#bf616a;">html</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">&lt;</span><span style="color:#bf616a;">head</span><span style="color:#c0c5ce;">&gt;&lt;</span><span style="color:#bf616a;">title</span><span style="color:#c0c5ce;">&gt;My Page&lt;/</span><span style="color:#bf616a;">title</span><span style="color:#c0c5ce;">&gt;&lt;/</span><span style="color:#bf616a;">head</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">&lt;</span><span style="color:#bf616a;">body</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">    &lt;</span><span style="color:#bf616a;">h1</span><span style="color:#c0c5ce;">&gt;Hello from cpp-httplib!&lt;/</span><span style="color:#bf616a;">h1</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">    &lt;</span><span style="color:#bf616a;">p</span><span style="color:#c0c5ce;">&gt;This is a static file.&lt;/</span><span style="color:#bf616a;">p</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">&lt;/</span><span style="color:#bf616a;">body</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">&lt;/</span><span style="color:#bf616a;">html</span><span style="color:#c0c5ce;">&gt;
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">&lt;!</span><span style="color:#63a35c;">DOCTYPE</span><span style="color:#323232;"> html&gt;
-</span><span style="color:#323232;">&lt;</span><span style="color:#63a35c;">html</span><span style="color:#323232;">&gt;
-</span><span style="color:#323232;">&lt;</span><span style="color:#63a35c;">head</span><span style="color:#323232;">&gt;&lt;</span><span style="color:#63a35c;">title</span><span style="color:#323232;">&gt;My Page&lt;/</span><span style="color:#63a35c;">title</span><span style="color:#323232;">&gt;&lt;/</span><span style="color:#63a35c;">head</span><span style="color:#323232;">&gt;
-</span><span style="color:#323232;">&lt;</span><span style="color:#63a35c;">body</span><span style="color:#323232;">&gt;
-</span><span style="color:#323232;">    &lt;</span><span style="color:#63a35c;">h1</span><span style="color:#323232;">&gt;Hello from cpp-httplib!&lt;/</span><span style="color:#63a35c;">h1</span><span style="color:#323232;">&gt;
-</span><span style="color:#323232;">    &lt;</span><span style="color:#63a35c;">p</span><span style="color:#323232;">&gt;This is a static file.&lt;/</span><span style="color:#63a35c;">p</span><span style="color:#323232;">&gt;
-</span><span style="color:#323232;">&lt;/</span><span style="color:#63a35c;">body</span><span style="color:#323232;">&gt;
-</span><span style="color:#323232;">&lt;/</span><span style="color:#63a35c;">html</span><span style="color:#323232;">&gt;
-</span></pre>
-</div></div>
-<p>コンパイルして起動します。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">g++</span><span style="color:#bf616a;"> -std</span><span style="color:#c0c5ce;">=c++17</span><span style="color:#bf616a;"> -o</span><span style="color:#c0c5ce;"> server server.cpp</span><span style="color:#bf616a;"> -pthread
-</span><span style="color:#8fa1b3;">./server
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">g++ -std</span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;">c++17 -o server server.cpp -pthread
-</span><span style="color:#323232;">./server
-</span></pre>
-</div></div>
-<p>ブラウザで <code>http://localhost:8080</code> を開いてみてください。<code>html/index.html</code> の内容が表示されるはずです。<code>http://localhost:8080/index.html</code> でも同じページが返ります。</p>
-<p>もちろん、前章のクライアントコードや <code>curl</code> でもアクセスできますよ。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">http://localhost:8080</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// HTMLが表示される
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;http://localhost:8080&quot;</span><span style="color:#323232;">);
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">);
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// HTMLが表示される
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#c0c5ce;"> http://localhost:8080
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl http://localhost:8080
-</span></pre>
-</div></div>
-<h2>複数のマウントポイント</h2>
-<p><code>set_mount_point()</code> は何回でも呼べます。URLのパスごとに、別々のディレクトリを割り当てられます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_mount_point</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">./public</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_mount_point</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/assets</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">./static/assets</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_mount_point</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/docs</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">./documentation</span><span style="color:#c0c5ce;">&quot;);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.set_mount_point(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;./public&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">svr.set_mount_point(</span><span style="color:#183691;">&quot;/assets&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;./static/assets&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">svr.set_mount_point(</span><span style="color:#183691;">&quot;/docs&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;./documentation&quot;</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<p><code>/assets/style.css</code> なら <code>./static/assets/style.css</code> を、<code>/docs/guide.html</code> なら <code>./documentation/guide.html</code> を配信します。</p>
-<h2>ハンドラーとの組み合わせ</h2>
-<p>静的ファイルの配信と、前章で学んだルーティングハンドラーは共存できます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Server svr;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;">// APIエンドポイント
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/api/hello</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(</span><span style="color:#b48ead;">R</span><span style="color:#c0c5ce;">&quot;(</span><span style="color:#a3be8c;">{&quot;message&quot;:&quot;Hello!&quot;}</span><span style="color:#c0c5ce;">)&quot;, &quot;</span><span style="color:#a3be8c;">application/json</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;">// 静的ファイル配信
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_mount_point</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">./public</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8080</span><span style="color:#c0c5ce;">);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Server svr;
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;">// APIエンドポイント
-</span><span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/api/hello&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_content(</span><span style="font-weight:bold;color:#a71d5d;">R</span><span style="color:#183691;">&quot;({&quot;message&quot;:&quot;Hello!&quot;})&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;application/json&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;">// 静的ファイル配信
-</span><span style="color:#323232;">svr.set_mount_point(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;./public&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">svr.listen(</span><span style="color:#183691;">&quot;0.0.0.0&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8080</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<p>ハンドラーが先に評価されます。<code>/api/hello</code> にはハンドラーが応答し、それ以外のパスは <code>./public</code> ディレクトリからファイルを探します。</p>
-<h2>レスポンスヘッダーの追加</h2>
-<p><code>set_mount_point()</code> の第3引数にヘッダーを渡すと、静的ファイルのレスポンスにカスタムヘッダーを付けられます。キャッシュ制御に便利です。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_mount_point</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">./public</span><span style="color:#c0c5ce;">&quot;, {
-</span><span style="color:#c0c5ce;">    {&quot;</span><span style="color:#a3be8c;">Cache-Control</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">max-age=3600</span><span style="color:#c0c5ce;">&quot;}
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.set_mount_point(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;./public&quot;</span><span style="color:#323232;">, {
-</span><span style="color:#323232;">    {</span><span style="color:#183691;">&quot;Cache-Control&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;max-age=3600&quot;</span><span style="color:#323232;">}
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>こうすると、ブラウザは配信されたファイルを1時間キャッシュします。</p>
-<h2>静的ファイルサーバー用のDockerファイル</h2>
-<p>cpp-httplibのリポジトリには、静的ファイルサーバー用の <code>Dockerfile</code> が含まれています。Docker Hubにビルド済みイメージも公開しているので、1コマンドで起動できます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">&gt; docker run</span><span style="color:#bf616a;"> -p</span><span style="color:#c0c5ce;"> 8080:80</span><span style="color:#bf616a;"> -v</span><span style="color:#c0c5ce;"> ./my-site:/html yhirose4dockerhub/cpp-httplib-server
-</span><span style="color:#8fa1b3;">Serving</span><span style="color:#c0c5ce;"> HTTP on 0.0.0.0:80
-</span><span style="color:#8fa1b3;">Mount</span><span style="color:#c0c5ce;"> point: / -&gt; ./html
-</span><span style="color:#8fa1b3;">Press</span><span style="color:#c0c5ce;"> Ctrl+C to shutdown gracefully...
-</span><span style="color:#8fa1b3;">192.168.65.1</span><span style="color:#c0c5ce;"> - - </span><span style="color:#b48ead;">[</span><span style="color:#c0c5ce;">22/Feb/2026:12:00:00 +0000</span><span style="color:#b48ead;">] </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">GET / HTTP/1.1</span><span style="color:#c0c5ce;">&quot; 200 256 &quot;</span><span style="color:#a3be8c;">-</span><span style="color:#c0c5ce;">&quot; &quot;</span><span style="color:#a3be8c;">Mozilla/5.0 ...</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#8fa1b3;">192.168.65.1</span><span style="color:#c0c5ce;"> - - </span><span style="color:#b48ead;">[</span><span style="color:#c0c5ce;">22/Feb/2026:12:00:00 +0000</span><span style="color:#b48ead;">] </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">GET /style.css HTTP/1.1</span><span style="color:#c0c5ce;">&quot; 200 1024 &quot;</span><span style="color:#a3be8c;">-</span><span style="color:#c0c5ce;">&quot; &quot;</span><span style="color:#a3be8c;">Mozilla/5.0 ...</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#8fa1b3;">192.168.65.1</span><span style="color:#c0c5ce;"> - - </span><span style="color:#b48ead;">[</span><span style="color:#c0c5ce;">22/Feb/2026:12:00:01 +0000</span><span style="color:#b48ead;">] </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">GET /favicon.ico HTTP/1.1</span><span style="color:#c0c5ce;">&quot; 404 152 &quot;</span><span style="color:#a3be8c;">-</span><span style="color:#c0c5ce;">&quot; &quot;</span><span style="color:#a3be8c;">Mozilla/5.0 ...</span><span style="color:#c0c5ce;">&quot;
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">&gt;</span><span style="color:#323232;"> docker run -p 8080:80 -v ./my-site:/html yhirose4dockerhub/cpp-httplib-server
-</span><span style="color:#323232;">Serving HTTP on 0.0.0.0:80
-</span><span style="color:#323232;">Mount point: / -</span><span style="font-weight:bold;color:#a71d5d;">&gt;</span><span style="color:#323232;"> ./html
-</span><span style="color:#323232;">Press Ctrl+C to shutdown gracefully...
-</span><span style="color:#323232;">192.168.65.1 - - </span><span style="font-weight:bold;color:#a71d5d;">[</span><span style="color:#323232;">22/Feb/2026:12:00:00 +0000</span><span style="font-weight:bold;color:#a71d5d;">] </span><span style="color:#183691;">&quot;GET / HTTP/1.1&quot;</span><span style="color:#323232;"> 200 256 </span><span style="color:#183691;">&quot;-&quot; &quot;Mozilla/5.0 ...&quot;
-</span><span style="color:#323232;">192.168.65.1 - - </span><span style="font-weight:bold;color:#a71d5d;">[</span><span style="color:#323232;">22/Feb/2026:12:00:00 +0000</span><span style="font-weight:bold;color:#a71d5d;">] </span><span style="color:#183691;">&quot;GET /style.css HTTP/1.1&quot;</span><span style="color:#323232;"> 200 1024 </span><span style="color:#183691;">&quot;-&quot; &quot;Mozilla/5.0 ...&quot;
-</span><span style="color:#323232;">192.168.65.1 - - </span><span style="font-weight:bold;color:#a71d5d;">[</span><span style="color:#323232;">22/Feb/2026:12:00:01 +0000</span><span style="font-weight:bold;color:#a71d5d;">] </span><span style="color:#183691;">&quot;GET /favicon.ico HTTP/1.1&quot;</span><span style="color:#323232;"> 404 152 </span><span style="color:#183691;">&quot;-&quot; &quot;Mozilla/5.0 ...&quot;
-</span></pre>
-</div></div>
-<p><code>./my-site</code> ディレクトリの中身が、そのままポート8080で配信されます。NGINXと同じログ形式で、アクセスの様子を確認できますよ。</p>
-<h2>次のステップ</h2>
-<p>静的ファイルの配信ができるようになりましたね。HTMLやCSS、JavaScriptを配信するWebサーバーが、これだけのコードで作れます。</p>
-<p>次は、HTTPSで暗号化通信をしてみましょう。まずはTLSライブラリのセットアップからです。</p>
-<p><strong>次:</strong> <a href="../05-tls-setup">TLS Setup</a></p>
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-    <h1>TLS Setup</h1>
-    <p>ここまではHTTP（平文）でやってきましたが、実際のWebではHTTPS（暗号化通信）が当たり前ですよね。cpp-httplibでHTTPSを使うには、TLSライブラリが必要です。</p>
-<p>このTourではOpenSSLを使います。最も広く使われていて、情報も豊富です。</p>
-<h2>OpenSSLのインストール</h2>
-<p>お使いのOSに合わせてインストールしましょう。</p>
-<table><thead><tr><th>OS</th><th>インストール方法</th></tr></thead><tbody>
-<tr><td>macOS</td><td><a href="https://brew.sh/">Homebrew</a> (<code>brew install openssl</code>)</td></tr>
-<tr><td>Ubuntu / Debian</td><td><code>sudo apt install libssl-dev</code></td></tr>
-<tr><td>Windows</td><td><a href="https://vcpkg.io/">vcpkg</a> (<code>vcpkg install openssl</code>)</td></tr>
-</tbody></table>
-<h2>コンパイルオプション</h2>
-<p>TLS機能を有効にするには、<code>CPPHTTPLIB_OPENSSL_SUPPORT</code> マクロを定義してコンパイルします。前章までのコンパイルコマンドに、いくつかオプションが増えます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#65737e;"># macOS (Homebrew)
-</span><span style="color:#8fa1b3;">clang++</span><span style="color:#bf616a;"> -std</span><span style="color:#c0c5ce;">=c++17</span><span style="color:#bf616a;"> -DCPPHTTPLIB_OPENSSL_SUPPORT </span><span style="color:#c0c5ce;">\
-</span><span style="color:#bf616a;">    -I</span><span style="color:#c0c5ce;">$</span><span style="color:#bf616a;">(</span><span style="color:#8fa1b3;">brew</span><span style="color:#bf616a;"> --prefix openssl)</span><span style="color:#c0c5ce;">/include \
-</span><span style="color:#bf616a;">    -L</span><span style="color:#c0c5ce;">$</span><span style="color:#bf616a;">(</span><span style="color:#8fa1b3;">brew</span><span style="color:#bf616a;"> --prefix openssl)</span><span style="color:#c0c5ce;">/lib \
-</span><span style="color:#bf616a;">    -lssl -lcrypto </span><span style="color:#c0c5ce;">\
-</span><span style="color:#bf616a;">    -framework</span><span style="color:#c0c5ce;"> CoreFoundation</span><span style="color:#bf616a;"> -framework</span><span style="color:#c0c5ce;"> Security \
-</span><span style="color:#bf616a;">    -o</span><span style="color:#c0c5ce;"> server server.cpp
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;"># Linux
-</span><span style="color:#8fa1b3;">clang++</span><span style="color:#bf616a;"> -std</span><span style="color:#c0c5ce;">=c++17</span><span style="color:#bf616a;"> -pthread -DCPPHTTPLIB_OPENSSL_SUPPORT </span><span style="color:#c0c5ce;">\
-</span><span style="color:#bf616a;">    -lssl -lcrypto </span><span style="color:#c0c5ce;">\
-</span><span style="color:#bf616a;">    -o</span><span style="color:#c0c5ce;"> server server.cpp
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;"># Windows (Developer Command Prompt)
-</span><span style="color:#8fa1b3;">cl</span><span style="color:#c0c5ce;"> /EHsc /std:c++17 /DCPPHTTPLIB_OPENSSL_SUPPORT server.cpp libssl.lib libcrypto.lib
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-style:italic;color:#969896;"># macOS (Homebrew)
-</span><span style="color:#323232;">clang++ -std</span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;">c++17 -DCPPHTTPLIB_OPENSSL_SUPPORT \
-</span><span style="color:#323232;">    -I$(brew --prefix openssl)/include \
-</span><span style="color:#323232;">    -L$(brew --prefix openssl)/lib \
-</span><span style="color:#323232;">    -lssl -lcrypto \
-</span><span style="color:#323232;">    -framework CoreFoundation -framework Security \
-</span><span style="color:#323232;">    -o server server.cpp
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;"># Linux
-</span><span style="color:#323232;">clang++ -std</span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;">c++17 -pthread -DCPPHTTPLIB_OPENSSL_SUPPORT \
-</span><span style="color:#323232;">    -lssl -lcrypto \
-</span><span style="color:#323232;">    -o server server.cpp
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;"># Windows (Developer Command Prompt)
-</span><span style="color:#323232;">cl /EHsc /std:c++17 /DCPPHTTPLIB_OPENSSL_SUPPORT server.cpp libssl.lib libcrypto.lib
-</span></pre>
-</div></div>
-<p>それぞれのオプションの役割を見てみましょう。</p>
-<ul>
-<li><strong><code>-DCPPHTTPLIB_OPENSSL_SUPPORT</code></strong> — TLS機能を有効にするマクロ定義</li>
-<li><strong><code>-lssl -lcrypto</code></strong> — OpenSSLのライブラリをリンク</li>
-<li><strong><code>-I</code> / <code>-L</code></strong>（macOSのみ）— Homebrew版OpenSSLのパスを指定</li>
-<li><strong><code>-framework CoreFoundation -framework Security</code></strong>（macOSのみ）— Keychainからシステム証明書を自動で読み込むために必要です</li>
-</ul>
-<h2>動作確認</h2>
-<p>ちゃんと動くか確認してみましょう。<code>httplib::Client</code> にHTTPSのURLを渡してアクセスするだけのプログラムです。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#define </span><span style="color:#c0c5ce;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://www.google.com</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Status: </span><span style="color:#c0c5ce;">&quot; &lt;&lt; res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    } </span><span style="color:#b48ead;">else </span><span style="color:#c0c5ce;">{
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Error: </span><span style="color:#c0c5ce;">&quot; &lt;&lt; </span><span style="color:#8fa1b3;">httplib::to_string</span><span style="color:#c0c5ce;">(res.</span><span style="color:#8fa1b3;">error</span><span style="color:#c0c5ce;">()) &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#define </span><span style="color:#323232;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Client cli(</span><span style="color:#183691;">&quot;https://www.google.com&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Status: &quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    } </span><span style="font-weight:bold;color:#a71d5d;">else </span><span style="color:#323232;">{
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Error: &quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#323232;">httplib::to_string(res.error()) </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>コンパイルして実行してみてください。<code>Status: 200</code> と表示されれば、セットアップ完了です。</p>
-<h2>他のTLSバックエンド</h2>
-<p>cpp-httplibはOpenSSL以外にも、Mbed TLSとwolfSSLに対応しています。マクロ定義とリンクするライブラリを変えるだけで切り替えられます。</p>
-<table><thead><tr><th style="text-align: left">バックエンド</th><th style="text-align: left">マクロ定義</th><th style="text-align: left">リンクするライブラリ</th></tr></thead><tbody>
-<tr><td style="text-align: left">OpenSSL</td><td style="text-align: left"><code>CPPHTTPLIB_OPENSSL_SUPPORT</code></td><td style="text-align: left"><code>libssl</code>, <code>libcrypto</code></td></tr>
-<tr><td style="text-align: left">Mbed TLS</td><td style="text-align: left"><code>CPPHTTPLIB_MBEDTLS_SUPPORT</code></td><td style="text-align: left"><code>libmbedtls</code>, <code>libmbedx509</code>, <code>libmbedcrypto</code></td></tr>
-<tr><td style="text-align: left">wolfSSL</td><td style="text-align: left"><code>CPPHTTPLIB_WOLFSSL_SUPPORT</code></td><td style="text-align: left"><code>libwolfssl</code></td></tr>
-</tbody></table>
-<p>このTourではOpenSSLを前提に進めますが、APIはどのバックエンドでも共通です。</p>
-<h2>次のステップ</h2>
-<p>TLSの準備ができましたね。次は、HTTPSサイトにリクエストを送ってみましょう。</p>
-<p><strong>次:</strong> <a href="../06-https-client">HTTPS Client</a></p>
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-    <p>前章でOpenSSLのセットアップが済んだので、さっそくHTTPSクライアントを使ってみましょう。2章で使った <code>httplib::Client</code> がそのまま使えます。コンストラクタに <code>https://</code> 付きのURLを渡すだけです。</p>
-<h2>GETリクエスト</h2>
-<p>実在するHTTPSサイトにアクセスしてみましょう。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#define </span><span style="color:#c0c5ce;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://nghttp2.org</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;           </span><span style="color:#65737e;">// 200
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">substr</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">0</span><span style="color:#c0c5ce;">, </span><span style="color:#d08770;">100</span><span style="color:#c0c5ce;">) &lt;&lt; std::endl;  </span><span style="color:#65737e;">// HTMLの先頭部分
-</span><span style="color:#c0c5ce;">    } </span><span style="color:#b48ead;">else </span><span style="color:#c0c5ce;">{
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Error: </span><span style="color:#c0c5ce;">&quot; &lt;&lt; </span><span style="color:#8fa1b3;">httplib::to_string</span><span style="color:#c0c5ce;">(res.</span><span style="color:#8fa1b3;">error</span><span style="color:#c0c5ce;">()) &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#define </span><span style="color:#323232;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Client cli(</span><span style="color:#183691;">&quot;https://nghttp2.org&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;           </span><span style="font-style:italic;color:#969896;">// 200
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body.substr(</span><span style="color:#0086b3;">0</span><span style="color:#323232;">, </span><span style="color:#0086b3;">100</span><span style="color:#323232;">) </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// HTMLの先頭部分
-</span><span style="color:#323232;">    } </span><span style="font-weight:bold;color:#a71d5d;">else </span><span style="color:#323232;">{
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Error: &quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#323232;">httplib::to_string(res.error()) </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>2章では <code>httplib::Client cli("http://localhost:8080")</code> と書きましたよね。スキームを <code>https://</code> に変えるだけです。<code>Get()</code> や <code>Post()</code> など、2章で学んだAPIはすべてそのまま使えます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#c0c5ce;"> https://nghttp2.org/
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl https://nghttp2.org/
-</span></pre>
-</div></div>
-<h2>ポートの指定</h2>
-<p>HTTPSのデフォルトポートは443です。別のポートを使いたい場合は、URLにポートを含めます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://localhost:8443</span><span style="color:#c0c5ce;">&quot;);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://localhost:8443&quot;</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<h2>CA証明書の検証</h2>
-<p><code>httplib::Client</code> はHTTPS接続時、デフォルトでサーバー証明書を検証します。信頼できるCA（認証局）が発行した証明書を持つサーバーにしか接続しません。</p>
-<p>CA証明書は、macOSならKeychain、LinuxならシステムのCA証明書ストア、WindowsならWindowsの証明書ストアから自動で読み込みます。ほとんどの場合、追加の設定は要りません。</p>
-<h3>CA証明書ファイルの指定</h3>
-<p>環境によってはシステムのCA証明書が見つからないこともあります。そのときは <code>set_ca_cert_path()</code> でパスを直接指定してください。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://nghttp2.org</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_ca_cert_path</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/etc/ssl/certs/ca-certificates.crt</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://nghttp2.org&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_ca_cert_path(</span><span style="color:#183691;">&quot;/etc/ssl/certs/ca-certificates.crt&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">);
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> --cacert</span><span style="color:#c0c5ce;"> /etc/ssl/certs/ca-certificates.crt https://nghttp2.org/
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl --cacert /etc/ssl/certs/ca-certificates.crt https://nghttp2.org/
-</span></pre>
-</div></div>
-<h3>証明書検証の無効化</h3>
-<p>開発中、自己署名証明書のサーバーに接続したいときは、検証を無効にできます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://localhost:8443</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">enable_server_certificate_verification</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">false</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://localhost:8443&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.enable_server_certificate_verification(</span><span style="color:#0086b3;">false</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">);
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> -k</span><span style="color:#c0c5ce;"> https://localhost:8443/
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl -k https://localhost:8443/
-</span></pre>
-</div></div>
-<p>本番では絶対に無効にしないでください。中間者攻撃のリスクがあります。</p>
-<h2>リダイレクトの追跡</h2>
-<p>HTTPSサイトへのアクセスでは、リダイレクトに遭遇することがよくあります。たとえば <code>http://</code> から <code>https://</code> へ、あるいは <code>www</code> なしから <code>www</code> ありへ転送されるケースです。</p>
-<p>デフォルトではリダイレクトを追跡しません。リダイレクト先は <code>Location</code> ヘッダーで確認できます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://nghttp2.org</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/httpbin/redirect/3</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// 302
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#8fa1b3;">get_header_value</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Location</span><span style="color:#c0c5ce;">&quot;) &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://nghttp2.org&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/httpbin/redirect/3&quot;</span><span style="color:#323232;">);
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// 302
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;get_header_value(</span><span style="color:#183691;">&quot;Location&quot;</span><span style="color:#323232;">) </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#c0c5ce;"> https://nghttp2.org/httpbin/redirect/3
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl https://nghttp2.org/httpbin/redirect/3
-</span></pre>
-</div></div>
-<p><code>set_follow_location(true)</code> を設定すると、リダイレクトを自動で追跡して、最終的なレスポンスを返してくれます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://nghttp2.org</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_follow_location</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">true</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/httpbin/redirect/3</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// 200（最終的なレスポンス）
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://nghttp2.org&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_follow_location(</span><span style="color:#0086b3;">true</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/httpbin/redirect/3&quot;</span><span style="color:#323232;">);
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// 200（最終的なレスポンス）
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> -L</span><span style="color:#c0c5ce;"> https://nghttp2.org/httpbin/redirect/3
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl -L https://nghttp2.org/httpbin/redirect/3
-</span></pre>
-</div></div>
-<h2>次のステップ</h2>
-<p>HTTPSクライアントの使い方がわかりましたね。次は自分でHTTPSサーバーを立ててみましょう。自己署名証明書の作り方から始めます。</p>
-<p><strong>次:</strong> <a href="../07-https-server">HTTPS Server</a></p>
-
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-    <h1>HTTPS Server</h1>
-    <p>前章ではHTTPSクライアントを使いました。今度は自分でHTTPSサーバーを立ててみましょう。3章の <code>httplib::Server</code> を <code>httplib::SSLServer</code> に置き換えるだけです。</p>
-<p>ただし、TLSサーバーにはサーバー証明書と秘密鍵が必要です。まずはそこから準備しましょう。</p>
-<h2>自己署名証明書の作成</h2>
-<p>開発やテスト用なら、自己署名証明書（いわゆるオレオレ証明書）で十分です。OpenSSLのコマンドでサクッと作れます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">openssl</span><span style="color:#c0c5ce;"> req</span><span style="color:#bf616a;"> -x509 -noenc -keyout</span><span style="color:#c0c5ce;"> key.pem</span><span style="color:#bf616a;"> -out</span><span style="color:#c0c5ce;"> cert.pem</span><span style="color:#bf616a;"> -subj</span><span style="color:#c0c5ce;"> /CN=localhost
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">openssl req -x509 -noenc -keyout key.pem -out cert.pem -subj /CN=localhost
-</span></pre>
-</div></div>
-<p>これで2つのファイルができます。</p>
-<ul>
-<li><strong><code>cert.pem</code></strong> — サーバー証明書</li>
-<li><strong><code>key.pem</code></strong> — 秘密鍵</li>
-</ul>
-<h2>最小のHTTPSサーバー</h2>
-<p>証明書ができたら、さっそくサーバーを書いてみましょう。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#define </span><span style="color:#c0c5ce;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::SSLServer </span><span style="color:#8fa1b3;">svr</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">cert.pem</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">key.pem</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">        res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello, HTTPS!</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Listening on https://localhost:8443</span><span style="color:#c0c5ce;">&quot; &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8443</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#define </span><span style="color:#323232;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::SSLServer svr(</span><span style="color:#183691;">&quot;cert.pem&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;key.pem&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">        res.set_content(</span><span style="color:#183691;">&quot;Hello, HTTPS!&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Listening on https://localhost:8443&quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    svr.listen(</span><span style="color:#183691;">&quot;0.0.0.0&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8443</span><span style="color:#323232;">);
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p><code>httplib::SSLServer</code> のコンストラクタに証明書と秘密鍵のパスを渡すだけです。ルーティングの書き方は3章の <code>httplib::Server</code> とまったく同じですよ。</p>
-<p>コンパイルして起動しましょう。</p>
-<h2>動作確認</h2>
-<p>サーバーが起動したら、<code>curl</code> でアクセスしてみましょう。自己署名証明書なので、<code>-k</code> オプションで証明書検証をスキップします。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#8fa1b3;">curl</span><span style="color:#bf616a;"> -k</span><span style="color:#c0c5ce;"> https://localhost:8443/
-</span><span style="color:#65737e;"># Hello, HTTPS!
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">curl -k https://localhost:8443/
-</span><span style="font-style:italic;color:#969896;"># Hello, HTTPS!
-</span></pre>
-</div></div>
-<p>ブラウザで <code>https://localhost:8443</code> を開くと、「この接続は安全ではありません」と警告が出ます。自己署名証明書なので正常です。気にせず進めてください。</p>
-<h2>クライアントからの接続</h2>
-<p>前章の <code>httplib::Client</code> で接続してみましょう。自己署名証明書のサーバーに接続するには、2つの方法があります。</p>
-<h3>方法1: 証明書検証を無効にする</h3>
-<p>開発時の手軽な方法です。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#define </span><span style="color:#c0c5ce;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://localhost:8443</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    cli.</span><span style="color:#8fa1b3;">enable_server_certificate_verification</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">false</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// Hello, HTTPS!
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#define </span><span style="color:#323232;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Client cli(</span><span style="color:#183691;">&quot;https://localhost:8443&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    cli.enable_server_certificate_verification(</span><span style="color:#0086b3;">false</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// Hello, HTTPS!
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<h3>方法2: 自己署名証明書をCA証明書として指定する</h3>
-<p>こちらのほうが安全です。<code>cert.pem</code> をCA証明書として信頼するよう指定します。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#define </span><span style="color:#c0c5ce;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://localhost:8443</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    cli.</span><span style="color:#8fa1b3;">set_ca_cert_path</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">cert.pem</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(res) {
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; res-&gt;</span><span style="color:#bf616a;">body </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;  </span><span style="color:#65737e;">// Hello, HTTPS!
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#define </span><span style="color:#323232;">CPPHTTPLIB_OPENSSL_SUPPORT
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Client cli(</span><span style="color:#183691;">&quot;https://localhost:8443&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    cli.set_ca_cert_path(</span><span style="color:#183691;">&quot;cert.pem&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(res) {
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res-&gt;body </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// Hello, HTTPS!
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>この方法なら、指定した証明書のサーバーにだけ接続を許可して、なりすましを防げます。テスト環境でもなるべくこちらを使いましょう。</p>
-<h2>Server と SSLServer の比較</h2>
-<p>3章で学んだ <code>httplib::Server</code> のAPIは、<code>httplib::SSLServer</code> でもそのまま使えます。違いはコンストラクタだけです。</p>
-<table><thead><tr><th></th><th><code>httplib::Server</code></th><th><code>httplib::SSLServer</code></th></tr></thead><tbody>
-<tr><td>コンストラクタ</td><td>引数なし</td><td>証明書と秘密鍵のパス</td></tr>
-<tr><td>プロトコル</td><td>HTTP</td><td>HTTPS</td></tr>
-<tr><td>ポート（慣例）</td><td>8080</td><td>8443</td></tr>
-<tr><td>ルーティング</td><td>共通</td><td>共通</td></tr>
-</tbody></table>
-<p>HTTPサーバーをHTTPSに切り替えるには、コンストラクタを変えるだけです。</p>
-<h2>次のステップ</h2>
-<p>HTTPSサーバーが動きましたね。これでHTTP/HTTPSのクライアントとサーバー、両方の基本がそろいました。</p>
-<p>次は、cpp-httplibに新しく加わったWebSocket機能を見てみましょう。</p>
-<p><strong>次:</strong> <a href="../08-websocket">WebSocket</a></p>
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-  <article>
-    <h1>WebSocket</h1>
-    <p>cpp-httplibはWebSocketにも対応しています。HTTPのリクエスト/レスポンスと違い、WebSocketはサーバーとクライアントが双方向にメッセージをやり取りできます。チャットやリアルタイム通知に便利です。</p>
-<p>さっそく、エコーサーバーとクライアントを作ってみましょう。</p>
-<h2>エコーサーバー</h2>
-<p>受け取ったメッセージをそのまま返すエコーサーバーです。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::Server svr;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">WebSocket</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/ws</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const</span><span style="color:#c0c5ce;"> httplib::Request &amp;, httplib::ws::WebSocket &amp;ws) {
-</span><span style="color:#c0c5ce;">        std::string msg;
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">while </span><span style="color:#c0c5ce;">(ws.</span><span style="color:#8fa1b3;">read</span><span style="color:#c0c5ce;">(msg)) {
-</span><span style="color:#c0c5ce;">            ws.</span><span style="color:#8fa1b3;">send</span><span style="color:#c0c5ce;">(msg);  </span><span style="color:#65737e;">// 受け取ったメッセージをそのまま返す
-</span><span style="color:#c0c5ce;">        }
-</span><span style="color:#c0c5ce;">    });
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Listening on port 8080...</span><span style="color:#c0c5ce;">&quot; &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">    svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8080</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::Server svr;
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    svr.WebSocket(</span><span style="color:#183691;">&quot;/ws&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const</span><span style="color:#323232;"> httplib::Request </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">, httplib::ws::WebSocket </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">ws) {
-</span><span style="color:#323232;">        std::string msg;
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">while </span><span style="color:#323232;">(ws.read(msg)) {
-</span><span style="color:#323232;">            ws.send(msg);  </span><span style="font-style:italic;color:#969896;">// 受け取ったメッセージをそのまま返す
-</span><span style="color:#323232;">        }
-</span><span style="color:#323232;">    });
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Listening on port 8080...&quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">    svr.listen(</span><span style="color:#183691;">&quot;0.0.0.0&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8080</span><span style="color:#323232;">);
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p><code>svr.WebSocket()</code> でWebSocketハンドラーを登録します。3章の <code>svr.Get()</code> や <code>svr.Post()</code> と同じ感覚ですね。</p>
-<p>ハンドラーの中では、<code>ws.read(msg)</code> でメッセージを待ちます。接続が閉じられると <code>read()</code> が <code>false</code> を返すので、ループを抜けます。<code>ws.send(msg)</code> でメッセージを送り返します。</p>
-<h2>クライアントからの接続</h2>
-<p><code>httplib::ws::WebSocketClient</code> を使ってサーバーに接続してみましょう。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&quot;</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#c0c5ce;">&quot;
-</span><span style="color:#b48ead;">#include </span><span style="color:#c0c5ce;">&lt;</span><span style="color:#a3be8c;">iostream</span><span style="color:#c0c5ce;">&gt;
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#c0c5ce;">() {
-</span><span style="color:#c0c5ce;">    httplib::ws::WebSocketClient </span><span style="color:#8fa1b3;">client</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">ws://localhost:8080/ws</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(!client.</span><span style="color:#8fa1b3;">connect</span><span style="color:#c0c5ce;">()) {
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; &quot;</span><span style="color:#a3be8c;">Connection failed</span><span style="color:#c0c5ce;">&quot; &lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">return </span><span style="color:#d08770;">1</span><span style="color:#c0c5ce;">;
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// メッセージを送信
-</span><span style="color:#c0c5ce;">    client.</span><span style="color:#8fa1b3;">send</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello, WebSocket!</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// サーバーからの応答を受信
-</span><span style="color:#c0c5ce;">    std::string msg;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(client.</span><span style="color:#8fa1b3;">read</span><span style="color:#c0c5ce;">(msg)) {
-</span><span style="color:#c0c5ce;">        std::cout &lt;&lt; msg &lt;&lt; std::endl;  </span><span style="color:#65737e;">// Hello, WebSocket!
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    client.</span><span style="color:#8fa1b3;">close</span><span style="color:#c0c5ce;">();
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&quot;httplib.h&quot;
-</span><span style="font-weight:bold;color:#a71d5d;">#include </span><span style="color:#183691;">&lt;iostream&gt;
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">int </span><span style="font-weight:bold;color:#795da3;">main</span><span style="color:#323232;">() {
-</span><span style="color:#323232;">    httplib::ws::WebSocketClient client(</span><span style="color:#183691;">&quot;ws://localhost:8080/ws&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(</span><span style="font-weight:bold;color:#a71d5d;">!</span><span style="color:#323232;">client.connect()) {
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;Connection failed&quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">return </span><span style="color:#0086b3;">1</span><span style="color:#323232;">;
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// メッセージを送信
-</span><span style="color:#323232;">    client.send(</span><span style="color:#183691;">&quot;Hello, WebSocket!&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// サーバーからの応答を受信
-</span><span style="color:#323232;">    std::string msg;
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(client.read(msg)) {
-</span><span style="color:#323232;">        std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> msg </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;  </span><span style="font-style:italic;color:#969896;">// Hello, WebSocket!
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    client.close();
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p>コンストラクタには <code>ws://host:port/path</code> 形式のURLを渡します。<code>connect()</code> で接続を開始し、<code>send()</code> と <code>read()</code> でメッセージをやり取りします。</p>
-<h2>テキストとバイナリ</h2>
-<p>WebSocketにはテキストとバイナリの2種類のメッセージがあります。<code>read()</code> の戻り値で区別できます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">WebSocket</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/ws</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const</span><span style="color:#c0c5ce;"> httplib::Request &amp;, httplib::ws::WebSocket &amp;ws) {
-</span><span style="color:#c0c5ce;">    std::string msg;
-</span><span style="color:#c0c5ce;">    httplib::ws::ReadResult ret;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">while </span><span style="color:#c0c5ce;">((ret = ws.</span><span style="color:#8fa1b3;">read</span><span style="color:#c0c5ce;">(msg))) {
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(ret == httplib::ws::Binary) {
-</span><span style="color:#c0c5ce;">            ws.</span><span style="color:#8fa1b3;">send</span><span style="color:#c0c5ce;">(msg.</span><span style="color:#8fa1b3;">data</span><span style="color:#c0c5ce;">(), msg.</span><span style="color:#8fa1b3;">size</span><span style="color:#c0c5ce;">());  </span><span style="color:#65737e;">// バイナリとして送信
-</span><span style="color:#c0c5ce;">        } </span><span style="color:#b48ead;">else </span><span style="color:#c0c5ce;">{
-</span><span style="color:#c0c5ce;">            ws.</span><span style="color:#8fa1b3;">send</span><span style="color:#c0c5ce;">(msg);  </span><span style="color:#65737e;">// テキストとして送信
-</span><span style="color:#c0c5ce;">        }
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.WebSocket(</span><span style="color:#183691;">&quot;/ws&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const</span><span style="color:#323232;"> httplib::Request </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">, httplib::ws::WebSocket </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">ws) {
-</span><span style="color:#323232;">    std::string msg;
-</span><span style="color:#323232;">    httplib::ws::ReadResult ret;
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">while </span><span style="color:#323232;">((ret </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> ws.read(msg))) {
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(ret </span><span style="font-weight:bold;color:#a71d5d;">==</span><span style="color:#323232;"> httplib::ws::Binary) {
-</span><span style="color:#323232;">            ws.send(msg.data(), msg.size());  </span><span style="font-style:italic;color:#969896;">// バイナリとして送信
-</span><span style="color:#323232;">        } </span><span style="font-weight:bold;color:#a71d5d;">else </span><span style="color:#323232;">{
-</span><span style="color:#323232;">            ws.send(msg);  </span><span style="font-style:italic;color:#969896;">// テキストとして送信
-</span><span style="color:#323232;">        }
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<ul>
-<li><code>ws.send(const std::string &amp;)</code> — テキストメッセージとして送信</li>
-<li><code>ws.send(const char *, size_t)</code> — バイナリメッセージとして送信</li>
-</ul>
-<p>クライアント側も同じAPIです。</p>
-<h2>リクエスト情報へのアクセス</h2>
-<p>ハンドラーの第1引数 <code>req</code> から、ハンドシェイク時のHTTPリクエスト情報を読み取れます。認証トークンの確認などに便利です。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">WebSocket</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/ws</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const</span><span style="color:#c0c5ce;"> httplib::Request &amp;req, httplib::ws::WebSocket &amp;ws) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> token = req.</span><span style="color:#8fa1b3;">get_header_value</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Authorization</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(token.</span><span style="color:#8fa1b3;">empty</span><span style="color:#c0c5ce;">()) {
-</span><span style="color:#c0c5ce;">        ws.</span><span style="color:#8fa1b3;">close</span><span style="color:#c0c5ce;">(httplib::ws::CloseStatus::PolicyViolation, &quot;</span><span style="color:#a3be8c;">unauthorized</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">        </span><span style="color:#b48ead;">return</span><span style="color:#c0c5ce;">;
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">    std::string msg;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">while </span><span style="color:#c0c5ce;">(ws.</span><span style="color:#8fa1b3;">read</span><span style="color:#c0c5ce;">(msg)) {
-</span><span style="color:#c0c5ce;">        ws.</span><span style="color:#8fa1b3;">send</span><span style="color:#c0c5ce;">(msg);
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.WebSocket(</span><span style="color:#183691;">&quot;/ws&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const</span><span style="color:#323232;"> httplib::Request </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">req, httplib::ws::WebSocket </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">ws) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> token </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> req.get_header_value(</span><span style="color:#183691;">&quot;Authorization&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(token.empty()) {
-</span><span style="color:#323232;">        ws.close(httplib::ws::CloseStatus::PolicyViolation, </span><span style="color:#183691;">&quot;unauthorized&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">        </span><span style="font-weight:bold;color:#a71d5d;">return</span><span style="color:#323232;">;
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">    std::string msg;
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">while </span><span style="color:#323232;">(ws.read(msg)) {
-</span><span style="color:#323232;">        ws.send(msg);
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h2>WSSで使う</h2>
-<p>HTTPS上のWebSocket（WSS）にも対応しています。サーバー側は <code>httplib::SSLServer</code> にWebSocketハンドラーを登録するだけです。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::SSLServer </span><span style="color:#8fa1b3;">svr</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">cert.pem</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">key.pem</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">WebSocket</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/ws</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const</span><span style="color:#c0c5ce;"> httplib::Request &amp;, httplib::ws::WebSocket &amp;ws) {
-</span><span style="color:#c0c5ce;">    std::string msg;
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">while </span><span style="color:#c0c5ce;">(ws.</span><span style="color:#8fa1b3;">read</span><span style="color:#c0c5ce;">(msg)) {
-</span><span style="color:#c0c5ce;">        ws.</span><span style="color:#8fa1b3;">send</span><span style="color:#c0c5ce;">(msg);
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8443</span><span style="color:#c0c5ce;">);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::SSLServer </span><span style="font-weight:bold;color:#795da3;">svr</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;cert.pem&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;key.pem&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">svr.WebSocket(</span><span style="color:#183691;">&quot;/ws&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const</span><span style="color:#323232;"> httplib::Request </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">, httplib::ws::WebSocket </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">ws) {
-</span><span style="color:#323232;">    std::string msg;
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">while </span><span style="color:#323232;">(ws.read(msg)) {
-</span><span style="color:#323232;">        ws.send(msg);
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">});
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">svr.listen(</span><span style="color:#183691;">&quot;0.0.0.0&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8443</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<p>クライアント側は <code>wss://</code> スキームを使います。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::ws::WebSocketClient </span><span style="color:#8fa1b3;">client</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">wss://localhost:8443/ws</span><span style="color:#c0c5ce;">&quot;);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::ws::WebSocketClient </span><span style="font-weight:bold;color:#795da3;">client</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;wss://localhost:8443/ws&quot;</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<h2>次のステップ</h2>
-<p>WebSocketの基本がわかりましたね。ここまでで Tourは終わりです。</p>
-<p>次のページでは、Tourで取り上げなかった機能をまとめて紹介します。</p>
-<p><strong>次:</strong> <a href="../09-whats-next">What's Next</a></p>
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-    <p>Tourお疲れさまでした！ cpp-httplibの基本はひと通り押さえましたね。でも、まだまだ便利な機能があります。Tourで取り上げなかった機能をカテゴリー別に紹介します。</p>
-<h2>Streaming API</h2>
-<p>LLMのストリーミング応答や大きなファイルのダウンロードでは、レスポンス全体をメモリに載せたくないですよね。<code>stream::Get()</code> を使えば、データをチャンクごとに処理できます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">http://localhost:11434</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> result = </span><span style="color:#8fa1b3;">httplib::stream::Get</span><span style="color:#c0c5ce;">(cli, &quot;</span><span style="color:#a3be8c;">/api/generate</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">if </span><span style="color:#c0c5ce;">(result) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">while </span><span style="color:#c0c5ce;">(result.</span><span style="color:#8fa1b3;">next</span><span style="color:#c0c5ce;">()) {
-</span><span style="color:#c0c5ce;">        std::cout.</span><span style="color:#8fa1b3;">write</span><span style="color:#c0c5ce;">(result.</span><span style="color:#8fa1b3;">data</span><span style="color:#c0c5ce;">(), result.</span><span style="color:#8fa1b3;">size</span><span style="color:#c0c5ce;">());
-</span><span style="color:#c0c5ce;">    }
-</span><span style="color:#c0c5ce;">}
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;http://localhost:11434&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> result </span><span style="font-weight:bold;color:#a71d5d;">= </span><span style="color:#323232;">httplib::stream::Get(cli, </span><span style="color:#183691;">&quot;/api/generate&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">if </span><span style="color:#323232;">(result) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">while </span><span style="color:#323232;">(result.next()) {
-</span><span style="color:#323232;">        std::cout.write(result.data(), result.size());
-</span><span style="color:#323232;">    }
-</span><span style="color:#323232;">}
-</span></pre>
-</div></div>
-<p><code>Get()</code> に <code>content_receiver</code> コールバックを渡す方法もあります。こちらはKeep-Aliveと併用できます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">http://localhost:8080</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/stream</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const char </span><span style="color:#c0c5ce;">*data, size_t len) {
-</span><span style="color:#c0c5ce;">    std::cout.</span><span style="color:#8fa1b3;">write</span><span style="color:#c0c5ce;">(data, len);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">return </span><span style="color:#d08770;">true</span><span style="color:#c0c5ce;">;
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;http://localhost:8080&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">cli.Get(</span><span style="color:#183691;">&quot;/stream&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const char *</span><span style="color:#323232;">data, </span><span style="color:#0086b3;">size_t</span><span style="color:#323232;"> len) {
-</span><span style="color:#323232;">    std::cout.write(data, len);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">return </span><span style="color:#0086b3;">true</span><span style="color:#323232;">;
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>サーバー側には <code>set_content_provider()</code> と <code>set_chunked_content_provider()</code> があります。サイズがわかっているなら前者、不明なら後者を使ってください。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#65737e;">// サイズ指定あり（Content-Length が設定される）
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/file</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> size = </span><span style="color:#8fa1b3;">get_file_size</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">large.bin</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content_provider</span><span style="color:#c0c5ce;">(size, &quot;</span><span style="color:#a3be8c;">application/octet-stream</span><span style="color:#c0c5ce;">&quot;,
-</span><span style="color:#c0c5ce;">        [](size_t offset, size_t length, httplib::DataSink &amp;sink) {
-</span><span style="color:#c0c5ce;">            </span><span style="color:#65737e;">// offset から length バイト分を送る
-</span><span style="color:#c0c5ce;">            </span><span style="color:#b48ead;">return </span><span style="color:#d08770;">true</span><span style="color:#c0c5ce;">;
-</span><span style="color:#c0c5ce;">        });
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#65737e;">// サイズ不明（Chunked Transfer Encoding）
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/stream</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_chunked_content_provider</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;,
-</span><span style="color:#c0c5ce;">        [](size_t offset, httplib::DataSink &amp;sink) {
-</span><span style="color:#c0c5ce;">            sink.</span><span style="color:#8fa1b3;">write</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">chunk</span><span style="color:#96b5b4;">\n</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">6</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">            </span><span style="color:#b48ead;">return </span><span style="color:#d08770;">true</span><span style="color:#c0c5ce;">;  </span><span style="color:#65737e;">// falseを返すと終了
-</span><span style="color:#c0c5ce;">        });
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-style:italic;color:#969896;">// サイズ指定あり（Content-Length が設定される）
-</span><span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/file&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> size </span><span style="font-weight:bold;color:#a71d5d;">= </span><span style="color:#323232;">get_file_size(</span><span style="color:#183691;">&quot;large.bin&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    res.set_content_provider(size, </span><span style="color:#183691;">&quot;application/octet-stream&quot;</span><span style="color:#323232;">,
-</span><span style="color:#323232;">        [](</span><span style="color:#0086b3;">size_t</span><span style="color:#323232;"> offset, </span><span style="color:#0086b3;">size_t</span><span style="color:#323232;"> length, httplib::DataSink </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">sink) {
-</span><span style="color:#323232;">            </span><span style="font-style:italic;color:#969896;">// offset から length バイト分を送る
-</span><span style="color:#323232;">            </span><span style="font-weight:bold;color:#a71d5d;">return </span><span style="color:#0086b3;">true</span><span style="color:#323232;">;
-</span><span style="color:#323232;">        });
-</span><span style="color:#323232;">});
-</span><span style="color:#323232;">
-</span><span style="font-style:italic;color:#969896;">// サイズ不明（Chunked Transfer Encoding）
-</span><span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/stream&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_chunked_content_provider(</span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">,
-</span><span style="color:#323232;">        [](</span><span style="color:#0086b3;">size_t</span><span style="color:#323232;"> offset, httplib::DataSink </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">sink) {
-</span><span style="color:#323232;">            sink.write(</span><span style="color:#183691;">&quot;chunk</span><span style="color:#0086b3;">\n</span><span style="color:#183691;">&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">6</span><span style="color:#323232;">);
-</span><span style="color:#323232;">            </span><span style="font-weight:bold;color:#a71d5d;">return </span><span style="color:#0086b3;">true</span><span style="color:#323232;">;  </span><span style="font-style:italic;color:#969896;">// falseを返すと終了
-</span><span style="color:#323232;">        });
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>大きなファイルのアップロードには <code>make_file_provider()</code> が便利です。ファイルを全部メモリに読み込まず、ストリーミングで送れます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">http://localhost:8080</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Post</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/upload</span><span style="color:#c0c5ce;">&quot;, {}, {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#8fa1b3;">httplib::make_file_provider</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">file</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">/path/to/large-file.zip</span><span style="color:#c0c5ce;">&quot;)
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;http://localhost:8080&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Post(</span><span style="color:#183691;">&quot;/upload&quot;</span><span style="color:#323232;">, {}, {
-</span><span style="color:#323232;">    httplib::make_file_provider(</span><span style="color:#183691;">&quot;file&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;/path/to/large-file.zip&quot;</span><span style="color:#323232;">)
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h2>Server-Sent Events (SSE)</h2>
-<p>SSEクライアントも用意しています。自動再接続や <code>Last-Event-ID</code> による再開にも対応しています。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">http://localhost:8080</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">httplib::sse::SSEClient </span><span style="color:#8fa1b3;">sse</span><span style="color:#c0c5ce;">(</span><span style="color:#bf616a;">cli</span><span style="color:#c0c5ce;">, &quot;</span><span style="color:#a3be8c;">/events</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">sse.</span><span style="color:#8fa1b3;">on_message</span><span style="color:#c0c5ce;">([](</span><span style="color:#b48ead;">const</span><span style="color:#c0c5ce;"> httplib::sse::SSEMessage &amp;msg) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; msg.</span><span style="color:#bf616a;">event </span><span style="color:#c0c5ce;">&lt;&lt; &quot;</span><span style="color:#a3be8c;">: </span><span style="color:#c0c5ce;">&quot; &lt;&lt; msg.</span><span style="color:#bf616a;">data </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">sse.</span><span style="color:#8fa1b3;">start</span><span style="color:#c0c5ce;">();  </span><span style="color:#65737e;">// ブロッキング、自動再接続あり
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;http://localhost:8080&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">httplib::sse::SSEClient </span><span style="font-weight:bold;color:#795da3;">sse</span><span style="color:#323232;">(cli, </span><span style="color:#183691;">&quot;/events&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">sse.on_message([](</span><span style="font-weight:bold;color:#a71d5d;">const</span><span style="color:#323232;"> httplib::sse::SSEMessage </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">msg) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> msg.event </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot;: &quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> msg.data </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">});
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">sse.start();  </span><span style="font-style:italic;color:#969896;">// ブロッキング、自動再接続あり
-</span></pre>
-</div></div>
-<p>イベントタイプごとにハンドラーを分けることもできますよ。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">sse.</span><span style="color:#8fa1b3;">on_event</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">update</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const</span><span style="color:#c0c5ce;"> httplib::sse::SSEMessage &amp;msg) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// &quot;update&quot; イベントだけ処理
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">sse.on_event(</span><span style="color:#183691;">&quot;update&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const</span><span style="color:#323232;"> httplib::sse::SSEMessage </span><span style="font-weight:bold;color:#a71d5d;">&amp;</span><span style="color:#323232;">msg) {
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// &quot;update&quot; イベントだけ処理
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h2>認証</h2>
-<p>クライアントにはBasic認証、Bearer Token認証、Digest認証のヘルパーを用意しています。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://api.example.com</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_basic_auth</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">user</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">password</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_bearer_token_auth</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">my-token</span><span style="color:#c0c5ce;">&quot;);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://api.example.com&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_basic_auth(</span><span style="color:#183691;">&quot;user&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;password&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_bearer_token_auth(</span><span style="color:#183691;">&quot;my-token&quot;</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<h2>圧縮</h2>
-<p>gzip、Brotli、Zstandardによる圧縮・展開に対応しています。使いたい方式のマクロを定義してコンパイルしましょう。</p>
-<table><thead><tr><th>圧縮方式</th><th>マクロ定義</th></tr></thead><tbody>
-<tr><td>gzip</td><td><code>CPPHTTPLIB_ZLIB_SUPPORT</code></td></tr>
-<tr><td>Brotli</td><td><code>CPPHTTPLIB_BROTLI_SUPPORT</code></td></tr>
-<tr><td>Zstandard</td><td><code>CPPHTTPLIB_ZSTD_SUPPORT</code></td></tr>
-</tbody></table>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://example.com</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_compress</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">true</span><span style="color:#c0c5ce;">);    </span><span style="color:#65737e;">// リクエストボディを圧縮
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_decompress</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">true</span><span style="color:#c0c5ce;">);  </span><span style="color:#65737e;">// レスポンスボディを展開
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://example.com&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_compress(</span><span style="color:#0086b3;">true</span><span style="color:#323232;">);    </span><span style="font-style:italic;color:#969896;">// リクエストボディを圧縮
-</span><span style="color:#323232;">cli.set_decompress(</span><span style="color:#0086b3;">true</span><span style="color:#323232;">);  </span><span style="font-style:italic;color:#969896;">// レスポンスボディを展開
-</span></pre>
-</div></div>
-<h2>プロキシ</h2>
-<p>HTTPプロキシ経由で接続できます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://example.com</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_proxy</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">proxy.example.com</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">8080</span><span style="color:#c0c5ce;">);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_proxy_basic_auth</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">user</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">password</span><span style="color:#c0c5ce;">&quot;);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://example.com&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_proxy(</span><span style="color:#183691;">&quot;proxy.example.com&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">8080</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_proxy_basic_auth(</span><span style="color:#183691;">&quot;user&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;password&quot;</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<h2>タイムアウト</h2>
-<p>接続・読み取り・書き込みのタイムアウトを個別に設定できます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://example.com</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_connection_timeout</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">5</span><span style="color:#c0c5ce;">, </span><span style="color:#d08770;">0</span><span style="color:#c0c5ce;">);  </span><span style="color:#65737e;">// 5秒
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_read_timeout</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">10</span><span style="color:#c0c5ce;">, </span><span style="color:#d08770;">0</span><span style="color:#c0c5ce;">);       </span><span style="color:#65737e;">// 10秒
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_write_timeout</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">10</span><span style="color:#c0c5ce;">, </span><span style="color:#d08770;">0</span><span style="color:#c0c5ce;">);      </span><span style="color:#65737e;">// 10秒
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://example.com&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_connection_timeout(</span><span style="color:#0086b3;">5</span><span style="color:#323232;">, </span><span style="color:#0086b3;">0</span><span style="color:#323232;">);  </span><span style="font-style:italic;color:#969896;">// 5秒
-</span><span style="color:#323232;">cli.set_read_timeout(</span><span style="color:#0086b3;">10</span><span style="color:#323232;">, </span><span style="color:#0086b3;">0</span><span style="color:#323232;">);       </span><span style="font-style:italic;color:#969896;">// 10秒
-</span><span style="color:#323232;">cli.set_write_timeout(</span><span style="color:#0086b3;">10</span><span style="color:#323232;">, </span><span style="color:#0086b3;">0</span><span style="color:#323232;">);      </span><span style="font-style:italic;color:#969896;">// 10秒
-</span></pre>
-</div></div>
-<h2>Keep-Alive</h2>
-<p>同じサーバーに何度もリクエストするなら、Keep-Aliveを有効にしましょう。TCP接続を再利用するので効率的です。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">https://example.com</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_keep_alive</span><span style="color:#c0c5ce;">(</span><span style="color:#d08770;">true</span><span style="color:#c0c5ce;">);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;https://example.com&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_keep_alive(</span><span style="color:#0086b3;">true</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<h2>サーバーのミドルウェア</h2>
-<p>リクエスト処理の前後にフックを挟めます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_pre_routing_handler</span><span style="color:#c0c5ce;">([](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// すべてのリクエストの前に実行される
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">return</span><span style="color:#c0c5ce;"> httplib::Server::HandlerResponse::Unhandled;  </span><span style="color:#65737e;">// 通常のルーティングに進む
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_post_routing_handler</span><span style="color:#c0c5ce;">([](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#65737e;">// レスポンスが返された後に実行される
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_header</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">X-Server</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">cpp-httplib</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.set_pre_routing_handler([](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// すべてのリクエストの前に実行される
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">return</span><span style="color:#323232;"> httplib::Server::HandlerResponse::Unhandled;  </span><span style="font-style:italic;color:#969896;">// 通常のルーティングに進む
-</span><span style="color:#323232;">});
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">svr.set_post_routing_handler([](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-style:italic;color:#969896;">// レスポンスが返された後に実行される
-</span><span style="color:#323232;">    res.set_header(</span><span style="color:#183691;">&quot;X-Server&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;cpp-httplib&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p><code>req.user_data</code> を使うと、ミドルウェアからハンドラーにデータを渡せます。認証トークンのデコード結果を共有するときに便利です。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_pre_routing_handler</span><span style="color:#c0c5ce;">([](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    req.</span><span style="color:#bf616a;">user_data</span><span style="color:#c0c5ce;">[&quot;</span><span style="color:#a3be8c;">auth_user</span><span style="color:#c0c5ce;">&quot;] = </span><span style="color:#8fa1b3;">std::string</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">alice</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">return</span><span style="color:#c0c5ce;"> httplib::Server::HandlerResponse::Unhandled;
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/me</span><span style="color:#c0c5ce;">&quot;, [](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    </span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> user = std::</span><span style="color:#8fa1b3;">any_cast</span><span style="color:#c0c5ce;">&lt;std::string&gt;(req.</span><span style="color:#bf616a;">user_data</span><span style="color:#c0c5ce;">.</span><span style="color:#8fa1b3;">at</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">auth_user</span><span style="color:#c0c5ce;">&quot;));
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Hello, </span><span style="color:#c0c5ce;">&quot; + user, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.set_pre_routing_handler([](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    req.user_data[</span><span style="color:#183691;">&quot;auth_user&quot;</span><span style="color:#323232;">] </span><span style="font-weight:bold;color:#a71d5d;">= </span><span style="color:#323232;">std::string(</span><span style="color:#183691;">&quot;alice&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">return</span><span style="color:#323232;"> httplib::Server::HandlerResponse::Unhandled;
-</span><span style="color:#323232;">});
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">svr.Get(</span><span style="color:#183691;">&quot;/me&quot;</span><span style="color:#323232;">, [](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    </span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> user </span><span style="font-weight:bold;color:#a71d5d;">= </span><span style="color:#323232;">std::any_cast&lt;std::string&gt;(req.user_data.at(</span><span style="color:#183691;">&quot;auth_user&quot;</span><span style="color:#323232;">));
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Hello, &quot; </span><span style="font-weight:bold;color:#a71d5d;">+</span><span style="color:#323232;"> user, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<p>エラーや例外のハンドラーもカスタマイズできますよ。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_error_handler</span><span style="color:#c0c5ce;">([](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Custom Error Page</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/html</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_exception_handler</span><span style="color:#c0c5ce;">([](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">auto </span><span style="color:#c0c5ce;">&amp;res, std::exception_ptr ep) {
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">= </span><span style="color:#d08770;">500</span><span style="color:#c0c5ce;">;
-</span><span style="color:#c0c5ce;">    res.</span><span style="color:#8fa1b3;">set_content</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">Internal Server Error</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">text/plain</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.set_error_handler([](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Custom Error Page&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/html&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span><span style="color:#323232;">
-</span><span style="color:#323232;">svr.set_exception_handler([](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">auto &amp;</span><span style="color:#323232;">res, std::exception_ptr ep) {
-</span><span style="color:#323232;">    res.status </span><span style="font-weight:bold;color:#a71d5d;">= </span><span style="color:#0086b3;">500</span><span style="color:#323232;">;
-</span><span style="color:#323232;">    res.set_content(</span><span style="color:#183691;">&quot;Internal Server Error&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;text/plain&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h2>ロギング</h2>
-<p>サーバーでもクライアントでもロガーを設定できます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_logger</span><span style="color:#c0c5ce;">([](</span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;req, </span><span style="color:#b48ead;">const auto </span><span style="color:#c0c5ce;">&amp;res) {
-</span><span style="color:#c0c5ce;">    std::cout &lt;&lt; req.</span><span style="color:#bf616a;">method </span><span style="color:#c0c5ce;">&lt;&lt; &quot; &quot; &lt;&lt; req.</span><span style="color:#bf616a;">path </span><span style="color:#c0c5ce;">&lt;&lt; &quot; &quot; &lt;&lt; res.</span><span style="color:#bf616a;">status </span><span style="color:#c0c5ce;">&lt;&lt; std::endl;
-</span><span style="color:#c0c5ce;">});
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="color:#323232;">svr.set_logger([](</span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">req, </span><span style="font-weight:bold;color:#a71d5d;">const auto &amp;</span><span style="color:#323232;">res) {
-</span><span style="color:#323232;">    std::cout </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> req.method </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot; &quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> req.path </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt; </span><span style="color:#183691;">&quot; &quot; </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> res.status </span><span style="font-weight:bold;color:#a71d5d;">&lt;&lt;</span><span style="color:#323232;"> std::endl;
-</span><span style="color:#323232;">});
-</span></pre>
-</div></div>
-<h2>Unix Domain Socket</h2>
-<p>TCP以外に、Unix Domain Socketでの通信にも対応しています。同じマシン上のプロセス間通信に使えます。</p>
-<div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#65737e;">// サーバー
-</span><span style="color:#c0c5ce;">httplib::Server svr;
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">set_address_family</span><span style="color:#c0c5ce;">(AF_UNIX);
-</span><span style="color:#c0c5ce;">svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/tmp/httplib.sock</span><span style="color:#c0c5ce;">&quot;, </span><span style="color:#d08770;">0</span><span style="color:#c0c5ce;">);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-style:italic;color:#969896;">// サーバー
-</span><span style="color:#323232;">httplib::Server svr;
-</span><span style="color:#323232;">svr.set_address_family(AF_UNIX);
-</span><span style="color:#323232;">svr.listen(</span><span style="color:#183691;">&quot;/tmp/httplib.sock&quot;</span><span style="color:#323232;">, </span><span style="color:#0086b3;">0</span><span style="color:#323232;">);
-</span></pre>
-</div></div><div class="code-block-wrapper"><div data-code-theme="dark"><pre style="background-color:#2b303b;">
-<span style="color:#65737e;">// クライアント
-</span><span style="color:#c0c5ce;">httplib::Client </span><span style="color:#8fa1b3;">cli</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">http://localhost</span><span style="color:#c0c5ce;">&quot;);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_address_family</span><span style="color:#c0c5ce;">(AF_UNIX);
-</span><span style="color:#c0c5ce;">cli.</span><span style="color:#8fa1b3;">set_hostname_addr_map</span><span style="color:#c0c5ce;">({{&quot;</span><span style="color:#a3be8c;">localhost</span><span style="color:#c0c5ce;">&quot;, &quot;</span><span style="color:#a3be8c;">/tmp/httplib.sock</span><span style="color:#c0c5ce;">&quot;}});
-</span><span style="color:#c0c5ce;">
-</span><span style="color:#b48ead;">auto</span><span style="color:#c0c5ce;"> res = cli.</span><span style="color:#8fa1b3;">Get</span><span style="color:#c0c5ce;">(&quot;</span><span style="color:#a3be8c;">/</span><span style="color:#c0c5ce;">&quot;);
-</span></pre>
-</div><div data-code-theme="light"><pre style="background-color:#ffffff;">
-<span style="font-style:italic;color:#969896;">// クライアント
-</span><span style="color:#323232;">httplib::Client </span><span style="font-weight:bold;color:#795da3;">cli</span><span style="color:#323232;">(</span><span style="color:#183691;">&quot;http://localhost&quot;</span><span style="color:#323232;">);
-</span><span style="color:#323232;">cli.set_address_family(AF_UNIX);
-</span><span style="color:#323232;">cli.set_hostname_addr_map({{</span><span style="color:#183691;">&quot;localhost&quot;</span><span style="color:#323232;">, </span><span style="color:#183691;">&quot;/tmp/httplib.sock&quot;</span><span style="color:#323232;">}});
-</span><span style="color:#323232;">
-</span><span style="font-weight:bold;color:#a71d5d;">auto</span><span style="color:#323232;"> res </span><span style="font-weight:bold;color:#a71d5d;">=</span><span style="color:#323232;"> cli.Get(</span><span style="color:#183691;">&quot;/&quot;</span><span style="color:#323232;">);
-</span></pre>
-</div></div>
-<h2>さらに詳しく</h2>
-<p>もっと詳しく知りたいときは、以下を参照してください。</p>
-<ul>
-<li>Cookbook — よくあるユースケースのレシピ集</li>
-<li><a href="https://github.com/yhirose/cpp-httplib/blob/master/README.md">README</a> — 全APIのリファレンス</li>
-<li><a href="https://github.com/yhirose/cpp-httplib/blob/master/README-sse.md">README-sse</a> — Server-Sent Eventsの使い方</li>
-<li><a href="https://github.com/yhirose/cpp-httplib/blob/master/README-stream.md">README-stream</a> — Streaming APIの使い方</li>
-<li><a href="https://github.com/yhirose/cpp-httplib/blob/master/README-websocket.md">README-websocket</a> — WebSocketサーバーの使い方</li>
-</ul>
-
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