ded/cpp-httplib
1
0
Fork 0
mirror of https://github.com/yhirose/cpp-httplib.git synced 2026-04-12 19:58:29 +00:00
Code Issues Packages Projects Releases Wiki Activity
Files
de296af3eb5b0d5c116470e033db900e4812c5e6
cpp-httplib/docs/ja/tour/06-https-client/index.html
yhirose 41899acece Release v0.36.0
2026-03-02 21:56:38 -05:00

288 lines
25 KiB
HTML
Raw Blame History

This file contains ambiguous Unicode characters
This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.
<!DOCTYPE html>
<html lang="ja" data-base-path="&#x2F;cpp-httplib">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>HTTPS Client - 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/ja/" 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/ja/">
<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/ja/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>
JA
</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>
<div class="layout has-sidebar">
<aside class="sidebar">
<nav class="sidebar-nav">
<div class="nav-section">
<a href="&#x2F;cpp-httplib&#x2F;ja&#x2F;tour&#x2F;" class="nav-section-title active">A Tour of cpp-httplib</a>
<ul class="nav-list">
<li><a href="&#x2F;cpp-httplib&#x2F;ja&#x2F;tour&#x2F;01-getting-started&#x2F;" class="">Getting Started</a></li>
<li><a href="&#x2F;cpp-httplib&#x2F;ja&#x2F;tour&#x2F;02-basic-client&#x2F;" class="">Basic Client</a></li>
<li><a href="&#x2F;cpp-httplib&#x2F;ja&#x2F;tour&#x2F;03-basic-server&#x2F;" class="">Basic Server</a></li>
<li><a href="&#x2F;cpp-httplib&#x2F;ja&#x2F;tour&#x2F;04-static-file-server&#x2F;" class="">Static File Server</a></li>
<li><a href="&#x2F;cpp-httplib&#x2F;ja&#x2F;tour&#x2F;05-tls-setup&#x2F;" class="">TLS Setup</a></li>
<li><a href="&#x2F;cpp-httplib&#x2F;ja&#x2F;tour&#x2F;06-https-client&#x2F;" class="active">HTTPS Client</a></li>
<li><a href="&#x2F;cpp-httplib&#x2F;ja&#x2F;tour&#x2F;07-https-server&#x2F;" class="">HTTPS Server</a></li>
<li><a href="&#x2F;cpp-httplib&#x2F;ja&#x2F;tour&#x2F;08-websocket&#x2F;" class="">WebSocket</a></li>
<li><a href="&#x2F;cpp-httplib&#x2F;ja&#x2F;tour&#x2F;09-whats-next&#x2F;" class="">What&#x27;s Next</a></li>
</ul>
</div>
</nav>
</aside>
<main class="content">
<article>
<h1>HTTPS Client</h1>
<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:#2d2d2d;">
<span style="color:#cc99cc;">#define </span><span style="color:#d3d0c8;">CPPHTTPLIB_OPENSSL_SUPPORT
</span><span style="color:#cc99cc;">#include </span><span style="color:#d3d0c8;">&quot;</span><span style="color:#99cc99;">httplib.h</span><span style="color:#d3d0c8;">&quot;
</span><span style="color:#cc99cc;">#include </span><span style="color:#d3d0c8;">&lt;</span><span style="color:#99cc99;">iostream</span><span style="color:#d3d0c8;">&gt;
</span><span style="color:#d3d0c8;">
</span><span style="color:#cc99cc;">int </span><span style="color:#6699cc;">main</span><span style="color:#d3d0c8;">() {
</span><span style="color:#d3d0c8;"> httplib::Client </span><span style="color:#6699cc;">cli</span><span style="color:#d3d0c8;">(&quot;</span><span style="color:#99cc99;">https://nghttp2.org</span><span style="color:#d3d0c8;">&quot;);
</span><span style="color:#d3d0c8;">
</span><span style="color:#d3d0c8;"> </span><span style="color:#cc99cc;">auto</span><span style="color:#d3d0c8;"> res = cli.</span><span style="color:#6699cc;">Get</span><span style="color:#d3d0c8;">(&quot;</span><span style="color:#99cc99;">/</span><span style="color:#d3d0c8;">&quot;);
</span><span style="color:#d3d0c8;"> </span><span style="color:#cc99cc;">if </span><span style="color:#d3d0c8;">(res) {
</span><span style="color:#d3d0c8;"> std::cout &lt;&lt; res-&gt;</span><span style="color:#f2777a;">status </span><span style="color:#d3d0c8;">&lt;&lt; std::endl; </span><span style="color:#747369;">// 200
</span><span style="color:#d3d0c8;"> std::cout &lt;&lt; res-&gt;</span><span style="color:#f2777a;">body</span><span style="color:#d3d0c8;">.</span><span style="color:#6699cc;">substr</span><span style="color:#d3d0c8;">(</span><span style="color:#f99157;">0</span><span style="color:#d3d0c8;">, </span><span style="color:#f99157;">100</span><span style="color:#d3d0c8;">) &lt;&lt; std::endl; </span><span style="color:#747369;">// HTMLの先頭部分
</span><span style="color:#d3d0c8;"> } </span><span style="color:#cc99cc;">else </span><span style="color:#d3d0c8;">{
</span><span style="color:#d3d0c8;"> std::cout &lt;&lt; &quot;</span><span style="color:#99cc99;">Error: </span><span style="color:#d3d0c8;">&quot; &lt;&lt; </span><span style="color:#6699cc;">httplib::to_string</span><span style="color:#d3d0c8;">(res.</span><span style="color:#6699cc;">error</span><span style="color:#d3d0c8;">()) &lt;&lt; std::endl;
</span><span style="color:#d3d0c8;"> }
</span><span style="color:#d3d0c8;">}
</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:#2d2d2d;">
<span style="color:#6699cc;">curl</span><span style="color:#d3d0c8;"> 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:#2d2d2d;">
<span style="color:#d3d0c8;">httplib::Client </span><span style="color:#6699cc;">cli</span><span style="color:#d3d0c8;">(&quot;</span><span style="color:#99cc99;">https://localhost:8443</span><span style="color:#d3d0c8;">&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:#2d2d2d;">
<span style="color:#d3d0c8;">httplib::Client </span><span style="color:#6699cc;">cli</span><span style="color:#d3d0c8;">(&quot;</span><span style="color:#99cc99;">https://nghttp2.org</span><span style="color:#d3d0c8;">&quot;);
</span><span style="color:#d3d0c8;">cli.</span><span style="color:#6699cc;">set_ca_cert_path</span><span style="color:#d3d0c8;">(&quot;</span><span style="color:#99cc99;">/etc/ssl/certs/ca-certificates.crt</span><span style="color:#d3d0c8;">&quot;);
</span><span style="color:#d3d0c8;">
</span><span style="color:#cc99cc;">auto</span><span style="color:#d3d0c8;"> res = cli.</span><span style="color:#6699cc;">Get</span><span style="color:#d3d0c8;">(&quot;</span><span style="color:#99cc99;">/</span><span style="color:#d3d0c8;">&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:#2d2d2d;">
<span style="color:#6699cc;">curl</span><span style="color:#f2777a;"> --cacert</span><span style="color:#d3d0c8;"> /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:#2d2d2d;">
<span style="color:#d3d0c8;">httplib::Client </span><span style="color:#6699cc;">cli</span><span style="color:#d3d0c8;">(&quot;</span><span style="color:#99cc99;">https://localhost:8443</span><span style="color:#d3d0c8;">&quot;);
</span><span style="color:#d3d0c8;">cli.</span><span style="color:#6699cc;">enable_server_certificate_verification</span><span style="color:#d3d0c8;">(</span><span style="color:#f99157;">false</span><span style="color:#d3d0c8;">);
</span><span style="color:#d3d0c8;">
</span><span style="color:#cc99cc;">auto</span><span style="color:#d3d0c8;"> res = cli.</span><span style="color:#6699cc;">Get</span><span style="color:#d3d0c8;">(&quot;</span><span style="color:#99cc99;">/</span><span style="color:#d3d0c8;">&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:#2d2d2d;">
<span style="color:#6699cc;">curl</span><span style="color:#f2777a;"> -k</span><span style="color:#d3d0c8;"> 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:#2d2d2d;">
<span style="color:#d3d0c8;">httplib::Client </span><span style="color:#6699cc;">cli</span><span style="color:#d3d0c8;">(&quot;</span><span style="color:#99cc99;">https://nghttp2.org</span><span style="color:#d3d0c8;">&quot;);
</span><span style="color:#d3d0c8;">
</span><span style="color:#cc99cc;">auto</span><span style="color:#d3d0c8;"> res = cli.</span><span style="color:#6699cc;">Get</span><span style="color:#d3d0c8;">(&quot;</span><span style="color:#99cc99;">/httpbin/redirect/3</span><span style="color:#d3d0c8;">&quot;);
</span><span style="color:#cc99cc;">if </span><span style="color:#d3d0c8;">(res) {
</span><span style="color:#d3d0c8;"> std::cout &lt;&lt; res-&gt;</span><span style="color:#f2777a;">status </span><span style="color:#d3d0c8;">&lt;&lt; std::endl; </span><span style="color:#747369;">// 302
</span><span style="color:#d3d0c8;"> std::cout &lt;&lt; res-&gt;</span><span style="color:#6699cc;">get_header_value</span><span style="color:#d3d0c8;">(&quot;</span><span style="color:#99cc99;">Location</span><span style="color:#d3d0c8;">&quot;) &lt;&lt; std::endl;
</span><span style="color:#d3d0c8;">}
</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:#2d2d2d;">
<span style="color:#6699cc;">curl</span><span style="color:#d3d0c8;"> 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:#2d2d2d;">
<span style="color:#d3d0c8;">httplib::Client </span><span style="color:#6699cc;">cli</span><span style="color:#d3d0c8;">(&quot;</span><span style="color:#99cc99;">https://nghttp2.org</span><span style="color:#d3d0c8;">&quot;);
</span><span style="color:#d3d0c8;">cli.</span><span style="color:#6699cc;">set_follow_location</span><span style="color:#d3d0c8;">(</span><span style="color:#f99157;">true</span><span style="color:#d3d0c8;">);
</span><span style="color:#d3d0c8;">
</span><span style="color:#cc99cc;">auto</span><span style="color:#d3d0c8;"> res = cli.</span><span style="color:#6699cc;">Get</span><span style="color:#d3d0c8;">(&quot;</span><span style="color:#99cc99;">/httpbin/redirect/3</span><span style="color:#d3d0c8;">&quot;);
</span><span style="color:#cc99cc;">if </span><span style="color:#d3d0c8;">(res) {
</span><span style="color:#d3d0c8;"> std::cout &lt;&lt; res-&gt;</span><span style="color:#f2777a;">status </span><span style="color:#d3d0c8;">&lt;&lt; std::endl; </span><span style="color:#747369;">// 200（最終的なレスポンス）
</span><span style="color:#d3d0c8;">}
</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:#2d2d2d;">
<span style="color:#6699cc;">curl</span><span style="color:#f2777a;"> -L</span><span style="color:#d3d0c8;"> 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>
</article>
</main>
</div>
<footer class="footer">
&copy; 2026 yhirose. 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>
Reference in New Issue View Git Blame Copy Permalink