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797758a742
* Add initial documentations * Update documentation for Basic Client and add WebSocket section * feat: add a static site generator with multi-language support - Introduced a new Rust-based static site generator in the `docs-gen` directory. - Implemented core functionality for building sites from markdown files, including: - Configuration loading from `config.toml`. - Markdown rendering with frontmatter support. - Navigation generation based on page structure. - Static file copying and output directory management. - Added templates for base layout, pages, and portal. - Created a CSS file for styling and a JavaScript file for interactive features like language selection and theme toggling. - Updated documentation source with new configuration and example pages in English and Japanese. - Added a `justfile` target for building the documentation site. * Add language/theme toggle functionality - Created a new Japanese tour index page at docs/ja/tour/index.html - Implemented navigation links for various sections of the cpp-httplib tutorial - Added a language selector to switch between English and Japanese - Introduced theme toggle functionality to switch between light and dark modes - Added mobile sidebar toggle for better navigation on smaller screens
293 lines
25 KiB
HTML
293 lines
25 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>WebSocket - cpp-httplib</title>
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<link rel="stylesheet" href="/css/main.css">
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<script>
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(function() {
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var t = localStorage.getItem('preferred-theme');
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if (!t) t = window.matchMedia('(prefers-color-scheme: light)').matches ? 'light' : 'dark';
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if (t === 'light') document.documentElement.setAttribute('data-theme', 'light');
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})();
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</script>
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</head>
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<body>
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<header class="header">
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<div class="header-inner">
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<a href="/en/" class="header-title">cpp-httplib <span style="font-size:0.75em;font-weight:normal;margin-left:4px">v0.35.0</span></a>
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<div class="header-spacer"></div>
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<nav class="header-nav">
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<a href="/en/">Home</a>
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<a href="/en/tour/">Tour</a>
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</nav>
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<div class="header-tools">
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<button class="theme-toggle" aria-label="Toggle theme"></button>
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<div class="lang-selector">
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<button class="lang-btn" aria-label="Language">EN</button>
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<li><a href="#" data-lang="en">EN</a></li>
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<li><a href="#" data-lang="ja">JA</a></li>
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<div class="nav-section">
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<a href="/en/tour/" class="nav-section-title active">A Tour of cpp-httplib</a>
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<ul class="nav-list">
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<li><a href="/en/tour/01-getting-started/" class="">Getting Started</a></li>
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<li><a href="/en/tour/02-basic-client/" class="">Basic Client</a></li>
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<li><a href="/en/tour/03-basic-server/" class="">Basic Server</a></li>
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<li><a href="/en/tour/04-static-file-server/" class="">Static File Server</a></li>
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<li><a href="/en/tour/05-tls-setup/" class="">TLS Setup</a></li>
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<li><a href="/en/tour/06-https-client/" class="">HTTPS Client</a></li>
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<li><a href="/en/tour/07-https-server/" class="">HTTPS Server</a></li>
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<li><a href="/en/tour/08-websocket/" class="active">WebSocket</a></li>
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<li><a href="/en/tour/09-whats-next/" class="">What's Next</a></li>
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</ul>
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</div>
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</nav>
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</aside>
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<main class="content">
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<article>
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<h1>WebSocket</h1>
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<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>
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<p>Let's build an echo server and client right away.</p>
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<h2>Echo Server</h2>
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<p>Here's an echo server that sends back whatever message it receives.</p>
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<div class="code-dark"><pre style="background-color:#2d2d2d;">
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<span style="color:#cc99cc;">#include </span><span style="color:#d3d0c8;">"</span><span style="color:#99cc99;">httplib.h</span><span style="color:#d3d0c8;">"
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</span><span style="color:#cc99cc;">#include </span><span style="color:#d3d0c8;"><</span><span style="color:#99cc99;">iostream</span><span style="color:#d3d0c8;">>
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</span><span style="color:#d3d0c8;">
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</span><span style="color:#cc99cc;">int </span><span style="color:#6699cc;">main</span><span style="color:#d3d0c8;">() {
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</span><span style="color:#d3d0c8;"> httplib::Server svr;
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</span><span style="color:#d3d0c8;">
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</span><span style="color:#d3d0c8;"> svr.</span><span style="color:#6699cc;">WebSocket</span><span style="color:#d3d0c8;">("</span><span style="color:#99cc99;">/ws</span><span style="color:#d3d0c8;">", [](</span><span style="color:#cc99cc;">const</span><span style="color:#d3d0c8;"> httplib::Request &, httplib::ws::WebSocket &ws) {
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</span><span style="color:#d3d0c8;"> std::string msg;
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</span><span style="color:#d3d0c8;"> </span><span style="color:#cc99cc;">while </span><span style="color:#d3d0c8;">(ws.</span><span style="color:#6699cc;">read</span><span style="color:#d3d0c8;">(msg)) {
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</span><span style="color:#d3d0c8;"> ws.</span><span style="color:#6699cc;">send</span><span style="color:#d3d0c8;">(msg); </span><span style="color:#747369;">// Send back the received message as-is
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</span><span style="color:#d3d0c8;"> }
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</span><span style="color:#d3d0c8;"> });
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</span><span style="color:#d3d0c8;">
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</span><span style="color:#d3d0c8;"> std::cout << "</span><span style="color:#99cc99;">Listening on port 8080...</span><span style="color:#d3d0c8;">" << std::endl;
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</span><span style="color:#d3d0c8;"> svr.</span><span style="color:#6699cc;">listen</span><span style="color:#d3d0c8;">("</span><span style="color:#99cc99;">0.0.0.0</span><span style="color:#d3d0c8;">", </span><span style="color:#f99157;">8080</span><span style="color:#d3d0c8;">);
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</span><span style="color:#d3d0c8;">}
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</span></pre>
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</div><div class="code-light"><pre style="background-color:#eff1f5;">
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<span style="color:#b48ead;">#include </span><span style="color:#4f5b66;">"</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#4f5b66;">"
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</span><span style="color:#b48ead;">#include </span><span style="color:#4f5b66;"><</span><span style="color:#a3be8c;">iostream</span><span style="color:#4f5b66;">>
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</span><span style="color:#4f5b66;">
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</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#4f5b66;">() {
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</span><span style="color:#4f5b66;"> httplib::Server svr;
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</span><span style="color:#4f5b66;">
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</span><span style="color:#4f5b66;"> svr.</span><span style="color:#8fa1b3;">WebSocket</span><span style="color:#4f5b66;">("</span><span style="color:#a3be8c;">/ws</span><span style="color:#4f5b66;">", [](</span><span style="color:#b48ead;">const</span><span style="color:#4f5b66;"> httplib::Request &, httplib::ws::WebSocket &ws) {
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</span><span style="color:#4f5b66;"> std::string msg;
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</span><span style="color:#4f5b66;"> </span><span style="color:#b48ead;">while </span><span style="color:#4f5b66;">(ws.</span><span style="color:#8fa1b3;">read</span><span style="color:#4f5b66;">(msg)) {
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</span><span style="color:#4f5b66;"> ws.</span><span style="color:#8fa1b3;">send</span><span style="color:#4f5b66;">(msg); </span><span style="color:#a7adba;">// Send back the received message as-is
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</span><span style="color:#4f5b66;"> }
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</span><span style="color:#4f5b66;"> });
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</span><span style="color:#4f5b66;">
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</span><span style="color:#4f5b66;"> std::cout << "</span><span style="color:#a3be8c;">Listening on port 8080...</span><span style="color:#4f5b66;">" << std::endl;
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</span><span style="color:#4f5b66;"> svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#4f5b66;">("</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#4f5b66;">", </span><span style="color:#d08770;">8080</span><span style="color:#4f5b66;">);
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</span><span style="color:#4f5b66;">}
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</span></pre>
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</div>
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<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>
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<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>
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<h2>Connecting from a Client</h2>
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<p>Let's connect to the server using <code>httplib::ws::WebSocketClient</code>.</p>
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<div class="code-dark"><pre style="background-color:#2d2d2d;">
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<span style="color:#cc99cc;">#include </span><span style="color:#d3d0c8;">"</span><span style="color:#99cc99;">httplib.h</span><span style="color:#d3d0c8;">"
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</span><span style="color:#cc99cc;">#include </span><span style="color:#d3d0c8;"><</span><span style="color:#99cc99;">iostream</span><span style="color:#d3d0c8;">>
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</span><span style="color:#d3d0c8;">
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</span><span style="color:#cc99cc;">int </span><span style="color:#6699cc;">main</span><span style="color:#d3d0c8;">() {
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</span><span style="color:#d3d0c8;"> httplib::ws::WebSocketClient </span><span style="color:#6699cc;">client</span><span style="color:#d3d0c8;">("</span><span style="color:#99cc99;">ws://localhost:8080/ws</span><span style="color:#d3d0c8;">");
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</span><span style="color:#d3d0c8;">
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</span><span style="color:#d3d0c8;"> </span><span style="color:#cc99cc;">if </span><span style="color:#d3d0c8;">(!client.</span><span style="color:#6699cc;">connect</span><span style="color:#d3d0c8;">()) {
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</span><span style="color:#d3d0c8;"> std::cout << "</span><span style="color:#99cc99;">Connection failed</span><span style="color:#d3d0c8;">" << std::endl;
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</span><span style="color:#d3d0c8;"> </span><span style="color:#cc99cc;">return </span><span style="color:#f99157;">1</span><span style="color:#d3d0c8;">;
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</span><span style="color:#d3d0c8;"> }
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</span><span style="color:#d3d0c8;">
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</span><span style="color:#d3d0c8;"> </span><span style="color:#747369;">// Send a message
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</span><span style="color:#d3d0c8;"> client.</span><span style="color:#6699cc;">send</span><span style="color:#d3d0c8;">("</span><span style="color:#99cc99;">Hello, WebSocket!</span><span style="color:#d3d0c8;">");
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</span><span style="color:#d3d0c8;">
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</span><span style="color:#d3d0c8;"> </span><span style="color:#747369;">// Receive a response from the server
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</span><span style="color:#d3d0c8;"> std::string msg;
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</span><span style="color:#d3d0c8;"> </span><span style="color:#cc99cc;">if </span><span style="color:#d3d0c8;">(client.</span><span style="color:#6699cc;">read</span><span style="color:#d3d0c8;">(msg)) {
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</span><span style="color:#d3d0c8;"> std::cout << msg << std::endl; </span><span style="color:#747369;">// Hello, WebSocket!
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</span><span style="color:#d3d0c8;"> }
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</span><span style="color:#d3d0c8;">
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</span><span style="color:#d3d0c8;"> client.</span><span style="color:#6699cc;">close</span><span style="color:#d3d0c8;">();
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</span><span style="color:#d3d0c8;">}
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</span></pre>
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</div><div class="code-light"><pre style="background-color:#eff1f5;">
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<span style="color:#b48ead;">#include </span><span style="color:#4f5b66;">"</span><span style="color:#a3be8c;">httplib.h</span><span style="color:#4f5b66;">"
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</span><span style="color:#b48ead;">#include </span><span style="color:#4f5b66;"><</span><span style="color:#a3be8c;">iostream</span><span style="color:#4f5b66;">>
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</span><span style="color:#4f5b66;">
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</span><span style="color:#b48ead;">int </span><span style="color:#8fa1b3;">main</span><span style="color:#4f5b66;">() {
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</span><span style="color:#4f5b66;"> httplib::ws::WebSocketClient </span><span style="color:#8fa1b3;">client</span><span style="color:#4f5b66;">("</span><span style="color:#a3be8c;">ws://localhost:8080/ws</span><span style="color:#4f5b66;">");
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</span><span style="color:#4f5b66;">
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</span><span style="color:#4f5b66;"> </span><span style="color:#b48ead;">if </span><span style="color:#4f5b66;">(!client.</span><span style="color:#8fa1b3;">connect</span><span style="color:#4f5b66;">()) {
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</span><span style="color:#4f5b66;"> std::cout << "</span><span style="color:#a3be8c;">Connection failed</span><span style="color:#4f5b66;">" << std::endl;
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</span><span style="color:#4f5b66;"> </span><span style="color:#b48ead;">return </span><span style="color:#d08770;">1</span><span style="color:#4f5b66;">;
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</span><span style="color:#4f5b66;"> }
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</span><span style="color:#4f5b66;">
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</span><span style="color:#4f5b66;"> </span><span style="color:#a7adba;">// Send a message
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</span><span style="color:#4f5b66;"> client.</span><span style="color:#8fa1b3;">send</span><span style="color:#4f5b66;">("</span><span style="color:#a3be8c;">Hello, WebSocket!</span><span style="color:#4f5b66;">");
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</span><span style="color:#4f5b66;">
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</span><span style="color:#4f5b66;"> </span><span style="color:#a7adba;">// Receive a response from the server
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</span><span style="color:#4f5b66;"> std::string msg;
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</span><span style="color:#4f5b66;"> </span><span style="color:#b48ead;">if </span><span style="color:#4f5b66;">(client.</span><span style="color:#8fa1b3;">read</span><span style="color:#4f5b66;">(msg)) {
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</span><span style="color:#4f5b66;"> std::cout << msg << std::endl; </span><span style="color:#a7adba;">// Hello, WebSocket!
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</span><span style="color:#4f5b66;"> }
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</span><span style="color:#4f5b66;">
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</span><span style="color:#4f5b66;"> client.</span><span style="color:#8fa1b3;">close</span><span style="color:#4f5b66;">();
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</span><span style="color:#4f5b66;">}
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</span></pre>
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</div>
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<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>
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<h2>Text and Binary</h2>
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<p>WebSocket has two types of messages: text and binary. You can tell them apart by the return value of <code>read()</code>.</p>
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<div class="code-dark"><pre style="background-color:#2d2d2d;">
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<span style="color:#d3d0c8;">svr.</span><span style="color:#6699cc;">WebSocket</span><span style="color:#d3d0c8;">("</span><span style="color:#99cc99;">/ws</span><span style="color:#d3d0c8;">", [](</span><span style="color:#cc99cc;">const</span><span style="color:#d3d0c8;"> httplib::Request &, httplib::ws::WebSocket &ws) {
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</span><span style="color:#d3d0c8;"> std::string msg;
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</span><span style="color:#d3d0c8;"> httplib::ws::ReadResult ret;
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</span><span style="color:#d3d0c8;"> </span><span style="color:#cc99cc;">while </span><span style="color:#d3d0c8;">((ret = ws.</span><span style="color:#6699cc;">read</span><span style="color:#d3d0c8;">(msg))) {
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</span><span style="color:#d3d0c8;"> </span><span style="color:#cc99cc;">if </span><span style="color:#d3d0c8;">(ret == httplib::ws::Binary) {
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</span><span style="color:#d3d0c8;"> ws.</span><span style="color:#6699cc;">send</span><span style="color:#d3d0c8;">(msg.</span><span style="color:#6699cc;">data</span><span style="color:#d3d0c8;">(), msg.</span><span style="color:#6699cc;">size</span><span style="color:#d3d0c8;">()); </span><span style="color:#747369;">// Send as binary
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</span><span style="color:#d3d0c8;"> } </span><span style="color:#cc99cc;">else </span><span style="color:#d3d0c8;">{
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</span><span style="color:#d3d0c8;"> ws.</span><span style="color:#6699cc;">send</span><span style="color:#d3d0c8;">(msg); </span><span style="color:#747369;">// Send as text
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</span><span style="color:#d3d0c8;"> }
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</span><span style="color:#d3d0c8;"> }
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</span><span style="color:#d3d0c8;">});
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</span></pre>
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</div><div class="code-light"><pre style="background-color:#eff1f5;">
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<span style="color:#4f5b66;">svr.</span><span style="color:#8fa1b3;">WebSocket</span><span style="color:#4f5b66;">("</span><span style="color:#a3be8c;">/ws</span><span style="color:#4f5b66;">", [](</span><span style="color:#b48ead;">const</span><span style="color:#4f5b66;"> httplib::Request &, httplib::ws::WebSocket &ws) {
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</span><span style="color:#4f5b66;"> std::string msg;
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</span><span style="color:#4f5b66;"> httplib::ws::ReadResult ret;
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</span><span style="color:#4f5b66;"> </span><span style="color:#b48ead;">while </span><span style="color:#4f5b66;">((ret = ws.</span><span style="color:#8fa1b3;">read</span><span style="color:#4f5b66;">(msg))) {
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</span><span style="color:#4f5b66;"> </span><span style="color:#b48ead;">if </span><span style="color:#4f5b66;">(ret == httplib::ws::Binary) {
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</span><span style="color:#4f5b66;"> ws.</span><span style="color:#8fa1b3;">send</span><span style="color:#4f5b66;">(msg.</span><span style="color:#8fa1b3;">data</span><span style="color:#4f5b66;">(), msg.</span><span style="color:#8fa1b3;">size</span><span style="color:#4f5b66;">()); </span><span style="color:#a7adba;">// Send as binary
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</span><span style="color:#4f5b66;"> } </span><span style="color:#b48ead;">else </span><span style="color:#4f5b66;">{
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</span><span style="color:#4f5b66;"> ws.</span><span style="color:#8fa1b3;">send</span><span style="color:#4f5b66;">(msg); </span><span style="color:#a7adba;">// Send as text
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</span><span style="color:#4f5b66;"> }
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</span><span style="color:#4f5b66;"> }
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</span><span style="color:#4f5b66;">});
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</span></pre>
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</div>
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<ul>
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<li><code>ws.send(const std::string &)</code> — sends as a text message</li>
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<li><code>ws.send(const char *, size_t)</code> — sends as a binary message</li>
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</ul>
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<p>The client-side API is the same.</p>
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<h2>Accessing Request Information</h2>
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<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>
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<div class="code-dark"><pre style="background-color:#2d2d2d;">
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<span style="color:#d3d0c8;">svr.</span><span style="color:#6699cc;">WebSocket</span><span style="color:#d3d0c8;">("</span><span style="color:#99cc99;">/ws</span><span style="color:#d3d0c8;">", [](</span><span style="color:#cc99cc;">const</span><span style="color:#d3d0c8;"> httplib::Request &req, httplib::ws::WebSocket &ws) {
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</span><span style="color:#d3d0c8;"> </span><span style="color:#cc99cc;">auto</span><span style="color:#d3d0c8;"> token = req.</span><span style="color:#6699cc;">get_header_value</span><span style="color:#d3d0c8;">("</span><span style="color:#99cc99;">Authorization</span><span style="color:#d3d0c8;">");
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</span><span style="color:#d3d0c8;"> </span><span style="color:#cc99cc;">if </span><span style="color:#d3d0c8;">(token.</span><span style="color:#6699cc;">empty</span><span style="color:#d3d0c8;">()) {
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</span><span style="color:#d3d0c8;"> ws.</span><span style="color:#6699cc;">close</span><span style="color:#d3d0c8;">(httplib::ws::CloseStatus::PolicyViolation, "</span><span style="color:#99cc99;">unauthorized</span><span style="color:#d3d0c8;">");
|
|
</span><span style="color:#d3d0c8;"> </span><span style="color:#cc99cc;">return</span><span style="color:#d3d0c8;">;
|
|
</span><span style="color:#d3d0c8;"> }
|
|
</span><span style="color:#d3d0c8;">
|
|
</span><span style="color:#d3d0c8;"> std::string msg;
|
|
</span><span style="color:#d3d0c8;"> </span><span style="color:#cc99cc;">while </span><span style="color:#d3d0c8;">(ws.</span><span style="color:#6699cc;">read</span><span style="color:#d3d0c8;">(msg)) {
|
|
</span><span style="color:#d3d0c8;"> ws.</span><span style="color:#6699cc;">send</span><span style="color:#d3d0c8;">(msg);
|
|
</span><span style="color:#d3d0c8;"> }
|
|
</span><span style="color:#d3d0c8;">});
|
|
</span></pre>
|
|
</div><div class="code-light"><pre style="background-color:#eff1f5;">
|
|
<span style="color:#4f5b66;">svr.</span><span style="color:#8fa1b3;">WebSocket</span><span style="color:#4f5b66;">("</span><span style="color:#a3be8c;">/ws</span><span style="color:#4f5b66;">", [](</span><span style="color:#b48ead;">const</span><span style="color:#4f5b66;"> httplib::Request &req, httplib::ws::WebSocket &ws) {
|
|
</span><span style="color:#4f5b66;"> </span><span style="color:#b48ead;">auto</span><span style="color:#4f5b66;"> token = req.</span><span style="color:#8fa1b3;">get_header_value</span><span style="color:#4f5b66;">("</span><span style="color:#a3be8c;">Authorization</span><span style="color:#4f5b66;">");
|
|
</span><span style="color:#4f5b66;"> </span><span style="color:#b48ead;">if </span><span style="color:#4f5b66;">(token.</span><span style="color:#8fa1b3;">empty</span><span style="color:#4f5b66;">()) {
|
|
</span><span style="color:#4f5b66;"> ws.</span><span style="color:#8fa1b3;">close</span><span style="color:#4f5b66;">(httplib::ws::CloseStatus::PolicyViolation, "</span><span style="color:#a3be8c;">unauthorized</span><span style="color:#4f5b66;">");
|
|
</span><span style="color:#4f5b66;"> </span><span style="color:#b48ead;">return</span><span style="color:#4f5b66;">;
|
|
</span><span style="color:#4f5b66;"> }
|
|
</span><span style="color:#4f5b66;">
|
|
</span><span style="color:#4f5b66;"> std::string msg;
|
|
</span><span style="color:#4f5b66;"> </span><span style="color:#b48ead;">while </span><span style="color:#4f5b66;">(ws.</span><span style="color:#8fa1b3;">read</span><span style="color:#4f5b66;">(msg)) {
|
|
</span><span style="color:#4f5b66;"> ws.</span><span style="color:#8fa1b3;">send</span><span style="color:#4f5b66;">(msg);
|
|
</span><span style="color:#4f5b66;"> }
|
|
</span><span style="color:#4f5b66;">});
|
|
</span></pre>
|
|
</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-dark"><pre style="background-color:#2d2d2d;">
|
|
<span style="color:#d3d0c8;">httplib::SSLServer </span><span style="color:#6699cc;">svr</span><span style="color:#d3d0c8;">("</span><span style="color:#99cc99;">cert.pem</span><span style="color:#d3d0c8;">", "</span><span style="color:#99cc99;">key.pem</span><span style="color:#d3d0c8;">");
|
|
</span><span style="color:#d3d0c8;">
|
|
</span><span style="color:#d3d0c8;">svr.</span><span style="color:#6699cc;">WebSocket</span><span style="color:#d3d0c8;">("</span><span style="color:#99cc99;">/ws</span><span style="color:#d3d0c8;">", [](</span><span style="color:#cc99cc;">const</span><span style="color:#d3d0c8;"> httplib::Request &, httplib::ws::WebSocket &ws) {
|
|
</span><span style="color:#d3d0c8;"> std::string msg;
|
|
</span><span style="color:#d3d0c8;"> </span><span style="color:#cc99cc;">while </span><span style="color:#d3d0c8;">(ws.</span><span style="color:#6699cc;">read</span><span style="color:#d3d0c8;">(msg)) {
|
|
</span><span style="color:#d3d0c8;"> ws.</span><span style="color:#6699cc;">send</span><span style="color:#d3d0c8;">(msg);
|
|
</span><span style="color:#d3d0c8;"> }
|
|
</span><span style="color:#d3d0c8;">});
|
|
</span><span style="color:#d3d0c8;">
|
|
</span><span style="color:#d3d0c8;">svr.</span><span style="color:#6699cc;">listen</span><span style="color:#d3d0c8;">("</span><span style="color:#99cc99;">0.0.0.0</span><span style="color:#d3d0c8;">", </span><span style="color:#f99157;">8443</span><span style="color:#d3d0c8;">);
|
|
</span></pre>
|
|
</div><div class="code-light"><pre style="background-color:#eff1f5;">
|
|
<span style="color:#4f5b66;">httplib::SSLServer </span><span style="color:#8fa1b3;">svr</span><span style="color:#4f5b66;">("</span><span style="color:#a3be8c;">cert.pem</span><span style="color:#4f5b66;">", "</span><span style="color:#a3be8c;">key.pem</span><span style="color:#4f5b66;">");
|
|
</span><span style="color:#4f5b66;">
|
|
</span><span style="color:#4f5b66;">svr.</span><span style="color:#8fa1b3;">WebSocket</span><span style="color:#4f5b66;">("</span><span style="color:#a3be8c;">/ws</span><span style="color:#4f5b66;">", [](</span><span style="color:#b48ead;">const</span><span style="color:#4f5b66;"> httplib::Request &, httplib::ws::WebSocket &ws) {
|
|
</span><span style="color:#4f5b66;"> std::string msg;
|
|
</span><span style="color:#4f5b66;"> </span><span style="color:#b48ead;">while </span><span style="color:#4f5b66;">(ws.</span><span style="color:#8fa1b3;">read</span><span style="color:#4f5b66;">(msg)) {
|
|
</span><span style="color:#4f5b66;"> ws.</span><span style="color:#8fa1b3;">send</span><span style="color:#4f5b66;">(msg);
|
|
</span><span style="color:#4f5b66;"> }
|
|
</span><span style="color:#4f5b66;">});
|
|
</span><span style="color:#4f5b66;">
|
|
</span><span style="color:#4f5b66;">svr.</span><span style="color:#8fa1b3;">listen</span><span style="color:#4f5b66;">("</span><span style="color:#a3be8c;">0.0.0.0</span><span style="color:#4f5b66;">", </span><span style="color:#d08770;">8443</span><span style="color:#4f5b66;">);
|
|
</span></pre>
|
|
</div>
|
|
<p>On the client side, use the <code>wss://</code> scheme.</p>
|
|
<div class="code-dark"><pre style="background-color:#2d2d2d;">
|
|
<span style="color:#d3d0c8;">httplib::ws::WebSocketClient </span><span style="color:#6699cc;">client</span><span style="color:#d3d0c8;">("</span><span style="color:#99cc99;">wss://localhost:8443/ws</span><span style="color:#d3d0c8;">");
|
|
</span></pre>
|
|
</div><div class="code-light"><pre style="background-color:#eff1f5;">
|
|
<span style="color:#4f5b66;">httplib::ws::WebSocketClient </span><span style="color:#8fa1b3;">client</span><span style="color:#4f5b66;">("</span><span style="color:#a3be8c;">wss://localhost:8443/ws</span><span style="color:#4f5b66;">");
|
|
</span></pre>
|
|
</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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