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HongShi418 commited on Jan 12

Commit

ed032cb

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1 Parent(s): a09f614

Create index.js

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src/index.js +220 -0

src/index.js ADDED Viewed

	@@ -0,0 +1,220 @@

+addEventListener('fetch', event => {
+  event.respondWith(handleRequest(event.request));
+});
+async function handleRequest(request) {
+  try {
+      const url = new URL(request.url);
+      // 如果访问根目录，返回HTML
+      if (url.pathname === "/") {
+          return new Response(getRootHtml(), {
+              headers: {
+                  'Content-Type': 'text/html; charset=utf-8'
+              }
+          });
+      }
+      // 从请求路径中提取目标 URL
+      let actualUrlStr = decodeURIComponent(url.pathname.replace("/", ""));
+      // 判断用户输入的 URL 是否带有协议
+      actualUrlStr = ensureProtocol(actualUrlStr, url.protocol);
+      // 保留查询参数
+      actualUrlStr += url.search;
+      // 创建新 Headers 对象，排除以 'cf-' 开头的请求头
+      const newHeaders = filterHeaders(request.headers, name => !name.startsWith('cf-'));
+      // 创建一个新的请求以访问目标 URL
+      const modifiedRequest = new Request(actualUrlStr, {
+          headers: newHeaders,
+          method: request.method,
+          body: request.body,
+          redirect: 'manual'
+      });
+      // 发起对目标 URL 的请求
+      const response = await fetch(modifiedRequest);
+      let body = response.body;
+      // 处理重定向
+      if ([301, 302, 303, 307, 308].includes(response.status)) {
+          body = response.body;
+          // 创建新的 Response 对象以修改 Location 头部
+          return handleRedirect(response, body);
+      } else if (response.headers.get("Content-Type")?.includes("text/html")) {
+          body = await handleHtmlContent(response, url.protocol, url.host, actualUrlStr);
+      }
+      // 创建修改后的响应对象
+      const modifiedResponse = new Response(body, {
+          status: response.status,
+          statusText: response.statusText,
+          headers: response.headers
+      });
+      // 添加禁用缓存的头部
+      setNoCacheHeaders(modifiedResponse.headers);
+      // 添加 CORS 头部，允许跨域访问
+      setCorsHeaders(modifiedResponse.headers);
+      return modifiedResponse;
+  } catch (error) {
+      // 如果请求目标地址时出现错误，返回带有错误消息的响应和状态码 500（服务器错误）
+      return jsonResponse({
+          error: error.message
+      }, 500);
+  }
+}
+// 确保 URL 带有协议
+function ensureProtocol(url, defaultProtocol) {
+  return url.startsWith("http://") || url.startsWith("https://") ? url : defaultProtocol + "//" + url;
+}
+// 处理重定向
+function handleRedirect(response, body) {
+  const location = new URL(response.headers.get('location'));
+  const modifiedLocation = `/${encodeURIComponent(location.toString())}`;
+  return new Response(body, {
+      status: response.status,
+      statusText: response.statusText,
+      headers: {
+          ...response.headers,
+          'Location': modifiedLocation
+      }
+  });
+}
+// 处理 HTML 内容中的相对路径
+async function handleHtmlContent(response, protocol, host, actualUrlStr) {
+  const originalText = await response.text();
+  const regex = new RegExp('((href|src|action)=["\'])/(?!/)', 'g');
+  let modifiedText = replaceRelativePaths(originalText, protocol, host, new URL(actualUrlStr).origin);
+  return modifiedText;
+}
+// 替换 HTML 内容中的相对路径
+function replaceRelativePaths(text, protocol, host, origin) {
+  const regex = new RegExp('((href|src|action)=["\'])/(?!/)', 'g');
+  return text.replace(regex, `$1${protocol}//${host}/${origin}/`);
+}
+// 返回 JSON 格式的响应
+function jsonResponse(data, status) {
+  return new Response(JSON.stringify(data), {
+      status: status,
+      headers: {
+          'Content-Type': 'application/json; charset=utf-8'
+      }
+  });
+}
+// 过滤请求头
+function filterHeaders(headers, filterFunc) {
+  return new Headers([...headers].filter(([name]) => filterFunc(name)));
+}
+// 设置禁用缓存的头部
+function setNoCacheHeaders(headers) {
+  headers.set('Cache-Control', 'no-store');
+}
+// 设置 CORS 头部
+function setCorsHeaders(headers) {
+  headers.set('Access-Control-Allow-Origin', '*');
+  headers.set('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE');
+  headers.set('Access-Control-Allow-Headers', '*');
+}
+// 返回根目录的 HTML
+function getRootHtml() {
+  return `<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+  <meta charset="UTF-8">
+  <link href="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0/css/materialize.min.css" rel="stylesheet">
+  <title>Proxy Everything</title>
+  <link rel="icon" type="image/png" href="https://img.icons8.com/color/1000/kawaii-bread-1.png">
+  <meta name="Description" content="Proxy Everything with CF Workers.">
+  <meta property="og:description" content="Proxy Everything with CF Workers.">
+  <meta property="og:image" content="https://img.icons8.com/color/1000/kawaii-bread-1.png">
+  <meta name="robots" content="index, follow">
+  <meta http-equiv="Content-Language" content="zh-CN">
+  <meta name="copyright" content="Copyright © ymyuuu">
+  <meta name="author" content="ymyuuu">
+  <link rel="apple-touch-icon-precomposed" sizes="120x120" href="https://img.icons8.com/color/1000/kawaii-bread-1.png">
+  <meta name="apple-mobile-web-app-capable" content="yes">
+  <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
+  <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no">
+  <style>
+      body, html {
+          height: 100%;
+          margin: 0;
+      }
+      .background {
+          background-image: url('https://imgapi.cn/bing.php');
+          background-size: cover;
+          background-position: center;
+          height: 100%;
+          display: flex;
+          align-items: center;
+          justify-content: center;
+      }
+      .card {
+          background-color: rgba(255, 255, 255, 0.8);
+          transition: background-color 0.3s ease, box-shadow 0.3s ease;
+      }
+      .card:hover {
+          background-color: rgba(255, 255, 255, 1);
+          box-shadow: 0px 8px 16px rgba(0, 0, 0, 0.3);
+      }
+      .input-field input[type=text] {
+          color: #2c3e50;
+      }
+      .input-field input[type=text]:focus+label {
+          color: #2c3e50 !important;
+      }
+      .input-field input[type=text]:focus {
+          border-bottom: 1px solid #2c3e50 !important;
+          box-shadow: 0 1px 0 0 #2c3e50 !important;
+      }
+  </style>
+</head>
+<body>
+  <div class="background">
+      <div class="container">
+          <div class="row">
+              <div class="col s12 m8 offset-m2 l6 offset-l3">
+                  <div class="card">
+                      <div class="card-content">
+                          <span class="card-title center-align"><i class="material-icons left">link</i>Proxy Everything</span>
+                          <form id="urlForm" onsubmit="redirectToProxy(event)">
+                              <div class="input-field">
+                                  <input type="text" id="targetUrl" placeholder="在此输入目标地址" required>
+                                  <label for="targetUrl">目标地址</label>
+                              </div>
+                              <button type="submit" class="btn waves-effect waves-light teal darken-2 full-width">跳转</button>
+                          </form>
+                      </div>
+                  </div>
+              </div>
+          </div>
+      </div>
+  </div>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0/js/materialize.min.js"></script>
+  <script>
+      function redirectToProxy(event) {
+          event.preventDefault();
+          const targetUrl = document.getElementById('targetUrl').value.trim();
+          const currentOrigin = window.location.origin;
+          window.open(currentOrigin + '/' + encodeURIComponent(targetUrl), '_blank');
+      }
+  </script>
+</body>
+</html>`;
+}