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HTMLif (url.pathname === "/") {return new Response(getRootHtml(), {headers: {'Content-Type': 'text/html; charset=utf-8'}});}// 从请求路径中提取目标 URLlet 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 URLconst 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://s4.zstatic.net/ajax/libs/materialize/1.0.0/css/materialize.min.css" rel="stylesheet"><title>Proxy Everything</title><link rel="icon" type="image/png" href="https://s2.hdslb.com/bfs/openplatform/1682b11880f5c53171217a03c8adc9f2e2a27fcf.png@100w.webp"><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://s2.hdslb.com/bfs/openplatform/1682b11880f5c53171217a03c8adc9f2e2a27fcf.png@100w.webp"><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://s2.hdslb.com/bfs/openplatform/1682b11880f5c53171217a03c8adc9f2e2a27fcf.png@100w.webp"><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-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;}@media (prefers-color-scheme: dark) {body, html {background-color: #121212;color: #e0e0e0;}.card {background-color: rgba(33, 33, 33, 0.9);color: #ffffff;}.card:hover {background-color: rgba(50, 50, 50, 1);box-shadow: 0px 8px 16px rgba(0, 0, 0, 0.6);}.input-field input[type=text] {color: #ffffff;}.input-field input[type=text]:focus+label {color: #ffffff !important;}.input-field input[type=text]:focus {border-bottom: 1px solid #ffffff !important;box-shadow: 0 1px 0 0 #ffffff !important;}label {color: #cccccc;}}</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://s4.zstatic.net/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>`;
}
