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首页 / 使用 Cloudflare Workers 搭建 Docker 镜像源

使用 Cloudflare Workers 搭建 Docker 镜像源

老柴杂货铺 2025-01-10
59

在使用 Cloudflare Workers 搭建 Docker 镜像源时，需要注意 Cloudflare Workers 免费账号每天有次数限制（10 万次）和每分钟限制（1000 次）

前期准备

注册一个 Cloudflare 账号，且能正常访问。

新建一个work,将如下代码粘贴到worker.js代码窗口中部署即可

    // _worker.js
    // Docker镜像仓库主机地址
    let hub_host = 'registry-1.docker.io';
    // Docker认证服务器地址
    const auth_url = 'https://auth.docker.io';
    let 屏蔽爬虫UA = ['netcraft'];
    // 根据主机名选择对应的上游地址
    function routeByHosts(host) {
    	// 定义路由表
    	const routes = {
    		// 生产环境
    		"quay": "quay.io",
    		"gcr": "gcr.io",
    		"k8s-gcr": "k8s.gcr.io",
    		"k8s": "registry.k8s.io",
    		"ghcr": "ghcr.io",
    		"cloudsmith": "docker.cloudsmith.io",
    		"nvcr": "nvcr.io",
    		// 测试环境
    		"test": "registry-1.docker.io",
    	};
    	if (host in routes) return [routes[host], false];
    	else return [hub_host, true];
    }
    /** @type {RequestInit} */
    const PREFLIGHT_INIT = {
    	// 预检请求配置
    	headers: new Headers({
    		'access-control-allow-origin': '*',  允许所有来源
    		'access-control-allow-methods': 'GET,POST,PUT,PATCH,TRACE,DELETE,HEAD,OPTIONS', // 允许的HTTP方法
    		'access-control-max-age': '1728000', // 预检请求的缓存时间
    	}),
    }
    /**
     * 构造响应
     * @param {any} body 响应体
     * @param {number} status 响应状态码
     * @param {Object<string, string>} headers 响应头
     */
    function makeRes(body, status = 200, headers = {}) {
    	headers['access-control-allow-origin'] = '*' // 允许所有来源
    	return new Response(body, { status, headers }) // 返回新构造的响应
    }
    /**
     * 构造新的URL对象
     * @param {string} urlStr URL字符串
     * @param {string} base URL base
     */
    function newUrl(urlStr, base) {
    	try {
    		console.log(`Constructing new URL object with path ${urlStr} and base ${base}`);
    		return new URL(urlStr, base); // 尝试构造新的URL对象
    	} catch (err) {
    		console.error(err);
    		return null // 构造失败返回null
    	}
    }
    async function nginx() {
    	const text = `
    	<!DOCTYPE html>
    	<html>
    	<head>
    	<title>Welcome to nginx!</title>
    	<style>
    		body {
    			width: 35em;
    			margin: 0 auto;
    			font-family: Tahoma, Verdana, Arial, sans-serif;
    		}
    	</style>
    	</head>
    	<body>
    	<h1>Welcome to nginx!</h1>
    	<p>If you see this page, the nginx web server is successfully installed and
    	working. Further configuration is required.</p>
    	<p>For online documentation and support please refer to
    	<a href="http://nginx.org/">nginx.org</a>.<br/>
    	Commercial support is available at
    	<a href="http://nginx.com/">nginx.com</a>.</p>
    	<p><em>Thank you for using nginx.</em></p>
    	</body>
    	</html>
    	`
    	return text;
    }
    async function searchInterface() {
    	const html = `
    	<!DOCTYPE html>
    	<html>
    	<head>
    		<title>Docker Hub 镜像搜索</title>
    		<meta charset="UTF-8">
    		<meta name="viewport" content="width=device-width, initial-scale=1.0">
    		<style>
    		:root {
    			--github-color: #f0f6fc;
    			--githubbj-color: #010409;
    		}
    		* {
    			box-sizing: border-box;
    			margin: 0;
    			padding: 0;
    		}
    		body {
    			font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    			display: flex;
    			flex-direction: column;
    			justify-content: center; // 新增
    			align-items: center;
    			min-height: 100vh;
    			margin: 0;
    			background: linear-gradient(120deg, #1a90ff 0%, #003eb3 100%);
    			padding: 20px;
    		}
    		.container {
    			text-align: center;
    			width: 100%;
    			max-width: 800px;
    			padding: 0 20px;
    			margin: 0 auto; // 修改
    			display: flex; // 新增
    			flex-direction: column; // 新增
    			justify-content: center; // 新增
    			min-height: 70vh; // 新增
    		}
    		.github-corner {
    			position: fixed;
    			top: 0;
    			right: 0;
    			z-index: 999;
    		}
    		.github-corner svg {
    			fill: var(githubbj-color);
    			color: var(--github-color);
    			position: absolute;
    			top: 0;
    			border: 0;
    			right: 0;
    			width: 80px;
    			height: 80px;
    		}
    		.github-corner a,
    		.github-corner a:visited {
    		color: var(--github-color) !important;
    		}
    		.github-corner a,
    		.github-corner a:visited {
    		color: transparent !important;
    		text-decoration: none !important;
    		}
    		.github-corner .octo-body,
    		.github-corner .octo-arm {
    		fill: var(--github-color) !important;
    		}
    		.github-corner:hover .octo-arm {
    			animation: octocat-wave 560ms ease-in-out;
    		}
    		@keyframes octocat-wave {
    			0%, 100% {
    				transform: rotate(0);
    			}
    			20%, 60% {
    				transform: rotate(-25deg);
    			}
    			40%, 80% {
    				transform: rotate(10deg);
    			}
    		}
    		.logo {
    			margin-bottom: 30px;
    			transition: transform 0.3s ease;
    		}
    		.logo:hover {
    			transform: scale(1.05);
    		}
    		.title {
    			color: white;
    			font-size: 2em;
    			margin-bottom: 10px;
    			text-shadow: 0 2px 4px rgba(0,0,0,0.1);
    		}
    		.subtitle {
    			color: rgba(255,255,255,0.9);
    			font-size: 1.1em;
    			margin-bottom: 30px;
    		}
    		.search-container {
    			display: flex;
    			align-items: stretch;
    			width: 100%;
    			max-width: 600px;
    			margin: 0 auto;
    			height: 50px;
    		}
    		#search-input {
    			flex: 1;
    			padding: 15px 20px;
    			font-size: 16px;
    			border: none;
    			border-radius: 8px 0 0 8px;
    			outline: none;
    			box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    			transition: all 0.3s ease;
    		}
    		#search-input {
    			flex: 1;
    			padding: 0 20px;
    			font-size: 16px;
    			border: none;
    			border-radius: 8px 0 0 8px;
    			outline: none;
    			box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    			transition: all 0.3s ease;
    			height: 100%;
    		}
    		#search-button {
    			padding: 0 25px;
    			background-color: #0066ff;
    			border: none;
    			border-radius: 0 8px 8px 0;
    			cursor: pointer;
    			transition: all 0.3s ease;
    			height: 100%;
    			display: flex;
    			align-items: center;
    			justify-content: center;
    		}
    		#search-button:hover {
    			background-color: #0052cc;
    			transform: translateY(-1px);
    		}
    		#search-button svg {
    			width: 24px;
    			height: 24px;
    		}
    		.tips {
    			color: rgba(255,255,255,0.8);
    			margin-top: 20px;
    			font-size: 0.9em;
    		}
    		@media (max-width: 480px) {
    			.container {
    				padding: 0 15px;
    				min-height: 60vh; // 新增
    			}
    			.github-corner svg {
    				width: 60px;
    				height: 60px;
    			}
    			.github-corner:hover .octo-arm {
    				animation: none;
    			}
    			.github-corner .octo-arm {
    				animation: octocat-wave 560ms ease-in-out;
    			}
    			.search-container {
    				height: 45px;
    			}
    			#search-input {
    				padding: 0 15px;
    			}
    			#search-button {
    				padding: 0 20px;
    			}
    		}
    		</style>
    	</head>
    	<body>
    		<a href="https://github.com/cmliu/CF-Workers-docker.io" target="_blank" class="github-corner" aria-label="View source on Github">
    			<svg viewBox="0 0 250 250" aria-hidden="true">
    				<path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path>
    				<path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path>
    				<path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path>
    			</svg>
    		</a>
    		<div class="container">
    			<div class="logo">
    				<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 18" fill="#ffffff" width="120" height="90">
    					<path d="M23.763 6.886c-.065-.053-.673-.512-1.954-.512-.32 0-.659.03-1.01.087-.248-1.703-1.651-2.533-1.716-2.57l-.345-.2-.227.328a4.596 4.596 0 0 0-.611 1.433c-.23.972-.09 1.884.403 2.666-.596.331-1.546.418-1.744.42H.752a.753.753 0 0 0-.75.749c-.007 1.456.233 2.864.692 4.07.545 1.43 1.355 2.483 2.409 3.13 1.181.725 3.104 1.14 5.276 1.14 1.016 0 2.03-.092 2.93-.266 1.417-.273 2.705-.742 3.826-1.391a10.497 10.497 0 0 0 2.61-2.14c1.252-1.42 1.998-3.005 2.553-4.408.075.003.148.005.221.005 1.371 0 2.215-.55 2.68-1.01.505-.5.685-.998.704-1.053L24 7.076l-.237-.19Z"></path>
    					<path d="M2.216 8.075h2.119a.186.186 0 0 0 .185-.186V6a.186.186 0 0 0-.185-.186H2.216A.186.186 0 0 0 2.031 6v1.89c0 .103.083.186.185.186Zm2.92 0h2.118a.185.185 0 0 0 .185-.186V6a.185.185 0 0 0-.185-.186H5.136A.185.185 0 0 0 4.95 6v1.89c0 .103.083.186.186.186Zm2.964 0h2.118a.186.186 0 0 0 .185-.186V6a.186.186 0 0 0-.185-.186H8.1A.185.185 0 0 0 7.914 6v1.89c0 .103.083.186.186.186Zm2.928 0h2.119a.185.185 0 0 0 .185-.186V6a.185.185 0 0 0-.185-.186h-2.119a.186.186 0 0 0-.185.186v1.89c0 .103.083.186.185.186Zm-5.892-2.72h2.118a.185.185 0 0 0 .185-.186V3.28a.186.186 0 0 0-.185-.186H5.136a.186.186 0 0 0-.186.186v1.89c0 .103.083.186.186.186Zm2.964 0h2.118a.186.186 0 0 0 .185-.186V3.28a.186.186 0 0 0-.185-.186H8.1a.186.186 0 0 0-.186.186v1.89c0 .103.083.186.186.186Zm2.928 0h2.119a.185.185 0 0 0 .185-.186V3.28a.186.186 0 0 0-.185-.186h-2.119a.186.186 0 0 0-.185.186v1.89c0 .103.083.186.185.186Zm0-2.72h2.119a.186.186 0 0 0 .185-.186V.56a.185.185 0 0 0-.185-.186h-2.119a.186.186 0 0 0-.185.186v1.89c0 .103.083.186.185.186Zm2.955 5.44h2.118a.185.185 0 0 0 .186-.186V6a.185.185 0 0 0-.186-.186h-2.118a.185.185 0 0 0-.185.186v1.89c0 .103.083.186.185.186Z"></path>
    				</svg>
    			</div>
    			<h1 class="title">Docker Hub 镜像搜索</h1>
    			<p class="subtitle">快速查找、下载和部署 Docker 容器镜像</p>
    			<div class="search-container">
    				<input type="text" id="search-input" placeholder="输入关键词搜索镜像，如: nginx, mysql, redis...">
    				<button id="search-button" title="搜索">
    					<svg focusable="false" aria-hidden="true" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
    						<path d="M21 21L16.65 16.65M19 11C19 15.4183 15.4183 19 11 19C6.58172 19 3 15.4183 3 11C3 6.58172 6.58172 3 11 3C15.4183 3 19 6.58172 19 11Z" stroke="white" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"></path>
    					</svg>
    				</button>
    			</div>
    			<p class="tips">提示：按回车键快速搜索</p>
    		</div>
    		<script>
    		function performSearch() {
    			const query = document.getElementById('search-input').value;
    			if (query) {
    				window.location.href = '/search?q=' + encodeURIComponent(query);
    			}
    		}
    		document.getElementById('search-button').addEventListener('click', performSearch);
    		document.getElementById('search-input').addEventListener('keypress', function(event) {
    			if (event.key === 'Enter') {
    				performSearch();
    			}
    		});
    		</script>
    	</body>
    	</html>
    	`;
    	return html;
    }
    export default {
    	async fetch(request, env, ctx) {
    		const getReqHeader = (key) => request.headers.get(key); // 获取请求头
    		let url = new URL(request.url); // 解析请求URL
    		const userAgentHeader = request.headers.get('User-Agent');
    		const userAgent = userAgentHeader ? userAgentHeader.toLowerCase() : "null";
    		if (env.UA) 屏蔽爬虫UA = 屏蔽爬虫UA.concat(await ADD(env.UA));
    		const workers_url = `https://${url.hostname}`;
    		// 获取请求参数中的 ns
    		const ns = url.searchParams.get('ns');
    		const hostname = url.searchParams.get('hubhost') || url.hostname;
    		const hostTop = hostname.split('.')[0]; // 获取主机名的第一部分
    		let checkHost; // 在这里定义 checkHost 变量
    		// 如果存在 ns 参数，优先使用它来确定 hub_host
    		if (ns) {
    			if (ns === 'docker.io') {
    				hub_host = 'registry-1.docker.io'; // 设置上游地址为 registry-1.docker.io
    			} else {
    				hub_host = ns; // 直接使用 ns 作为 hub_host
    			}
    		} else {
    			checkHost = routeByHosts(hostTop);
    			hub_host = checkHost[0]; // 获取上游地址
    		}
    		const fakePage = checkHost ? checkHost[1] : false; // 确保 fakePage 不为 undefined
    		console.log(`域名头部: ${hostTop} 反代地址: ${hub_host} 伪装首页: ${fakePage}`);
    		if (屏蔽爬虫UA.some(fxxk => userAgent.includes(fxxk)) && 屏蔽爬虫UA.length > 0) {
    			// 首页改成一个nginx伪装页
    			return new Response(await nginx(), {
    				headers: {
    					'Content-Type': 'text/html; charset=UTF-8',
    				},
    			});
    		} else if (userAgent && userAgent.includes('mozilla')) {
    			if (url.pathname == '/') {
    				return new Response(await searchInterface(), {
    					headers: {
    						'Content-Type': 'text/html; charset=UTF-8',
    					},
    				});
    			} else {
    				url.hostname = 'registry.hub.docker.com';
    				const newRequest = new Request(url, request);
    				return fetch(newRequest);
    			}
    		}
    		// 修改包含 %2F 和 %3A 的请求
    		if (!/%2F/.test(url.search) && /%3A/.test(url.toString())) {
    			let modifiedUrl = url.toString().replace(/%3A(?=.*?&)/, '%3Alibrary%2F');
    			url = new URL(modifiedUrl);
    			console.log(`handle_url: ${url}`);
    		}
    		// 处理token请求
    		if (url.pathname.includes('/token')) {
    			let token_parameter = {
    				headers: {
    					'Host': 'auth.docker.io',
    					'User-Agent': getReqHeader("User-Agent"),
    					'Accept': getReqHeader("Accept"),
    					'Accept-Language': getReqHeader("Accept-Language"),
    					'Accept-Encoding': getReqHeader("Accept-Encoding"),
    					'Connection': 'keep-alive',
    					'Cache-Control': 'max-age=0'
    				}
    			};
    			let token_url = auth_url + url.pathname + url.search;
    			return fetch(new Request(token_url, request), token_parameter);
    		}
    		// 修改 /v2/ 请求路径
    		if (hub_host == 'registry-1.docker.io' && /^\/v2\/[^/]+\/[^/]+\/[^/]+$/.test(url.pathname) && !/^\/v2\/library/.test(url.pathname)) {
    			//url.pathname = url.pathname.replace(/\/v2\//, '/v2/library/');
    			url.pathname = '/v2/library/' + url.pathname.split('/v2/')[1];
    			console.log(`modified_url: ${url.pathname}`);
    		}
    		// 更改请求的主机名
    		url.hostname = hub_host;
    		// 构造请求参数
    		let parameter = {
    			headers: {
    				'Host': hub_host,
    				'User-Agent': getReqHeader("User-Agent"),
    				'Accept': getReqHeader("Accept"),
    				'Accept-Language': getReqHeader("Accept-Language"),
    				'Accept-Encoding': getReqHeader("Accept-Encoding"),
    				'Connection': 'keep-alive',
    				'Cache-Control': 'max-age=0'
    			},
    			cacheTtl: 3600 // 缓存时间
    		};
    		// 添加Authorization头
    		if (request.headers.has("Authorization")) {
    			parameter.headers.Authorization = getReqHeader("Authorization");
    		}
    		// 添加可能存在字段X-Amz-Content-Sha256
    		if (request.headers.has("X-Amz-Content-Sha256")) {
    			parameter.headers['X-Amz-Content-Sha256'] = getReqHeader("X-Amz-Content-Sha256");
    		}
    		// 发起请求并处理响应
    		let original_response = await fetch(new Request(url, request), parameter);
    		let original_response_clone = original_response.clone();
    		let original_text = original_response_clone.body;
    		let response_headers = original_response.headers;
    		let new_response_headers = new Headers(response_headers);
    		let status = original_response.status;
    		// 修改 Www-Authenticate 头
    		if (new_response_headers.get("Www-Authenticate")) {
    			let auth = new_response_headers.get("Www-Authenticate");
    			let re = new RegExp(auth_url, 'g');
    			new_response_headers.set("Www-Authenticate", response_headers.get("Www-Authenticate").replace(re, workers_url));
    		}
    		// 处理重定向
    		if (new_response_headers.get("Location")) {
    			const location = new_response_headers.get("Location");
    			console.info(`Found redirection location, redirecting to ${location}`);
    			return httpHandler(request, location, hub_host);
    		}
    		// 返回修改后的响应
    		let response = new Response(original_text, {
    			status,
    			headers: new_response_headers
    		});
    		return response;
    	}
    };
    /**
     * 处理HTTP请求
     * @param {Request} req 请求对象
     * @param {string} pathname 请求路径
     * @param {string} baseHost 基地址
     */
    function httpHandler(req, pathname, baseHost) {
    	const reqHdrRaw = req.headers;
    	// 处理预检请求
    	if (req.method === 'OPTIONS' &&
    		reqHdrRaw.has('access-control-request-headers')
    	) {
    		return new Response(null, PREFLIGHT_INIT);
    	}
    	let rawLen = '';
    	const reqHdrNew = new Headers(reqHdrRaw);
    	const refer = reqHdrNew.get('referer');
    	let urlStr = pathname;
    	const urlObj = newUrl(urlStr, 'https://' + baseHost);
    	/** @type {RequestInit} */
    	const reqInit = {
    		method: req.method,
    		headers: reqHdrNew,
    		redirect: 'follow',
    		body: req.body
    	};
    	return proxy(urlObj, reqInit, rawLen);
    }
    /**
     * 代理请求
     * @param {URL} urlObj URL对象
     * @param {RequestInit} reqInit 请求初始化对象
     * @param {string} rawLen 原始长度
     */
    async function proxy(urlObj, reqInit, rawLen) {
    	const res = await fetch(urlObj.href, reqInit);
    	const resHdrOld = res.headers;
    	const resHdrNew = new Headers(resHdrOld);
    	// 验证长度
    	if (rawLen) {
    		const newLen = resHdrOld.get('content-length') || '';
    		const badLen = (rawLen !== newLen);
    		if (badLen) {
    			return makeRes(res.body, 400, {
    				'--error': `bad len: ${newLen}, except: ${rawLen}`,
    				'access-control-expose-headers': '--error',
    			});
    		}
    	}
    	const status = res.status;
    	resHdrNew.set('access-control-expose-headers', '*');
    	resHdrNew.set('access-control-allow-origin', '*');
    	resHdrNew.set('Cache-Control', 'max-age=1500');
    	// 删除不必要的头
    	resHdrNew.delete('content-security-policy');
    	resHdrNew.delete('content-security-policy-report-only');
    	resHdrNew.delete('clear-site-data');
    	return new Response(res.body, {
    		status,
    		headers: resHdrNew
    	});
    }
    async function ADD(envadd) {
    	var addtext = envadd.replace(/[	 |"'\r\n]+/g, ',').replace(/,+/g, ',');	// 将空格、双引号、单引号和换行符替换为逗号
    	if (addtext.charAt(0) == ',') addtext = addtext.slice(1);
    	if (addtext.charAt(addtext.length - 1) == ',') addtext = addtext.slice(0, addtext.length - 1);
    	const add = addtext.split(',');
    	return add;
    }



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