前言
近期，由于一些原因导致无法正常拉取docker镜像（或者拉取速度极慢），而且国内dockerhub加速镜像相继下架，如果设置服务器的代理会增加一层nat和产生额外配置修改。
这里使用代理方式，以小改动、影响继续使用官方dockerhub。
从docker自身上修改可以有两个方案
- 使用其它镜像源
- 使用代理
- cloudflare worker建加速镜像源
cf worker加速镜像源
域名dns解析托管在cf）
1.访问Cloudflare Workers构建`Workers应用程序
2.命名，完成，编辑代码
3. 编辑代码 完成应用
'use strict';
const HUB_HOST = 'registry-1.docker.io';
const AUTH_URL = 'https://auth.docker.io';
const WORKERS_URL = 'https://你的域名';
const ASSET_URL = 'https://hunshcn.github.io/gh-proxy/';
const PREFIX = '/';
const Config = { jsdelivr: 0 };
const whiteList = [];
const exp1 = /^(?:https?:\/\/)?github\.com\/.+?\/.+?\/(?:releases|archive)\/.*/i;
const exp2 = /^(?:https?:\/\/)?github\.com\/.+?\/.+?\/(?:blob|raw)\/.*/i;
const exp3 = /^(?:https?:\/\/)?github\.com\/.+?\/.+?\/(?:info|git-).*/i;
const exp4 = /^(?:https?:\/\/)?raw\.(?:githubusercontent|github)\.com\/.+?\/.+?\/.+?\/.+/i;
const exp5 = /^(?:https?:\/\/)?gist\.(?:githubusercontent|github)\.com\/.+?\/.+?\/.+/i;
const exp6 = /^(?:https?:\/\/)?github\.com\/.+?\/.+?\/tags.*/i;
/** @type {RequestInit} */
const PREFLIGHT_INIT = {
// @ts-ignore
status: 204,
headers: new Headers({
'access-control-allow-origin': '*',
'access-control-allow-methods': 'GET, POST, PUT, PATCH, TRACE, DELETE, HEAD, OPTIONS',
'access-control-max-age': '1728000',
}),
};
/**
* Create a new response.
* @param {any} body
* @param {number} [status=200]
* @param {Object<string, string>} headers
* @returns {Response}
*/
function makeResponse(body, status = 200, headers = {}) {
headers['access-control-allow-origin'] = '*';
return new Response(body, { status, headers });
}
/**
* Create a new URL object.
* @param {string} urlStr
* @returns {URL|null}
*/
function createURL(urlStr) {
try {
return new URL(urlStr);
} catch (err) {
return null;
}
}
addEventListener('fetch', (event) => {
event.respondWith(handleFetchEvent(event).catch(err => makeResponse(`cfworker error:\n{err.stack}`, 502)));
});
/**
* Handle the fetch event.
* @param {FetchEvent} event
* @returns {Promise<Response>}
*/
async function handleFetchEvent(event) {
const req = event.request;
let url = new URL(req.url);
// 修改pre head get请求
// 是否含有 %2F，用于判断是否具有用户名与仓库名之间的连接符
// 同时检查 %3A 的存在
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}`)
}
if (url.pathname.startsWith('/token') || url.pathname.startsWith('/v2')) {
return handleDockerProxy(req, url);
}
if (url.pathname.startsWith(PREFIX)) {
return handleGitHubProxy(req, url);
}
return makeResponse('Not Found', 404);
}
/**
* Handle token requests and Docker proxy.
* @param {Request} req
* @param {URL} url
* @returns {Promise<Response>}
*/
async function handleDockerProxy(req, url) {
if (url.pathname === '/token') {
const tokenURL = AUTH_URL + url.pathname + url.search;
const headers = new Headers({
'Host': 'auth.docker.io',
'User-Agent': req.headers.get('User-Agent'),
'Accept': req.headers.get('Accept'),
'Accept-Language': req.headers.get('Accept-Language'),
'Accept-Encoding': req.headers.get('Accept-Encoding'),
'Connection': 'keep-alive',
'Cache-Control': 'max-age=0'
});
return fetch(new Request(tokenURL, req), { headers });
}
// 修改head请求
if (/^\/v2\/[^/]+\/[^/]+\/[^/]+/.test(url.pathname) && !/^\/v2\/library/.test(url.pathname)) {
url.pathname = url.pathname.replace(/\/v2\//, '/v2/library/');
console.log(`modified_url:{url.pathname}`)
}
url.hostname = HUB_HOST;
const headers = new Headers({
'Host': HUB_HOST,
'User-Agent': req.headers.get('User-Agent'),
'Accept': req.headers.get('Accept'),
'Accept-Language': req.headers.get('Accept-Language'),
'Accept-Encoding': req.headers.get('Accept-Encoding'),
'Connection': 'keep-alive',
'Cache-Control': 'max-age=0'
});
if (req.headers.has('Authorization')) {
headers.set('Authorization', req.headers.get('Authorization'));
}
const response = await fetch(new Request(url, req), { headers });
const responseHeaders = new Headers(response.headers);
const status = response.status;
if (responseHeaders.get('Www-Authenticate')) {
const authHeader = responseHeaders.get('Www-Authenticate');
const re = new RegExp(AUTH_URL, 'g');
responseHeaders.set('Www-Authenticate', authHeader.replace(re, WORKERS_URL));
}
if (responseHeaders.get('Location')) {
return handleHttpRedirect(req, responseHeaders.get('Location'));
}
responseHeaders.set('access-control-expose-headers', '*');
responseHeaders.set('access-control-allow-origin', '*');
responseHeaders.set('Cache-Control', 'max-age=1500');
responseHeaders.delete('Content-Security-Policy');
responseHeaders.delete('Content-Security-Policy-Report-Only');
responseHeaders.delete('Clear-Site-Data');
return new Response(response.body, { status, headers: responseHeaders });
}
/**
* Handle GitHub proxy requests.
* @param {Request} req
* @param {URL} url
* @returns {Promise<Response>}
*/
async function handleGitHubProxy(req, url) {
let path = url.searchParams.get('q');
if (path) {
return Response.redirect('https://' + url.host + PREFIX + path, 301);
}
path = url.href.substr(url.origin.length + PREFIX.length).replace(/^https?:\/+/, 'https://');
if (checkUrl(path)) {
return httpHandler(req, path);
} else if (path.search(exp2) === 0) {
if (Config.jsdelivr) {
const newUrl = path.replace('/blob/', '@').replace(/^(?:https?:\/\/)?github\.com/, 'https://cdn.jsdelivr.net/gh');
return Response.redirect(newUrl, 302);
} else {
path = path.replace('/blob/', '/raw/');
return httpHandler(req, path);
}
} else if (path.search(exp4) === 0) {
const newUrl = path.replace(/(?<=com\/.+?\/.+?)\/(.+?\/)/, '@$1').replace(/^(?:https?:\/\/)?raw\.(?:githubusercontent|github)\.com/, 'https://cdn.jsdelivr.net/gh');
return Response.redirect(newUrl, 302);
} else {
return fetch(ASSET_URL + path);
}
}
/**
* Check if the URL matches GitHub patterns.
* @param {string} url
* @returns {boolean}
*/
function checkUrl(url) {
return [exp1, exp2, exp3, exp4, exp5, exp6].some(exp => url.search(exp) === 0);
}
/**
* Handle HTTP redirects.
* @param {Request} req
* @param {string} location
* @returns {Promise<Response>}
*/
async function handleHttpRedirect(req, location) {
const url = createURL(location);
if (!url) {
return makeResponse('Invalid URL', 400);
}
return proxyRequest(url, req);
}
/**
* Handle HTTP requests.
* @param {Request} req
* @param {string} pathname
* @returns {Promise<Response>}
*/
async function httpHandler(req, pathname) {
if (req.method === 'OPTIONS' && req.headers.has('access-control-request-headers')) {
return new Response(null, PREFLIGHT_INIT);
}
const headers = new Headers(req.headers);
let flag = !whiteList.length;
for (const i of whiteList) {
if (pathname.includes(i)) {
flag = true;
break;
}
}
if (!flag) {
return new Response('blocked', { status: 403 });
}
if (pathname.search(/^https?:\/\//) !== 0) {
pathname = 'https://' + pathname;
}
const url = createURL(pathname);
return proxyRequest(url, { method: req.method, headers, body: req.body });
}
/**
* Proxy a request.
* @param {URL} url
* @param {RequestInit} reqInit
* @returns {Promise<Response>}
*/
async function proxyRequest(url, reqInit) {
const response = await fetch(url.href, reqInit);
const responseHeaders = new Headers(response.headers);
if (responseHeaders.has('location')) {
const location = responseHeaders.get('location');
if (checkUrl(location)) {
responseHeaders.set('location', PREFIX + location);
} else {
reqInit.redirect = 'follow';
return proxyRequest(createURL(location), reqInit);
}
}
responseHeaders.set('access-control-expose-headers', '*');
responseHeaders.set('access-control-allow-origin', '*');
responseHeaders.delete('content-security-policy');
responseHeaders.delete('content-security-policy-report-only');
responseHeaders.delete('clear-site-data');
return new Response(response.body, {
status: response.status,
headers: responseHeaders,
});
}
4.完成部署
（此为融合docker pull加速和github下载，来自用GPT融了一个Cloudflare Workers的github下载 + Docke pull加速 – 软件开发 – LINUX DO）
WORKERS_URL修改为自己的域名
当前为二次修改，原版本无法直接拉取dockerhub官方镜像，需要加上域名/library/xx，改动处有
- 65、66行，添加修改head前的get请求
- 98行，添加修改head请求
点击该workers项目的设置–触发器，添加路由，填写：
– 路由：自己的域名（后面带有\/*）
自己的域名/*
测试
# docker pull docker.echol.top/node
Using default tag: latest
latest: Pulling from node
e9aef93137af: Pull complete
58b365fa3e8d: Pull complete
3dbed71fc544: Pull complete
ae70830af8b6: Pull complete
d0078cb5df45: Pull complete
11ee31c98c92: Pull complete
b067ecbfab4f: Pull complete
65fcc43c3afb: Pull complete
Digest: sha256:2558f19e787cb0baed81a8068adf7509023b43dedce24ed606f8a01522b21313
Status: Downloaded newer image for docker.echol.top/node:latest
docker.echol.top/node:latest
