解决Docker国内镜像被封禁问题 - Cloudflare Workers方案

Workers 代码，记得更改 workers_url 为你自己的域名：

'use strict';

const hub_host = 'registry-1.docker.io';
const auth_url = 'https://auth.docker.io';
const workers_url = 'https://xxx.com';

/**
* static files (404.html, sw.js, conf.js)
*/

/** @type {RequestInit} */
const PREFLIGHT_INIT = {
// 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',
}),
};

/**
* @param {any} body
* @param {number} status
* @param {Object<string, string>} headers
*/
function makeRes(body, status = 200, headers = {}) {
headers['access-control-allow-origin'] = '*';
return new Response(body, { status, headers });
}

/**
* @param {string} urlStr
*/
function newUrl(urlStr) {
try {
return new URL(urlStr);
} catch (err) {
return null;
}
}

addEventListener('fetch', e => {
const ret = fetchHandler(e)
.catch(err => makeRes('cfworker error:\n' + err.stack, 502));
e.respondWith(ret);
});

/**
* @param {FetchEvent} e
*/
async function fetchHandler(e) {
const getReqHeader = (key) => e.request.headers.get(key);

let url = new URL(e.request.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 === '/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, e.request), token_parameter);
}

// 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;

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
};

if (e.request.headers.has("Authorization")) {
parameter.headers.Authorization = getReqHeader("Authorization");
}

let original_response = await fetch(new Request(url, e.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;

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));
}

if (new_response_headers.get("Location")) {
return httpHandler(e.request, new_response_headers.get("Location"));
}

let response = new Response(original_text, {
status,
headers: new_response_headers
});
return response;
}

/**
* @param {Request} req
* @param {string} pathname
*/
function httpHandler(req, pathname) {
const reqHdrRaw = req.headers;

// preflight
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);

/** @type {RequestInit} */
const reqInit = {
method: req.method,
headers: reqHdrNew,
redirect: 'follow',
body: req.body
};
return proxy(urlObj, reqInit, rawLen);
}

/**
*
* @param {URL} urlObj
* @param {RequestInit} reqInit
*/
async function proxy(urlObj, reqInit, rawLen) {
const res = await fetch(urlObj.href, reqInit);
const resHdrOld = res.headers;
const resHdrNew = new Headers(resHdrOld);

// verify
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');

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
});
}

例如您的Workers项目域名为：docker.imotao.cn；

docker pull docker.imotao.cn/stilleshan/frpc:latest

docker pull docker.imotao.cn/library/nginx:stable-alpine3.19-perl

修改文件 /etc/docker/daemon.json（如果不存在则创建）

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://docker.imotao.cn"]  # 请替换为您自己的Worker自定义域名
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker