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| 'use strict'
const hub_host = 'registry-1.docker.io' const auth_url = 'https://auth.docker.io' const workers_url = '这里填你的下一级域名,有人用的二级有人可能用三级域名,等等' /** * 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);
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) }
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, 0) }
/** * * @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 }) }
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