GitHub 無服務器代理工具
GitHub 國內下載速度時快時慢，很不穩定。使用 Cloudflare 的 Workers 可以作為中轉站進行代理加速下載。
Workers 免費版可以接收 10W/day、1K/min 請求，個人使用是完全沒問題的。Cloudflare 注冊僅需郵箱認證即可。
注冊賬戶
點擊此處開始注冊，認證完成后，即可使用服務。
搭建 Github 代理加速服務
- 給自己的 Workers 起一個好的二級域名，最少三個字符。假設為
example
選擇免費版，即可看到下面的頁面。
- 點擊新建服務，為服務命名。然后點擊創建服務。假設為
githubproxy,則該項目的域名為githubproxy.example.wokers.dev
- 點擊新創建的服務后，選擇編輯
- 粘貼下面的js代碼
'use strict' /** * static files (404.html, sw.js, conf.js) */ const ASSET_URL = 'https://xx.xx.workers.dev/' // 前綴，如果自定義路由為example.com/gh/*，將PREFIX改為 '/gh/'，注意，少一個杠都會錯！ const PREFIX = '/' // 分支文件使用jsDelivr鏡像的開關，0為關閉，默認開啟 const Config = { jsdelivr: 1 } /** @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', }), } 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 /** * @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) }) function checkUrl(u) { for (let i of [exp1, exp2, exp3, exp4, exp5, exp6]) { if (u.search(i) === 0) { return true } } return false } /** * @param {FetchEvent} e */ async function fetchHandler(e) { const req = e.request const urlStr = req.url const urlObj = new URL(urlStr) let path = urlObj.searchParams.get('q') if (path) { return Response.redirect('https://' + urlObj.host + PREFIX + path, 301) } // cfworker 會把路徑中的 `//` 合並成 `/` path = urlObj.href.substr(urlObj.origin.length + PREFIX.length).replace(/^https?:\/+/, 'https://') if (path.search(exp1) === 0 || path.search(exp5) === 0 || path.search(exp6) === 0 || path.search(exp3) === 0 || path.search(exp4) === 0) { 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) } } /** * @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) } const reqHdrNew = new Headers(reqHdrRaw) let urlStr = pathname if (urlStr.startsWith('github')) { urlStr = 'https://' + urlStr } const urlObj = newUrl(urlStr) /** @type {RequestInit} */ const reqInit = { method: req.method, headers: reqHdrNew, redirect: 'manual', body: req.body } return proxy(urlObj, reqInit) } /** * * @param {URL} urlObj * @param {RequestInit} reqInit */ async function proxy(urlObj, reqInit) { const res = await fetch(urlObj.href, reqInit) const resHdrOld = res.headers const resHdrNew = new Headers(resHdrOld) const status = res.status if (resHdrNew.has('location')) { let _location = resHdrNew.get('location') if (checkUrl(_location)) resHdrNew.set('location', PREFIX + _location) else { reqInit.redirect = 'follow' return proxy(newUrl(_location), reqInit) } } resHdrNew.set('access-control-expose-headers', '*') resHdrNew.set('access-control-allow-origin', '*') 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, }) } - 修改上面文件中
ASSET_URL，設置為該項目所屬域名，本案例中即為https://githubproxy.example.workers.dev/。
使用
將 GitHub 資源鏈接直接加在 https://githubproxy.example.workers.dev/ 后即可。
以下都是合法輸入（僅示例，文件不存在）：