Foreword
今天看到了一个加速GitHub下载的,有点意思,操作了一下,很快,5分钟不到就好了
CloudFlare Workers
首先反代本质上是靠CloudFlare的国内CDN加速,然后通过Workers创建无服务的程序,主要是靠JS完成代理。
本身免费的服务一天可以有10w次请求,只是小范围使用完全够用了。
先创建一个服务,服务名称随意,选择显示简单HTML网页的Woker处理程序,创建服务
然后进入快速编辑页面
将以下内容复制到左侧代码区域,然后点击保存并部署
'use strict'
/**
* static files (404.html, sw.js, conf.js)
*/
const ASSET_URL = 'https://hunshcn.github.io/gh-proxy/'
// 前缀,如果自定义路由为example.com/gh/*,将PREFIX改为 '/gh/',注意,少一个杠都会错!
const PREFIX = '/'
// git使用cnpmjs镜像、分支文件使用jsDelivr镜像的开关,0为关闭,默认开启
const Config = {
jsdelivr: 1,
cnpmjs: 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 会把路径中的 `//` 合并成 `/`
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 || !Config.cnpmjs && (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(exp3) === 0) {
const newUrl = path.replace(/^(?:https?:\/\/)?github\.com/, 'https://github.com.cnpmjs.org')
return Response.redirect(newUrl, 302)
} 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,
})
}
透过预览刷新,就能看到页面了,这个url就可以分享给其他人了
然后就可以通过worker给出来的链接进行加速访问了。
https://proxygithub.elmagnificoheroku.workers.dev/
gh-proxy
https://github.com/hunshcn/gh-proxy
这个项目来自于gh-proxy,github release、archive以及项目文件的加速项目,支持clone,有Cloudflare Workers无服务器版本以及Python版本。
默认配置下clone走github.com.cnpmjs.org,项目文件会走jsDeliver,如需走worker,修改Config变量即可
python的版本功能更强大一些,只不过需要vps来搭建,不能用这种serverless了
如果想修改展示出来的静态页面,可以fork这个仓库,然后改一下index就行了。
https://github.com/hunshcn/hunshcn.github.io
自定义Worker域名
想把刚才使用的worker域名替换成自己的,需要把自己的域名托管在CloudFlare上才行,否则就算你CNAME这个域名一样是无法跳转显示的index的(下载文件不受影响)
https://proxygithub.elmagnificoheroku.workers.dev/
首先自定义一个域名,比如gitproxy,内容无所谓是什么,主要是要切换成代理状态即可,剩下的交给CF就行了
然后在Workers中添加路由,选择刚才建好的服务和环境,就可以直接通过自定义的域名进行访问了
最后通过下面的链接就能访问的一样的加速页面了
http://gitproxy.elmagnifico.tech/
Summary
以后再遇到翻不了墙,下不了的就可以把这个链接丢给他,或者是直接在分享的github的链接前加上这个就行了。
Quote
https://www.abskoop.com/11425/
https://vircloud.net/exp/cf-worker-domain.html