之前写了 免费开源的GitHub图床管理工具-PicX,结果用着用着,内置的几个 CDN 加速提供商不是今天这个不行了就是明天那个不行了,搜索了一下 Cloudflare 加速,找到一个开源项目:
https://github.com/hunshcn/gh-proxy

使用 Cloudflare Workers 无服务器版本部署

登录 https://workers.cloudflare.com,创建应用程序->创建 worker。
打开 https://github.com/hunshcn/gh-proxy 复制 index.js 的代码到左侧代码框,保存并部署。
如果正常,右侧预览应显示首页。

index.js 代码前面几行为自定义配置,注释很清楚。
如果防止他人滥用,可将 GitHub 登录名加进去白名单 ['/username/']

私有仓库加速格式如下:

https://user:[email protected]/https://github.com/xxxxxx/xxxxxx

  • GitHub 创建 TOKEN ,替换上面的 ghp_xxxxx
  • 部署的链接替换 ghproxy.com
  • user 不用替换
'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 = '/'
// 分支文件使用jsDelivr镜像的开关,0为关闭,默认关闭
const Config = {
jsdelivr: 0
}
const whiteList = [] // 白名单,路径里面有包含字符的才会通过,e.g. ['/username/']
/** @type {ResponseInit} */
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 || 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
let flag = !Boolean(whiteList.length)
for (let i of whiteList) {
if (urlStr.includes(i)) {
flag = true
break
}
}
if (!flag) {
return new Response("blocked", {status: 403})
}
if (urlStr.search(/^https?:\/\//) !== 0) {
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,
})
}

部署后可在设置里面添加自定义域名,比如:https://github.mianao.info

PicX 配置

打开 PicX 图床设置,图片链接规则配置:
CloudflareCDN

新建一个规则:

https://github.mianao.info/https://raw.githubusercontent.com/{{owner}}/{{repo}}/{{branch}}/{{path}}

收工。