gh-proxy – 利用CloudflareWorkers加速Github代下载代码教程

源码简介

使用国内的云服务器时,对于Github是极其不友好的,经常无法连接上raw.githubusercontent.com域名也是已经凉凉,git clone能连上的时候也是龟速。所幸,发现了这一款工具,用过之后感觉浑身舒爽。

gh-proxy支持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。

在线演示

可参考本站搭建的站点:https://github.mcheng.workers.dev/

使用方法

加速下载文件

打开https://github.mcheng.workers.dev/ 然后输入要加速的链接(如release文件等)或者直接在链接前面加上https://github.mcheng.workers.dev/

示例:

https://raw.githubusercontent.com/username/xxxxx/xxxxx变成https://github.mcheng.workers.dev/raw.githubusercontent.com/username/xxxxx/xxxxx

加速clone

git clone https://github.com/username/xxx.git换成git clone https://github.mcheng.workers.dev/github.com/username/xxx.git

更多使用方法请看:Github

cf worker部署教程

首页:https://workers.cloudflare.com

注册,登陆,Start building,取一个子域名,Create a Worker

复制 index.js 或者下面部署代码到左侧代码框,Save and deploy。如果正常,右侧应显示首页。

index.js默认配置下clonegithub.com.cnpmjs.org,项目文件会走jsDeliver,如需走worker,修改Config变量即可

ASSET_URL是静态资源的url(实际上就是现在显示出来的那个输入框单页面)

PREFIX是前缀,默认(根路径情况为"/"),如果自定义路由为example.com/gh/*,请将PREFIX改为 '/gh/',注意,少一个杠都会错!

部署代码

'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',
    }),
}

/**
 * @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 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://')
    const exp1 = /^(?:https?:\/\/)?github\.com\/.+?\/.+?\/(?:releases|archive)\/.*$/i
    const exp2 = /^(?:https?:\/\/)?github\.com\/.+?\/.+?\/(?:blob)\/.*$/i
    const exp3 = /^(?:https?:\/\/)?github\.com\/.+?\/.+?\/(?:info|git-).*$/i
    const exp4 = /^(?:https?:\/\/)?raw\.githubusercontent\.com\/.+?\/.+?\/.+?\/.+$/i
    if (path.search(exp1) === 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\.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)
    }

    let rawLen = ''

    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: '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.delete('content-security-policy')
    resHdrNew.delete('content-security-policy-report-only')
    resHdrNew.delete('clear-site-data')

    return new Response(res.body, {
        status,
        headers: resHdrNew,
    })
}

Python部署教程

Docker部署

docker run -d --name="gh-proxy-py" \
  -p 0.0.0.0:80:80 \
  --restart=always \
  hunsh/gh-proxy-py:latest

第一个80是你要暴露出去的端口,可自定义修改后反代

直接部署

安装依赖(请使用python3)

git clone https://github.com/hunshcn/gh-proxy
cd gh-proxy
pip install flask requests

按需求修改app/main.py的前几项配置

python版本的机器如果无法正常访问github.io会启动报错,请自行修改静态文件url 默认配置下clone走github.com.cnpmjs.org,项目文件会走jsDeliver,如需走服务器,修改配置即可

注意事项

到 overview 页面可参看使用情况。免费版每天有 10 万次免费请求,并且有每分钟1000次请求的限制。

如果不够用,可升级到 $5 的高级版本,每月可用 1000 万次请求(超出部分 $0.5/百万次请求)。

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