测试JS代码显示效果
```
'use strict'
/**
* static files (404.html, sw.js, conf.js)
*/
const ASSET_URL = 'https://crazypeace.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 {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
const exp7 = /^(?:https?:\/\/)?api\.github\.com\/.*$/i
const exp8 = /^(?:https?:\/\/)?git\.io\/.*$/i
const exp9 = /^(?:https?:\/\/)?gitlab\.com\/.*$/i
/**
* @param {any} body
* @param {number} status
* @param {Object} 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, exp7, exp8, exp9]) {
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)
console.log("in:" +urlStr)
let path = urlObj.searchParams.get('q')
if (path) {
return Response.redirect('https://' + urlObj.host + PREFIX + path, 301)
}
path = urlObj.href.substr(urlObj.origin.length + PREFIX.length)
console.log ("path:" + path)
// 判断有没有嵌套自己调用自己
const exp0 = 'https:/' + urlObj.host + '/'
console.log ("exp0:" + exp0)
while (path.startsWith(exp0)) {
console.log ("in while")
path = path.replace(exp0, '')
}
console.log ("path:" + path)
// cfworker 会把路径中的 `//` 合并成 `/`
path = path.replace(/^https?:\/+/, 'https://')
console.log ("path:" + path)
if (path.search(exp1) === 0 || path.search(exp3) === 0 || path.search(exp4) === 0 || path.search(exp5) === 0 || path.search(exp6) === 0 || path.search(exp7) === 0 || path.search(exp8) === 0 || path.search(exp9) === 0) {
console.log("exp 1,3,4,5,6,7,8, 9")
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\/.+?\/.+?)\/(.+?\/)/, '@$1').replace(/^(?:https?:\/\/)?raw\.(?:githubusercontent|github)\.com/, 'https://cdn.jsdelivr.net/gh')
return Response.redirect(newUrl, 302)
} else if (path==='perl-pe-para') {
let perlstr = 'perl -pe'
let responseText = 's#(bash.*?\\.sh)([^/\\w\\d])#\\1 | ' + perlstr + ' "\\$(curl -L ' + urlObj.origin + '/perl-pe-para)" \\2#g; ' +
's# (git)# https://\\1#g; ' +
's#(http.*?git[^/]*?/)#' + urlObj.origin + '/\\1#g';
return new Response( responseText, { status: 200,
headers: {
'Content-Type': 'text/plain',
'Cache-Control': 'max-age=300'
}
});
} else {
console.log("fetch " + ASSET_URL + path)
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.startsWith('git')) {
urlStr = 'https://' + urlStr
}
console.log("urlStr "+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,
})
}
```
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