Cloudflare cf使用workers搭建一个简单的免费页面反代系统，不符合HTTP协议标准规范但是能凑合用，腾讯云函数已经收费
Cloudflare cf使用workers搭建一个简单的免费页面反代系统，不符合HTTP协议标准规范但是能凑合用，腾讯云函数已经收费比如说，刚刚更新了下方代码，符合HTTP协议标准，已经支持响应206状态码
放入workers即可使用，无需更改。注意绑定自己的自定义域名。
addEventListener('fetch', event => {
event.passThroughOnException()
event.respondWith(handleRequest(event))
})
/**
* Respond to the request
* @param {Request} request
*/
async function handleRequest(event) {
const { request } = event;
//请求头部、返回对象
let reqHeaders = new Headers(request.headers),
outBody, outStatus = 200, outStatusText = 'OK', outCt = null, outHeaders = new Headers({
"Access-Control-Allow-Origin": reqHeaders.get('Origin'),
"Access-Control-Allow-Methods": "GET, POST, PUT, PATCH, DELETE, OPTIONS",
"Access-Control-Allow-Headers": reqHeaders.get('Access-Control-Allow-Headers') || "Accept, Authorization, Cache-Control, Content-Type, DNT, If-Modified-Since, Keep-Alive, Origin, User-Agent, X-Requested-With, Token, x-access-token, Notion-Version"
});
try {
//取域名第一个斜杠后的所有信息为代理链接
let url = request.url.substr(8);
url = decodeURIComponent(url.substr(url.indexOf('/') + 1));
//需要忽略的代理
if (request.method == "OPTIONS" && reqHeaders.has('access-control-request-headers')) {
//输出提示
return new Response(null, PREFLIGHT_INIT)
}
else if(url.length < 3 || url.indexOf('.') == -1 || url == "favicon.ico" || url == "robots.txt") {
return Response.redirect('https://baidu.com', 301)
}
//阻断
else if (blocker.check(url)) {
return Response.redirect('https://baidu.com', 301)
}
else {
//补上前缀 http://
url = url.replace(/https:(\/)*/,'https://').replace(/http:(\/)*/, 'http://')
if (url.indexOf("://") == -1) {
url = "http://" + url;
}
//构建 fetch 参数
let fp = {
method: request.method,
headers: {}
}
//保留头部其它信息
let he = reqHeaders.entries();
for (let h of he) {
if (!['content-length'].includes(h)) {
fp.headers] = h;
}
}
// 是否带 body
if (["POST", "PUT", "PATCH", "DELETE"].indexOf(request.method) >= 0) {
const ct = (reqHeaders.get('content-type') || "").toLowerCase();
if (ct.includes('application/json')) {
let requestJSON = await request.json()
console.log(typeof requestJSON)
fp.body = JSON.stringify(requestJSON);
} else if (ct.includes('application/text') || ct.includes('text/html')) {
fp.body = await request.text();
} else if (ct.includes('form')) {
fp.body = await request.formData();
} else {
fp.body = await request.blob();
}
}
// 发起 fetch
let fr = (await fetch(url, fp));
outCt = fr.headers.get('content-type');
if(outCt && (outCt.includes('application/text') || outCt.includes('text/html'))) {
try {
// 添加base
let newFr = new HTMLRewriter()
.on("head", {
element(element) {
element.prepend(`<base href="${url}" />`, {
html: true
})
},
})
.transform(fr)
fr = newFr
} catch(e) {
}
}
for (const of fr.headers.entries()) {
outHeaders.set(key, value);
}
outStatus = fr.status;
outStatusText = fr.statusText;
outBody = fr.body;
}
} catch (err) {
outCt = "application/json";
outBody = JSON.stringify({
code: -1,
msg: JSON.stringify(err.stack) || err
});
}
//设置类型
if (outCt && outCt != "") {
outHeaders.set("content-type", outCt);
}
let response = new Response(outBody, {
status: outStatus,
statusText: outStatusText,
headers: outHeaders
})
return response;
// return new Response('OK', { status: 200 })
}
/**
* 阻断器
*/
const blocker = {
keys: [".m3u8", ".ts", ".acc", ".m4s", "photocall.tv", "googlevideo.com"],
check: function (url) {
url = url.toLowerCase();
let len = blocker.keys.filter(x => url.includes(x)).length;
return len != 0;
}
}
workers反代使用方式
https://workers绑定的自定义域名/https://bmd.itzmx.com/static/image/common/logo.png
反代支持301跳转跟随来始终以https发起，目标域名不带http和带http均为http发起（如果301则为https发起），目标带https时候则强制以https发起（会校验TLS证书有效性，不允许反代目标域名为自签名）
cf反代回源站所传递的ip地址：2a06:98c0:3600::103
Cloudflare customer zone, the CF-Connecting-IP value will be set to the Worker client IP address '2a06:98c0:3600::103' for security reasons.
数据来自官方文档：https://developers.cloudflare.com/workers/runtime-apis/headers/
提醒，请勿滥用，cf反代服务器每天限量10W次下载，每日早晨8点刷新配额。
CF反代代码没做ip地址支持，仅支持域名，反代能访问 1.1.1.1 1.1.1.2 1.1.1.3 1.0.0.1 1.0.0.2 1.0.0.3 这几个ip，其它ip都不允许直接访问
https://反代地址/https://1.1.1.1/cdn-cgi/trace 可以改成这样用来检测cf反代在线状态，非200状态码代表无法使用。反代超10W每日配额时是输出429状态码。
腾讯云函数也可以实现相同的效果：https://curl.qcloud.com/W4ANcAUL
但是收费了就不介绍了。
自己有服务器，想用kangle搭建一个网络更快的，只需操作文章中说的“国内服务器"
https://bbs.itzmx.com/thread-100060-1-1.html
用kangle自建时建议hosts文件绑定国内备案域名用国内反代服务器，需要使用https，例如反代地址 pikpak.oss-cn-hangzhou.aliyuncs.com 证书文件要在电脑上受信一下
https://bbs.itzmx.com/thread-90800-1-1.html
一个生成的证书例子：https://bbs.itzmx.com/thread-90896-1-1.html
既然有反代那就要有屏蔽的方法
网站屏蔽Cloudflare cf使用workers搭建的反代爬虫bot，REMOTE_ADDR header头部禁止 2a06:98c0:3600::103 ipv6地址，非真实浏览器禁止访问
https://bbs.itzmx.com/thread-101376-1-1.html
小樱啥时候出个比特彗星下载百度网盘的完整教程鸭
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