白嫖Cloudflare Workers搭建Vless代理

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本文转载自：https://peanut996.com/vless-on-cloudflare-workers/

前置准备

域名
cloudflare 账号

准备工作是需要一个能够管理域名的cloudflare账号。

Workers简介

Workers 是Cloudflare推出的一项serverless产品，无需配置或维护基础架构即可创建全新的应用程序或扩充现有的应用程序。它允许开发者在全球分布的Cloudflare数据中心运行JavaScript/C/C++/Rust代码。这个服务使开发者能够在离用户更近的地方执行代码，从而提高网站性能和响应速度。

目前Free版本的账号提供每天10w次的调用，对于普通用户来说，完全够用！（不愧是你，活菩萨Cloudflare！）

搭建教程

首先需要感谢大佬的辛勤付出，目前因为害怕滥用违反TOS政策作者已经删库，走过路过的可以给大佬点个star

代码仓库： https://github.com/zizifn/edgetunnel

创建Worker

登陆cloudflare创建一个新的worker

然后回要求输入worker名称和代码，这里代码我们直接保留可以先不做改动，名称可以随便取。

生成UUID

因为vless要求一个独特的uuid，这里我们需要事先准备一个uuid，随便生成一个即可。生成的uuid需要保留横线，如15ba0eff-e227-4e94-9b2a-76d93d858865 即可

填充代码

下方粘贴了一个完整的代码块，但是仍然需要修改两个变量即可使用：

userID 这里直接填写刚刚生成的uuid即可
proxyIP 目前worker仍然存在bug，对于host在cf的网站访问会出现问题，所以对于这部分网站需要通过反向代理cf的服务器实现正常访问，代码注释中已经列举了一些常用的IP，如需寻找反代IP可以前去https://t.me/cf_push频道中获取。

// <!--GAMFC-->version base on commit 43fad05dcdae3b723c53c226f8181fc5bd47223e, time is 2023-06-22 15:20:02 UTC<!--GAMFC-END-->.
// @ts-ignore
import { connect } from 'cloudflare:sockets';

// 修改这里的userID为刚刚生成的uuid
let userID = 'd04fe0f8-bd1f-403a-9fc7-22dd254bb715';

// 下面地址选一个填写
// edgetunnel.anycast.eu.org（美国的加速CDN）
// cdn.anycast.eu.org（香港日本新加坡加速CDN）
// 香港优选IP： 20.187.89.16
// 韩国高速优选IP: 129.154.199.251
// 日本高速优选IP: 146.56.149.205
// cdn-all.xn--b6gac.eu.org
// cdn.xn--b6gac.eu.org
// cdn-b100.xn--b6gac.eu.org
// edgetunnel.anycast.eu.org
// cdn.anycast.eu.org
// let proxyIP = '47.74.51.138';
// let proxyIP = '130.61.20.4';
let proxyIP = '47.74.51.138';

if (!isValidUUID(userID)) {
throw new Error('uuid is not valid');
}

export default {
/**
* @param {import("@cloudflare/workers-types").Request} request
* @param {{UUID: string, PROXYIP: string}} env
* @param {import("@cloudflare/workers-types").ExecutionContext} ctx
* @returns {Promise<Response>}
*/
async fetch(request, env, ctx) {
try {
userID = env.UUID || userID;
proxyIP = env.PROXYIP || proxyIP;
const upgradeHeader = request.headers.get('Upgrade');
if (!upgradeHeader || upgradeHeader !== 'websocket') {
const url = new URL(request.url);
switch (url.pathname) {
case '/':
return new Response(JSON.stringify(request.cf), { status: 200 });
case `/${userID}`: {
const vlessConfig = getVLESSConfig(userID, request.headers.get('Host'));
return new Response(`${vlessConfig}`, {
status: 200,
headers: {
"Content-Type": "text/plain;charset=utf-8",
}
});
}
default:
return new Response('Not found', { status: 404 });
}
} else {
return await vlessOverWSHandler(request);
}
} catch (err) {
/** @type {Error} */ let e = err;
return new Response(e.toString());
}
},
};

/**
* 
* @param {import("@cloudflare/workers-types").Request} request
*/
async function vlessOverWSHandler(request) {

/** @type {import("@cloudflare/workers-types").WebSocket[]} */
// @ts-ignore
const webSocketPair = new WebSocketPair();
const [client, webSocket] = Object.values(webSocketPair);

webSocket.accept();

let address = '';
let portWithRandomLog = '';
const log = (/** @type {string} */ info, /** @type {string | undefined} */ event) => {
console.log(`[${address}:${portWithRandomLog}] ${info}`, event || '');
};
const earlyDataHeader = request.headers.get('sec-websocket-protocol') || '';

const readableWebSocketStream = makeReadableWebSocketStream(webSocket, earlyDataHeader, log);

/** @type {{ value: import("@cloudflare/workers-types").Socket | null}}*/
let remoteSocketWapper = {
value: null,
};
let udpStreamWrite = null;
let isDns = false;

// ws --> remote
readableWebSocketStream.pipeTo(new WritableStream({
async write(chunk, controller) {
if (isDns && udpStreamWrite) {
return udpStreamWrite(chunk);
}
if (remoteSocketWapper.value) {
const writer = remoteSocketWapper.value.writable.getWriter()
await writer.write(chunk);
writer.releaseLock();
return;
}

const {
hasError,
message,
portRemote = 443,
addressRemote = '',
rawDataIndex,
vlessVersion = new Uint8Array([0, 0]),
isUDP,
} = processVlessHeader(chunk, userID);
address = addressRemote;
portWithRandomLog = `${portRemote}--${Math.random()} ${isUDP ? 'udp ' : 'tcp '
} `;
if (hasError) {
// controller.error(message);
throw new Error(message); // cf seems has bug, controller.error will not end stream
// webSocket.close(1000, message);
return;
}
// if UDP but port not DNS port, close it
if (isUDP) {
if (portRemote === 53) {
isDns = true;
} else {
// controller.error('UDP proxy only enable for DNS which is port 53');
throw new Error('UDP proxy only enable for DNS which is port 53'); // cf seems has bug, controller.error will not end stream
return;
}
}
// ["version", "附加信息长度 N"]
const vlessResponseHeader = new Uint8Array([vlessVersion[0], 0]);
const rawClientData = chunk.slice(rawDataIndex);

// TODO: support udp here when cf runtime has udp support
if (isDns) {
const { write } = await handleUDPOutBound(webSocket, vlessResponseHeader, log);
udpStreamWrite = write;
udpStreamWrite(rawClientData);
return;
}
handleTCPOutBound(remoteSocketWapper, addressRemote, portRemote, rawClientData, webSocket, vlessResponseHeader, log);
},
close() {
log(`readableWebSocketStream is close`);
},
abort(reason) {
log(`readableWebSocketStream is abort`, JSON.stringify(reason));
},
})).catch((err) => {
log('readableWebSocketStream pipeTo error', err);
});

return new Response(null, {
status: 101,
// @ts-ignore
webSocket: client,
});
}

/**
* Handles outbound TCP connections.
*
* @param {any} remoteSocket 
* @param {string} addressRemote The remote address to connect to.
* @param {number} portRemote The remote port to connect to.
* @param {Uint8Array} rawClientData The raw client data to write.
* @param {import("@cloudflare/workers-types").WebSocket} webSocket The WebSocket to pass the remote socket to.
* @param {Uint8Array} vlessResponseHeader The VLESS response header.
* @param {function} log The logging function.
* @returns {Promise<void>} The remote socket.
*/
async function handleTCPOutBound(remoteSocket, addressRemote, portRemote, rawClientData, webSocket, vlessResponseHeader, log,) {
async function connectAndWrite(address, port) {
/** @type {import("@cloudflare/workers-types").Socket} */
const tcpSocket = connect({
hostname: address,
port: port,
});
remoteSocket.value = tcpSocket;
log(`connected to ${address}:${port}`);
const writer = tcpSocket.writable.getWriter();
await writer.write(rawClientData); // first write, nomal is tls client hello
writer.releaseLock();
return tcpSocket;
}

// if the cf connect tcp socket have no incoming data, we retry to redirect ip
async function retry() {
const tcpSocket = await connectAndWrite(proxyIP || addressRemote, portRemote)
// no matter retry success or not, close websocket
tcpSocket.closed.catch(error => {
console.log('retry tcpSocket closed error', error);
}).finally(() => {
safeCloseWebSocket(webSocket);
})
remoteSocketToWS(tcpSocket, webSocket, vlessResponseHeader, null, log);
}

const tcpSocket = await connectAndWrite(addressRemote, portRemote);

// when remoteSocket is ready, pass to websocket
// remote--> ws
remoteSocketToWS(tcpSocket, webSocket, vlessResponseHeader, retry, log);
}

/**
* 
* @param {import("@cloudflare/workers-types").WebSocket} webSocketServer
* @param {string} earlyDataHeader for ws 0rtt
* @param {(info: string)=> void} log for ws 0rtt
*/
function makeReadableWebSocketStream(webSocketServer, earlyDataHeader, log) {
let readableStreamCancel = false;
const stream = new ReadableStream({
start(controller) {
webSocketServer.addEventListener('message', (event) => {
if (readableStreamCancel) {
return;
}
const message = event.data;
controller.enqueue(message);
});

// The event means that the client closed the client -> server stream.
// However, the server -> client stream is still open until you call close() on the server side.
// The WebSocket protocol says that a separate close message must be sent in each direction to fully close the socket.
webSocketServer.addEventListener('close', () => {
// client send close, need close server
// if stream is cancel, skip controller.close
safeCloseWebSocket(webSocketServer);
if (readableStreamCancel) {
return;
}
controller.close();
}
);
webSocketServer.addEventListener('error', (err) => {
log('webSocketServer has error');
controller.error(err);
}
);
// for ws 0rtt
const { earlyData, error } = base64ToArrayBuffer(earlyDataHeader);
if (error) {
controller.error(error);
} else if (earlyData) {
controller.enqueue(earlyData);
}
},

pull(controller) {
// if ws can stop read if stream is full, we can implement backpressure
// https://streams.spec.whatwg.org/#example-rs-push-backpressure
},
cancel(reason) {
// 1. pipe WritableStream has error, this cancel will called, so ws handle server close into here
// 2. if readableStream is cancel, all controller.close/enqueue need skip,
// 3. but from testing controller.error still work even if readableStream is cancel
if (readableStreamCancel) {
return;
}
log(`ReadableStream was canceled, due to ${reason}`)
readableStreamCancel = true;
safeCloseWebSocket(webSocketServer);
}
});

return stream;

}

// https://xtls.github.io/development/protocols/vless.html
// https://github.com/zizifn/excalidraw-backup/blob/main/v2ray-protocol.excalidraw

/**
* 
* @param { ArrayBuffer} vlessBuffer 
* @param {string} userID 
* @returns 
*/
function processVlessHeader(
vlessBuffer,
userID
) {
if (vlessBuffer.byteLength < 24) {
return {
hasError: true,
message: 'invalid data',
};
}
const version = new Uint8Array(vlessBuffer.slice(0, 1));
let isValidUser = false;
let isUDP = false;
if (stringify(new Uint8Array(vlessBuffer.slice(1, 17))) === userID) {
isValidUser = true;
}
if (!isValidUser) {
return {
hasError: true,
message: 'invalid user',
};
}

const optLength = new Uint8Array(vlessBuffer.slice(17, 18))[0];
//skip opt for now

const command = new Uint8Array(
vlessBuffer.slice(18 + optLength, 18 + optLength + 1)
)[0];

// 0x01 TCP
// 0x02 UDP
// 0x03 MUX
if (command === 1) {
} else if (command === 2) {
isUDP = true;
} else {
return {
hasError: true,
message: `command ${command} is not support, command 01-tcp,02-udp,03-mux`,
};
}
const portIndex = 18 + optLength + 1;
const portBuffer = vlessBuffer.slice(portIndex, portIndex + 2);
// port is big-Endian in raw data etc 80 == 0x005d
const portRemote = new DataView(portBuffer).getUint16(0);

let addressIndex = portIndex + 2;
const addressBuffer = new Uint8Array(
vlessBuffer.slice(addressIndex, addressIndex + 1)
);

// 1--> ipv4 addressLength =4
// 2--> domain name addressLength=addressBuffer[1]
// 3--> ipv6 addressLength =16
const addressType = addressBuffer[0];
let addressLength = 0;
let addressValueIndex = addressIndex + 1;
let addressValue = '';
switch (addressType) {
case 1:
addressLength = 4;
addressValue = new Uint8Array(
vlessBuffer.slice(addressValueIndex, addressValueIndex + addressLength)
).join('.');
break;
case 2:
addressLength = new Uint8Array(
vlessBuffer.slice(addressValueIndex, addressValueIndex + 1)
)[0];
addressValueIndex += 1;
addressValue = new TextDecoder().decode(
vlessBuffer.slice(addressValueIndex, addressValueIndex + addressLength)
);
break;
case 3:
addressLength = 16;
const dataView = new DataView(
vlessBuffer.slice(addressValueIndex, addressValueIndex + addressLength)
);
// 2001:0db8:85a3:0000:0000:8a2e:0370:7334
const ipv6 = [];
for (let i = 0; i < 8; i++) {
ipv6.push(dataView.getUint16(i * 2).toString(16));
}
addressValue = ipv6.join(':');
// seems no need add [] for ipv6
break;
default:
return {
hasError: true,
message: `invild addressType is ${addressType}`,
};
}
if (!addressValue) {
return {
hasError: true,
message: `addressValue is empty, addressType is ${addressType}`,
};
}

return {
hasError: false,
addressRemote: addressValue,
addressType,
portRemote,
rawDataIndex: addressValueIndex + addressLength,
vlessVersion: version,
isUDP,
};
}

/**
* 
* @param {import("@cloudflare/workers-types").Socket} remoteSocket 
* @param {import("@cloudflare/workers-types").WebSocket} webSocket 
* @param {ArrayBuffer} vlessResponseHeader 
* @param {(() => Promise<void>) | null} retry
* @param {*} log 
*/
async function remoteSocketToWS(remoteSocket, webSocket, vlessResponseHeader, retry, log) {
// remote--> ws
let remoteChunkCount = 0;
let chunks = [];
/** @type {ArrayBuffer | null} */
let vlessHeader = vlessResponseHeader;
let hasIncomingData = false; // check if remoteSocket has incoming data
await remoteSocket.readable
.pipeTo(
new WritableStream({
start() {
},
/**
* 
* @param {Uint8Array} chunk 
* @param {*} controller 
*/
async write(chunk, controller) {
hasIncomingData = true;
// remoteChunkCount++;
if (webSocket.readyState !== WS_READY_STATE_OPEN) {
controller.error(
'webSocket.readyState is not open, maybe close'
);
}
if (vlessHeader) {
webSocket.send(await new Blob([vlessHeader, chunk]).arrayBuffer());
vlessHeader = null;
} else {
// seems no need rate limit this, CF seems fix this??..
// if (remoteChunkCount > 20000) {
// // cf one package is 4096 byte(4kb), 4096 * 20000 = 80M
// await delay(1);
// }
webSocket.send(chunk);
}
},
close() {
log(`remoteConnection!.readable is close with hasIncomingData is ${hasIncomingData}`);
// safeCloseWebSocket(webSocket); // no need server close websocket frist for some case will casue HTTP ERR_CONTENT_LENGTH_MISMATCH issue, client will send close event anyway.
},
abort(reason) {
console.error(`remoteConnection!.readable abort`, reason);
},
})
)
.catch((error) => {
console.error(
`remoteSocketToWS has exception `,
error.stack || error
);
safeCloseWebSocket(webSocket);
});

// seems is cf connect socket have error,
// 1. Socket.closed will have error
// 2. Socket.readable will be close without any data coming
if (hasIncomingData === false && retry) {
log(`retry`)
retry();
}
}

/**
* 
* @param {string} base64Str 
* @returns 
*/
function base64ToArrayBuffer(base64Str) {
if (!base64Str) {
return { error: null };
}
try {
// go use modified Base64 for URL rfc4648 which js atob not support
base64Str = base64Str.replace(/-/g, '+').replace(/_/g, '/');
const decode = atob(base64Str);
const arryBuffer = Uint8Array.from(decode, (c) => c.charCodeAt(0));
return { earlyData: arryBuffer.buffer, error: null };
} catch (error) {
return { error };
}
}

/**
* This is not real UUID validation
* @param {string} uuid 
*/
function isValidUUID(uuid) {
const uuidRegex = /^[0-9a-f]{8}-[0-9a-f]{4}-[4][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
return uuidRegex.test(uuid);
}

const WS_READY_STATE_OPEN = 1;
const WS_READY_STATE_CLOSING = 2;
/**
* Normally, WebSocket will not has exceptions when close.
* @param {import("@cloudflare/workers-types").WebSocket} socket
*/
function safeCloseWebSocket(socket) {
try {
if (socket.readyState === WS_READY_STATE_OPEN || socket.readyState === WS_READY_STATE_CLOSING) {
socket.close();
}
} catch (error) {
console.error('safeCloseWebSocket error', error);
}
}

const byteToHex = [];
for (let i = 0; i < 256; ++i) {
byteToHex.push((i + 256).toString(16).slice(1));
}
function unsafeStringify(arr, offset = 0) {
return (byteToHex[arr[offset + 0]] + byteToHex[arr[offset + 1]] + byteToHex[arr[offset + 2]] + byteToHex[arr[offset + 3]] + "-" + byteToHex[arr[offset + 4]] + byteToHex[arr[offset + 5]] + "-" + byteToHex[arr[offset + 6]] + byteToHex[arr[offset + 7]] + "-" + byteToHex[arr[offset + 8]] + byteToHex[arr[offset + 9]] + "-" + byteToHex[arr[offset + 10]] + byteToHex[arr[offset + 11]] + byteToHex[arr[offset + 12]] + byteToHex[arr[offset + 13]] + byteToHex[arr[offset + 14]] + byteToHex[arr[offset + 15]]).toLowerCase();
}
function stringify(arr, offset = 0) {
const uuid = unsafeStringify(arr, offset);
if (!isValidUUID(uuid)) {
throw TypeError("Stringified UUID is invalid");
}
return uuid;
}

/**
* 
* @param {import("@cloudflare/workers-types").WebSocket} webSocket 
* @param {ArrayBuffer} vlessResponseHeader 
* @param {(string)=> void} log 
*/
async function handleUDPOutBound(webSocket, vlessResponseHeader, log) {

let isVlessHeaderSent = false;
const transformStream = new TransformStream({
start(controller) {

},
transform(chunk, controller) {
// udp message 2 byte is the the length of udp data
// TODO: this should have bug, beacsue maybe udp chunk can be in two websocket message
for (let index = 0; index < chunk.byteLength;) {
const lengthBuffer = chunk.slice(index, index + 2);
const udpPakcetLength = new DataView(lengthBuffer).getUint16(0);
const udpData = new Uint8Array(
chunk.slice(index + 2, index + 2 + udpPakcetLength)
);
index = index + 2 + udpPakcetLength;
controller.enqueue(udpData);
}
},
flush(controller) {
}
});

// only handle dns udp for now
transformStream.readable.pipeTo(new WritableStream({
async write(chunk) {
const resp = await fetch('https://1.1.1.1/dns-query',
{
method: 'POST',
headers: {
'content-type': 'application/dns-message',
},
body: chunk,
})
const dnsQueryResult = await resp.arrayBuffer();
const udpSize = dnsQueryResult.byteLength;
// console.log([...new Uint8Array(dnsQueryResult)].map((x) => x.toString(16)));
const udpSizeBuffer = new Uint8Array([(udpSize >> 8) & 0xff, udpSize & 0xff]);
if (webSocket.readyState === WS_READY_STATE_OPEN) {
log(`doh success and dns message length is ${udpSize}`);
if (isVlessHeaderSent) {
webSocket.send(await new Blob([udpSizeBuffer, dnsQueryResult]).arrayBuffer());
} else {
webSocket.send(await new Blob([vlessResponseHeader, udpSizeBuffer, dnsQueryResult]).arrayBuffer());
isVlessHeaderSent = true;
}
}
}
})).catch((error) => {
log('dns udp has error' + error)
});

const writer = transformStream.writable.getWriter();

return {
/**
* 
* @param {Uint8Array} chunk 
*/
write(chunk) {
writer.write(chunk);
}
};
}

/**
* 
* @param {string} userID 
* @param {string | null} hostName
* @returns {string}
*/
function getVLESSConfig(userID, hostName) {
const vlessMain = `vless://${userID}@${hostName}:443?encryption=none&security=tls&sni=${hostName}&fp=randomized&type=ws&host=${hostName}&path=%2F%3Fed%3D2048#${hostName}`
return `
################################################################
v2ray
---------------------------------------------------------------
${vlessMain}
---------------------------------------------------------------
################################################################
clash-meta
---------------------------------------------------------------
- type: vless
name: ${hostName}
server: ${hostName}
port: 443
uuid: ${userID}
network: ws
tls: true
udp: false
sni: ${hostName}
client-fingerprint: chrome
ws-opts:
path: "/?ed=2048"
headers:
host: ${hostName}
---------------------------------------------------------------
################################################################
`;
}

找到刚刚创建的worker 点击quick edit，将刚刚修改完毕的代码粘贴，点击save and deploy即可部署成功。