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worker.js
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// https://github.com/bia-pain-bache/BPB-Worker-Panel
import { connect } from 'cloudflare:sockets';
import nacl from 'tweetnacl';
import sha256 from 'js-sha256';
import { SignJWT, jwtVerify } from 'jose';
// How to generate your own UUID:
// https://www.uuidgenerator.net/
let userID = '89b3cbba-e6ac-485a-9481-976a0415eab9';
let trojanPassword = `bpb-trojan`;
// https://www.nslookup.io/domains/bpb.yousef.isegaro.com/dns-records/
const proxyIPs= ['bpb.yousef.isegaro.com'];
const defaultHttpPorts = ['80', '8080', '2052', '2082', '2086', '2095', '8880'];
const defaultHttpsPorts = ['443', '8443', '2053', '2083', '2087', '2096'];
let proxyIP = proxyIPs[Math.floor(Math.random() * proxyIPs.length)];
let dohURL = 'https://cloudflare-dns.com/dns-query';
let hashPassword;
let panelVersion = '2.7';
export default {
/**
* @param {import("@cloudflare/workers-types").Request} request
* @param {{UUID: string, PROXYIP: string, DNS_RESOLVER_URL: string}} env
* @param {import("@cloudflare/workers-types").ExecutionContext} ctx
* @returns {Promise<Response>}
*/
async fetch(request, env) {
try {
userID = env.UUID || userID;
proxyIP = env.PROXYIP || proxyIP;
dohURL = env.DNS_RESOLVER_URL || dohURL;
trojanPassword = env.TROJAN_PASS || trojanPassword;
hashPassword = sha256.sha224(trojanPassword);
if (!isValidUUID(userID)) throw new Error(`Invalid UUID: ${userID}`);
const upgradeHeader = request.headers.get('Upgrade');
const url = new URL(request.url);
if (!upgradeHeader || upgradeHeader !== 'websocket') {
const searchParams = new URLSearchParams(url.search);
const host = request.headers.get('Host');
const client = searchParams.get('app');
const { kvNotFound, proxySettings: settings, warpConfigs } = await getDataset(env);
if (kvNotFound) {
const errorPage = renderErrorPage('KV Dataset is not properly set!', null, true);
return new Response(errorPage, { status: 200, headers: {'Content-Type': 'text/html'}});
}
switch (url.pathname) {
case '/cf':
return new Response(JSON.stringify(request.cf, null, 4), {
status: 200,
headers: {
'Content-Type': 'application/json;charset=utf-8',
},
});
case '/update-warp':
const Auth = await Authenticate(request, env);
if (!Auth) return new Response('Unauthorized', { status: 401 });
if (request.method === 'POST') {
try {
const { error: warpPlusError } = await fetchWgConfig(env, settings);
if (warpPlusError) {
return new Response(warpPlusError, { status: 400 });
} else {
return new Response('Warp configs updated successfully', { status: 200 });
}
} catch (error) {
console.log(error);
return new Response(`An error occurred while updating Warp configs! - ${error}`, { status: 500 });
}
} else {
return new Response('Unsupported request', { status: 405 });
}
case `/sub/${userID}`:
if (client === 'sfa') {
const BestPingSFA = await getSingBoxCustomConfig(env, settings, host, client, false);
return new Response(JSON.stringify(BestPingSFA, null, 4), {
status: 200,
headers: {
'Content-Type': 'application/json;charset=utf-8',
'Cache-Control': 'no-store, no-cache, must-revalidate, proxy-revalidate',
'CDN-Cache-Control': 'no-store'
}
});
}
if (client === 'clash') {
const BestPingClash = await getClashNormalConfig(env, settings, host);
return new Response(JSON.stringify(BestPingClash, null, 4), {
status: 200,
headers: {
'Content-Type': 'application/json;charset=utf-8',
'Cache-Control': 'no-store, no-cache, must-revalidate, proxy-revalidate',
'CDN-Cache-Control': 'no-store'
}
});
}
if (client === 'xray') {
const xrayFullConfigs = await getXrayCustomConfigs(env, settings, host, false);
return new Response(JSON.stringify(xrayFullConfigs, null, 4), {
status: 200,
headers: {
'Content-Type': 'application/json;charset=utf-8',
'Cache-Control': 'no-store, no-cache, must-revalidate, proxy-revalidate',
'CDN-Cache-Control': 'no-store'
}
});
}
const normalConfigs = await getNormalConfigs(settings, host, client);
return new Response(normalConfigs, {
status: 200,
headers: {
'Content-Type': 'text/plain;charset=utf-8',
'Cache-Control': 'no-store, no-cache, must-revalidate, proxy-revalidate',
'CDN-Cache-Control': 'no-store'
}
});
case `/fragsub/${userID}`:
let fragConfigs = client === 'hiddify'
? await getSingBoxCustomConfig(env, settings, host, client, true)
: await getXrayCustomConfigs(env, settings, host, true);
return new Response(JSON.stringify(fragConfigs, null, 4), {
status: 200,
headers: {
'Content-Type': 'application/json;charset=utf-8',
'Cache-Control': 'no-store, no-cache, must-revalidate, proxy-revalidate',
'CDN-Cache-Control': 'no-store'
}
});
case `/warpsub/${userID}`:
if (client === 'clash') {
const clashWarpConfig = await getClashWarpConfig(settings, warpConfigs);
return new Response(JSON.stringify(clashWarpConfig, null, 4), {
status: 200,
headers: {
'Content-Type': 'application/json;charset=utf-8',
'Cache-Control': 'no-store, no-cache, must-revalidate, proxy-revalidate',
'CDN-Cache-Control': 'no-store'
}
});
}
if (client === 'singbox' || client === 'hiddify') {
const singboxWarpConfig = await getSingBoxWarpConfig(settings, warpConfigs, client);
return new Response(JSON.stringify(singboxWarpConfig, null, 4), {
status: 200,
headers: {
'Content-Type': 'application/json;charset=utf-8',
'Cache-Control': 'no-store, no-cache, must-revalidate, proxy-revalidate',
'CDN-Cache-Control': 'no-store'
}
});
}
const warpConfig = await getXrayWarpConfigs(settings, warpConfigs, client);
return new Response(JSON.stringify(warpConfig, null, 4), {
status: 200,
headers: {
'Content-Type': 'application/json;charset=utf-8',
'Cache-Control': 'no-store, no-cache, must-revalidate, proxy-revalidate',
'CDN-Cache-Control': 'no-store'
}
});
case '/panel':
const pwd = await env.bpb.get('pwd');
const isAuth = await Authenticate(request, env);
if (request.method === 'POST') {
if (!isAuth) return new Response('Unauthorized or expired session!', { status: 401 });
const formData = await request.formData();
const isReset = formData.get('resetSettings') === 'true';
isReset
? await updateDataset(env, null, true)
: await updateDataset(env, formData);
return new Response('Success', { status: 200 });
}
if (pwd && !isAuth) return Response.redirect(`${url.origin}/login`, 302);
const isPassSet = pwd?.length >= 8;
const homePage = renderHomePage(settings, host, isPassSet);
return new Response(homePage, {
status: 200,
headers: {
'Content-Type': 'text/html',
'Access-Control-Allow-Origin': url.origin,
'Access-Control-Allow-Methods': 'GET, POST',
'Access-Control-Allow-Headers': 'Content-Type, Authorization',
'X-Content-Type-Options': 'nosniff',
'X-Frame-Options': 'DENY',
'Referrer-Policy': 'strict-origin-when-cross-origin'
}
});
case '/login':
if (typeof env.bpb !== 'object') {
const errorPage = renderErrorPage('KV Dataset is not properly set!', null, true);
return new Response(errorPage, { status: 200, headers: {'Content-Type': 'text/html'}});
}
const loginAuth = await Authenticate(request, env);
if (loginAuth) return Response.redirect(`${url.origin}/panel`, 302);
let secretKey = await env.bpb.get('secretKey');
if (!secretKey) {
secretKey = generateSecretKey();
await env.bpb.put('secretKey', secretKey);
}
if (request.method === 'POST') {
const password = await request.text();
const savedPass = await env.bpb.get('pwd');
if (password === savedPass) {
const jwtToken = await generateJWTToken(secretKey);
const cookieHeader = `jwtToken=${jwtToken}; HttpOnly; Secure; Max-Age=${7 * 24 * 60 * 60}; Path=/; SameSite=Strict`;
return new Response('Success', {
status: 200,
headers: {
'Set-Cookie': cookieHeader,
'Content-Type': 'text/plain',
}
});
} else {
return new Response('Method Not Allowed', { status: 405 });
}
}
const loginPage = renderLoginPage();
return new Response(loginPage, {
status: 200,
headers: {
'Content-Type': 'text/html',
'Access-Control-Allow-Origin': url.origin,
'Access-Control-Allow-Methods': 'GET, POST',
'Access-Control-Allow-Headers': 'Content-Type, Authorization',
'X-Content-Type-Options': 'nosniff',
'X-Frame-Options': 'DENY',
'Referrer-Policy': 'strict-origin-when-cross-origin'
}
});
case '/logout':
return new Response('Success', {
status: 200,
headers: {
'Set-Cookie': 'jwtToken=; Secure; SameSite=None; Expires=Thu, 01 Jan 1970 00:00:00 GMT',
'Content-Type': 'text/plain'
}
});
case '/panel/password':
const oldPwd = await env.bpb.get('pwd');
let passAuth = await Authenticate(request, env);
if (oldPwd && !passAuth) return new Response('Unauthorized!', { status: 401 });
const newPwd = await request.text();
if (newPwd === oldPwd) return new Response('Please enter a new Password!', { status: 400 });
await env.bpb.put('pwd', newPwd);
return new Response('Success', {
status: 200,
headers: {
'Set-Cookie': 'jwtToken=; Path=/; Secure; SameSite=None; Expires=Thu, 01 Jan 1970 00:00:00 GMT',
'Content-Type': 'text/plain',
}
});
default:
// return new Response('Not found', { status: 404 });
url.hostname = 'www.speedtest.net';
url.protocol = 'https:';
request = new Request(url, request);
return await fetch(request);
}
} else {
return url.pathname.startsWith('/tr')
? await trojanOverWSHandler(request)
: await vlessOverWSHandler(request);
}
} catch (err) {
const errorPage = renderErrorPage('Something went wrong!', err, false);
return new Response(errorPage, { status: 200, headers: {'Content-Type': 'text/html'}});
}
}
};
/**
* Handles VLESS over WebSocket requests by creating a WebSocket pair, accepting the WebSocket connection, and processing the VLESS header.
* @param {import("@cloudflare/workers-types").Request} request The incoming request object.
* @returns {Promise<Response>} A Promise that resolves to a WebSocket response object.
*/
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}] ${info}`, event || "");
};
const earlyDataHeader = request.headers.get("sec-websocket-protocol") || "";
const readableWebSocketStream = makeReadableWebSocketStream(webSocket, earlyDataHeader, log);
/** @type {{ value: import("@cloudflare/workers-types").Socket | null}}*/
let remoteSocketWapper = {
value: null,
};
let udpStreamWrite = null;
let isDns = false;
// ws --> remote
readableWebSocketStream
.pipeTo(
new WritableStream({
async write(chunk, controller) {
if (isDns && udpStreamWrite) {
return udpStreamWrite(chunk);
}
if (remoteSocketWapper.value) {
const writer = remoteSocketWapper.value.writable.getWriter();
await writer.write(chunk);
writer.releaseLock();
return;
}
const {
hasError,
message,
portRemote = 443,
addressRemote = "",
rawDataIndex,
vlessVersion = new Uint8Array([0, 0]),
isUDP,
} = await processVlessHeader(chunk, userID);
address = addressRemote;
portWithRandomLog = `${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(
request,
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,
});
}
/**
* Checks if a given UUID is present in the API response.
* @param {string} targetUuid The UUID to search for.
* @returns {Promise<boolean>} A Promise that resolves to true if the UUID is present in the API response, false otherwise.
*/
async function checkUuidInApiResponse(targetUuid) {
// Check if any of the environment variables are empty
try {
const apiResponse = await getApiResponse();
if (!apiResponse) {
return false;
}
const isUuidInResponse = apiResponse.users.some((user) => user.uuid === targetUuid);
return isUuidInResponse;
} catch (error) {
console.error("Error:", error);
return false;
}
}
async function trojanOverWSHandler(request) {
const webSocketPair = new WebSocketPair();
const [client, webSocket] = Object.values(webSocketPair);
webSocket.accept();
let address = "";
let portWithRandomLog = "";
const log = (info, event) => {
console.log(`[${address}:${portWithRandomLog}] ${info}`, event || "");
};
const earlyDataHeader = request.headers.get("sec-websocket-protocol") || "";
const readableWebSocketStream = makeReadableWebSocketStream(webSocket, earlyDataHeader, log);
let remoteSocketWapper = {
value: null,
};
let udpStreamWrite = null;
readableWebSocketStream
.pipeTo(
new WritableStream({
async write(chunk, controller) {
if (udpStreamWrite) {
return udpStreamWrite(chunk);
}
if (remoteSocketWapper.value) {
const writer = remoteSocketWapper.value.writable.getWriter();
await writer.write(chunk);
writer.releaseLock();
return;
}
const {
hasError,
message,
portRemote = 443,
addressRemote = "",
rawClientData,
} = await parseTrojanHeader(chunk);
address = addressRemote;
portWithRandomLog = `${portRemote}--${Math.random()} tcp`;
if (hasError) {
throw new Error(message);
return;
}
handleTCPOutBound(request, remoteSocketWapper, addressRemote, portRemote, rawClientData, webSocket, false, log);
},
close() {
log(`readableWebSocketStream is closed`);
},
abort(reason) {
log(`readableWebSocketStream is aborted`, JSON.stringify(reason));
},
})
)
.catch((err) => {
log("readableWebSocketStream pipeTo error", err);
});
return new Response(null, {
status: 101,
// @ts-ignore
webSocket: client,
});
}
async function parseTrojanHeader(buffer) {
if (buffer.byteLength < 56) {
return {
hasError: true,
message: "invalid data",
};
}
let crLfIndex = 56;
if (new Uint8Array(buffer.slice(56, 57))[0] !== 0x0d || new Uint8Array(buffer.slice(57, 58))[0] !== 0x0a) {
return {
hasError: true,
message: "invalid header format (missing CR LF)",
};
}
const password = new TextDecoder().decode(buffer.slice(0, crLfIndex));
if (password !== hashPassword) {
return {
hasError: true,
message: "invalid password",
};
}
const socks5DataBuffer = buffer.slice(crLfIndex + 2);
if (socks5DataBuffer.byteLength < 6) {
return {
hasError: true,
message: "invalid SOCKS5 request data",
};
}
const view = new DataView(socks5DataBuffer);
const cmd = view.getUint8(0);
if (cmd !== 1) {
return {
hasError: true,
message: "unsupported command, only TCP (CONNECT) is allowed",
};
}
const atype = view.getUint8(1);
// 0x01: IPv4 address
// 0x03: Domain name
// 0x04: IPv6 address
let addressLength = 0;
let addressIndex = 2;
let address = "";
switch (atype) {
case 1:
addressLength = 4;
address = new Uint8Array(socks5DataBuffer.slice(addressIndex, addressIndex + addressLength)).join(".");
break;
case 3:
addressLength = new Uint8Array(socks5DataBuffer.slice(addressIndex, addressIndex + 1))[0];
addressIndex += 1;
address = new TextDecoder().decode(socks5DataBuffer.slice(addressIndex, addressIndex + addressLength));
break;
case 4:
addressLength = 16;
const dataView = new DataView(socks5DataBuffer.slice(addressIndex, addressIndex + addressLength));
const ipv6 = [];
for (let i = 0; i < 8; i++) {
ipv6.push(dataView.getUint16(i * 2).toString(16));
}
address = ipv6.join(":");
break;
default:
return {
hasError: true,
message: `invalid addressType is ${atype}`,
};
}
if (!address) {
return {
hasError: true,
message: `address is empty, addressType is ${atype}`,
};
}
const portIndex = addressIndex + addressLength;
const portBuffer = socks5DataBuffer.slice(portIndex, portIndex + 2);
const portRemote = new DataView(portBuffer).getUint16(0);
return {
hasError: false,
addressRemote: address,
portRemote,
rawClientData: socks5DataBuffer.slice(portIndex + 4),
};
}
/**
* Handles outbound TCP connections.
*
* @param {any} remoteSocket
* @param {string} addressRemote The remote address to connect to.
* @param {number} portRemote The remote port to connect to.
* @param {Uint8Array} rawClientData The raw client data to write.
* @param {import("@cloudflare/workers-types").WebSocket} webSocket The WebSocket to pass the remote socket to.
* @param {Uint8Array} vlessResponseHeader The VLESS response header.
* @param {function} log The logging function.
* @returns {Promise<void>} The remote socket.
*/
async function handleTCPOutBound(
request,
remoteSocket,
addressRemote,
portRemote,
rawClientData,
webSocket,
vlessResponseHeader,
log
) {
async function connectAndWrite(address, port) {
if (/^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?).){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/.test(address)) address = `${atob('d3d3Lg==')}${address}${atob('LnNzbGlwLmlv')}`;
/** @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 { pathname } = new URL(request.url);
let panelProxyIP = pathname.split('/')[2];
panelProxyIP = panelProxyIP ? atob(panelProxyIP) : undefined;
const tcpSocket = await connectAndWrite(panelProxyIP || 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);
});
vlessResponseHeader
? vlessRemoteSocketToWS(tcpSocket, webSocket, vlessResponseHeader, null, log)
: trojanRemoteSocketToWS(tcpSocket, webSocket, null, log);
}
const tcpSocket = await connectAndWrite(addressRemote, portRemote);
// when remoteSocket is ready, pass to websocket
// remote--> ws
vlessResponseHeader
? vlessRemoteSocketToWS(tcpSocket, webSocket, vlessResponseHeader, retry, log)
: trojanRemoteSocketToWS(tcpSocket, webSocket, retry, log);
}
/**
* Creates a readable stream from a WebSocket server, allowing for data to be read from the WebSocket.
* @param {import("@cloudflare/workers-types").WebSocket} webSocketServer The WebSocket server to create the readable stream from.
* @param {string} earlyDataHeader The header containing early data for WebSocket 0-RTT.
* @param {(info: string)=> void} log The logging function.
* @returns {ReadableStream} A readable stream that can be used to read data from the WebSocket.
*/
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
/**
* Processes the VLESS header buffer and returns an object with the relevant information.
* @param {ArrayBuffer} vlessBuffer The VLESS header buffer to process.
* @param {string} userID The user ID to validate against the UUID in the VLESS header.
* @returns {{
* hasError: boolean,
* message?: string,
* addressRemote?: string,
* addressType?: number,
* portRemote?: number,
* rawDataIndex?: number,
* vlessVersion?: Uint8Array,
* isUDP?: boolean
* }} An object with the relevant information extracted from the VLESS header buffer.
*/
async 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;
const slicedBuffer = new Uint8Array(vlessBuffer.slice(1, 17));
const slicedBufferString = stringify(slicedBuffer);
const uuids = userID.includes(",") ? userID.split(",") : [userID];
const checkUuidInApi = await checkUuidInApiResponse(slicedBufferString);
isValidUser = uuids.some((userUuid) => checkUuidInApi || slicedBufferString === userUuid.trim());
console.log(`checkUuidInApi: ${await checkUuidInApiResponse(slicedBufferString)}, userID: ${slicedBufferString}`);
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,
};
}
/**
* Converts a remote socket to a WebSocket connection.
* @param {import("@cloudflare/workers-types").Socket} remoteSocket The remote socket to convert.
* @param {import("@cloudflare/workers-types").WebSocket} webSocket The WebSocket to connect to.
* @param {ArrayBuffer | null} vlessResponseHeader The VLESS response header.
* @param {(() => Promise<void>) | null} retry The function to retry the connection if it fails.
* @param {(info: string) => void} log The logging function.
* @returns {Promise<void>} A Promise that resolves when the conversion is complete.
*/
async function vlessRemoteSocketToWS(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(`vlessRemoteSocketToWS 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();
}
}
async function trojanRemoteSocketToWS(remoteSocket, webSocket, retry, log) {
let hasIncomingData = false;
await remoteSocket.readable
.pipeTo(
new WritableStream({
start() {},
/**
*
* @param {Uint8Array} chunk
* @param {*} controller
*/
async write(chunk, controller) {
hasIncomingData = true;
if (webSocket.readyState !== WS_READY_STATE_OPEN) {
controller.error("webSocket connection is not open");
}
webSocket.send(chunk);
},
close() {
log(`remoteSocket.readable is closed, hasIncomingData: ${hasIncomingData}`);
},
abort(reason) {
console.error("remoteSocket.readable abort", reason);
},
})
)
.catch((error) => {
console.error(`trojanRemoteSocketToWS error:`, error.stack || error);
safeCloseWebSocket(webSocket);
});
if (hasIncomingData === false && retry) {
log(`retry`);
retry();
}
}
/**
* Decodes a base64 string into an ArrayBuffer.
* @param {string} base64Str The base64 string to decode.
* @returns {{earlyData: ArrayBuffer|null, error: Error|null}} An object containing the decoded ArrayBuffer or null if there was an error, and any error that occurred during decoding or null if there was no error.
*/
function base64ToArrayBuffer(base64Str) {
if (!base64Str) {
return { earlyData: null, error: null };
}
try {
// go use modified Base64 for URL rfc4648 which js atob not support
base64Str = base64Str.replace(/-/g, '+').replace(/_/g, '/');
const decode = atob(base64Str);
const arryBuffer = Uint8Array.from(decode, (c) => c.charCodeAt(0));
return { earlyData: arryBuffer.buffer, error: null };
} catch (error) {
return { earlyData: null, error };
}
}
/**
* Checks if a given string is a valid UUID.
* Note: This is not a real UUID validation.
* @param {string} uuid The string to validate as a UUID.
* @returns {boolean} True if the string is a valid UUID, false otherwise.
*/
function isValidUUID(uuid) {
const uuidRegex = /^[0-9a-f]{8}-[0-9a-f]{4}-[4][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
return uuidRegex.test(uuid);
}
const WS_READY_STATE_OPEN = 1;
const WS_READY_STATE_CLOSING = 2;
/**
* Closes a WebSocket connection safely without throwing exceptions.
* @param {import("@cloudflare/workers-types").WebSocket} socket The WebSocket connection to close.
*/
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]] +