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628 lines (567 loc) · 31.5 KB
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import { connect } from 'cloudflare:sockets';
let proxyIP = 'proxy.xxxxxxxx.tk:50001'; // proxyIP，也可以是socks5或http
let yourUUID = '93bf61d9-3796-44c2-9b3a-49210ece2585'; // UUID
// CDN
let cfip = [ // 格式:优选域名:端口#备注名称、优选IP:端口#备注名称、[ipv6优选]:端口#备注名称、优选域名#备注
'mfa.gov.ua#SG', 'saas.sin.fan#HK', 'store.ubi.com#JP','cf.130519.xyz#KR','cf.008500.xyz#HK',
'cf.090227.xyz#SG', 'cf.877774.xyz#HK','cdns.doon.eu.org#JP','sub.danfeng.eu.org#TW','cf.zhetengsha.eu.org#HK'
]; // 在此感谢各位大佬维护的优选域名
function getHomePageHTML(currentDomain) {
return `<!DOCTYPE html><html><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>Snippets</title><style>body{font-family:Arial,sans-serif;margin:0;padding:40px 20px;background:linear-gradient(135deg,#667eea 0%,#18800e 100%);min-height:100vh;display:flex;align-items:center;justify-content:center}.container{max-width:600px;background:#fff;padding:40px;border-radius:10px;box-shadow:0 10px 40px rgba(0,0,0,.3);text-align:center}h1{color:#667eea;margin-bottom:20px}.info{font-size:18px;color:#666;margin:20px 0}.link{display:inline-block;background:#667eea;color:#fff;padding:12px 30px;border-radius:5px;text-decoration:none;margin-top:20px}.link:hover{background:#5568d3}.footer{margin-top:30px;padding-top:20px;border-top:1px solid #eee;font-size:14px;color:#999}.footer a{color:#667eea;text-decoration:none;margin:0 10px}.footer a:hover{text-decoration:underline}</style></head><body><div class="container"><h1>Hello Snippets</h1><div class="info">请访问: <strong>https://${currentDomain}/你的UUID</strong><br><br>查看订阅和使用说明</div><div class="footer"><a href="https://github.com/eooce/CF-Workers-and-Snip-VLESS" target="_blank">GitHub</a>|<a href="https://t.me/eooceu" target="_blank">TG群组</a></div></div></body></html>`;
}
function getSubPageHTML(currentDomain) {
const v2raySubLink = `https://${currentDomain}/sub/${yourUUID}`;
const clashSubLink = `https://sublink.eooce.com/clash?config=https://${currentDomain}/sub/${yourUUID}`;
const singboxSubLink = `https://sublink.eooce.com/singbox?config=https://${currentDomain}/sub/${yourUUID}`;
return `<!DOCTYPE html><html><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><title>订阅链接</title><style>*{margin:0;padding:0;box-sizing:border-box}body{font-family:Arial,sans-serif;background:linear-gradient(135deg,#667eea 0%,#18800e 100%);min-height:100vh;padding:20px}.container{max-width:900px;margin:0 auto;background:#fff;border-radius:15px;padding:30px;box-shadow:0 20px 60px rgba(0,0,0,.3)}h1{color:#667eea;margin-bottom:10px;font-size:2rem;text-align:center}.section{margin-bottom:25px}.section-title{color:#667eea;font-size:16px;font-weight:600;margin-bottom:12px;padding-bottom:6px;border-bottom:2px solid #667eea}.link-box{background:#f7f9fc;border:1px solid #e1e8ed;border-radius:8px;padding:12px;margin-bottom:10px}.link-label{font-size:16px;color:#666;margin-bottom:6px;font-weight:700}.link-content{display:flex;gap:8px}.link-text{flex:1;background:#fff;padding:8px 12px;border-radius:5px;border:1px solid #ddd;font-size:.8rem;word-break:break-all;font-family:monospace}.copy-btn{background:#667eea;color:#fff;border:none;padding:8px 16px;border-radius:5px;cursor:pointer;font-size:13px;white-space:nowrap}.copy-btn:hover{background:#5568d3}.copy-btn.copied{background:#48c774}.usage-section{background:#fff9e6;border-left:4px solid #ffc107;padding:15px;border-radius:5px;margin-top:25px}.usage-title{color:#f57c00;font-size:1.2rem;font-weight:600;margin-bottom:12px}.usage-item{margin-bottom:12px;font-size:13px;line-height:1.6}.usage-item strong{color:#333;display:block;margin-bottom:4px}.usage-item code{background:#fff;padding:2px 6px;border-radius:3px;color:#e91e63;font-size:13px;border:1px solid #ddd;word-wrap:break-word;word-break:break-all;display:inline-block;max-width:100%}.example{color:#666;font-size:14px;margin-left:8px}.footer{margin-top:30px;padding-top:20px;border-top:1px solid #e1e8ed;text-align:center;font-size:14px;color:#999}.footer a{color:#667eea;text-decoration:none;margin:0 10px}.footer a:hover{text-decoration:underline}@media (max-width:768px){.container{padding:20px}.link-content{flex-direction:column}.copy-btn{width:100%}}</style></head><body><div class="container"><h1>Snippets 订阅中心</h1><div class="section"><div class="section-title">🔗 通用订阅</div><div class="link-box"><div class="link-label">v2rayN / Loon / Shadowrocket / Karing</div><div class="link-content"><div class="link-text" id="v2ray-link">${v2raySubLink}</div><button class="copy-btn" onclick="copyToClipboard('v2ray-link',this)">复制</button></div></div></div><div class="section"><div class="section-title">😺 Clash 系列订阅</div><div class="link-box"><div class="link-label">Mihomo / FlClash / Clash Meta</div><div class="link-content"><div class="link-text" id="clash-link">${clashSubLink}</div><button class="copy-btn" onclick="copyToClipboard('clash-link',this)">复制</button></div></div></div><div class="section"><div class="section-title">📦 Sing-box 系列订阅</div><div class="link-box"><div class="link-label">Sing-box / SFI / SFA</div><div class="link-content"><div class="link-text" id="singbox-link">${singboxSubLink}</div><button class="copy-btn" onclick="copyToClipboard('singbox-link',this)">复制</button></div></div></div><div class="usage-section"><div class="usage-title">⚙️ 自定义路径(节点里的path)使用说明</div><div class="usage-item"><strong>1. 默认路径</strong><code>/?ed=2560</code><div class="example">使用代码里设置的默认proxyip</div></div><div class="usage-item"><strong>2. 带端口的proxyip</strong><code>/proxyip=210.61.97.241:81</code><br><code>/proxyip=proxy.xxxxxxxx.tk:50001</code><br><code>/?ed=2560&proxyip=210.61.97.241:81</code><br><code>/?ed=2560&proxyip=proxy.xxxxxxxx.tk:50001</code></div><div class="usage-item"><strong>3. 域名proxyip</strong><code>/proxyip=jp.yutian.nyc.mn</code><br><code>/?ed=2560&proxyip=jp.yutian.nyc.mn</code></div><div class="usage-item"><strong>4. 全局SOCKS5</strong><code>/proxyip=socks://user:password@host:port</code><br><code>/proxyip=socks5://user:password@host:port</code><br><code>/?ed=2560&proxyip=socks://user:password@host:port</code><br><code>/?ed=2560&proxyip=socks5://user:password@host:port</code></div><div class="usage-item"><strong>5. 全局HTTP/HTTPS</strong><code>/proxyip=http://user:password@host:port</code><br><code>/proxyip=https://user:password@host:port</code><br><code>/?ed=2560&proxyip=http://user:password@host:port</code><br><code>/?ed=2560&proxyip=https://user:password@host:port</code></div></div><div class="footer"><a href="https://github.com/eooce/CF-Workers-and-Snip-VLESS" target="_blank">GitHub 项目</a>|<a href="https://t.me/eooceu" target="_blank">Telegram 群组</a>|<a href="https://check-proxyip.ssss.nyc.mn" target="_blank">ProxyIP 检测服务</a></div></div><script>function copyToClipboard(e,t){const n=document.getElementById(e).textContent;navigator.clipboard&&navigator.clipboard.writeText?navigator.clipboard.writeText(n).then(()=>{showCopySuccess(t)}).catch(()=>{fallbackCopy(n,t)}):fallbackCopy(n,t)}function fallbackCopy(e,t){const n=document.createElement("textarea");n.value=e,n.style.position="fixed",n.style.left="-999999px",document.body.appendChild(n),n.select();try{document.execCommand("copy"),showCopySuccess(t)}catch(e){alert("复制失败，请手动复制")}document.body.removeChild(n)}function showCopySuccess(e){const t=e.textContent;e.textContent="已复制",e.classList.add("copied"),setTimeout(()=>{e.textContent=t,e.classList.remove("copied")},2e3)}</script></body></html>`;
}
async function handleHomePage(request) {
const url = new URL(request.url);
const currentDomain = url.hostname;
return new Response(getHomePageHTML(currentDomain), {
headers: {
'Content-Type': 'text/html; charset=utf-8',
'Cache-Control': 'no-store, no-cache, must-revalidate, max-age=0',
},
});
}
async function handleSubtionPage(request) {
const url = new URL(request.url);
const currentDomain = url.hostname;
return new Response(getSubPageHTML(currentDomain), {
headers: {
'Content-Type': 'text/html; charset=utf-8',
'Cache-Control': 'no-store, no-cache, must-revalidate, max-age=0',
},
});
}
function formatIdentifier(arr, offset = 0) {
const hex = [...arr.slice(offset, offset + 16)].map(b => b.toString(16).padStart(2, '0')).join('');
return `${hex.substring(0,8)}-${hex.substring(8,12)}-${hex.substring(12,16)}-${hex.substring(16,20)}-${hex.substring(20)}`;
}
function base64ToArray(b64Str) {
if (!b64Str) return { error: null };
try {
const binaryString = atob(b64Str.replace(/-/g, '+').replace(/_/g, '/'));
const bytes = new Uint8Array(binaryString.length);
for (let i = 0; i < binaryString.length; i++) {
bytes[i] = binaryString.charCodeAt(i);
}
return { earlyData: bytes.buffer, error: null };
} catch (error) {
return { error };
}
}
function closeSocketQuietly(socket) {
try {
if (socket.readyState === WebSocket.OPEN || socket.readyState === WebSocket.CLOSING) {
socket.close();
}
} catch (error) {}
}
function isSpeedTestSite(hostname) {
const speedTestDomains = ['speedtest.net','fast.com','speedtest.cn','speed.cloudflare.com','ovo.speedtestcustom.com'];
if (speedTestDomains.includes(hostname)) {
return true;
}
for (const domain of speedTestDomains) {
if (hostname.endsWith('.' + domain) || hostname === domain) {
return true;
}
}
return false;
}
function parseProxyAddress(proxyStr) {
if (!proxyStr) return null;
proxyStr = proxyStr.trim();
if (proxyStr.startsWith('socks://') || proxyStr.startsWith('socks5://')) {
const urlStr = proxyStr.replace(/^socks:\/\//, 'socks5://');
try {
const url = new URL(urlStr);
return {
type: 'socks5',
host: url.hostname,
port: parseInt(url.port) || 1080,
username: url.username ? decodeURIComponent(url.username) : '',
password: url.password ? decodeURIComponent(url.password) : ''
};
} catch (e) {
return null;
}
}
if (proxyStr.startsWith('http://') || proxyStr.startsWith('https://')) {
try {
const url = new URL(proxyStr);
return {
type: 'http',
host: url.hostname,
port: parseInt(url.port) || (proxyStr.startsWith('https://') ? 443 : 80),
username: url.username ? decodeURIComponent(url.username) : '',
password: url.password ? decodeURIComponent(url.password) : ''
};
} catch (e) {
return null;
}
}
if (proxyStr.startsWith('[')) {
const closeBracket = proxyStr.indexOf(']');
if (closeBracket > 0) {
const host = proxyStr.substring(1, closeBracket);
const rest = proxyStr.substring(closeBracket + 1);
if (rest.startsWith(':')) {
const port = parseInt(rest.substring(1), 10);
if (!isNaN(port) && port > 0 && port <= 65535) {
return { type: 'direct', host, port };
}
}
return { type: 'direct', host, port: 443 };
}
}
const lastColonIndex = proxyStr.lastIndexOf(':');
if (lastColonIndex > 0) {
const host = proxyStr.substring(0, lastColonIndex);
const portStr = proxyStr.substring(lastColonIndex + 1);
const port = parseInt(portStr, 10);
if (!isNaN(port) && port > 0 && port <= 65535) {
return { type: 'direct', host, port };
}
}
return { type: 'direct', host: proxyStr, port: 443 };
}
export default {
async fetch(request, env, ctx) {
try {
const url = new URL(request.url);
const pathname = url.pathname;
let pathProxyIP = null;
if (pathname.startsWith('/proxyip=')) {
try {
pathProxyIP = decodeURIComponent(pathname.substring(9)).trim();
} catch (e) {
// 忽略错误
}
if (pathProxyIP && !request.headers.get('Upgrade')) {
proxyIP = pathProxyIP;
return new Response(`set proxyIP to: ${proxyIP}\n\n`, {
headers: {
'Content-Type': 'text/plain; charset=utf-8',
'Cache-Control': 'no-store, no-cache, must-revalidate, max-age=0',
},
});
}
}
if (request.headers.get('Upgrade') === 'websocket') {
let wsPathProxyIP = null;
if (pathname.startsWith('/proxyip=')) {
try {
wsPathProxyIP = decodeURIComponent(pathname.substring(9)).trim();
} catch (e) {
// 忽略错误
}
}
const customProxyIP = wsPathProxyIP || url.searchParams.get('proxyip') || request.headers.get('proxyip');
return await handleVlsRequest(request, customProxyIP);
} else if (request.method === 'GET') {
if (url.pathname === '/') {
return handleHomePage(request);
}
if (url.pathname === `/${yourUUID}`) {
return handleSubtionPage(request);
}
if (url.pathname.toLowerCase().includes(`/sub/${yourUUID}`)) {
const currentDomain = url.hostname;
const header = 'v' + 'l' + 'e' + 's' + 's';
const nodeLinks = cfip.map(cdnItem => {
let host, port = 443, nodeName = '';
if (cdnItem.includes('#')) {
const parts = cdnItem.split('#');
cdnItem = parts[0];
nodeName = parts[1];
}
if (cdnItem.startsWith('[') && cdnItem.includes(']:')) {
const ipv6End = cdnItem.indexOf(']:');
host = cdnItem.substring(0, ipv6End + 1);
const portStr = cdnItem.substring(ipv6End + 2);
port = parseInt(portStr) || 443;
} else if (cdnItem.includes(':')) {
const parts = cdnItem.split(':');
host = parts[0];
port = parseInt(parts[1]) || 443;
} else {
host = cdnItem;
}
if (!nodeName) {
nodeName = `Snippets-${header}`;
}
return `${header}://${yourUUID}@${host}:${port}?encryption=none&security=tls&sni=${currentDomain}&fp=firefox&allowInsecure=0&type=ws&host=${currentDomain}&path=%2F%3Fed%3D2560#${nodeName}`;
});
const linksText = nodeLinks.join('\n');
const base64Content = btoa(unescape(encodeURIComponent(linksText)));
return new Response(base64Content, {
headers: {
'Content-Type': 'text/plain; charset=utf-8',
'Cache-Control': 'no-store, no-cache, must-revalidate, max-age=0',
},
});
}
}
return new Response('Not Found', { status: 404 });
} catch (err) {
return new Response('Internal Server Error', { status: 500 });
}
},
};
async function handleVlsRequest(request, customProxyIP) {
const wsPair = new WebSocketPair();
const [clientSock, serverSock] = Object.values(wsPair);
serverSock.accept();
let remoteConnWrapper = { socket: null };
let isDnsQuery = false;
const earlyData = request.headers.get('sec-websocket-protocol') || '';
const readable = makeReadableStream(serverSock, earlyData);
readable.pipeTo(new WritableStream({
async write(chunk) {
if (isDnsQuery) return await forwardUDP(chunk, serverSock, null);
if (remoteConnWrapper.socket) {
const writer = remoteConnWrapper.socket.writable.getWriter();
await writer.write(chunk);
writer.releaseLock();
return;
}
const { hasError, message, addressType, port, hostname, rawIndex, version, isUDP } = parseWsPacketHeader(chunk, yourUUID);
if (hasError) throw new Error(message);
if (isSpeedTestSite(hostname)) {
throw new Error('Speedtest site is blocked');
}
if (isUDP) {
if (port === 53) isDnsQuery = true;
else throw new Error('UDP is not supported');
}
const respHeader = new Uint8Array([version[0], 0]);
const rawData = chunk.slice(rawIndex);
if (isDnsQuery) return forwardUDP(rawData, serverSock, respHeader);
await forwardTCP(addressType, hostname, port, rawData, serverSock, respHeader, remoteConnWrapper, customProxyIP);
},
})).catch((err) => {
});
return new Response(null, { status: 101, webSocket: clientSock });
}
async function connect2Socks5(proxyConfig, targetHost, targetPort, initialData) {
const { host, port, username, password } = proxyConfig;
let socket;
try {
socket = connect({ hostname: host, port: port });
const writer = socket.writable.getWriter();
const reader = socket.readable.getReader();
try {
const authMethods = username && password ?
new Uint8Array([0x05, 0x02, 0x00, 0x02]) :
new Uint8Array([0x05, 0x01, 0x00]);
await writer.write(authMethods);
const methodResponse = await reader.read();
if (methodResponse.done || methodResponse.value.byteLength < 2) {
throw new Error('S5 method selection failed');
}
const selectedMethod = new Uint8Array(methodResponse.value)[1];
if (selectedMethod === 0x02) {
if (!username || !password) {
throw new Error('S5 requires authentication');
}
const userBytes = new TextEncoder().encode(username);
const passBytes = new TextEncoder().encode(password);
const authPacket = new Uint8Array(3 + userBytes.length + passBytes.length);
authPacket[0] = 0x01;
authPacket[1] = userBytes.length;
authPacket.set(userBytes, 2);
authPacket[2 + userBytes.length] = passBytes.length;
authPacket.set(passBytes, 3 + userBytes.length);
await writer.write(authPacket);
const authResponse = await reader.read();
if (authResponse.done || new Uint8Array(authResponse.value)[1] !== 0x00) {
throw new Error('S5 authentication failed');
}
} else if (selectedMethod !== 0x00) {
throw new Error(`S5 unsupported auth method: ${selectedMethod}`);
}
const hostBytes = new TextEncoder().encode(targetHost);
const connectPacket = new Uint8Array(7 + hostBytes.length);
connectPacket[0] = 0x05;
connectPacket[1] = 0x01;
connectPacket[2] = 0x00;
connectPacket[3] = 0x03;
connectPacket[4] = hostBytes.length;
connectPacket.set(hostBytes, 5);
new DataView(connectPacket.buffer).setUint16(5 + hostBytes.length, targetPort, false);
await writer.write(connectPacket);
const connectResponse = await reader.read();
if (connectResponse.done || new Uint8Array(connectResponse.value)[1] !== 0x00) {
throw new Error('S5 connection failed');
}
await writer.write(initialData);
writer.releaseLock();
reader.releaseLock();
return socket;
} catch (error) {
writer.releaseLock();
reader.releaseLock();
throw error;
}
} catch (error) {
if (socket) {
try {
socket.close();
} catch (e) {
// throw e;
}
}
throw error;
}
}
async function connect2Http(proxyConfig, targetHost, targetPort, initialData) {
const { host, port, username, password } = proxyConfig;
let socket;
try {
socket = connect({ hostname: host, port: port });
const writer = socket.writable.getWriter();
const reader = socket.readable.getReader();
try {
let connectRequest = `CONNECT ${targetHost}:${targetPort} HTTP/1.1\r\n`;
connectRequest += `Host: ${targetHost}:${targetPort}\r\n`;
if (username && password) {
const auth = btoa(`${username}:${password}`);
connectRequest += `Proxy-Authorization: Basic ${auth}\r\n`;
}
connectRequest += `User-Agent: Mozilla/5.0\r\n`;
connectRequest += `Connection: keep-alive\r\n`;
connectRequest += '\r\n';
await writer.write(new TextEncoder().encode(connectRequest));
let responseBuffer = new Uint8Array(0);
let headerEndIndex = -1;
let bytesRead = 0;
const maxHeaderSize = 8192;
const startTime = Date.now();
const timeoutMs = 10000;
while (headerEndIndex === -1 && bytesRead < maxHeaderSize) {
if (Date.now() - startTime > timeoutMs) {
throw new Error('connection timeout');
}
const { done, value } = await reader.read();
if (done) {
throw new Error('Connection closed before receiving HTTP response');
}
const newBuffer = new Uint8Array(responseBuffer.length + value.length);
newBuffer.set(responseBuffer);
newBuffer.set(value, responseBuffer.length);
responseBuffer = newBuffer;
bytesRead = responseBuffer.length;
for (let i = 0; i < responseBuffer.length - 3; i++) {
if (responseBuffer[i] === 0x0d && responseBuffer[i + 1] === 0x0a &&
responseBuffer[i + 2] === 0x0d && responseBuffer[i + 3] === 0x0a) {
headerEndIndex = i + 4;
break;
}
}
}
if (headerEndIndex === -1) {
throw new Error('Invalid HTTP response or response too large');
}
const headerText = new TextDecoder().decode(responseBuffer.slice(0, headerEndIndex));
const statusLine = headerText.split('\r\n')[0];
const statusMatch = statusLine.match(/HTTP\/\d\.\d\s+(\d+)/);
if (!statusMatch) {
throw new Error(`Invalid response: ${statusLine}`);
}
const statusCode = parseInt(statusMatch[1]);
if (statusCode < 200 || statusCode >= 300) {
throw new Error(`Connection failed with status ${statusCode}: ${statusLine}`);
}
await writer.write(initialData);
writer.releaseLock();
reader.releaseLock();
return socket;
} catch (error) {
try {
writer.releaseLock();
} catch (e) {}
try {
reader.releaseLock();
} catch (e) {}
throw error;
}
} catch (error) {
// 确保套接字被正确关闭
if (socket) {
try {
socket.close();
} catch (e) {
// 忽略关闭错误
}
}
throw error;
}
}
async function forwardTCP(addrType, host, portNum, rawData, ws, respHeader, remoteConnWrapper, customProxyIP) {
async function connectDirect(address, port, data) {
const remoteSock = connect({ hostname: address, port: port });
const writer = remoteSock.writable.getWriter();
await writer.write(data);
writer.releaseLock();
return remoteSock;
}
let proxyConfig = null;
let shouldUseProxy = false;
if (customProxyIP) {
proxyConfig = parseProxyAddress(customProxyIP);
if (proxyConfig && (proxyConfig.type === 'socks5' || proxyConfig.type === 'http' || proxyConfig.type === 'https')) {
shouldUseProxy = true;
} else if (!proxyConfig) {
proxyConfig = parseProxyAddress(proxyIP) || { type: 'direct', host: proxyIP, port: 443 };
}
} else {
proxyConfig = parseProxyAddress(proxyIP) || { type: 'direct', host: proxyIP, port: 443 };
if (proxyConfig.type === 'socks5' || proxyConfig.type === 'http' || proxyConfig.type === 'https') {
shouldUseProxy = true;
}
}
async function connectWithProxy() {
let newSocket;
if (proxyConfig.type === 'socks5') {
newSocket = await connect2Socks5(proxyConfig, host, portNum, rawData);
} else if (proxyConfig.type === 'http' || proxyConfig.type === 'https') {
newSocket = await connect2Http(proxyConfig, host, portNum, rawData);
} else {
newSocket = await connectDirect(proxyConfig.host, proxyConfig.port, rawData);
}
remoteConnWrapper.socket = newSocket;
newSocket.closed.catch(() => {}).finally(() => closeSocketQuietly(ws));
connectStreams(newSocket, ws, respHeader, null);
}
if (shouldUseProxy) {
try {
await connectWithProxy();
} catch (err) {
throw err;
}
} else {
try {
const initialSocket = await connectDirect(host, portNum, rawData);
remoteConnWrapper.socket = initialSocket;
connectStreams(initialSocket, ws, respHeader, connectWithProxy);
} catch (err) {
await connectWithProxy();
}
}
}
function parseWsPacketHeader(chunk, token) {
if (chunk.byteLength < 24) return { hasError: true, message: 'Invalid data' };
const version = new Uint8Array(chunk.slice(0, 1));
if (formatIdentifier(new Uint8Array(chunk.slice(1, 17))) !== token) return { hasError: true, message: 'Invalid uuid' };
const optLen = new Uint8Array(chunk.slice(17, 18))[0];
const cmd = new Uint8Array(chunk.slice(18 + optLen, 19 + optLen))[0];
let isUDP = false;
if (cmd === 1) {} else if (cmd === 2) { isUDP = true; } else { return { hasError: true, message: 'Invalid cmd' }; }
const portIdx = 19 + optLen;
const port = new DataView(chunk.slice(portIdx, portIdx + 2)).getUint16(0);
let addrIdx = portIdx + 2, addrLen = 0, addrValIdx = addrIdx + 1, hostname = '';
const addressType = new Uint8Array(chunk.slice(addrIdx, addrValIdx))[0];
switch (addressType) {
case 1:
addrLen = 4;
hostname = new Uint8Array(chunk.slice(addrValIdx, addrValIdx + addrLen)).join('.');
break;
case 2:
addrLen = new Uint8Array(chunk.slice(addrValIdx, addrValIdx + 1))[0];
addrValIdx += 1;
hostname = new TextDecoder().decode(chunk.slice(addrValIdx, addrValIdx + addrLen));
break;
case 3:
addrLen = 16;
const ipv6 = [];
const ipv6View = new DataView(chunk.slice(addrValIdx, addrValIdx + addrLen));
for (let i = 0; i < 8; i++) ipv6.push(ipv6View.getUint16(i * 2).toString(16));
hostname = ipv6.join(':');
break;
default:
return { hasError: true, message: `Invalid address type: ${addressType}` };
}
if (!hostname) return { hasError: true, message: `Invalid address: ${addressType}` };
return { hasError: false, addressType, port, hostname, isUDP, rawIndex: addrValIdx + addrLen, version };
}
function makeReadableStream(socket, earlyDataHeader) {
let cancelled = false;
return new ReadableStream({
start(controller) {
socket.addEventListener('message', (event) => {
if (!cancelled) controller.enqueue(event.data);
});
socket.addEventListener('close', () => {
if (!cancelled) {
closeSocketQuietly(socket);
controller.close();
}
});
socket.addEventListener('error', (err) => controller.error(err));
const { earlyData, error } = base64ToArray(earlyDataHeader);
if (error) controller.error(error);
else if (earlyData) controller.enqueue(earlyData);
},
cancel() {
cancelled = true;
closeSocketQuietly(socket);
}
});
}
async function connectStreams(remoteSocket, webSocket, headerData, retryFunc) {
let header = headerData, hasData = false;
await remoteSocket.readable.pipeTo(
new WritableStream({
async write(chunk, controller) {
hasData = true;
if (webSocket.readyState !== WebSocket.OPEN) controller.error('ws.readyState is not open');
if (header) {
const response = new Uint8Array(header.length + chunk.byteLength);
response.set(header, 0);
response.set(chunk, header.length);
webSocket.send(response.buffer);
header = null;
} else {
webSocket.send(chunk);
}
},
abort() {},
})
).catch((err) => {
console.error('Stream pipe error:', err);
closeSocketQuietly(webSocket);
});
if (!hasData && retryFunc) {
console.log('No data received, retrying...');
await retryFunc();
}
}
async function forwardUDP(udpChunk, webSocket, respHeader) {
try {
const tcpSocket = connect({ hostname: '8.8.4.4', port: 53 });
let vlessHeader = respHeader;
const writer = tcpSocket.writable.getWriter();
await writer.write(udpChunk);
writer.releaseLock();
await tcpSocket.readable.pipeTo(new WritableStream({
async write(chunk) {
if (webSocket.readyState === WebSocket.OPEN) {
if (vlessHeader) {
const response = new Uint8Array(vlessHeader.length + chunk.byteLength);
response.set(vlessHeader, 0);
response.set(chunk, vlessHeader.length);
webSocket.send(response.buffer);
vlessHeader = null;
} else {
webSocket.send(chunk);
}
}
},
}));
} catch (error) {
// console.error('UDP forward error:', error);
}
}