@push.rocks/smartproxy
Version:
A powerful proxy package that effectively handles high traffic, with features such as SSL/TLS support, port proxying, WebSocket handling, dynamic routing with authentication options, and automatic ACME certificate management.
305 lines • 28 kB
JavaScript
import * as plugins from './plugins.js';
import { ProxyRouter } from './smartproxy.classes.router.js';
import * as fs from 'fs';
import * as path from 'path';
import { fileURLToPath } from 'url';
export class NetworkProxy {
constructor(optionsArg) {
this.proxyConfigs = [];
this.router = new ProxyRouter();
this.socketMap = new plugins.lik.ObjectMap();
this.defaultHeaders = {};
this.alreadyAddedReverseConfigs = {};
this.options = optionsArg;
const __dirname = path.dirname(fileURLToPath(import.meta.url));
const certPath = path.join(__dirname, '..', 'assets', 'certs');
try {
this.defaultCertificates = {
key: fs.readFileSync(path.join(certPath, 'key.pem'), 'utf8'),
cert: fs.readFileSync(path.join(certPath, 'cert.pem'), 'utf8')
};
}
catch (error) {
console.error('Error loading certificates:', error);
throw error;
}
}
async start() {
// Instead of marking the callback async (which Node won't await),
// we call our async handler and catch errors.
this.httpsServer = plugins.https.createServer({
key: this.defaultCertificates.key,
cert: this.defaultCertificates.cert
}, (originRequest, originResponse) => {
this.handleRequest(originRequest, originResponse).catch((error) => {
console.error('Unhandled error in request handler:', error);
try {
originResponse.end();
}
catch (err) {
// ignore errors during cleanup
}
});
});
// Enable websockets
const wsServer = new plugins.ws.WebSocketServer({ server: this.httpsServer });
// Set up the heartbeat interval
this.heartbeatInterval = setInterval(() => {
wsServer.clients.forEach((ws) => {
const wsIncoming = ws;
if (!wsIncoming.lastPong) {
wsIncoming.lastPong = Date.now();
}
if (Date.now() - wsIncoming.lastPong > 5 * 60 * 1000) {
console.log('Terminating websocket due to missing pong for 5 minutes.');
wsIncoming.terminate();
}
else {
wsIncoming.ping();
}
});
}, 60000); // runs every 1 minute
wsServer.on('connection', (wsIncoming, reqArg) => {
console.log(`wss proxy: got connection for wsc for https://${reqArg.headers.host}${reqArg.url}`);
wsIncoming.lastPong = Date.now();
wsIncoming.on('pong', () => {
wsIncoming.lastPong = Date.now();
});
let wsOutgoing;
const outGoingDeferred = plugins.smartpromise.defer();
// --- Improvement 2: Only call routeReq once ---
const wsDestinationConfig = this.router.routeReq(reqArg);
if (!wsDestinationConfig) {
wsIncoming.terminate();
return;
}
try {
wsOutgoing = new plugins.wsDefault(`ws://${wsDestinationConfig.destinationIp}:${wsDestinationConfig.destinationPort}${reqArg.url}`);
console.log('wss proxy: initiated outgoing proxy');
wsOutgoing.on('open', async () => {
outGoingDeferred.resolve();
});
}
catch (err) {
console.error('Error initiating outgoing WebSocket:', err);
wsIncoming.terminate();
return;
}
wsIncoming.on('message', async (message, isBinary) => {
try {
await outGoingDeferred.promise;
wsOutgoing.send(message, { binary: isBinary });
}
catch (error) {
console.error('Error sending message to wsOutgoing:', error);
}
});
wsOutgoing.on('message', async (message, isBinary) => {
try {
wsIncoming.send(message, { binary: isBinary });
}
catch (error) {
console.error('Error sending message to wsIncoming:', error);
}
});
const terminateWsOutgoing = () => {
if (wsOutgoing) {
wsOutgoing.terminate();
console.log('Terminated outgoing ws.');
}
};
wsIncoming.on('error', terminateWsOutgoing);
wsIncoming.on('close', terminateWsOutgoing);
const terminateWsIncoming = () => {
if (wsIncoming) {
wsIncoming.terminate();
console.log('Terminated incoming ws.');
}
};
wsOutgoing.on('error', terminateWsIncoming);
wsOutgoing.on('close', terminateWsIncoming);
});
this.httpsServer.keepAliveTimeout = 600 * 1000;
this.httpsServer.headersTimeout = 600 * 1000;
this.httpsServer.on('connection', (connection) => {
this.socketMap.add(connection);
console.log(`Added connection. Now ${this.socketMap.getArray().length} sockets connected.`);
const cleanupConnection = () => {
if (this.socketMap.checkForObject(connection)) {
this.socketMap.remove(connection);
console.log(`Removed connection. ${this.socketMap.getArray().length} sockets remaining.`);
connection.destroy();
}
};
connection.on('close', cleanupConnection);
connection.on('error', cleanupConnection);
connection.on('end', cleanupConnection);
connection.on('timeout', cleanupConnection);
});
this.httpsServer.listen(this.options.port);
console.log(`NetworkProxy -> OK: now listening for new connections on port ${this.options.port}`);
}
/**
* Internal async handler for processing HTTP/HTTPS requests.
*/
async handleRequest(originRequest, originResponse) {
const endOriginReqRes = (statusArg = 404, messageArg = 'This route is not available on this server.', headers = {}) => {
originResponse.writeHead(statusArg, messageArg);
originResponse.end(messageArg);
if (originRequest.socket !== originResponse.socket) {
console.log('hey, something is strange.');
}
originResponse.destroy();
};
console.log(`got request: ${originRequest.headers.host}${plugins.url.parse(originRequest.url).path}`);
const destinationConfig = this.router.routeReq(originRequest);
if (!destinationConfig) {
console.log(`${originRequest.headers.host} can't be routed properly. Terminating request.`);
endOriginReqRes();
return;
}
// authentication
if (destinationConfig.authentication) {
const authInfo = destinationConfig.authentication;
switch (authInfo.type) {
case 'Basic': {
const authHeader = originRequest.headers.authorization;
if (!authHeader) {
return endOriginReqRes(401, 'Authentication required', {
'WWW-Authenticate': 'Basic realm="Access to the staging site", charset="UTF-8"',
});
}
if (!authHeader.includes('Basic ')) {
return endOriginReqRes(401, 'Authentication required', {
'WWW-Authenticate': 'Basic realm="Access to the staging site", charset="UTF-8"',
});
}
const authStringBase64 = authHeader.replace('Basic ', '');
const authString = plugins.smartstring.base64.decode(authStringBase64);
const userPassArray = authString.split(':');
const user = userPassArray[0];
const pass = userPassArray[1];
if (user === authInfo.user && pass === authInfo.pass) {
console.log('Request successfully authenticated');
}
else {
return endOriginReqRes(403, 'Forbidden: Wrong credentials');
}
break;
}
default:
return endOriginReqRes(403, 'Forbidden: unsupported authentication method configured. Please report to the admin.');
}
}
let destinationUrl;
if (destinationConfig) {
destinationUrl = `http://${destinationConfig.destinationIp}:${destinationConfig.destinationPort}${originRequest.url}`;
}
else {
return endOriginReqRes();
}
console.log(destinationUrl);
try {
const proxyResponse = await plugins.smartrequest.request(destinationUrl, {
method: originRequest.method,
headers: {
...originRequest.headers,
'X-Forwarded-Host': originRequest.headers.host,
'X-Forwarded-Proto': 'https',
},
keepAlive: true,
}, true, // streaming (keepAlive)
(proxyRequest) => {
originRequest.on('data', (data) => {
proxyRequest.write(data);
});
originRequest.on('end', () => {
proxyRequest.end();
});
originRequest.on('error', () => {
proxyRequest.end();
});
originRequest.on('close', () => {
proxyRequest.end();
});
originRequest.on('timeout', () => {
proxyRequest.end();
originRequest.destroy();
});
proxyRequest.on('error', () => {
endOriginReqRes();
});
});
originResponse.statusCode = proxyResponse.statusCode;
console.log(proxyResponse.statusCode);
for (const defaultHeader of Object.keys(this.defaultHeaders)) {
originResponse.setHeader(defaultHeader, this.defaultHeaders[defaultHeader]);
}
for (const header of Object.keys(proxyResponse.headers)) {
originResponse.setHeader(header, proxyResponse.headers[header]);
}
proxyResponse.on('data', (data) => {
originResponse.write(data);
});
proxyResponse.on('end', () => {
originResponse.end();
});
proxyResponse.on('error', () => {
originResponse.destroy();
});
proxyResponse.on('close', () => {
originResponse.end();
});
proxyResponse.on('timeout', () => {
originResponse.end();
originResponse.destroy();
});
}
catch (error) {
console.error('Error while processing request:', error);
endOriginReqRes(502, 'Bad Gateway: Error processing the request');
}
}
async updateProxyConfigs(proxyConfigsArg) {
console.log(`got new proxy configs`);
this.proxyConfigs = proxyConfigsArg;
this.router.setNewProxyConfigs(proxyConfigsArg);
for (const hostCandidate of this.proxyConfigs) {
const existingHostNameConfig = this.alreadyAddedReverseConfigs[hostCandidate.hostName];
if (!existingHostNameConfig) {
this.alreadyAddedReverseConfigs[hostCandidate.hostName] = hostCandidate;
}
else {
if (existingHostNameConfig.publicKey === hostCandidate.publicKey &&
existingHostNameConfig.privateKey === hostCandidate.privateKey) {
continue;
}
else {
this.alreadyAddedReverseConfigs[hostCandidate.hostName] = hostCandidate;
}
}
this.httpsServer.addContext(hostCandidate.hostName, {
cert: hostCandidate.publicKey,
key: hostCandidate.privateKey,
});
}
}
async addDefaultHeaders(headersArg) {
for (const headerKey of Object.keys(headersArg)) {
this.defaultHeaders[headerKey] = headersArg[headerKey];
}
}
async stop() {
const done = plugins.smartpromise.defer();
this.httpsServer.close(() => {
done.resolve();
});
for (const socket of this.socketMap.getArray()) {
socket.destroy();
}
await done.promise;
clearInterval(this.heartbeatInterval);
console.log('NetworkProxy -> OK: Server has been stopped and all connections closed.');
}
}
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