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// Load environment variables from appropriate file
const envFile = process.env.NODE_ENV === 'production' ? '.env.production' : '.env.local';
require('dotenv').config({ path: envFile });
// Workaround for Next.js 15.3.3 Watchpack issue
process.env.NODE_ENV = process.env.NODE_ENV || 'development';
const { createServer } = require('https');
const { createServer: createHttpServer } = require('http');
const { parse } = require('url');
const fs = require('fs');
const path = require('path');
const next = require('next');
const WebSocket = require('ws');
const os = require('os');
const dev = process.env.NODE_ENV !== 'production';
const hostname = process.env.HOSTNAME || '0.0.0.0'; // Allow network access
const port = process.env.PORT || 3000;
const httpsPort = process.env.HTTPS_PORT || 3443;
// Global variables for WebSocket management
global.wsClients = new Map();
global.wsRoomSubscriptions = new Map();
global.wsUserPresence = new Map();
// Helper function to get network IP
const getNetworkIP = () => {
const interfaces = os.networkInterfaces();
for (const name of Object.keys(interfaces)) {
for (const iface of interfaces[name]) {
if (iface.family === 'IPv4' && !iface.internal) {
return iface.address;
}
}
}
return '15.235.50.60';
};
// HTTPS configuration
const getHttpsOptions = () => {
try {
// Try network certificates first (supports IP addresses)
const networkKeyPath = path.join(__dirname, 'certificates', 'network-key.pem');
const networkCertPath = path.join(__dirname, 'certificates', 'network-cert.pem');
if (fs.existsSync(networkKeyPath) && fs.existsSync(networkCertPath)) {
console.log('🌐 Using network certificates (supports IP addresses)');
return {
key: fs.readFileSync(networkKeyPath),
cert: fs.readFileSync(networkCertPath)
};
}
// Fallback to localhost certificates
const keyPath = path.join(__dirname, 'certificates', 'localhost-key.pem');
const certPath = path.join(__dirname, 'certificates', 'localhost.pem');
if (fs.existsSync(keyPath) && fs.existsSync(certPath)) {
console.log('🏠 Using localhost certificates (localhost only)');
return {
key: fs.readFileSync(keyPath),
cert: fs.readFileSync(certPath)
};
}
} catch (error) {
console.warn('Could not load HTTPS certificates:', error.message);
}
return null;
};
// Workaround for Next.js 15.3.3 Watchpack issue
const app = next({
dev,
hostname,
port,
// Add custom webpack config to avoid Watchpack issues
webpack: (config, { isServer }) => {
if (!isServer) {
config.watchOptions = {
poll: 1000,
aggregateTimeout: 300,
};
}
return config;
}
});
const handle = app.getRequestHandler();
function initializeWebSocketServer(server) {
// Prevent multiple instances of the WebSocket server in development
if (global.wsServer) {
console.log('WebSocket server is already running.');
return;
}
const wss = new WebSocket.Server({ noServer: true });
global.wsServer = wss;
const clients = global.wsClients;
const roomSubscriptions = global.wsRoomSubscriptions;
const userPresence = global.wsUserPresence;
// Make clients accessible globally for debug endpoints
global.wsClients = clients;
/**
* Broadcasts the updated list of participants to everyone in a room.
* @param {string} roomId The ID of the room.
*/
const broadcastParticipantList = (roomId) => {
const participants = [];
if (roomSubscriptions.has(roomId)) {
for (const ws of roomSubscriptions.get(roomId)) {
const clientInfo = clients.get(ws);
if (clientInfo) {
// Avoid adding duplicates if a user has multiple connections
if (!participants.some(p => p.id === clientInfo.user.id)) {
participants.push(clientInfo.user);
}
}
}
}
const message = JSON.stringify({
type: 'PARTICIPANT_LIST_UPDATE',
data: { roomId, participants },
});
if (roomSubscriptions.has(roomId)) {
roomSubscriptions.get(roomId).forEach(ws => ws.send(message));
}
};
// Handle server upgrade requests to switch to WebSocket protocol
server.on('upgrade', (request, socket, head) => {
const { pathname } = parse(request.url, true);
const clientIP = request.socket.remoteAddress;
const origin = request.headers.origin;
console.log(`[${new Date().toISOString()}] 🔌 WebSocket upgrade request from ${clientIP} to ${pathname}`);
if (pathname === '/_ws') {
// SECURITY: Origin validation to prevent Cross-Site WebSocket Hijacking (CSWH)
const allowedOrigins = [
'https://15.235.50.60:3443',
'https://127.0.0.1:3443',
'https://10.119.255.188:3443',
'http://15.235.50.60:3000',
'http://127.0.0.1:3000',
'http://10.119.255.188:3000'
];
if (origin && !allowedOrigins.includes(origin)) {
console.log(`[${new Date().toISOString()}] 🚨 SECURITY: Rejecting WebSocket from unauthorized origin: ${origin}`);
socket.destroy();
return;
}
console.log(`[${new Date().toISOString()}] ✅ Accepting WebSocket upgrade for /_ws from ${clientIP} (Origin: ${origin || 'none'})`);
wss.handleUpgrade(request, socket, head, (ws) => {
wss.emit('connection', ws, request);
});
} else if (pathname === '/_next/webpack-hmr') {
console.log(`[${new Date().toISOString()}] ✅ Allowing Next.js HMR WebSocket from ${clientIP}`);
// Allow Next.js HMR WebSocket connections
return;
} else {
console.log(`[${new Date().toISOString()}] ❌ Rejecting WebSocket upgrade for unknown path: ${pathname} from ${clientIP}`);
socket.destroy();
}
});
wss.on('connection', (ws, req) => {
const url = new URL(req.url, `http://${req.headers.host}`);
// SECURITY: Support both new token format and legacy format during transition
const token = url.searchParams.get('token');
const legacyUserId = url.searchParams.get('userId');
const legacyUser = url.searchParams.get('user');
const legacyConnId = url.searchParams.get('connId');
let userId, user, connId;
if (token) {
// NEW SECURE TOKEN FORMAT
try {
const decoded = JSON.parse(Buffer.from(token, 'base64').toString());
userId = decoded.userId;
connId = decoded.connId || 'unknown';
user = {
id: decoded.userId,
name: decoded.name,
};
// SECURITY: Token age validation (prevent replay attacks)
const tokenAge = Date.now() - decoded.timestamp;
if (tokenAge > 300000) { // 5 minutes max token age
console.log(`[${new Date().toISOString()}] 🚨 SECURITY: Token expired (age: ${tokenAge}ms)`);
ws.close(1008, 'Token expired');
return;
}
console.log(`[${new Date().toISOString()}] ✅ Secure token authentication for user: ${user.name} (${userId}) [${connId}]`);
} catch (error) {
console.log(`[${new Date().toISOString()}] 🚨 SECURITY: Invalid token format:`, error.message);
ws.close(1008, 'Invalid token format');
return;
}
} else if (legacyUserId && legacyUser) {
// LEGACY FORMAT (temporarily supported for transition)
try {
userId = legacyUserId;
user = JSON.parse(decodeURIComponent(legacyUser));
connId = legacyConnId || 'unknown';
console.log(`[${new Date().toISOString()}] ⚠️ LEGACY: Using legacy authentication for user: ${user.name} (${userId}) [${connId}]`);
} catch (error) {
console.log(`[${new Date().toISOString()}] 🚨 SECURITY: Invalid legacy user format:`, error.message);
ws.close(1008, 'Invalid user data');
return;
}
} else {
console.log(`[${new Date().toISOString()}] 🚨 SECURITY: No authentication provided`);
ws.close(1008, 'Authentication required');
return;
}
if (!userId || !user.id) {
console.log(`[${new Date().toISOString()}] 🚨 SECURITY: Connection rejected - invalid user data in token`);
ws.close(1008, 'Invalid user data');
return;
}
console.log(`[${new Date().toISOString()}] ✅ WebSocket connection established for user: ${user.name} (${userId}) [${connId}]`);
// SECURITY: Rate limiting per connection
const rateLimiter = {
messages: 0,
lastReset: Date.now(),
maxMessages: 100, // Max 100 messages per minute per connection
windowMs: 60000
};
// Set user presence to online
userPresence.set(userId, {
status: 'online',
lastSeen: Date.now(),
currentRoom: null
});
const clientInfo = { userId, user, rooms: new Set(), isAlive: true, connId, rateLimiter };
clients.set(ws, clientInfo);
// Also store client info on the WebSocket instance for API access
ws.clientInfo = clientInfo;
// Broadcast presence update
const presenceMessage = JSON.stringify({
type: 'PRESENCE_UPDATE',
data: {
userId,
status: 'online',
timestamp: Date.now()
}
});
// Broadcast to all connected clients
wss.clients.forEach(client => {
if (client.readyState === WebSocket.OPEN) {
try {
client.send(presenceMessage);
} catch (error) {
console.error(`[${new Date().toISOString()}] Error broadcasting presence message:`, error);
}
}
});
ws.on('message', (data) => {
const clientInfo = clients.get(ws);
if (!clientInfo) return;
// SECURITY: Rate limiting check
const now = Date.now();
if (now - clientInfo.rateLimiter.lastReset > clientInfo.rateLimiter.windowMs) {
clientInfo.rateLimiter.messages = 0;
clientInfo.rateLimiter.lastReset = now;
}
if (clientInfo.rateLimiter.messages >= clientInfo.rateLimiter.maxMessages) {
console.log(`[${new Date().toISOString()}] 🚨 SECURITY: Rate limit exceeded for user ${userId}, closing connection`);
ws.close(1008, 'Rate limit exceeded');
return;
}
clientInfo.rateLimiter.messages++;
// Heartbeat check
if (data.toString() === '{"type":"ping"}') {
clientInfo.isAlive = true;
ws.send(JSON.stringify({ type: 'pong' }));
return;
}
try {
const message = JSON.parse(data);
// SECURITY: Input validation
if (!message || typeof message !== 'object' || !message.type) {
console.log(`[${new Date().toISOString()}] 🚨 SECURITY: Invalid message format from user ${userId}`);
return;
}
// SECURITY: Message type validation (whitelist)
const allowedTypes = [
'JOIN_ROOM', 'LEAVE_ROOM', 'CHAT_MESSAGE', 'DIRECT_MESSAGE', 'TYPING_START', 'TYPING_STOP',
'webrtc-offer', 'webrtc-answer', 'webrtc-ice-candidate', 'webrtc-end-call',
'webrtc-call-rejected', 'webrtc-call-accepted', 'webrtc-call-cancelled', 'ping', 'pong'
];
if (!allowedTypes.includes(message.type)) {
console.log(`[${new Date().toISOString()}] 🚨 SECURITY: Unauthorized message type '${message.type}' from user ${userId}`);
return;
}
switch (message.type) {
case 'JOIN_ROOM': {
const { chatRoomId } = message.data;
if (chatRoomId) {
if (!roomSubscriptions.has(chatRoomId)) {
roomSubscriptions.set(chatRoomId, new Set());
}
roomSubscriptions.get(chatRoomId).add(ws);
clientInfo.rooms.add(chatRoomId);
// Update user presence with current room
if (userPresence.has(clientInfo.userId)) {
userPresence.set(clientInfo.userId, {
...userPresence.get(clientInfo.userId),
currentRoom: chatRoomId
});
}
console.log(`[${new Date().toISOString()}] User ${clientInfo.user.name} joined room ${chatRoomId}`);
broadcastParticipantList(chatRoomId);
// Send acknowledgment if required
if (message.requiresAck) {
ws.send(JSON.stringify({
type: 'MESSAGE_ACK',
data: { messageId: message.id, success: true }
}));
}
}
break;
}
case 'LEAVE_ROOM': {
const { chatRoomId } = message.data;
if (chatRoomId && roomSubscriptions.has(chatRoomId)) {
roomSubscriptions.get(chatRoomId).delete(ws);
clientInfo.rooms.delete(chatRoomId);
// Update user presence
if (userPresence.has(clientInfo.userId)) {
const presence = userPresence.get(clientInfo.userId);
if (presence.currentRoom === chatRoomId) {
userPresence.set(clientInfo.userId, {
...presence,
currentRoom: null
});
}
}
console.log(`[${new Date().toISOString()}] User ${clientInfo.user.name} left room ${chatRoomId}`);
broadcastParticipantList(chatRoomId);
// Send acknowledgment if required
if (message.requiresAck) {
ws.send(JSON.stringify({
type: 'MESSAGE_ACK',
data: { messageId: message.id, success: true }
}));
}
}
break;
}
case 'PRESENCE_UPDATE': {
const { status } = message.data;
if (userPresence.has(clientInfo.userId)) {
userPresence.set(clientInfo.userId, {
...userPresence.get(clientInfo.userId),
status,
lastSeen: Date.now()
});
// Broadcast presence update to all clients
const presenceMessage = JSON.stringify({
type: 'PRESENCE_UPDATE',
data: {
userId: clientInfo.userId,
status,
timestamp: Date.now()
}
});
wss.clients.forEach(client => {
if (client.readyState === WebSocket.OPEN) {
client.send(presenceMessage);
}
});
}
break;
}
case 'DIRECT_MESSAGE': {
// Handle direct messages between users
const { recipientId } = message.data;
if (recipientId) {
const outboundMessage = JSON.stringify(message);
// Find the recipient's WebSocket connection(s)
clients.forEach((clientInfo, clientWs) => {
if (clientInfo.userId === recipientId && clientWs.readyState === WebSocket.OPEN) {
clientWs.send(outboundMessage);
}
});
console.log(`[${new Date().toISOString()}] Direct message sent from ${clientInfo.user.name} to user ${recipientId}`);
}
break;
}
case 'CHAT_MESSAGE': {
const { chatRoomId } = message.data;
if (chatRoomId && roomSubscriptions.has(chatRoomId)) {
const outboundMessage = JSON.stringify(message);
roomSubscriptions.get(chatRoomId).forEach(clientWs => {
if (clientWs.readyState === WebSocket.OPEN) {
clientWs.send(outboundMessage);
}
});
// Send acknowledgment if required
if (message.requiresAck) {
ws.send(JSON.stringify({
type: 'MESSAGE_ACK',
data: { messageId: message.id, success: true }
}));
}
}
break;
}
case 'TYPING': {
const { roomId } = message.data;
if (roomId && roomSubscriptions.has(roomId)) {
const outboundMessage = JSON.stringify(message);
roomSubscriptions.get(roomId).forEach(clientWs => {
if (clientWs !== ws && clientWs.readyState === WebSocket.OPEN) {
clientWs.send(outboundMessage);
}
});
}
break;
}
case 'ping': {
// Enhanced ping with latency measurement
ws.send(JSON.stringify({
type: 'pong',
timestamp: Date.now()
}));
// Mark client as alive when they send ping
if (clientInfo) {
clientInfo.isAlive = true;
}
break;
}
case 'pong': {
// Client responded to our ping - mark as alive
if (clientInfo) {
clientInfo.isAlive = true;
console.log(`[${new Date().toISOString()}] Received pong from ${clientInfo.user.name} - connection healthy`);
}
break;
}
// WebRTC Signaling for Video Calls
case 'webrtc-offer':
case 'webrtc-answer':
case 'webrtc-ice-candidate':
case 'webrtc-end-call':
case 'webrtc-call-rejected':
case 'webrtc-call-accepted':
case 'webrtc-call-cancelled': {
const { recipientId } = message.data;
if (recipientId) {
const signalMessage = JSON.stringify({
type: message.type,
senderId: clientInfo.userId,
senderName: clientInfo.user.name || 'Unknown User',
data: message.data
});
// DEBUG: Log all connected user IDs to help identify the issue
console.log(`🔍 DEBUG - WebRTC signaling attempt:`);
console.log(`🔍 Sender: ${clientInfo.user.name} (${clientInfo.userId})`);
console.log(`🔍 Looking for recipient: ${recipientId}`);
console.log(`🔍 Currently connected users:`);
const connectedUserIds = [];
clients.forEach((info, ws) => {
const status = ws.readyState === WebSocket.OPEN ? 'OPEN' : 'CLOSED';
console.log(`🔍 - ${info.user.name} (${info.userId}) [${status}]`);
connectedUserIds.push(info.userId);
});
console.log(`🔍 Total connected users: ${connectedUserIds.length}`);
// Find the recipient's WebSocket connection
let signalSent = false;
clients.forEach((recipientInfo, clientWs) => {
if (recipientInfo.userId === recipientId && clientWs.readyState === WebSocket.OPEN) {
try {
clientWs.send(signalMessage);
signalSent = true;
console.log(`✅ Sending WebRTC signal to ${recipientInfo.user.name} (${recipientInfo.userId})`);
} catch (error) {
console.error(`[${new Date().toISOString()}] Error sending WebRTC signal:`, error);
}
}
});
if (!signalSent) {
console.log(`❌ Recipient ${recipientId} not found in connected users`);
console.log(`💡 Possible causes:`);
console.log(`💡 1. User disconnected/logged out`);
console.log(`💡 2. Wrong user ID being used`);
console.log(`💡 3. User connected to different server instance`);
console.log(`💡 4. Browser tab closed or refreshed`);
// Send error back to caller
ws.send(JSON.stringify({
type: 'webrtc-error',
error: 'RECIPIENT_OFFLINE',
message: 'The user you are trying to call is not currently online',
recipientId: recipientId
}));
console.log(`WebRTC ${message.type} from ${clientInfo.user.name} to ${recipientId}: recipient offline`);
}
}
break;
}
}
} catch (error) {
console.error('Failed to process message:', data.toString(), error);
}
});
ws.on('close', (code, reason) => {
const clientInfo = clients.get(ws);
if (clientInfo) {
console.log(`[${new Date().toISOString()}] WebSocket connection closed for user ${clientInfo.user.name} [${clientInfo.connId || 'unknown'}] - Code: ${code}, Reason: ${reason || 'No reason provided'}`);
// Update user presence to offline
if (userPresence.has(clientInfo.userId)) {
userPresence.set(clientInfo.userId, {
...userPresence.get(clientInfo.userId),
status: 'offline',
lastSeen: Date.now(),
currentRoom: null
});
// Broadcast presence update
const presenceMessage = JSON.stringify({
type: 'PRESENCE_UPDATE',
data: {
userId: clientInfo.userId,
status: 'offline',
timestamp: Date.now()
}
});
wss.clients.forEach(client => {
if (client.readyState === WebSocket.OPEN) {
client.send(presenceMessage);
}
});
}
clientInfo.rooms.forEach(roomId => {
if (roomSubscriptions.has(roomId)) {
roomSubscriptions.get(roomId).delete(ws);
if (roomSubscriptions.get(roomId).size === 0) {
roomSubscriptions.delete(roomId);
console.log(`[${new Date().toISOString()}] Room ${roomId} is now empty and removed.`);
} else {
broadcastParticipantList(roomId);
}
}
});
clients.delete(ws);
// Clean up client info from WebSocket instance
delete ws.clientInfo;
}
});
ws.on('error', (error) => {
const clientInfo = clients.get(ws);
console.error(`[${new Date().toISOString()}] WebSocket error for user ${clientInfo ? clientInfo.user.name : 'unknown'}:`, error);
});
});
// Set up a heartbeat to clean up disconnected clients.
const interval = setInterval(() => {
wss.clients.forEach((ws) => {
const clientInfo = clients.get(ws);
if (clientInfo) {
if (!clientInfo.isAlive) {
console.log(`[${new Date().toISOString()}] Terminating unresponsive connection for user ${clientInfo.user.name}`);
return ws.terminate();
}
clientInfo.isAlive = false;
// Send ping to check if client is responsive
try {
ws.send(JSON.stringify({ type: 'ping', timestamp: Date.now() }));
} catch (error) {
console.error(`[${new Date().toISOString()}] Error sending ping to ${clientInfo.user.name}:`, error);
ws.terminate();
}
}
});
}, 120000); // Increased from 60s to 120s (2 minutes) to be more forgiving for idle users
wss.on('close', () => {
clearInterval(interval);
});
console.log('WebSocket server initialized and attached to the HTTP server.');
}
app.prepare().then(() => {
console.log('📦 Next.js app prepared successfully');
const httpsOptions = getHttpsOptions();
console.log('🔐 HTTPS options:', httpsOptions ? 'Found certificates' : 'No certificates');
// Create HTTP server (redirects to HTTPS if certificates available)
const httpServer = createHttpServer((req, res) => {
try {
// Debug endpoint to check connected WebSocket users
if (req.url === '/debug/websocket-users') {
const connectedUsers = [];
if (typeof clients !== 'undefined') {
clients.forEach((info, ws) => {
connectedUsers.push({
userId: info.userId,
userName: info.user.name,
userEmail: info.user.email,
connectionId: info.connId,
isAlive: info.isAlive,
wsState: ws.readyState,
wsStateText: ws.readyState === 0 ? 'CONNECTING' :
ws.readyState === 1 ? 'OPEN' :
ws.readyState === 2 ? 'CLOSING' : 'CLOSED',
rooms: Array.from(info.rooms || [])
});
});
}
res.writeHead(200, { 'Content-Type': 'application/json' });
res.end(JSON.stringify({
timestamp: new Date().toISOString(),
totalConnectedUsers: connectedUsers.length,
users: connectedUsers
}, null, 2));
return;
}
// In development with HTTPS available, redirect to HTTPS
if (httpsOptions) {
const host = req.headers.host?.replace(`:${port}`, `:${httpsPort}`);
res.writeHead(301, {
Location: `https://${host}${req.url}`
});
res.end();
return;
}
const parsedUrl = parse(req.url, true);
handle(req, res, parsedUrl);
} catch (err) {
console.error('Error handling request:', err);
res.statusCode = 500;
res.end('Internal Server Error');
}
});
httpServer.listen(port, '0.0.0.0', (err) => {
if (err) throw err;
console.log(`> HTTP server ready on http://0.0.0.0:${port}`);
console.log(`> 🌐 Server accessible on network at http://${getNetworkIP()}:${port}`);
if (httpsOptions) {
console.log(`> ⚠️ HTTP redirects to HTTPS for video calling support`);
} else {
console.log('> ⚠️ HTTPS certificates not found. Video calling may not work.');
console.log('> Run "npm run generate-certificates" to create HTTPS certificates.');
}
});
httpServer.on('error', (err) => {
console.error('HTTP Server error:', err);
});
// Start HTTPS server if certificates are available
if (httpsOptions) {
const httpsServer = createServer(httpsOptions, (req, res) => {
try {
// Debug endpoint to check connected WebSocket users
if (req.url === '/debug/websocket-users') {
const connectedUsers = [];
if (typeof clients !== 'undefined') {
clients.forEach((info, ws) => {
connectedUsers.push({
userId: info.userId,
userName: info.user.name,
userEmail: info.user.email,
connectionId: info.connId,
isAlive: info.isAlive,
wsState: ws.readyState,
wsStateText: ws.readyState === 0 ? 'CONNECTING' :
ws.readyState === 1 ? 'OPEN' :
ws.readyState === 2 ? 'CLOSING' : 'CLOSED',
rooms: Array.from(info.rooms || [])
});
});
}
res.writeHead(200, { 'Content-Type': 'application/json' });
res.end(JSON.stringify({
timestamp: new Date().toISOString(),
totalConnectedUsers: connectedUsers.length,
users: connectedUsers
}, null, 2));
return;
}
const parsedUrl = parse(req.url, true);
handle(req, res, parsedUrl);
} catch (err) {
console.error('Error handling HTTPS request:', err);
res.statusCode = 500;
res.end('Internal Server Error');
}
});
httpsServer.listen(httpsPort, '0.0.0.0', (err) => {
if (err) {
console.error('Error starting HTTPS server:', err);
return;
}
console.log(`> ✅ HTTPS server ready on https://0.0.0.0:${httpsPort}`);
console.log(`> 🌐 Server accessible on network at https://${getNetworkIP()}:${httpsPort}`);
console.log(`> 🎥 Video calling enabled with secure connection!`);
console.log(`> 🔌 WebSocket endpoint: wss://0.0.0.0:${httpsPort}/_ws`);
});
httpsServer.on('error', (err) => {
console.error('HTTPS Server error:', err);
});
// Initialize WebSocket server on HTTPS server
initializeWebSocketServer(httpsServer);
} else {
// Initialize WebSocket server on HTTP server if no HTTPS
console.log('> ⚠️ Running without HTTPS - video calling will not work');
initializeWebSocketServer(httpServer);
}
// Note: API endpoints moved to Next.js API routes
// /api/user/online-status/[userId].js and /api/users/online.js
});