app.js

// This is the node.js server application                                                                                                                                                                                                     
var WebSocketServer = require('websocket').server;
var https = require('https');
var fs = require('fs');
var clients = []; 


var options = { 
  key: fs.readFileSync('webrtcwwsocket-key.pem'),
  cert: fs.readFileSync('webrtcwwsocket-cert.pem'),
};

var server = https.createServer(options, function(request, response) {
  fs.readFile(__dirname + '/index.html',
  function (err, data) {
    if (err) {
      response.writeHead(500);
      return response.end('Error loading index.html');
    }   
    response.writeHead(200);
    response.end(data);
  }); 
});

server.listen(443, function() {
  console.log((new Date()) + " Server is listening on port 443");
});

// create the server
wsServer = new WebSocketServer({
    httpServer: server
});

function sendCallback(err) {
    if (err) console.error("send() error: " + err);
}

// This callback function is called every time someone
// tries to connect to the WebSocket server
wsServer.on('request', function(request) {
    console.log((new Date()) + ' Connection from origin ' + request.origin + '.');
    var connection = request.accept(null, request.origin);
    console.log(' Connection ' + connection.remoteAddress);
    clients.push(connection);
    
    // This is the most important callback for us, we'll handle
    // all messages from users here.
    connection.on('message', function(message) {
        if (message.type === 'utf8') {
            // process WebSocket message
            console.log((new Date()) + ' Received Message ' + message.utf8Data);
            // broadcast message to all connected clients
            clients.forEach(function (outputConnection) {
                if (outputConnection != connection) {
                  outputConnection.send(message.utf8Data, sendCallback);
                }   
            }); 
        }   
    }); 
    
    connection.on('close', function(connection) {
        // close user connection
        console.log((new Date()) + " Peer disconnected.");    
    }); 
});