server.js

var express = require('express');
var https = require('https');
var fs = require('fs');

var app = express();
options = {
  key: fs.readFileSync('./conf/key.pem'),
  cert: fs.readFileSync('./conf/cert.pem')
}
var server = https.createServer(options, app);
server.listen(8000);
var io = require('socket.io')(server);
console.log('Running... https://localhost:8000')

app.get('/', function(req, res){
  res.sendFile(__dirname + '/index.html');
});
app.use(express.static('public'));

io.on('connection', function(socket) {
  var room;

    socket.on('join', function(data){
      room = data['room'];
      var io_room = io.sockets.adapter.rooms[room];
      if (io_room === undefined || io_room.length < 2){
        console.log('joined', socket.id, 'to room', room );
        socket.join(room);
        io_room = io.sockets.adapter.rooms[room];
        if (io_room.length == 2)
          socket.broadcast.to(room).emit('requestOffer');
      } else {
        console.log('NOT joined', socket.id, 'to room', room, 'FULL' );
        room = null;
        io.to(socket.id).emit('error', 'full room');
      }
    });

    socket.on('invite', function (sdp){
      socket.broadcast.to(room).emit('invite', sdp);
    });

    socket.on('OK', function (sdp) {
      socket.broadcast.to(room).emit('OK', sdp);
    });

    socket.on('candidate', function(cand){
      socket.broadcast.to(room).emit('candidate', cand);
    });

    socket.on('error', function (error) {
      socket.broadcast.to(room).emit('error', error);
    });

    socket.on('bye', function () {
      console.log('bye', room, socket.id);
      socket.broadcast.to(room).emit('bye');
      socket.leave(room);
      room = null;
    });

    socket.on('disconnect', function () {
      socket.broadcast.to(room).emit('bye');
      console.log('disconnected', room, socket.id);
    });
});