nodejs and socket.io chat rooms

Question

Is it possible to create chat rooms dynamically with socket.io ? All the examples I've seen so far had every room declared implicitly. I am looking to achieve something like http://tlk.io/ where you simply create a chat room by accessing a random url, and then allow users in based on certain criteria.

Answer 1

Yes. socket.io has a rooms feature.

From the readme:

var io = require('socket.io').listen(80);

io.sockets.on('connection', function (socket) {
  socket.join('justin bieber fans');
  socket.broadcast.to('justin bieber fans').emit('new fan');
  io.sockets.in('rammstein fans').emit('new non-fan');
});