http://developers.sribu.com/2015/02/14/how-do-we-make-sribulancer-as-a-realtime-freelancing-platforms/

client.js

// From client side, they just need to subscribe to what they need.
window.realtime.socketIo.emit('subscribe_public', {
  channel: ch
});

// or the private one,
window.realtime.socketIo.emit('subscribe_private', {
  channel: ch, 
  jwt: localStorage.jwt
});

// and listen.
window.realtime.socketIo.on('chat', function (m) {
  console.log(m.html);
})