I have come across Slanger[1] while researching for a good websocket server and it worked well for us. It's basically an open source version of Pusher backend.

I have come across Slanger[1] while researching for a good websocket server and it worked well for us. It's basically an open source version of Pusher backend. You may be interested in their code. [1] https://github.com/stevegraham/slanger https://github.com/stevegraham/slanger