Can I bind to an event instead of triggering?

[peterwongpp]

I would like to keep a list of online users on the server side for some computations. (I use ruby on rails)

I have seen the example (http://blog.pusher.com/2010/9/22/showing-who-is-online-with-pusher-presence-in-php) which could build the online users list in the client side.

So I would like to know if there is a way to bind an event in the server side?

[leggetter]

Not presently. We are looking at building webhooks which will mean your server is notified when a channel has been subscribed to (subscribers > 1) and then when there are no subscribers (subscribers == 0).

More details about WebHooks can be found in this FAQ

If you are looking to receive any event then there are two solutions:

1. Use the Ruby Client Library although this may require some additional modifications to be fully features.
2. Or, if you would consider using node.js, you could try out the Pusher Pipe. This could of course be ported to an EventMachine library.