RESTful: bidirectional communication

Question

I was wondering if it is possible to have a RESTful web service and a bidirectional communication with the clients and server.

In my case the state on the server can change, so the server should send a message to the clients to update themself. Perhaps that's totally against the RESTful idea.

Can I AJAX help me with this issue?

Thanks!

Answer 1

Not really possible under the standard http paradigm, but check out Comet for a possible workaround on that problem and there is alway polling.