Hello,


I'm wondering if it's possible to make a module for proxying websockets for nginx.

I read http://www.evanmiller.org/nginx-modules-guide.html#proxying ... From what I understand nginx normally works like this:
1. keep connection with client
2. connect to proxy and make request
3. do something else
4. get response from proxy and reply to client

Now, a websocket connection will drop when it issues the upgrade command to nginx. A couple of questions
1. Does nginx need a persistent connection per client with the proxy to do websocket proxying?
2. For proper websocket proxying would the proxy rather have to be a gateway or tunneling proxy in nature?
3. If 2 holds, does that even fit into the nginx architecture?

I know there is handshake issues with draft 76, but assuming I ignore them, is it possible to implement a websocket proxy to nginx?
If so, can anyone give me some hints on how to do that? If not what would be the alternative? If I were to build a websocket module
for nginx, that does all the handshaking inside nginx, how would the backend notify nginx that there's new data available?

Regards,
Reza