Whats is the correct message sequence for nginx server?

[Maxim Dounin]

Hello!

On Wed, Oct 23, 2013 at 02:15:48PM -0400, hemant_psu wrote:

> I am running nginx-1.5 server and sending chrome browser simple websocket
> request. My nginx server is confgiured with hello module which is supposed
> to send "Hello world" in response. 
> 
> As per RFC for websocket, a sever is supposed to send "switching protocol
> message "as ACK for connection upgrade request message. 
> In my wireshark capture, I do see connection upgrade request message but in
> response, I see HTTP 1.1 200 0K message with "Hello World" 
> text on data portion of HTTP payload.
> 
> I am confused in terms of response, thinking my nginx server should have
> first sent connection upgrade response acknowledgement before responding
> with text data.  Can anyone please suggest the right behaviour of nginx
> server when it gets a Connection upgrade request message.

You can't make an arbitrary nginx module to talk via WebSocket 
protocol, this isn't going to work.

What you can is to use nginx to proxy WebSocket connections to 
some WebSocket backend server using proxy_pass, as documented 
here:

http://nginx.org/en/docs/http/websocket.html

Note that you need an actual backend server handling WebSocket 
connections for proxying to work.

-- 
Maxim Dounin
http://nginx.org/en/donation.html