producer-consumer example with web requests

Hi,

I wonder if someone could help me with making of a streaming proxy - I
understand how producers/consumers work with general twisted, but
unsure of the best strategy in case of twisted.web.

So, the problem is as follows: frontend that accepts a request with
some headers I must process and a potentially large body. The latter
I'd like to be able to proxy in a streaming manner to another http
server. Any suggestions?

thanks,
Ilja