[Twisted-web] 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