Mapping requests and responses

[divya84]

I am currently using nginx as a reverse proxy. I want to be able to map a
requests to its corresponding 
response. For example, I want to log some parts of a user request (say form
field values in a POST request) 
along with the set-cookie that was set in the corresponding response header.


Would this be easy to create an add-on that performs this functionality. If
yes, could you point me to any 
relevant modules that might help?

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,253080,253080#msg-253080