...of some awesome posts, beginning with writing a caching HTTP proxy.
If you are proxying to one host check out:
http://www.slideshare.net/ranguard/plack-basics-for-perl-websites-yapceu-2011 (slide 229 onwards)
Hope that's of use
Perl hacker - small Scriptlets, useful tools or fancy enterprisey application, I'm doing the job with Perl.