我如何使用mod_perl2和Apache Bucket Brigades？

I'm writing an application to do proxying and rewriting of webpages on the fly and am pretty settled on using mod_perl2 - there is an existing implementation using mod_perl (v1) that I'm working from. In mod_perl2, there's this idea of APR::Brigades and APR::Buckets which, from my vague understanding, are an efficient way to do the sort of filtering & rewriting that I want. I can't, however, find anything but the Perldoc pages for these modules, so I'm really quite unsure how to utilize them.I'm writing an application to do proxying and r