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Jigsaw Filters

Hi!

I'm using Jigsaw 1.0 beta to do some testing and I would like
to make Jigsaw work like a proxy and insert filters which 
intercept incoming requests and their replies, like so:

Client ---(GET)-----> Jigsaw ---(GET')---> OriginServer
                       | /|\
                      \|/ |
                    My REQUEST Filter


Client <--(REPLY')--- Jigsaw <---(REPLY)-- OriginServer
                      /|\ |
                       | \|/
                    My REPLY Filter

I see how to setup my own error filter for intercepting the replies,
similar to the ErrorFilter which comes with the source distribution.
How would I go about inserting a filter which gets instantiated
when a GET request is received?  What format would such a filter 
follow, i.e. what class would I be specializing?  Maybe what I'm
looking for isn't a filter, but something else??

Thanks!

-- Jake
+-----------------------------------------------------+   \||/
|              Jacob W. Anderson                      |    |  @___oo
|      GTE Internetworking, Powered by BBN            |   / (__,,,,|
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          it develops random features."     | \____(      )___) )___
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