My crusade for web content filtering

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Author: KevinSalingnetworkpro@email.com
Date:  
Subject: My crusade for web content filtering
> I use the API in my proxy and feed the data stream
> thru a Perl script to rewrite WWW pages and add my banners.


That's all I'm looking for.  I want to scan the data stream for key words.
If I get a hit, I want to rewrite the page to something like:
<html>
  <body>
    This page is blocked.   :P
  </body>
</html>


This is not possible with squid, true?

...Kevin