Hi,

I am trying to write a filter that will sit on a proxy server and alter
HTTP requests. Basically, what I want it to do is modify the User-Agent
header field so that when the request is proxied, the remote web server
gets a different User-Agent header field to the one that was originally
sent by the browser. There are also other header fields I may need to
modify, but I would imagine this is a simple task once I've worked out
how to alter the User-Agent field.

Does anyone have any ideas how I might go about doing this? I've tried
writing several PerlInputFilterHandlers, all with no success. Will input
filters work with a proxy? I've got output filters working with no
problem.

Any sample code to do what I want, along with the relavent Apache
directives would be very much appreciated!



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