ASA Regex substitution

[melcara]

I would like to setup a regex substitution rule.  For example with an HTTP response if the work CAT is present I would like to have the ASA change the string to DOG. 

This is not the exact problem I want to solve, but it is concept.  I am running ASA 8.4.1. 

Any ideas?

Thanks

[m.glosson]

That's not really what the ASA is designed to do. That's more the work of something like Apache mod_rewrite, Cisco ACE, or F5 BIG-IP. The ASA is geared toward matching regular expressions, equivalent to UNIX's grep, not altering things, like UNIX's sed...