Rewriting /aaa to /bbb and assigning pool transparently

You are pretty darn close with your pseudo code. Unfortunately, there isn't a "HTTP::uri replace" command. The best way to do it is with the "string map" command. I'd go something like this

 

 

when HTTP_REQUEST {
  switch -glob [HTTP::uri] {
    "/aaa*" {
      HTTP::uri [string map { /aaa /111 } [HTTP::uri]]
      pool 111_pool
    }
    "/bbb*" {
      HTTP::uri [string map { /bbb /222 } [HTTP::uri]]
      pool 222_pool
    }
    "/ccc*" {
      HTTP::uri [string map { /ccc /333 } [HTTP::uri]]
      pool 333_pool
    }
    default {
      HTTP::redirect "https://[HTTP::host]/aaa[HTTP::uri]"
    }
  }
}

 

 

I prefer a switch statement as it's usually cleaner to read, but feel free to do an if/elseif with the starts_with operator if you prefer.

 

 

The string map command will replace all occurrances (important to know if there are multiple occurrances of the first string) of the first string with the second string in the given value. So for the first case above, it will replace all occurrances of "/aaa" with "/111" in the value of [HTTP::uri] and will then return that value with is then assigned to the URI with the surrounding HTTP::uri command (brackets mean return the value, no brackets mean assign it).

 

 

As for modifying the returned traffic, you can build that logic into the iRule by interrogating the HTTP::payload in the HTTP_RESPONSE and HTTP_RESPONSE_DATA events. The SSN Scrubber example in the CodeShare shows how to do this:

 

 

http://devcentral.f5.com/Wiki/default.aspx/iRules/SocialSecurityNumberScrubbing.html

 

Click here

 

 

 

But, a far easier method would be to use the Stream profile (if you have it licensed). This thread talks about how to use the Stream profile

 

 

http://devcentral.f5.com/Default.aspx?tabid=53&view=topic&forumid=5&postid=13504

 

Click here

 

 

 

Hope this helps!

 

 

-Joe