Rewriting a header inside RESPONSE_DATA

Basically I'm trying to move from an Apache Reverse Proxy to a BIG-IP, and need to know how to replace the functionality of ProxyPassReverse using iRules.

 

 

http://httpd.apache.org/docs-2.0/mod/mod_proxy.htmlproxypassreverse

 

 

I don't have a box to test this on, but here's a start for you.

 
 when HTTP_RESPONSE { 
   set newhost "www.atl.bluecross.ca" 
   if { [HTTP::header host] eq "server1.atl.bluecross.ca" } { 
     HTTP::header replace host $newhost 
     } 
   } 
 

The problem I am having trouble over coming is that I am trying to find a way to basically do the equivalent of "s/http:\/\/server.:8080/https:\/\/bigtest1/" on the location header of the outgoing data. The Apache ProxyPassReverse function handled this for me, and now I need to find a way to duplicate this functionality.

 

 

Is there a way in iRules to do a search and replace of a header?

 

The only way I've found to do it is listed below, but it sucks when Error.jsp has a dynamically generated QUERY_STRING.

 

 

when HTTP_RESPONSE {

 

if { [HTTP::header location] starts_with "http://server1:8080/app/Error.jsp" } {

 

HTTP::header replace location https://bigtest1/app/Error.jsp

 

} elseif { [HTTP::header location] starts_with "http://server2:8080/app/Error.jsp" } {

 

HTTP::header replace location https://bigtest1/app/Error.jsp

 

}

 

}

 

 

I think I have it figured out, far this works the way I want.

 
 when HTTP_RESPONSE { 
  
   set gmpHost "http://server1.atl.bluecross.ca:8080/" 
   set ssoHost "http://server2.atl.bluecross.ca:8080/" 
   set bigHost "https://bigtest1.atl.bluecross.ca/" 
   set location [HTTP::header location] 
  
   if { $location starts_with $gmpHost } { 
     regsub -all $gmpHost $location $bigHost newLocation 
     HTTP::header replace location $newLocation 
   } elseif { [HTTP::header location] starts_with $ssoHost } { 
     regsub -all $ssoHost $location $bigHost newLocation 
     HTTP::header replace location $newLocation 
   } 
 } 
 

You should be able to do this without an iRule. The redirect rewrite option on the HTTP profile should provide the Location header rewrite that you're looking for.