IRules setting for http redirect then rewrite response

Here is an example which allows you to proxy an external site to an internal one by updating the domain in the requested host header and in the response Location header:

iRule to change host headers

http://devcentral.f5.com/Default.aspx?tabid=53&forumid=5&tpage=1&view=topic&postid=1991719925 (Click here)

 
 when RULE_INIT { 
  
     Set the hostname that the client makes request to (do not include protocol)  
    set ::external_hostname "www.mycompany.co.uk"  
  
     Set the hostname that the BIG-IP will rewrite requests to  
    set ::internal_hostname "www.provider.com"  
  
     Log debug messages to /var/log/ltm? 1=yes, 0=no.  
    set ::proxy_site_debug 1  
 }  
 when HTTP_REQUEST { 
  
    if {$::proxy_site_debug}{log local0. "Received request from [IP::client_addr] -> [HTTP::host][HTTP::uri]"}  
  
    if {$::proxy_site_debug}{log local0. "Rewriting [IP::client_addr]'s Host header to $::internal_hostname"}  
  
     Rewrite the Host header   
    HTTP::header replace "Host" $::internal_hostname  
   
 }  
 when HTTP_RESPONSE {  
  
     Check if the status indicates a redirect  
    if {[HTTP::is_redirect]} {  
  
       if {$::proxy_site_debug}{log local0. "Rewriting [IP::client_addr]'s redirect to \  
 [string map -nocase $::internal_hostname $::external_hostname [HTTP::header Location]]"}  
  
        Rewrite the Location header replacing the internal hostname with the external hostname  
       HTTP::header replace Location [string map -nocase $::internal_hostname $::external_hostname [HTTP::header Location]]  
    }  
 }  
 

Or if you want more complete functionality, take a look at the ProxyPass iRule in the Codeshare (Click here).

Aaron