Replacing hostname in HTTP RESPONSE header using stream profile and/or Irule

Maybe just a typo, but I notice the first two variable assignments in the code above show internal_host and external_host whereas most of the variable references that follow instead refer to internal_hostname and external_hostname.

A few additional things:

1. You definitely need an HTTP profile for this, as the HTTP header replace logic requires it, and you specifically only want to capture and replace HTTP traffic anyway (not anything below HTTP).

2. I would leave the request chunking option at Preserve.

3. Would users actually reference the URL with the included port (ie. https://public.mycompany.com:443 vs. https://public.mycompany.com)?

   when HTTP_REQUEST {
        Disable the stream filter for requests
       STREAM::disable
   
        Remove this header to prevent server from compression response
       HTTP::header remove Accept-Encoding
   }
   when HTTP_RESPONSE {
       set internal_host "host15.mycompany.com:8010" 
       set external_host "public.mycompany.com"
   
        Rewrite the Location header for redirects 
       if { [HTTP::header exists Location] }{ 
           HTTP::header replace Location [string map "$internal_host $external_host" [HTTP::header Location]] 
       } 
   
        Rewrite the response content using a stream profile if it is text 
       if { [HTTP::header Content-Type] contains "text" } { 
   
            Set the stream expression with the find/replace strings 
           STREAM::expression "@$internal_host@$external_host@" 
   
            Enable the stream filter 
           STREAM::enable 
       } 
   } 
   

Maybe a minor modification is in order:

when HTTP_REQUEST {
     Disable the stream filter for requests
    STREAM::disable

     Remove this header to prevent server from compression response
    HTTP::header remove Accept-Encoding
}
when HTTP_RESPONSE {
     Rewrite the Location header for redirects 
    if { [HTTP::header exists Location] }{ 
        HTTP::header replace Location [string map {"http://xyz.company.com:8010" "https://abc.company.com"} [HTTP::header Location]] 
    } 

     Rewrite the response content using a stream profile if it is text 
    if { [HTTP::header Content-Type] contains "text" } { 

         Set the stream expression with the find/replace strings 
        STREAM::expression "@xyz.company.com:8010@abc.company.com@" 

         Enable the stream filter 
        STREAM::enable 
    } 
} 

Add multiple conditions to your string map:

[string map {"old-1" "new" "old-2" "new" "old-3" "new"} [HTTP::header Location]]

Add multiple conditions to your STREAM evaluation:

STREAM::expression "@old-1@new@ @old-2@new@ @old-3@new@" 

Hello , Was there ever a solution for this? We are currently trying to mask an public domain (i.e. "support.com") between browser and the f5, but serve content from the back-end server with "myqadcloud.com" (from f5 to back-end server); and finally on each response from back-end server should ensure all domains used are "support.com" domain. Long story short, in theory, this method would prevent cross domain errors from IFrames within parent windows that contains a different domain name. So in a sense we are fooling the browser that the parent and iframe domain are the same, but the iframe will server content from a different back-end server (myqadcloud.com).

Thoughts on how that can be done?

Thanks in advance.

Traolly Xiong