HTTP Respond Data replacing ?

It would be more efficient to use a stream profile and iRule to rewrite the response content compared with collecting the response payload. Here is a generic (untested) example. You could add your request URI rewriting logic to it.

Aaron

 
  LTM configuration object requirements: 
  
  - The virtual server must have an HTTP profile configured 
  - The virtual server must have a blank STREAM profile configured 
  - The virtual server must have a default pool configured 
  
  iRule configuration requirements: 
  
  - Debug can be enabled/disabled in the RULE_INIT event by setting ::rewrite_debug to 1 or 0 respectively. 
  - Outside the RULE_INIT section, no other changes should need to be made. 
  
 when RULE_INIT { 
  
     Log debug messages to /var/log/ltm? 1=yes, 0=no 
    set ::rewrite_debug 1 
  
     String to find in response headers and/or data 
    set ::find "oldname.example.com" 
  
     String to replace in response headers and/or data 
    set ::replace "newname.example.com" 
 } 
 when HTTP_REQUEST { 
  
    if {$::rewrite_debug}{log local0. "[IP::client_addr]:[TCP::client_port]: New HTTP request to [HTTP::host][HTTP::uri]"} 
  
    HTTP::header remove "Accept-Encoding" 
    if {$::rewrite_debug}{log local0. "[IP::client_addr]:[TCP::client_port]: Removing Accept-Encoding request header"} 
 } 
 when HTTP_RESPONSE { 
  
     Rewrite Location header value in HTTP redirects if it contains the $::find string 
       if {[HTTP::is_redirect] && [string tolower [HTTP::header "Location"]] contains $::find}{ 
  
           Replace $::find with $::replace in Location header value 
          HTTP::header replace Location [string map "$::find $::replace" [HTTP::header replace Location]] 
  
          if {$::rewrite_debug}{log local0. "[IP::client_addr]:[TCP::client_port]: Updated location from [HTTP::header replace Location]\ 
             to [string map "$::find $::replace" [HTTP::header replace Location]]"} 
       } 
  
        Rewrite the response body if the response type is text 
       if { [HTTP::header "Content-Type"] starts_with "text/" } { 
  
           Configure the find/replace strings 
          STREAM::expression "@$::find@$::replace@" 
  
           Enable the stream filter 
          STREAM::enable 
  
          if {$::rewrite_debug}{log local0. "[IP::client_addr]:[TCP::client_port]: Enabled stream filter for $::find -> $::replace"} 
  
       } else { 
  
           Disable the stream filter for non-text responses 
          STREAM::disable 
       } 
    } 
 }