Search and Replace with iRule

OK,

 

 

I have looked into this again and found that using Stream might be the best option, so what I have so far is:

 

 

when HTTP_RESPONSE {

 

 

Disable the stream filter by default

 

STREAM::disable

 

 

Check if response type is text

 

if {[HTTP::header value Content-Type] contains "text" and [HTTP::header "User-Agent"] contains "***"}{

 

 

Replace

 

STREAM::expression "@123@xyz@ @456@xyz@"

 

 

Enable the stream filter for this response only

 

STREAM::enable

 

}

 

}

 

 

However I also need to check the uri as I only want to replace on certain areas. How can I do this? Can I use HTTP_REQUEST with the HTTP_RESPONSE?

Hi,

You can try to use the option string map

if you want to replace for example the directory "admin" by "secret"

 
 when HTTP_REQUEST { 
    if {[HTTP::uri] contains "/admin/"} { 
         HTTP::uri [string map {"/admin/" "/secret/"} [HTTP::uri]] 
    } 
 } 
 

HTH

Hi,

 

 

Thanks for replying, however I am looking to replace the text in the content rather than the URI. I just need to only run the code if the user is requesting a specific area of the site. I.e if someone were to access "http://www.mydomain.com/atoz/ I would want the code to run and replace all the /images/ references to http://www.mydomain.com/images/ but I wouldn't want this to happen on the rest of the site.

Sorry i missed this part then you can try something like this:

   
   when HTTP_REQUEST {    
       set replace_content 0   
       if {[HTTP::uri] contains "/atoz/"} {    
           set replace_content 1    
       }    
    }    
       
   when HTTP_RESPONSE {   
     if {$replace_content equals "1"} {   
          Disable the stream filter by default   
         STREAM::disable   
      
         Check if response type is text   
        if {[HTTP::header value Content-Type] contains "text" and [HTTP::header "User-Agent"] contains "***"}{   
              Replace   
             STREAM::expression "@123@xyz@ @456@xyz@"   
              Enable the stream filter for this response only   
             STREAM::enable   
         }   
     }   
   }    
   

the variable replace_content can be shared as a local variable among all the events you want. This variable will be available for this TCP connection only

Thanks very much, thats exactly what I wanted :-)

 

 

Thanks

 

 

Nick