Modify URI among other things

I'm actually a little confused by that rule. I don't see where it looks at the requested URI and changes it to the new URI. By looking at the rule above, it looks like it's saying to match the requested URI against the data group and if it sees a match, then change the uri back to $uri....or maybe im just not getting it. Can you help me understand it?

 

 

Well, after looking again it looks like the rule needs just a little updating. Try this:

when HTTP_REQUEST {

   set uri [findclass [HTTP::path] uri_class " "]
   if {$line ne ""}{
      HTTP::uri $uri
      node 10.48.52.58 8080
   }
}

With a class where each line looks like:

"original_uri new_uri"

Okay, now for the explanation. What this is doing is looking through the class to find the current HTTP::path (the portion of the URI before the query string). Once it finds the current path in the data group, it will retrieve whatever comes after the separator (the " " in this case) and return that as the value of the findclass.

So, that means that in the above case, assuming [HTTP::path] were "original_uri", the findclass command would return "new_uri". Then the HTTP::uri $uri command sets the uri to be equal to $uri, which we just established was "new_uri".

Basically, you're creating key->value pairs within your data group. The key is whatever is before the space in each string. This should be the original URI that you want to search for. The value comes after the space, and that is whatever you want the original URI to be re-written to. The iRule then automagically goes through and does just that, then sends the connection on to the specified node.

Make sense?

Colin

Yes I think I understand now. Thank you very much for the explanation.

 

 

So when I go to enter a string in the datagroup using the GUI, I will enter it as

 

 

/paymentresponse1.jsf /csu/paymentresonse.jsf

 

/paymenterror1.jsf /csu/paymenterror.jsf

 

/paymentdeclined1.jsf /csu/paymenterror.jsf

 

 

each line being set up as original_uri new_uri?

Exactly. :)

 

 

Colin

Sweet!

 

 

Can I change the last line to this:

 

 

when HTTP_REQUEST {

 

 

set uri [findclass [HTTP::path] uri_class " "]

 

if {$line ne ""}{

 

HTTP::uri $uri

 

pool payment_resp member 10.48.52.58 8080

 

}

 

}

Of course! That should work just fine.

 

 

Colin

Thank you for all of your help. I will test this and hope everything works. :)

Sure thing, let us know if you run into any trouble, or have any other questions.

 

 

Colin

I am using version 9.3.1. Would I still be able to use the findclass command, or should I use matchclass?

findclass should work just fine for you.

 

 

Colin