Modify URI among other things

Which LTM version are you running? Do you want to have an old URI, new URI and pool for each datagroup element?

 

 

Aaron

I am running v9. I am not completely sure about what you are asking.

 

 

The old URI will determine what the new URI will be. So if the old is /paymentresponse1.jsf the new one would be /CSU/paymentresponse.jsf. If it is /paymenterror1.jsf the new one will be /CSU/paymenterror.jsf

 

I wrote this iRule but I think there should be a more efficient way of doing it. This rule doesnt use a datagroup. I wanted to use a datagroup because I plan on creating a rule that will include other members in a pool and including different possible URIs.

 

 

In the future there could be a PaymentResponse2.jsf and PaymentResponse3.jsf...if it's PaymentResponse2.jsf it'll go to a different host and if it's PaymentResponse3.jsf it'll go to another host.

 

 

The way I wanted to set up the datagroups was to group all the URIs with a 1 in them together, the ones with a 2 together, and the ones with a 3 together.

 

 

when HTTP_REQUEST {

 

 

set uri [HTTP::uri]

 

 

if { [HTTP::uri] equals "/PaymentResponse1.jsf"}{

 

HTTP::uri "/CSU/PaymentResponse.jsf"

 

pool payment_resp member 10.48.52.58 8080

 

log local0. "Received req1 response for $uri"

 

}

 

elseif { [HTTP::uri] equals "/PaymentError1.jsf"}{

 

HTTP::uri "/CSU/PaymentError.jsf"

 

pool payment_resp member 10.48.52.58 8080

 

log local0. "Received req1 response for $uri"

 

}

 

elseif { [HTTP::uri] equals "/PaymentDeclined1.jsf"}{

 

HTTP::uri "/CSU/PaymentDecline.jsf"

 

pool payment_resp member 10.48.52.58 8080

 

log local0. "Received req1 response for $uri"

 

}

 

elseif { [HTTP::uri] equals "/PaymentSuccess1.jsf"}{

 

HTTP::uri "/CSU/PaymentSuccess.jsf"

 

pool payment_resp member 10.48.52.58 8080

 

log local0. "Received req1 response for $uri"

 

}

 

elseif { [HTTP::uri] equals "/PaymentTimeOut1.jsf"}{

 

HTTP::uri "/CSU/PaymentTimeOut.jsf"

 

pool payment_resp member 10.48.52.58 8080

 

log local0. "Received req1 response for $uri"

 

}

 

}

For 9.x you could create a string datagroup which has the following fields:

original_uri new_uri node_ip node_port

/PaymentResponse1.jsf /CSU/PaymentResponse.jsf 10.48.52.58 8080

You could use the findclass command to look up the requested URI against the datagroup. If you find a matching line using [lindex $line 0] to get the new URI, [lindex $line 1] to get the IP and [lindex $line 1] to get the port.

Here's an untested example:

when HTTP_REQUEST {

   set line [findclass [HTTP::path] uri_class]
   if {$line ne ""}{
      HTTP::uri [lindex $line 0]
      node [lindex $line 1] [lindex $line 2]
   }
}

Aaron

Or if you are using the same node address and port for all the entries in the datagroup, you could change leave that out of the datagroup:

original_uri new_uri datagroup

/PaymentResponse1.jsf /CSU/PaymentResponse.jsf

when HTTP_REQUEST {

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

If you're on 9.4.3 or lower you'll want to add a $:: prefix to the datagroup name in the iRule.

Aaron

Can you please explain the following line?

 

 

if {$line ne ''''}

 

In his original example he was doing :

 

 

set line [findclass [HTTP::path] uri_class]

 

 

So the if $line ne "" makes more sense. In the second example you'd need to change it to "if {$uri ne ""} {"

 

 

All he's doing is making sure that the URI or path in question was found in the class and didn't return a null result.

 

 

Colin

So it should look like this?

 

 

when HTTP_REQUEST {

 

 

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

 

if {$uri ne ""}{

 

HTTP::uri $uri

 

node 10.48.52.58 8080

 

}

 

}

 

So it should look like this?

 

 

when HTTP_REQUEST {

 

 

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

 

if {$uri ne ""}{

 

HTTP::uri $uri

 

node 10.48.52.58 8080

 

}

 

}

 

Yep, that looks right to me.

 

 

Colin