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Bruce_Bronczyk's avatar
Bruce_Bronczyk
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Jan 27, 2006

Undefined procedure error

When trying to add this new iRule to our virtual server I am getting this error:

 

 

01070151:3: Rule [pkRouteImageRequests] error:

 

line 1: [undefined procedure: rule] [rule pkRouteImageRequests

 

{

 

when HTTP_REQUEST

 

{

 

if { [regexp {.jpg$} [HTTP::uri]] || [regexp {.gif$} [HTTP::uri]] }

 

use pool parking_image_pool

 

}

 

}]

 

 

Anyone know what it means? The text for this rule is below, I can't find anything wrong with it.

 

 

rule pkRouteImageRequests

 

{

 

when HTTP_REQUEST

 

{

 

if { [regexp {.jpg$} [HTTP::uri]] || [regexp {.gif$} [HTTP::uri]] }

 

use pool parking_image_pool

 

}

 

}

 

 

Thanks!
application delivery
dev
devops
iRules

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  • Joe_Pruitt's avatar
    Joe_Pruitt
    Jan 27, 2006
    iRules don't contain the surrounding "rule rule_name { }" section. That is how it is serialized to the configuration file. If you are adding it from the GUI, only use the event sections, the name is defined in a text box in the GUI. Also, you are missing an opening brace for your if statement.

     

     

    This code should work

     

     

    when HTTP_REQUEST {
  if { [regexp {.jpg$} [HTTP::uri]] || [regexp {.gif$} [HTTP::uri]] } {
    use pool parking_image_pool
  }
}

     

     

    Since you are not really using regular expressions in your search, but are just looking for a string at the end, I'd suggest you replace the regexp with our "ends_with" operator.

     

     

    when HTTP_REQUEST {
  if { ([HTTP::uri] ends_with ".jpg") || ([HTTP::uri] ends_with ".gif") } {
    pool parking_image_pool
  }
}

     

     

    This will perform much better than a regular expression operation.

     

     

    We recommend avoiding regular expressions when at all possible. In some cases it is unavoidable, but if it can be done with a string search command, it will definitely have less impact on the system.

     

     

    -Joe