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Moe_Jartin's avatar
Moe_Jartin
Icon for Cirrus rankCirrus
Aug 03, 2010

Remove Multiple Headers

We have an issue where a SSO application is inserting headers which back end applications use to personalize content. There is a bug in the application software that causes problems if headers are inserted with no value. I have been tasked with writing an irule to fix the issue until the bug is resolved. I have been researching the forums for how to remove all request headers that have a null value but, I still haven't even come close to a working irule.

 

 

I know I need to build an array or set a variable listing the name of each header that has no value and then use the "HTTP::header remove" command to get rid of them. I just have no idea how to get and store the null value header names. HELP???

 

application delivery
dev
devops
iRules

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  • hooleylist's avatar
    hooleylist
    Icon for Cirrostratus rankCirrostratus
    Aug 03, 2010
    Hi Joe,

    Here is an example which will remove request headers that don't have a value: 

    when HTTP_REQUEST {

    Loop through each header by name
   foreach a_header [HTTP::header names] {

       Check if the header value is empty
      if {[HTTP::header $a_header] eq ""}{

          Remove the header
         HTTP::header remove $a_header
      }
   }
}

    Aaron