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Anthony's avatar
Anthony
Icon for Nimbostratus rankNimbostratus
Sep 27, 2019

TCL error on simple replace header iRule

I'm getting a TCL error from a very simple iRule and cannot understand what scenario would cause it to fail. The iRule does a simple port removal from the host header. when HTTP_REQUEST {    ...
  • Dario_Garrido's avatar
    Dario_Garrido
    Oct 04, 2019

    Try this.

    when HTTP_REQUEST {
   if { [HTTP::host] contains ":" } {
      log local0. "[HTTP::host] becomes [getfield [HTTP::host] {:} 1]"
      HTTP::header replace Host [getfield [HTTP::host] {:} 1]
   }
}

    KR,

    Dario.

Anthony's avatar
Anthony
Icon for Nimbostratus rankNimbostratus
Oct 04, 2019

We're running v12.1.4. It only happens every so often so I don't actually know what is causing it. I did wonder if it was something to do with the string replacement. I prefersetting a varaible before the replacement so I'll do that and see if it stops it.

 

Thanks for your answers.

  • Dario_Garrido's avatar
    Dario_Garrido
    Icon for MVP rankMVP
    Oct 04, 2019

    Sure! let us know if it fixes the issue.

     

    KR,

    Dario.

    • Anthony's avatar
      Anthony
      Icon for Nimbostratus rankNimbostratus
      Oct 04, 2019

      Quick answer is that its generated the same error. 

      TCL error: /Common/remove_port <HTTP_REQUEST> - Operation not supported (line 4)     invoked from within "HTTP::header replace Host $new_host"

      Back to the drawing board...

    • Dario_Garrido's avatar
      Dario_Garrido
      Icon for MVP rankMVP
      Oct 04, 2019

      Try this.

      when HTTP_REQUEST {
   if { [HTTP::host] contains ":" } {
      log local0. "[HTTP::host] becomes [getfield [HTTP::host] {:} 1]"
      HTTP::header replace Host [getfield [HTTP::host] {:} 1]
   }
}

      KR,

      Dario.

    • Anthony's avatar
      Anthony
      Icon for Nimbostratus rankNimbostratus
      Oct 04, 2019

      Thanks Dario, I'll give that a go and see if the errors clear.