Forum Discussion

Nimbostratus

Sep 27, 2019

Solved

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

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

Nimbostratus

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
Noctilucent
Oct 04, 2019
Sure! let us know if it fixes the issue.

KR,
Dario.
- Anthony
  Nimbostratus
  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
  Noctilucent
  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
  Nimbostratus
  Oct 04, 2019
  Thanks Dario, I'll give that a go and see if the errors clear.