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Torti's avatar
Torti
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Jan 07, 2014

tcl error, when modifying http response

Hi guys, We need a custom response for a dedicated validation (XML violation). For this case I did expand the irule with the following lines: when ASM_REQUEST_BLOCKING { set x [...
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uni's avatar
uni
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Jan 07, 2014

It looks to me like it is saying that the HTTP::header command is not allowed within the ASM_REQUEST_BLOCKING event. Kind of strange, given that the example on the ASM_REQUEST_BLOCKING page does just this.

 

Perhaps enclose some of the code in try/catch, and do some extra logging of the payload when it fails.

 

  • uni's avatar
    uni
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    Jan 07, 2014
    Unrelated, but you should use 'contains' not '==' to test for the violation, as [lindex $x 0] is a comma separated list of violations
  • Torti's avatar
    Torti
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    Jan 08, 2014
    The problem is, that I cannot reproduce the error. I did add some extra log and changed to 'contains'. The 'contains' is a little bit strange, because in the wiki is the violation filed described as String. And I did never see a comma seperated list in the log, here. But it really looks like the system has some trouble with the HTTP::header command within the ASM_REQUEST_BLOCKING event. I tried "if { [HTTP::header exists Content-Length] } {}" before removing the header, but then I SOMETIMES get the TCL error: Illegal argument. Can't execute in the current context. (line 1) invoked from within "HTTP::header exists Content-Length"