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Ingo's avatar
Icon for Nimbostratus rankNimbostratus
Aug 02, 2021

HTTP:uri in HTTP_Request error (not supported)



we are using the below simple irule since years. However, with version 14.x.x or so there started an error to show up in the LTM log - also the irule seems to it's job anyway. I found an F5 document saying HTTP::uri is not allowed within HTTP_REQUEST.

I have to admit i am not god with this stuff, could someone please help to get that into an other syntax that does not through an error.


rule (simply removes the /80 from the URI):



  HTTP::uri [string map {/80/_vti_bin/Webs.asmx /_vti_bin/Webs.asmx} [HTTP::uri]]





TCL error: /Common/alfresco_acrobat_fix <HTTP_REQUEST> - Can't call after responding - ERR_NOT_SUPPORTED (line 1) invoked from within "HTTP::uri"



Many thanks,


4 Replies

    • Stefan_Klotz's avatar
      Icon for Cumulonimbus rankCumulonimbus

      Dear Daniel,

      thanks for the change in behavior link. I ran into this issue during our update yesterday evening from 13.1.5 to 15.1.8 as well. There were two different iRules in place, which both have a redirect command including a HTTP::uri condition. Connection was reset in the browser as stated in the article and the error count of the second iRule increased.
      I could solve the issue by consolidating both iRules into one and separate its content with if-statements.
      Now I know the reason 😉

      But I don't find any hint in the release notes of version 14.1.0 for this. Or did I look at the wrong place? Just for future updates to avoid any issues due to behavior changes. I mean it makes no sense to check all relevant release notes, if not all behavior changes are included.

      Regards Stefan 🙂

  • Ingo This might work for you.

    when HTTP_REQUEST {
        if {[HTTP::uri] == "/80/_vti_bin/Webs.asmx"} {
            HTTP::uri [string map {"/80/_vti_bin/Webs.asmx" "/_vti_bin/Webs.asmx"} [HTTP::uri]]