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Curious1's avatar
Curious1
Icon for Cirrus rankCirrus
Nov 29, 2019

URI Rewrite remove info

How can I remove info from the below URI? Other objects will be called after the numbers so cant just rewrite URI to "/"

 

hxxp://abc.com/1.2.3.4 : remove any IP address after the /

application delivery
info
iRules
LTM
remove
rewrite
uri
  • Enes_Afsin_Al's avatar
    Enes_Afsin_Al
    Jan 07, 2020

    Hi Curious,

    Can you try this iRule?

    when HTTP_REQUEST {
    if { [string match {/[0-9]*\.[0-9]*\.[0-9]*\.[0-9]*} [HTTP::uri]] } {
        # log local0. "matchedUri: [HTTP::uri]"
        
        set changedUri [string trimleft [HTTP::uri] "/"]
        # log local0. "changedUri: $changedUri"
        
        if { $changedUri contains "/"} {
            set newUri "[string range $changedUri [string first / $changedUri] end]"
        } else {
            set newUri "/"
        }
        # log local0. "newUri: $newUri"
        
        HTTP::redirect "http://[HTTP::host]$newUri"
    }
}

    You can change regex with better expression. I couldn't find exact expression for the IP match.

  • Enes_Afsin_Al's avatar
    Enes_Afsin_Al
    Icon for MVP rankMVP
    Jan 07, 2020

    Hi Curious,

    Can you try this iRule?

    when HTTP_REQUEST {
    if { [string match {/[0-9]*\.[0-9]*\.[0-9]*\.[0-9]*} [HTTP::uri]] } {
        # log local0. "matchedUri: [HTTP::uri]"
        
        set changedUri [string trimleft [HTTP::uri] "/"]
        # log local0. "changedUri: $changedUri"
        
        if { $changedUri contains "/"} {
            set newUri "[string range $changedUri [string first / $changedUri] end]"
        } else {
            set newUri "/"
        }
        # log local0. "newUri: $newUri"
        
        HTTP::redirect "http://[HTTP::host]$newUri"
    }
}

    You can change regex with better expression. I couldn't find exact expression for the IP match.

  • boneyard's avatar
    boneyard
    Icon for MVP rankMVP
    Nov 30, 2019

    use a string replace function, you can find many answers

     

    https://devcentral.f5.com/s/question/0D51T00006i7k6Z/irule-replace-a-part-of-uri

     

    https://devcentral.f5.com/s/articles/irules-101-14-tcl-string-commands-part-2

    • jaikumar_f5's avatar
      jaikumar_f5
      Icon for MVP rankMVP
      Nov 30, 2019

      string tcl can look for exact strings, it doesn't act as a regex. The Op is asking for any IP address, not a particular IP address. Would this be still possible ?

      • boneyard's avatar
        boneyard
        Icon for MVP rankMVP
        Nov 30, 2019

        if you first get the ip address, split on / perhaps you can string replace against that i guess.

         

        also with a other string tricks you can make this work. for example look for first slash, remove (trim) upto that.

         

        and of course you could use regexp as you point out, although the performance impact of that is higher.