Forum Discussion

Esa_Kuusisto_27's avatar
Esa_Kuusisto_27
Icon for Nimbostratus rankNimbostratus
Nov 21, 2007

Best way to get one part of the url to variable

Hi all

 

 

I have problem getting one part of the url to variable. I need example test variable and contents of the variable I can get from url. I always need the first part from the url between slashes.

 

 

Example /sales/office

 

I need to get that sales. I did try using string range, but I didn't find any way else to limit how much get from url than giving end-command or index number. If I replace sales with marketing or something else longer or shorter I cannot use static index number.

 

 

-Esa
application delivery
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iRules
  • hoolio's avatar
    hoolio
    Icon for Cirrostratus rankCirrostratus
    Nov 23, 2007
    If you want to just replace one string in the URI with another, you could use string map (Click here😞

    
when HTTP_REQUEST {
   HTTP::uri [string map {find replace} [HTTP::uri]
}

    A string command would be more efficient than a regex based one.

    Aaron
  • Joe_Pruitt's avatar
    Joe_Pruitt
    Nov 26, 2007
    Regexps are bad if you absolutely don't need them. They are very resource intensive and in most cases, there are better alternatives. If you want to extract a field from a string separated by delimiters, you can use the iRule getfield command.

    http://devcentral.f5.com/wiki/default.aspx/iRules/getfield.html

    Click here

    For your example URI of "/sales/office" The following commmand would extract the field "sales".

    set val [getfield [HTTP::uri] "/" 2]

    This command extracts the specified field from the URI which is delimited by slashes "/". The first field would be the value before the first delimeter. In the case of a URI, it will always be an empty string. The second delimiter would be the value "sales", the third "office" and so on...

    Hope this helps...

    -Joe