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Thiyagu_343098's avatar
Thiyagu_343098
Icon for Nimbostratus rankNimbostratus
Jan 24, 2018

iRULE to remove the URI on LB

Hello All, I'm working on a request to remove the URI from the HTTP request and send the rest of the URL path as it is to the backend server: for example a request as and it should get routed to bac...
application delivery
BIG-IP
iRules
Lee_Sutcliffe's avatar
Lee_Sutcliffe
Icon for Nacreous rankNacreous
Jan 24, 2018

Hi Thiyagu,

You can use this iRule to replace the first field in the URI path, regardless of what the field contains. It uses 

getfield
which uses the forward slashes as delimiters and 
string map
to replace what has been found, with a blank value.

when HTTP_REQUEST {
    if {[HTTP::uri] contains "URI1"} {
        set uriField [getfield [HTTP::uri] / 2]
        set newUri [string map [list ${uriField}/ ""] [HTTP::uri]]
        HTTP::uri $newUri
    }
}

Getfield https://devcentral.f5.com/wiki/irules.getfield.ashx

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