Forum Discussion

NorCalAdam_6796's avatar
NorCalAdam_6796
Icon for Nimbostratus rankNimbostratus
Jun 06, 2013

Replace URI (wildcard) with null

Ive been searching around the last couple days and haven't been able to find a good solution to this yet. I tried to accomplish it with sting map so I wouldn't have to use regex but it doesn't seem to support wildcards. I am new to writing an irule in regex and want to see if they community could assist with this rule and had a better idea how to write it.

 

My iRule is as follows:

 

when HTTP_REQUEST {

 

if { [string tolower [HTTP::uri]] contains "\/@v=" } {

 

set uri [HTTP::uri]

 

regsub [\/@v=.*@" $uri "" url2]

 

HTTP::uri $url2

 

}

 

}

 

 

When web requests come in as mydomain.com/foo/@v=-1654270807@/bar/123/foo123/pic.jpg I need to strip out /@v=-0123456789@ so my webserver can handle the request. What I am finding difficult to solve is the number 0123456789 can be any number. Any ideas on how I could accomplish this? I would prefer not to use redirects also.

 

 

 

application delivery
dev
devops
iRules

2 Replies

Sort By
  • Kevin_Stewart's avatar
    Kevin_Stewart
    Icon for Employee rankEmployee
    Jun 06, 2013
    There's a million ways to manipulate strings in TCL/iRules. Here's one example that should meet your requirements. 

    
when HTTP_REQUEST {
    if { [string tolower [HTTP::uri]] contains "/@v=" } {
         extract the dynamic number data from the URI
        set filter [findstr [string tolower [HTTP::uri]] "/@v=" 4 "@"]
         use a string map to remove the number data
        set newuri [string map "/@v=$filter@/ /" [string tolower [HTTP::uri]]]
        HTTP::uri $newuri 
    }
}