Forum Discussion

Greg_Ryan_33844's avatar
Greg_Ryan_33844
Icon for Nimbostratus rankNimbostratus
Jul 20, 2010

iRule to set a cookie based on url

Hi, this is one of my first iRules and I am completely at a loss. What I am trying to do is set a cookie based on a 'contains' in the url. Once the cookie is set then I want to switch the pool based on the cookie value. I can get the second part to work, what I can't seem to do is to set a cookie based on an if statement. Has anyone done anything like this?

 

 

when HTTP_REQUEST {

 

 

if { [HTTP::uri] contains "newAdmin=1" } {

 

set newadmin_cookie "1"

 

pool 81_pool

 

}

 

elseif { [HTTP::uri] contains "newAdmin=0" } {

 

set newadmin_cookie "0"

 

pool server_pool

 

}

 

if { ([HTTP::cookie value "newadmin"] equals "1") } {

 

pool 81_pool

 

}

 

elseif { ([HTTP::cookie value "newadmin"] equals "0") } {

 

pool server_pool

 

}

 

 

}

 

 

when HTTP_RESPONSE {

 

HTTP::cookie insert name "newadmin" value $newadmin_cookie path "/"

 

}

 

application delivery
dev
devops
iRules

1 Reply

Sort By
  • hooleylist's avatar
    hooleylist
    Icon for Cirrostratus rankCirrostratus
    Jul 20, 2010
    Hi Greg,

    That looks like a very good start. I assume newAdmin is a parameter name in the query string that you want to check the value for? You could use a switch statement to check the parameter value. If that's not set to 0 or 1, you could use another switch statement to check the newadmin cookie value.

    Do you want to do something if there isn't a match on the parameter or cookie values? If so you can put that in the default switch case at the end of the iRule. 

    when HTTP_REQUEST {
    Initialize the newadmin cookie value to something other than 0 or 1
   set newadmin_cookie undefined
   log local0. "[IP::client_addr]:[TCP::client_port]: [HTTP::method] request to [HTTP::host][HTTP::uri]"
    Check the query string for a parameter named newAdmin
    Use a workaround described in http ://devcentral.f5.com/wiki/default.aspx/iRules/uri__query
   switch [URI::query "?&[HTTP::query] &newAdmin] {
      "0" {
          newAdmin parameter set to 0
         set newadmin_cookie "0"
         pool server_pool
         log local0. "[IP::client_addr]:[TCP::client_port]: newAdmin param match for 0, using server_pool"
      }
      "1" {
          newAdmin parameter set to 1
         set newadmin_cookie "1"
         pool 81_pool
         log local0. "[IP::client_addr]:[TCP::client_port]: newAdmin param match for 1, using 81_pool"
      }
      default {
          newAdmin parameter not set to 0 or 1
          Check for a newadmin cookie
         switch [HTTP::cookie value "newadmin"] {
            "0" {
                newAdmin cookie set to 0
               set newadmin_cookie "0"
               pool server_pool
               log local0. "[IP::client_addr]:[TCP::client_port]: newAdmin cookie match for 0, using server_pool"
            }
            "1" {
                newAdmin cookie set to 1
               set newadmin_cookie "1"
               pool 81_pool
               log local0. "[IP::client_addr]:[TCP::client_port]: newAdmin cookie match for 1, using 81_pool"
            }
            default {
                No match for newAdmin parameter or cookie. Take some default action?
               log local0. "[IP::client_addr]:[TCP::client_port]: No match on newAdmin parameter or cookie"
            }
         }
      }
   }
}
when HTTP_RESPONSE {
   HTTP::cookie insert name "newadmin" value $newadmin_cookie path "/"
}

    Aaron