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Kalyan_Reddy_Da's avatar
Kalyan_Reddy_Da
Icon for Nimbostratus rankNimbostratus
Jul 28, 2010

Help required in Irules for setting the FLAG

Hi Friends,

 

 

Need some help in the below irule. I have a irule whihc will cookie "ABCD" and if present some statements are executed which are CPU consuming and if condition is not met then it will gofor Header "TEST2" and if met it will execute that.

 

 

Out of my 100 requests i get 99 requests to "Header = TEST2" condition. But i need to check the first request in the same order (First Cookie ABCD and next Header TEST2). Once i am TRUE in Second loop Header = TEST2, all my corresponding requests should not go and check for HTTP Cookie ABCD. This is causing a lot of CPU Consumption.

 

 

I cant split the irule due to the architecture issues. Can anyone help in setting the FLAG that if i my request lands in HTTP Header = TEST2 then my next requests for this user login should not execute the HTTP Cookie "ABCD".

 

 

when HTTP_REQUEST {

 

 

if {([HTTP::cookie "TEST"] ne "") } {

 

pool p_pool1

 

}

 

elseif { [HTTP::cookie "ABCD"] contains "app1l" } {

 

if { ([HTTP::uri] starts_with "/apps/admin/") } {

 

 

Execute some statements. whihc are very much CPU consuming.

 

}

 

elseif {[HTTP::header "TEST2"] ne "" } {

 

Execute some statements.

 

pool p_pool2

 

 

 

}

 

}

 

 

}

 

 

 

Anyones help is greatly appreciated

 

application delivery
dev
devops
iRules

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  • Hamish's avatar
    Hamish
    Icon for Cirrocumulus rankCirrocumulus
    Jul 29, 2010

    On a connection basis it's easy... 

    when CLIENT_ACCEPTED {
  set testflag 1
}

when HTTP_REQUEST {

    if {([HTTP::cookie "TEST"] ne "") } {
            pool p_pool1
        } elseif  { $testflag equals 1 } {
          if { [HTTP::cookie "ABCD"] contains "app1l" } {
              if { ([HTTP::uri] starts_with "/apps/admin/") } {    

                Execute some statements. whihc are very much CPU consuming.
              }  elseif {[HTTP::header "TEST2"] ne "" } {
                Execute some statements.
                pool p_pool2            

                set testflag 0
                        
              }
            }
        }
        
}

    However if you want this by USER instead, then instead of using a hard-coded variable per connection (testflag), write the testflag to a session cookie and pull the value (Or if you have a cookie with the username in it, you could keep a table of users and their flags, but that assumes each user will only ever get the processing done once for all their parallel logins... That may be what you want, or not).

    YMMV...