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Forum Discussion

Hille_de_Graaf_'s avatar
Hille_de_Graaf_
Icon for Nimbostratus rankNimbostratus
Mar 25, 2008

Simplify iRule

I have an iRule which would look at the content of the HTTP-header and loadbalance on behalve of that content.   Is there a more efficient way to build an iRule with the same results as the example...
application delivery
dev
devops
iRules
The_Bhattman's avatar
The_Bhattman
Icon for Nimbostratus rankNimbostratus
Mar 25, 2008
There are 2 ways I can see this work.

1) Using SWITCH

You can use the switch statement


when HTTP_REQUEST {
  switch [HTTP::uri] {
  "ACCBPMv1" {pool xml-fw }
  "ACCTVIv1" { pool xml-fw }
  "ACCTDSv1" { pool xml-fw }
  "BPMv1" { pool xml-fw }
  "TVIv1" { pool xml-fw }
  "DVSv1" { pool xml-fw }
  }
}

or


when HTTP_REQUEST {
 switch -glob [HTTP::uri] {
  "ACC*" {pool xml-fw }
  "BPMv1" { pool xml-fw }
  "TVIv1" { pool xml-fw }
  "DVSv1" { pool xml-fw }
 }
}

or


when HTTP_REQUEST {
 switch -glob [HTTP::uri] {
  "*v1" {pool xml-fw }
  }
}

You would then set the virtual server to the default pool to ws-accxml for any of the switch irules listed above.

2) Using Datagroup the solution looks a bit cleaner.


class uricontains {
"ACCBPMv2"
"ACCBPMv1"
"ACCTVIv1" 
"ACCTDSv1"
"BPMv1"
"TVIv1"
"DVSv1"
}
when HTTP_REQUEST {
   if { [matchclass [HTTP::uri] contains $::uricontains] } { 
      pool xml-fw 
    } else {pool xml-accxml }
}

Hope this helps

/CB