iRule Redirect Mobile Site

[root@ve10:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.19.252:443
   ip protocol 6
   rules myrule
   profiles {
      clientssl {
         clientside
      }
      http {}
      tcp {}
   }
}
[root@ve10:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
   if { [HTTP::host] equals "home.example.co.in" } {
      if { [URI::query "?&[HTTP::query]" main] equals "true" } {
         return
      }

      if { [string tolower [HTTP::header "User-Agent"]] contains "iphone" } {
         HTTP::redirect "https://lite.example.co.in"
      }

   } elseif { [URI::query "?&[HTTP::query]" main] equals "true" } {
      HTTP::redirect "https://home.example.co.in?main=true"
   }
}
}

[root@ve10:Active] config  curl -Ik https://home.example.co.in/something -H "User-Agent: iphone5"
HTTP/1.0 302 Found
Location: https://lite.example.co.in
Server: BigIP
Connection: Keep-Alive
Content-Length: 0

[root@ve10:Active] config  curl -Ik https://lite.example.co.in/something?main=true -H "User-Agent: iphone5"
HTTP/1.0 302 Found
Location: https://home.example.co.in?main=true
Server: BigIP
Connection: Keep-Alive
Content-Length: 0

[root@ve10:Active] config  curl -Ik https://home.example.co.in?main=true -H "User-Agent: iphone5"
HTTP/1.1 200 OK
Date: Wed, 06 Mar 2013 11:27:51 GMT
Server: Apache/2.2.3 (CentOS)
Last-Modified: Sat, 27 Oct 2012 03:22:35 GMT
ETag: "4183f3-59-f28f94c0"
Accept-Ranges: bytes
Content-Length: 89
Content-Type: text/html; charset=UTF-8