Append http query with the value of a variable set in the iRule

just another example.

root@(ve11a)(cfg-sync Changes Pending)(Active)(/Common)(tmos) list ltm virtual bar
ltm virtual bar {
    destination 172.28.20.111:80
    ip-protocol tcp
    mask 255.255.255.255
    pool foo
    profiles {
        http { }
        tcp { }
    }
    rules {
        myrule
    }
    source 0.0.0.0/0
    source-address-translation {
        type automap
    }
    vs-index 4
}
root@(ve11a)(cfg-sync Changes Pending)(Active)(/Common)(tmos) list ltm rule myrule
ltm rule myrule {
    when RULE_INIT {
  set static::appid "abc123"
}
when HTTP_REQUEST {
  if { [HTTP::query] ne "" } {
    set append_uri "&appid=$static::appid"
  } else {
    set append_uri "?appid=$static::appid"
  }
  HTTP::uri "[HTTP::uri]$append_uri"
}
}

1

[root@ve11a:Active:Changes Pending] config  ssldump -Aed -nni 0.0 port 80
New TCP connection 1: 172.28.20.17(44480) <-> 172.28.20.111(80)
1382149908.6585 (0.0010)  C>S
---------------------------------------------------------------
GET /something HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Host: 172.28.20.111
Accept: */*

---------------------------------------------------------------

New TCP connection 2: 200.200.200.14(44480) <-> 200.200.200.101(80)
1382149908.6606 (0.0020)  C>S
---------------------------------------------------------------
GET /something?appid=abc123 HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Host: 172.28.20.111
Accept: */*

---------------------------------------------------------------

2

[root@ve11a:Active:Changes Pending] config  ssldump -Aed -nni 0.0 port 80
New TCP connection 1: 172.28.20.17(44481) <-> 172.28.20.111(80)
1382149944.4161 (0.0011)  C>S
---------------------------------------------------------------
GET /something?para1=value1 HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Host: 172.28.20.111
Accept: */*

---------------------------------------------------------------

New TCP connection 2: 200.200.200.14(44481) <-> 200.200.200.101(80)
1382149944.4180 (0.0017)  C>S
---------------------------------------------------------------
GET /something?para1=value1&appid=abc123 HTTP/1.1
User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Host: 172.28.20.111
Accept: */*

---------------------------------------------------------------