Node selection via URL parameters

[root@ve10:Active] config  b virtual bar list
virtual bar {
   snat automap
   destination 172.28.19.79:80
   ip protocol 6
   rules myrule
   profiles {
      http {}
      tcp {}
   }
}
[root@ve10:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
   set node_ip [URI::query "?&[HTTP::query]" "node"]
   if { [scan $node_ip {%d.%d.%d.%d} a b c d] == 4 } {
      HTTP::uri [string trimright [string map [list "node=$node_ip" ""] [HTTP::uri]] "?"]
      node $a.$b.$c.$d
   }
}
}

 test1

[root@ve10:Active] config  ssldump -Aed -nni 0.0 port 80
New TCP connection 1: 172.28.20.11(58985) <-> 172.28.19.79(80)
1350967002.5006 (0.0007)  C>S
---------------------------------------------------------------
HEAD /login.jsp?node=200.200.200.101 HTTP/1.1
User-Agent: curl/7.15.5 (x86_64-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Host: 172.28.19.79
Accept: */*

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

New TCP connection 2: 200.200.200.10(58985) <-> 200.200.200.101(80)
1350967002.5018 (0.0010)  C>S
---------------------------------------------------------------
HEAD /login.jsp HTTP/1.1
User-Agent: curl/7.15.5 (x86_64-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Host: 172.28.19.79
Accept: */*

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

 test2

[root@ve10:Active] config  ssldump -Aed -nni 0.0 port 80
New TCP connection 1: 172.28.20.11(58986) <-> 172.28.19.79(80)
1350967020.3477 (0.0010)  C>S
---------------------------------------------------------------
HEAD /login.jsp?node=200.200.200.111 HTTP/1.1
User-Agent: curl/7.15.5 (x86_64-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Host: 172.28.19.79
Accept: */*

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

New TCP connection 2: 200.200.200.10(58986) <-> 200.200.200.111(80)
1350967020.3489 (0.0010)  C>S
---------------------------------------------------------------
HEAD /login.jsp HTTP/1.1
User-Agent: curl/7.15.5 (x86_64-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
Host: 172.28.19.79
Accept: */*

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