iRule that redirects to Sorry Pool when pool is down

for maintenance page, i think we should use HTTP_REQUEST event and HTTP::uri command in addition to pool command since we may have to change url when sending to maintenance pool. and i do not think we need to save default pool name in CLIENT_ACCEPTED event.

e.g.

[root@ve10:Active] config  b virtual bar list
virtual bar {
   snat automap
   pool foo
   destination 172.28.19.79:80
   ip protocol 6
   rules myrule
   profiles {
      http {}
      tcp {}
   }
}
[root@ve10:Active] config  b pool foo list
pool foo {
   monitor all fake
   members 200.200.200.101:80 {}
}
[root@ve10:Active] config  b rule myrule list
rule myrule {
   when HTTP_REQUEST {
   if {[active_members [LB::server pool]] < 1} {
      HTTP::uri /
      pool sorrypool
   }
}
}
[root@ve10:Active] config  b pool sorrypool list
pool sorrypool {
   members 200.200.200.102:80 {}
}

 default pool is down

[root@ve10:Active] config  b pool foo|grep -i pool
POOL foo  LB METHOD round robin   MIN/CUR ACTIVE MEMBERS 0/0
+-> POOL MEMBER foo/200.200.200.101:80   inactive,down

 client accesses virtual server and is sent to sorrypool instead

[root@ve10:Active] config  ssldump -Aed -nni 0.0 port 80 and not host 200.200.200.10
New TCP connection 1: 172.28.19.251(44474) <-> 172.28.19.79(80)
1345898352.5804 (0.0009)  C>S
---------------------------------------------------------------
HEAD /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: 172.28.19.79
Accept: */*

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

New TCP connection 2: 200.200.200.80(44474) <-> 200.200.200.102(80)
1345898352.5875 (0.0070)  C>S
---------------------------------------------------------------
HEAD / 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: 172.28.19.79
Accept: */*

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

just my 2 cents.