Checking for file from iRule?

Ok, I think this is working as I intend it to work:

 
 when HTTP_REQUEST { 
   set downtimepool "Downtime-NonSSL" 
   set downtimemember "10.21.67.103" 
   set downtimeport "16080" 
   set downtime 0 
   if { ([LB::status pool $downtimepool member $downtimemember $downtimeport] eq "up") and (![IP::addr [IP::client_addr]/16 equals 10.21.0.0]) } { 
     pool $downtimepool 
     log local0. "Sending request to pool $downtimepool" 
     set downtime 1 
   } 
 } 
 when SERVER_CONNECTED { 
   if { $downtime == 1 and [PROFILE::exists serverssl] == 1 } { 
     set disable "SSL::disable serverside" 
     catch {eval $disable} 
     log local0. "Disabled server side SSL" 
   } 
 } 
 

Now I will let the people, who take applications up/down, set the node enable/disable via SOAP/XML and that should allow them to control the direction to another pool. I probably will expand the IP::addr match up there to a class, as we use not only 10.0.0.0/8 inside the company but one office still uses 100.0.0.0/8 (not my call). Plus there might be the need for some real IP addresses used for people sitting at home during our software releases.