Redirect HTTPS traffic based on URI without HTTP profile

This is current problem, I have a Citrix Access gateway. This server runs a web server but also tunnels the ICA traffic in HTTPS. If a HTTP profile is enabled this breaks. I want to direct traffic to a different pool that runs standard IIS web servers based on URI. The VIP is SSL. The citrix pool has a client SSL profile and the IIS pool has HTTP. Attached is the iRule I wrote and it seems to work. I'm worried that it makes the choice based on the HTTPS_Handshake; Can I depend on this happening anytime someone changes the URI?

   
  when CLIENT_ACCEPTED {  
  HTTP::disable  
  }  
    
  when CLIENTSSL_HANDSHAKE {  
  SSL::collect 4  
  HTTP::disable  
  }  
    
  when CLIENTSSL_DATA {  
     if { ([SSL::payload 4] equals  "GET " )} {  
      HTTP::enable  
      }  
  disable HTTP profile if it does not look like HTTP (Read: ICA traffic)  
  else {  
  HTTP::disable  
   }  
  }  
    
  when HTTP_REQUEST {   
  LB::detach  
  if { [string tolower [HTTP::path]] starts_with  "/IISWebsite" } {  
  LB::detach  
  serverside { SSL::disable  }  
  pool IIS_Pool  
  }  
  else {  
  pool Citrix_Pool  
  }  
  }