Direct hundreds of clients to 10's of pools by URI

[root@ve10:Active] config  b virtual bar list
virtual bar {
   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 {
   if {[string tolower [HTTP::host]] equals "www.website.com"} {
      scan [HTTP::uri] {/%s} cust
      set pl [class match -value $cust equals redirect_class]
      if {$pl ne ""} {
         HTTP::redirect "http://[string map "www $pl" [string tolower [HTTP::host]]][HTTP::uri]"
      }
   }
}
}
[root@ve10:Active] config  b class redirect_class list
class redirect_class {
   {
      "customer1" { "pool1" }
      "customer2" { "pool13" }
      "customer3" { "pool4" }
   }
}

[root@ve10:Active] config  curl -I http://172.28.19.79/customer1 -H "Host: www.website.com"
HTTP/1.0 302 Found
Location: http://pool1.website.com/customer1
Server: BigIP
Connection: Keep-Alive
Content-Length: 0

[root@ve10:Active] config  curl -I http://172.28.19.79/customer2 -H "Host: www.website.com"
HTTP/1.0 302 Found
Location: http://pool13.website.com/customer2
Server: BigIP
Connection: Keep-Alive
Content-Length: 0

[root@ve10:Active] config  curl -I http://172.28.19.79/customer3 -H "Host: www.website.com"
HTTP/1.0 302 Found
Location: http://pool4.website.com/customer3
Server: BigIP
Connection: Keep-Alive
Content-Length: 0