iRule for handling traffic to multiple pools through the same VS

We use an iRule and a datagroup to route different host/[path] to pools in the same iRule. Here's some example code:

set log(search) $host[string tolower [HTTP::uri]]
set pool [class match -value $log(search) starts_with dg_shared.example.com]
if { $pool ne ""} {
    set matched [class match -name $log(search) starts_with dg_shared.example.com]
    set log(matched) $matched
    set log(pool) $pool
    if { $pool starts_with "http" } {
        # datagroup entry is realy a redirect
        set log(reason) "redirect"
        call hsllog log
        HTTP::respond 307 Connection Close Location $pool Virtual-Name [virtual name]
        TCP::close
        event disable
        return
    } elseif { [catch { pool $pool } ] } {
        set log(reason) "Failed to Connect to Pool"
        call hsllog log
        call errorpage 404 $log(reason) "https://[HTTP::host][HTTP::uri]" log
    }
} else {
    call errorpage 404 "No Pool Found" "https://[HTTP::host][HTTP::uri]" log
}

this uses starts_with so datagroup entries would look like:

test.example.com/ := https://test.example.com/tool-two
test.example.com/tool-one := pool_one
test.example.com/tool-two := pool_two