redirect subdomain to append to uri

Hi Greg,

You can use the string range, getfield or scan command to parse the subdomain from a host header value:

when HTTP_REQUEST {
    Check for a non-null length host header
   if {[string match {*[a-zA-Z]*} [HTTP::host]]}{

       Use string commands to parse the subdomain
      set subdomain [string range [HTTP::host] 0 [expr {[string first . [HTTP::host]] -1}]]

       Use the getfield command to parse the subdomain
      set subdomain [getfield [HTTP::host] . 1]

       Use scan to parse the subdomain
      scan [HTTP::host] {%[^.]} subdomain
   }
}

I'd guess that getfield is probably the simplest and potentially the most efficient option to do this.

Aaron