HTTP rewrite for lots of URLs

As for the case comparison, why don't you just store all your values in lower case in the redir_class and then convert the host and uri to lowercase before calling findclass?

when HTTP_REQUEST {
  log start 
  set lookup [string tolower [HTTP::host][HTTP::uri]]
  log $lookup
  set mapping [findclass  $lookup  $::redir_class " "]
  if { "" ne $mapping } {
    redirect to "$mapping"
    log "[HTTP::host] to $mapping"
  } else {
    set mapping [findclass  [string tolower [HTTP::host]] $::redir_class " "] 
    if { "" ne $mapping } {
      redirect to "$mapping"
      log "[HTTP::host] to $mapping"
    } else {
      log "no hit [HTTP::host]"
      redirect to "http://www.deere.com"
    }
  }
}

As for the "+" character, I just tested it out and didn't find an issue with that character. Have you tried this and had problems, or were you just wondering whether it would work or not.

-Joe