# File lib/mongrel/handlers.rb, line 122
    def can_serve(path_info)
      req_path = File.expand_path(File.join(@path,HttpRequest.unescape(path_info)), @path)

      if req_path.index(@path) == 0 and File.exist? req_path
        # it exists and it's in the right location
        if File.directory? req_path
          # the request is for a directory
          index = File.join(req_path, @index_html)
          if File.exist? index
            # serve the index
            return index
          elsif @listing_allowed
            # serve the directory
            return req_path
          else
            # do not serve anything
            return nil
          end
        else
          # it's a file and it's there
          return req_path
        end
      else
        # does not exist or isn't in the right spot
        return nil
      end
    end