# File lib/http-access2/http.rb, line 176
    def dump(dev = '')
      set_header
      if @is_request
        dev << request_line
      else
        dev << response_status_line
      end
      dev << @header_item.collect { |key, value|
          dump_line("#{ key }: #{ value }")
        }.join
      dev
    end