dump (HTTP::Message::Body)

    # File lib/httpclient/http.rb, line 431
          def dump(header = '', dev = '')
            if @body.is_a?(Parts)
              dev << header
              buf = ''
              @body.parts.each do |part|
                if Message.file?(part)
                  reset_pos(part)
                  while !part.read(@chunk_size, buf).nil?
                    dev << buf
                  end
                else
                  dev << part
                end
              end
            elsif @body
              dev << header + @body
            else
              dev << header
            end
            dev
          end