begin_transport

# File lib/net/http.rb, line 1546
    def begin_transport(req)
      if @socket.closed?
        connect
      elsif @last_communicated
        if @last_communicated + @keep_alive_timeout < Process.clock_gettime(Process::CLOCK_MONOTONIC)
          D 'Conn close because of keep_alive_timeout'
          @socket.close
          connect
        elsif @socket.io.to_io.wait_readable(0) && @socket.eof?
          D "Conn close because of EOF"
          @socket.close
          connect
        end
      end

      if not req.response_body_permitted? and @close_on_empty_response
        req['connection'] ||= 'close'
      end

      req.update_uri address, port, use_ssl?
      req['host'] ||= addr_port()
    end