Пример #1
0
Файл: tcp.go Проект: newsky/nsq
func (p *tcpServer) Handle(clientConn net.Conn) {
	log.Printf("TCP: new client(%s)", clientConn.RemoteAddr())

	// The client should initialize itself by sending a 4 byte sequence indicating
	// the version of the protocol that it intends to communicate, this will allow us
	// to gracefully upgrade the protocol away from text/line oriented to whatever...
	buf := make([]byte, 4)
	_, err := io.ReadFull(clientConn, buf)
	if err != nil {
		log.Printf("ERROR: failed to read protocol version - %s", err.Error())
		return
	}
	protocolMagic := string(buf)

	log.Printf("CLIENT(%s): desired protocol magic '%s'", clientConn.RemoteAddr(), protocolMagic)

	var prot nsq.Protocol
	switch protocolMagic {
	case "  V2":
		prot = &ProtocolV2{context: p.context}
	default:
		nsq.SendFramedResponse(clientConn, nsq.FrameTypeError, []byte("E_BAD_PROTOCOL"))
		clientConn.Close()
		log.Printf("ERROR: client(%s) bad protocol magic '%s'", clientConn.RemoteAddr(), protocolMagic)
		return
	}

	err = prot.IOLoop(clientConn)
	if err != nil {
		log.Printf("ERROR: client(%s) - %s", clientConn.RemoteAddr(), err.Error())
		return
	}
}
Пример #2
0
func (p *ProtocolV2) Send(client *ClientV2, frameType int32, data []byte) error {
	client.Lock()
	defer client.Unlock()

	client.SetWriteDeadline(time.Now().Add(time.Second))
	_, err := nsq.SendFramedResponse(client.Writer, frameType, data)
	if err != nil {
		return err
	}

	if frameType != nsq.FrameTypeMessage {
		err = client.Writer.Flush()
	}

	return err
}