Exemplo n.º 1
0
func (p *tcpServer) Handle(clientConn net.Conn) {
	// 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...
	clientConn.SetReadDeadline(time.Now().Add(p.ctx.getOpts().ClientTimeout))
	buf := make([]byte, 4)
	_, err := io.ReadFull(clientConn, buf)
	if err != nil {
		nsqd.NsqLogger().Logf(" failed to read protocol version - %s from client: %v", err, clientConn.RemoteAddr())
		clientConn.Close()
		return
	}
	protocolMagic := string(buf)

	if nsqd.NsqLogger().Level() >= levellogger.LOG_DEBUG {
		nsqd.NsqLogger().LogDebugf("new CLIENT(%s): desired protocol magic '%s'",
			clientConn.RemoteAddr(), protocolMagic)
	}

	var prot protocol.Protocol
	switch protocolMagic {
	case "  V2":
		prot = &protocolV2{ctx: p.ctx}
	default:
		protocol.SendFramedResponse(clientConn, frameTypeError, []byte("E_BAD_PROTOCOL"))
		clientConn.Close()
		nsqd.NsqLogger().LogErrorf("client(%s) bad protocol magic '%s'",
			clientConn.RemoteAddr(), protocolMagic)
		return
	}

	err = prot.IOLoop(clientConn)
	if err != nil {
		nsqd.NsqLogger().Logf("client(%s) error - %s", clientConn.RemoteAddr(), err)
		return
	}
}
Exemplo n.º 2
0
func internalSend(client *nsqd.ClientV2, frameType int32, data []byte, needFlush bool) error {
	client.LockWrite()
	defer client.UnlockWrite()
	if client.Writer == nil {
		return errors.New("client closed")
	}

	var zeroTime time.Time
	if client.HeartbeatInterval > 0 {
		client.SetWriteDeadline(time.Now().Add(client.HeartbeatInterval))
	} else {
		client.SetWriteDeadline(zeroTime)
	}

	_, err := protocol.SendFramedResponse(client.Writer, frameType, data)
	if err != nil {
		return err
	}

	if needFlush || frameType != frameTypeMessage {
		err = client.Flush()
	}
	return err
}