Golang protocol.NewFatalClientErr函数代码示例

func (p *protocolV2) FIN(client *clientV2, params [][]byte) ([]byte, error) {
	state := atomic.LoadInt32(&client.State)
	if state != stateSubscribed && state != stateClosing {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", "cannot FIN in current state")
	}

	if len(params) < 2 {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", "FIN insufficient number of params")
	}

	id, err := getMessageID(params[1])
	if err != nil {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", err.Error())
	}

	err = client.Channel.FinishMessage(client.ID, *id)
	if err != nil {
		return nil, protocol.NewClientErr(err, "E_FIN_FAILED",
			fmt.Sprintf("FIN %s failed %s", *id, err.Error()))
	}

	client.FinishedMessage()

	return nil, nil
}

func (p *protocolV2) TOUCH(client *clientV2, params [][]byte) ([]byte, error) {
	state := atomic.LoadInt32(&client.State)
	if state != stateSubscribed && state != stateClosing {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", "cannot TOUCH in current state")
	}

	if len(params) < 2 {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", "TOUCH insufficient number of params")
	}

	id, err := getMessageID(params[1])
	if err != nil {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", err.Error())
	}

	client.RLock()
	msgTimeout := client.MsgTimeout
	client.RUnlock()
	err = client.Channel.TouchMessage(client.ID, *id, msgTimeout)
	if err != nil {
		return nil, protocol.NewClientErr(err, "E_TOUCH_FAILED",
			fmt.Sprintf("TOUCH %s failed %s", *id, err.Error()))
	}

	return nil, nil
}

func enforceTLSPolicy(client *clientV2, p *protocolV2, command []byte) error {
	if p.ctx.nsqd.getOpts().TLSRequired != TLSNotRequired && atomic.LoadInt32(&client.TLS) != 1 {
		return protocol.NewFatalClientErr(nil, "E_INVALID",
			fmt.Sprintf("cannot %s in current state (TLS required)", command))
	}
	return nil
}

func (p *LookupProtocolV1) REGISTER(client *ClientV1, reader *bufio.Reader, params []string) ([]byte, error) {
	if client.peerInfo == nil {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", "client must IDENTIFY")
	}

	topic, channel, err := getTopicChan("REGISTER", params)
	if err != nil {
		return nil, err
	}

	if channel != "" {
		key := Registration{"channel", topic, channel}
		if p.ctx.nsqlookupd.DB.AddProducer(key, &Producer{peerInfo: client.peerInfo}) {
			p.ctx.nsqlookupd.logf("DB: client(%s) REGISTER category:%s key:%s subkey:%s",
				client, "channel", topic, channel)
		}
	}
	key := Registration{"topic", topic, ""}
	if p.ctx.nsqlookupd.DB.AddProducer(key, &Producer{peerInfo: client.peerInfo}) {
		p.ctx.nsqlookupd.logf("DB: client(%s) REGISTER category:%s key:%s subkey:%s",
			client, "topic", topic, "")
	}

	return []byte("OK"), nil
}

func (p *protocolV2) Exec(client *clientV2, params [][]byte) ([]byte, error) {
	if bytes.Equal(params[0], []byte("IDENTIFY")) {
		return p.IDENTIFY(client, params)
	}
	err := enforceTLSPolicy(client, p, params[0])
	if err != nil {
		return nil, err
	}
	switch {
	case bytes.Equal(params[0], []byte("FIN")):
		return p.FIN(client, params)
	case bytes.Equal(params[0], []byte("RDY")):
		return p.RDY(client, params)
	case bytes.Equal(params[0], []byte("REQ")):
		return p.REQ(client, params)
	case bytes.Equal(params[0], []byte("PUB")):
		return p.PUB(client, params)
	case bytes.Equal(params[0], []byte("MPUB")):
		return p.MPUB(client, params)
	case bytes.Equal(params[0], []byte("DPUB")):
		return p.DPUB(client, params)
	case bytes.Equal(params[0], []byte("NOP")):
		return p.NOP(client, params)
	case bytes.Equal(params[0], []byte("TOUCH")):
		return p.TOUCH(client, params)
	case bytes.Equal(params[0], []byte("SUB")):
		return p.SUB(client, params)
	case bytes.Equal(params[0], []byte("CLS")):
		return p.CLS(client, params)
	case bytes.Equal(params[0], []byte("AUTH")):
		return p.AUTH(client, params)
	}
	return nil, protocol.NewFatalClientErr(nil, "E_INVALID", fmt.Sprintf("invalid command %s", params[0]))
}

func (p *protocolV2) CLS(client *clientV2, params [][]byte) ([]byte, error) {
	if atomic.LoadInt32(&client.State) != stateSubscribed {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", "cannot CLS in current state")
	}

	client.StartClose()

	return []byte("CLOSE_WAIT"), nil
}

func (p *protocolV2) CheckAuth(client *clientV2, cmd, topicName, channelName string) error {
	// if auth is enabled, the client must have authorized already
	// compare topic/channel against cached authorization data (refetching if expired)
	if client.ctx.nsqd.IsAuthEnabled() {
		if !client.HasAuthorizations() {
			return protocol.NewFatalClientErr(nil, "E_AUTH_FIRST",
				fmt.Sprintf("AUTH required before %s", cmd))
		}
		ok, err := client.IsAuthorized(topicName, channelName)
		if err != nil {
			// we don't want to leak errors contacting the auth server to untrusted clients
			p.ctx.nsqd.logf("PROTOCOL(V2): [%s] Auth Failed %s", client, err)
			return protocol.NewFatalClientErr(nil, "E_AUTH_FAILED", "AUTH failed")
		}
		if !ok {
			return protocol.NewFatalClientErr(nil, "E_UNAUTHORIZED",
				fmt.Sprintf("AUTH failed for %s on %q %q", cmd, topicName, channelName))
		}
	}
	return nil
}

func getTopicChan(command string, params []string) (string, string, error) {
	if len(params) == 0 {
		return "", "", protocol.NewFatalClientErr(nil, "E_INVALID", fmt.Sprintf("%s insufficient number of params", command))
	}

	topicName := params[0]
	var channelName string
	if len(params) >= 2 {
		channelName = params[1]
	}

	if !protocol.IsValidTopicName(topicName) {
		return "", "", protocol.NewFatalClientErr(nil, "E_BAD_TOPIC", fmt.Sprintf("%s topic name '%s' is not valid", command, topicName))
	}

	if channelName != "" && !protocol.IsValidChannelName(channelName) {
		return "", "", protocol.NewFatalClientErr(nil, "E_BAD_CHANNEL", fmt.Sprintf("%s channel name '%s' is not valid", command, channelName))
	}

	return topicName, channelName, nil
}

func (p *protocolV2) SUB(client *clientV2, params [][]byte) ([]byte, error) {
	if atomic.LoadInt32(&client.State) != stateInit {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", "cannot SUB in current state")
	}

	if client.HeartbeatInterval <= 0 {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", "cannot SUB with heartbeats disabled")
	}

	if len(params) < 3 {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", "SUB insufficient number of parameters")
	}

	topicName := string(params[1])
	if !protocol.IsValidTopicName(topicName) {
		return nil, protocol.NewFatalClientErr(nil, "E_BAD_TOPIC",
			fmt.Sprintf("SUB topic name %q is not valid", topicName))
	}

	channelName := string(params[2])
	if !protocol.IsValidChannelName(channelName) {
		return nil, protocol.NewFatalClientErr(nil, "E_BAD_CHANNEL",
			fmt.Sprintf("SUB channel name %q is not valid", channelName))
	}

	if err := p.CheckAuth(client, "SUB", topicName, channelName); err != nil {
		return nil, err
	}

	topic := p.ctx.nsqd.GetTopic(topicName)
	channel := topic.GetChannel(channelName)
	channel.AddClient(client.ID, client)

	atomic.StoreInt32(&client.State, stateSubscribed)
	client.Channel = channel
	// update message pump
	client.SubEventChan <- channel

	return okBytes, nil
}

func (p *LookupProtocolV1) Exec(client *ClientV1, reader *bufio.Reader, params []string) ([]byte, error) {
	switch params[0] {
	case "PING":
		return p.PING(client, params)
	case "IDENTIFY":
		return p.IDENTIFY(client, reader, params[1:])
	case "REGISTER":
		return p.REGISTER(client, reader, params[1:])
	case "UNREGISTER":
		return p.UNREGISTER(client, reader, params[1:])
	}
	return nil, protocol.NewFatalClientErr(nil, "E_INVALID", fmt.Sprintf("invalid command %s", params[0]))
}

func (p *protocolV2) REQ(client *clientV2, params [][]byte) ([]byte, error) {
	state := atomic.LoadInt32(&client.State)
	if state != stateSubscribed && state != stateClosing {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", "cannot REQ in current state")
	}

	if len(params) < 3 {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", "REQ insufficient number of params")
	}

	id, err := getMessageID(params[1])
	if err != nil {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", err.Error())
	}

	timeoutMs, err := protocol.ByteToBase10(params[2])
	if err != nil {
		return nil, protocol.NewFatalClientErr(err, "E_INVALID",
			fmt.Sprintf("REQ could not parse timeout %s", params[2]))
	}
	timeoutDuration := time.Duration(timeoutMs) * time.Millisecond

	if timeoutDuration < 0 || timeoutDuration > p.ctx.nsqd.getOpts().MaxReqTimeout {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID",
			fmt.Sprintf("REQ timeout %d out of range 0-%d", timeoutDuration, p.ctx.nsqd.getOpts().MaxReqTimeout))
	}

	err = client.Channel.RequeueMessage(client.ID, *id, timeoutDuration)
	if err != nil {
		return nil, protocol.NewClientErr(err, "E_REQ_FAILED",
			fmt.Sprintf("REQ %s failed %s", *id, err.Error()))
	}

	client.RequeuedMessage()

	return nil, nil
}

func (p *protocolV2) RDY(client *clientV2, params [][]byte) ([]byte, error) {
	state := atomic.LoadInt32(&client.State)

	if state == stateClosing {
		// just ignore ready changes on a closing channel
		p.ctx.nsqd.logf(
			"PROTOCOL(V2): [%s] ignoring RDY after CLS in state ClientStateV2Closing",
			client)
		return nil, nil
	}

	if state != stateSubscribed {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", "cannot RDY in current state")
	}

	count := int64(1)
	if len(params) > 1 {
		b10, err := protocol.ByteToBase10(params[1])
		if err != nil {
			return nil, protocol.NewFatalClientErr(err, "E_INVALID",
				fmt.Sprintf("RDY could not parse count %s", params[1]))
		}
		count = int64(b10)
	}

	if count < 0 || count > p.ctx.nsqd.getOpts().MaxRdyCount {
		// this needs to be a fatal error otherwise clients would have
		// inconsistent state
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID",
			fmt.Sprintf("RDY count %d out of range 0-%d", count, p.ctx.nsqd.getOpts().MaxRdyCount))
	}

	client.SetReadyCount(count)

	return nil, nil
}

func (p *protocolV2) PUB(client *clientV2, params [][]byte) ([]byte, error) {
	var err error

	if len(params) < 2 {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", "PUB insufficient number of parameters")
	}

	topicName := string(params[1])
	if !protocol.IsValidTopicName(topicName) {
		return nil, protocol.NewFatalClientErr(nil, "E_BAD_TOPIC",
			fmt.Sprintf("PUB topic name %q is not valid", topicName))
	}

	bodyLen, err := readLen(client.Reader, client.lenSlice)
	if err != nil {
		return nil, protocol.NewFatalClientErr(err, "E_BAD_MESSAGE", "PUB failed to read message body size")
	}

	if bodyLen <= 0 {
		return nil, protocol.NewFatalClientErr(nil, "E_BAD_MESSAGE",
			fmt.Sprintf("PUB invalid message body size %d", bodyLen))
	}

	if int64(bodyLen) > p.ctx.nsqd.getOpts().MaxMsgSize {
		return nil, protocol.NewFatalClientErr(nil, "E_BAD_MESSAGE",
			fmt.Sprintf("PUB message too big %d > %d", bodyLen, p.ctx.nsqd.getOpts().MaxMsgSize))
	}

	messageBody := make([]byte, bodyLen)
	_, err = io.ReadFull(client.Reader, messageBody)
	if err != nil {
		return nil, protocol.NewFatalClientErr(err, "E_BAD_MESSAGE", "PUB failed to read message body")
	}

	if err := p.CheckAuth(client, "PUB", topicName, ""); err != nil {
		return nil, err
	}

	topic := p.ctx.nsqd.GetTopic(topicName)
	msg := NewMessage(<-p.ctx.nsqd.idChan, messageBody)
	err = topic.PutMessage(msg)
	if err != nil {
		return nil, protocol.NewFatalClientErr(err, "E_PUB_FAILED", "PUB failed "+err.Error())
	}

	return okBytes, nil
}

func (p *LookupProtocolV1) UNREGISTER(client *ClientV1, reader *bufio.Reader, params []string) ([]byte, error) {
	if client.peerInfo == nil {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", "client must IDENTIFY")
	}

	topic, channel, err := getTopicChan("UNREGISTER", params)
	if err != nil {
		return nil, err
	}

	if channel != "" {
		key := Registration{"channel", topic, channel}
		removed, left := p.ctx.nsqlookupd.DB.RemoveProducer(key, client.peerInfo.id)
		if removed {
			p.ctx.nsqlookupd.logf("DB: client(%s) UNREGISTER category:%s key:%s subkey:%s",
				client, "channel", topic, channel)
		}
		// for ephemeral channels, remove the channel as well if it has no producers
		if left == 0 && strings.HasSuffix(channel, "#ephemeral") {
			p.ctx.nsqlookupd.DB.RemoveRegistration(key)
		}
	} else {
		// no channel was specified so this is a topic unregistration
		// remove all of the channel registrations...
		// normally this shouldn't happen which is why we print a warning message
		// if anything is actually removed
		registrations := p.ctx.nsqlookupd.DB.FindRegistrations("channel", topic, "*")
		for _, r := range registrations {
			if removed, _ := p.ctx.nsqlookupd.DB.RemoveProducer(r, client.peerInfo.id); removed {
				p.ctx.nsqlookupd.logf("WARNING: client(%s) unexpected UNREGISTER category:%s key:%s subkey:%s",
					client, "channel", topic, r.SubKey)
			}
		}

		key := Registration{"topic", topic, ""}
		if removed, _ := p.ctx.nsqlookupd.DB.RemoveProducer(key, client.peerInfo.id); removed {
			p.ctx.nsqlookupd.logf("DB: client(%s) UNREGISTER category:%s key:%s subkey:%s",
				client, "topic", topic, "")
		}
	}

	return []byte("OK"), nil
}

func (p *protocolV2) MPUB(client *clientV2, params [][]byte) ([]byte, error) {
	var err error

	if len(params) < 2 {
		return nil, protocol.NewFatalClientErr(nil, "E_INVALID", "MPUB insufficient number of parameters")
	}

	topicName := string(params[1])
	if !protocol.IsValidTopicName(topicName) {
		return nil, protocol.NewFatalClientErr(nil, "E_BAD_TOPIC",
			fmt.Sprintf("E_BAD_TOPIC MPUB topic name %q is not valid", topicName))
	}

	bodyLen, err := readLen(client.Reader, client.lenSlice)
	if err != nil {
		return nil, protocol.NewFatalClientErr(err, "E_BAD_BODY", "MPUB failed to read body size")
	}

	if bodyLen <= 0 {
		return nil, protocol.NewFatalClientErr(nil, "E_BAD_BODY",
			fmt.Sprintf("MPUB invalid body size %d", bodyLen))
	}

	if int64(bodyLen) > p.ctx.nsqd.getOpts().MaxBodySize {
		return nil, protocol.NewFatalClientErr(nil, "E_BAD_BODY",
			fmt.Sprintf("MPUB body too big %d > %d", bodyLen, p.ctx.nsqd.getOpts().MaxBodySize))
	}

	messages, err := readMPUB(client.Reader, client.lenSlice, p.ctx.nsqd.idChan,
		p.ctx.nsqd.getOpts().MaxMsgSize)
	if err != nil {
		return nil, err
	}

	if err := p.CheckAuth(client, "MPUB", topicName, ""); err != nil {
		return nil, err
	}

	topic := p.ctx.nsqd.GetTopic(topicName)

	// if we've made it this far we've validated all the input,
	// the only possible error is that the topic is exiting during
	// this next call (and no messages will be queued in that case)
	err = topic.PutMessages(messages)
	if err != nil {
		return nil, protocol.NewFatalClientErr(err, "E_MPUB_FAILED", "MPUB failed "+err.Error())
	}

	return okBytes, nil
}