func (p *ProtocolV2) REQ(client *ClientV2, params [][]byte) ([]byte, error) {
state := atomic.LoadInt32(&client.State)
if state != nsq.StateSubscribed && state != nsq.StateClosing {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "cannot REQ in current state")
}
if len(params) < 3 {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "REQ insufficient number of params")
}
id := *(*nsq.MessageID)(unsafe.Pointer(¶ms[1][0]))
timeoutMs, err := util.ByteToBase10(params[2])
if err != nil {
return nil, util.NewFatalClientErr(err, "E_INVALID",
fmt.Sprintf("REQ could not parse timeout %s", params[2]))
}
timeoutDuration := time.Duration(timeoutMs) * time.Millisecond
if timeoutDuration < 0 || timeoutDuration > maxTimeout {
return nil, util.NewFatalClientErr(nil, "E_INVALID",
fmt.Sprintf("REQ timeout %d out of range 0-%d", timeoutDuration, maxTimeout))
}
err = client.Channel.RequeueMessage(client.ID, id, timeoutDuration)
if err != nil {
return nil, util.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 == nsq.StateClosing {
// just ignore ready changes on a closing channel
log.Printf("PROTOCOL(V2): [%s] ignoring RDY after CLS in state ClientStateV2Closing", client)
return nil, nil
}
if state != nsq.StateSubscribed {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "cannot RDY in current state")
}
count := int64(1)
if len(params) > 1 {
b10, err := util.ByteToBase10(params[1])
if err != nil {
return nil, util.NewFatalClientErr(err, "E_INVALID",
fmt.Sprintf("RDY could not parse count %s", params[1]))
}
count = int64(b10)
}
if count < 0 || count > p.context.nsqd.options.maxRdyCount {
// this needs to be a fatal error otherwise clients would have
// inconsistent state
return nil, util.NewFatalClientErr(nil, "E_INVALID",
fmt.Sprintf("RDY count %d out of range 0-%d", count, p.context.nsqd.options.maxRdyCount))
}
client.SetReadyCount(count)
return nil, nil
}
func (p *ProtocolV2) Exec(client *ClientV2, params [][]byte) ([]byte, error) {
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("NOP")):
return p.NOP(client, params)
case bytes.Equal(params[0], []byte("TOUCH")):
return p.TOUCH(client, params)
case bytes.Equal(params[0], []byte("IDENTIFY")):
return p.IDENTIFY(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)
}
return nil, util.NewFatalClientErr(nil, "E_INVALID", fmt.Sprintf("invalid command %s", params[0]))
}
func (p *LookupProtocolV1) REGISTER(client *ClientV1, reader *bufio.Reader, params []string) ([]byte, error) {
if client.peerInfo == nil {
return nil, util.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.context.nsqlookupd.DB.AddProducer(key, &Producer{peerInfo: client.peerInfo}) {
log.Printf("DB: client(%s) REGISTER category:%s key:%s subkey:%s",
client, "channel", topic, channel)
}
}
key := Registration{"topic", topic, ""}
if p.context.nsqlookupd.DB.AddProducer(key, &Producer{peerInfo: client.peerInfo}) {
log.Printf("DB: client(%s) REGISTER category:%s key:%s subkey:%s",
client, "topic", topic, "")
}
return []byte("OK"), nil
}
func (p *ProtocolV2) CLS(client *ClientV2, params [][]byte) ([]byte, error) {
if atomic.LoadInt32(&client.State) != nsq.StateSubscribed {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "cannot CLS in current state")
}
client.StartClose()
return []byte("CLOSE_WAIT"), nil
}
func (p *ProtocolV2) TOUCH(client *ClientV2, params [][]byte) ([]byte, error) {
state := atomic.LoadInt32(&client.State)
if state != nsq.StateSubscribed && state != nsq.StateClosing {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "cannot TOUCH in current state")
}
if len(params) < 2 {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "TOUCH insufficient number of params")
}
id := *(*nsq.MessageID)(unsafe.Pointer(¶ms[1][0]))
err := client.Channel.TouchMessage(client.ID, id)
if err != nil {
return nil, util.NewClientErr(err, "E_TOUCH_FAILED",
fmt.Sprintf("TOUCH %s failed %s", id, err.Error()))
}
return nil, nil
}
func getTopicChan(command string, params []string) (string, string, error) {
if len(params) == 0 {
return "", "", util.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 !nsq.IsValidTopicName(topicName) {
return "", "", util.NewFatalClientErr(nil, "E_BAD_TOPIC", fmt.Sprintf("%s topic name '%s' is not valid", command, topicName))
}
if channelName != "" && !nsq.IsValidChannelName(channelName) {
return "", "", util.NewFatalClientErr(nil, "E_BAD_CHANNEL", fmt.Sprintf("%s channel name '%s' is not valid", command, channelName))
}
return topicName, channelName, 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, util.NewFatalClientErr(nil, "E_INVALID", fmt.Sprintf("invalid command %s", params[0]))
}
func (p *ProtocolV2) SUB(client *ClientV2, params [][]byte) ([]byte, error) {
if atomic.LoadInt32(&client.State) != nsq.StateInit {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "cannot SUB in current state")
}
if client.HeartbeatInterval < 0 {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "cannot SUB with heartbeats disabled")
}
if len(params) < 3 {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "SUB insufficient number of parameters")
}
topicName := string(params[1])
if !nsq.IsValidTopicName(topicName) {
return nil, util.NewFatalClientErr(nil, "E_BAD_TOPIC",
fmt.Sprintf("SUB topic name '%s' is not valid", topicName))
}
channelName := string(params[2])
if !nsq.IsValidChannelName(channelName) {
return nil, util.NewFatalClientErr(nil, "E_BAD_CHANNEL",
fmt.Sprintf("SUB channel name '%s' is not valid", channelName))
}
topic := p.context.nsqd.GetTopic(topicName)
channel := topic.GetChannel(channelName)
channel.AddClient(client.ID, client)
atomic.StoreInt32(&client.State, nsq.StateSubscribed)
client.Channel = channel
// update message pump
client.SubEventChan <- channel
return okBytes, nil
}
func (p *LookupProtocolV1) UNREGISTER(client *ClientV1, reader *bufio.Reader, params []string) ([]byte, error) {
if client.peerInfo == nil {
return nil, util.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.context.nsqlookupd.DB.RemoveProducer(key, client.peerInfo.id)
if removed {
log.Printf("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.context.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.context.nsqlookupd.DB.FindRegistrations("channel", topic, "*")
for _, r := range registrations {
if removed, _ := p.context.nsqlookupd.DB.RemoveProducer(r, client.peerInfo.id); removed {
log.Printf("WARNING: client(%s) unexpected UNREGISTER category:%s key:%s subkey:%s",
client, "channel", topic, r.SubKey)
}
}
key := Registration{"topic", topic, ""}
if removed, _ := p.context.nsqlookupd.DB.RemoveProducer(key, client.peerInfo.id); removed {
log.Printf("DB: client(%s) UNREGISTER category:%s key:%s subkey:%s",
client, "topic", topic, "")
}
}
return []byte("OK"), nil
}
func (p *ProtocolV2) PUB(client *ClientV2, params [][]byte) ([]byte, error) {
var err error
if len(params) < 2 {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "PUB insufficient number of parameters")
}
topicName := string(params[1])
if !nsq.IsValidTopicName(topicName) {
return nil, util.NewFatalClientErr(nil, "E_BAD_TOPIC",
fmt.Sprintf("PUB topic name '%s' is not valid", topicName))
}
bodyLen, err := readLen(client.Reader, client.lenSlice)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_BAD_MESSAGE", "PUB failed to read message body size")
}
if bodyLen <= 0 {
return nil, util.NewFatalClientErr(nil, "E_BAD_MESSAGE",
fmt.Sprintf("PUB invalid message body size %d", bodyLen))
}
if int64(bodyLen) > p.context.nsqd.options.maxMessageSize {
return nil, util.NewFatalClientErr(nil, "E_BAD_MESSAGE",
fmt.Sprintf("PUB message too big %d > %d", bodyLen, p.context.nsqd.options.maxMessageSize))
}
messageBody := make([]byte, bodyLen)
_, err = io.ReadFull(client.Reader, messageBody)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_BAD_MESSAGE", "PUB failed to read message body")
}
topic := p.context.nsqd.GetTopic(topicName)
msg := nsq.NewMessage(<-p.context.nsqd.idChan, messageBody)
err = topic.PutMessage(msg)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_PUB_FAILED", "PUB failed "+err.Error())
}
return okBytes, nil
}
func (p *ProtocolV2) MPUB(client *ClientV2, params [][]byte) ([]byte, error) {
var err error
if len(params) < 2 {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "MPUB insufficient number of parameters")
}
topicName := string(params[1])
if !nsq.IsValidTopicName(topicName) {
return nil, util.NewFatalClientErr(nil, "E_BAD_TOPIC",
fmt.Sprintf("E_BAD_TOPIC MPUB topic name '%s' is not valid", topicName))
}
bodyLen, err := readLen(client.Reader, client.lenSlice)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_BAD_BODY", "MPUB failed to read body size")
}
if bodyLen <= 0 {
return nil, util.NewFatalClientErr(nil, "E_BAD_BODY",
fmt.Sprintf("MPUB invalid body size %d", bodyLen))
}
if int64(bodyLen) > p.context.nsqd.options.maxBodySize {
return nil, util.NewFatalClientErr(nil, "E_BAD_BODY",
fmt.Sprintf("MPUB body too big %d > %d", bodyLen, p.context.nsqd.options.maxBodySize))
}
messages, err := readMPUB(client.Reader, client.lenSlice, p.context.nsqd.idChan,
p.context.nsqd.options.maxMessageSize)
if err != nil {
return nil, err
}
topic := p.context.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, util.NewFatalClientErr(err, "E_MPUB_FAILED", "MPUB failed "+err.Error())
}
return okBytes, nil
}
func readMPUB(r io.Reader, tmp []byte, idChan chan nsq.MessageID, maxMessageSize int64) ([]*nsq.Message, error) {
numMessages, err := readLen(r, tmp)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_BAD_BODY", "MPUB failed to read message count")
}
if numMessages <= 0 {
return nil, util.NewFatalClientErr(err, "E_BAD_BODY",
fmt.Sprintf("MPUB invalid message count %d", numMessages))
}
messages := make([]*nsq.Message, 0, numMessages)
for i := int32(0); i < numMessages; i++ {
messageSize, err := readLen(r, tmp)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_BAD_MESSAGE",
fmt.Sprintf("MPUB failed to read message(%d) body size", i))
}
if messageSize <= 0 {
return nil, util.NewFatalClientErr(nil, "E_BAD_MESSAGE",
fmt.Sprintf("MPUB invalid message(%d) body size %d", i, messageSize))
}
if int64(messageSize) > maxMessageSize {
return nil, util.NewFatalClientErr(nil, "E_BAD_MESSAGE",
fmt.Sprintf("MPUB message too big %d > %d", messageSize, maxMessageSize))
}
msgBody := make([]byte, messageSize)
_, err = io.ReadFull(r, msgBody)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_BAD_MESSAGE", "MPUB failed to read message body")
}
messages = append(messages, nsq.NewMessage(<-idChan, msgBody))
}
return messages, nil
}
func (p *ProtocolV2) IDENTIFY(client *ClientV2, params [][]byte) ([]byte, error) {
var err error
if atomic.LoadInt32(&client.State) != nsq.StateInit {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "cannot IDENTIFY in current state")
}
bodyLen, err := readLen(client.Reader, client.lenSlice)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_BAD_BODY", "IDENTIFY failed to read body size")
}
if int64(bodyLen) > p.context.nsqd.options.maxBodySize {
return nil, util.NewFatalClientErr(nil, "E_BAD_BODY",
fmt.Sprintf("IDENTIFY body too big %d > %d", bodyLen, p.context.nsqd.options.maxBodySize))
}
body := make([]byte, bodyLen)
_, err = io.ReadFull(client.Reader, body)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_BAD_BODY", "IDENTIFY failed to read body")
}
// body is a json structure with producer information
fmt.Println(string(body))
var identifyData IdentifyDataV2
err = json.Unmarshal(body, &identifyData)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_BAD_BODY", "IDENTIFY failed to decode JSON body")
}
err = client.Identify(identifyData)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_BAD_BODY", "IDENTIFY "+err.Error())
}
// bail out early if we're not negotiating features
if !identifyData.FeatureNegotiation {
return okBytes, nil
}
tlsv1 := p.context.nsqd.tlsConfig != nil && identifyData.TLSv1
deflate := p.context.nsqd.options.deflateEnabled && identifyData.Deflate
deflateLevel := 0
if deflate {
if identifyData.DeflateLevel <= 0 {
deflateLevel = 6
}
deflateLevel = int(math.Min(float64(deflateLevel), float64(p.context.nsqd.options.maxDeflateLevel)))
}
snappy := p.context.nsqd.options.snappyEnabled && identifyData.Snappy
if deflate && snappy {
return nil, util.NewFatalClientErr(nil, "E_IDENTIFY_FAILED", "cannot enable both deflate and snappy compression")
}
resp, err := json.Marshal(struct {
MaxRdyCount int64 `json:"max_rdy_count"`
Version string `json:"version"`
MaxMsgTimeout int64 `json:"max_msg_timeout"`
MsgTimeout int64 `json:"msg_timeout"`
TLSv1 bool `json:"tls_v1"`
Deflate bool `json:"deflate"`
DeflateLevel int `json:"deflate_level"`
MaxDeflateLevel int `json:"max_deflate_level"`
Snappy bool `json:"snappy"`
SampleRate int32 `json:"sample_rate"`
}{
MaxRdyCount: p.context.nsqd.options.maxRdyCount,
Version: util.BINARY_VERSION,
MaxMsgTimeout: int64(p.context.nsqd.options.maxMsgTimeout / time.Millisecond),
MsgTimeout: int64(p.context.nsqd.options.msgTimeout / time.Millisecond),
TLSv1: tlsv1,
Deflate: deflate,
DeflateLevel: deflateLevel,
MaxDeflateLevel: p.context.nsqd.options.maxDeflateLevel,
Snappy: snappy,
SampleRate: client.SampleRate,
})
if err != nil {
panic("should never happen")
}
err = p.Send(client, nsq.FrameTypeResponse, resp)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_IDENTIFY_FAILED", "IDENTIFY failed "+err.Error())
}
if tlsv1 {
log.Printf("PROTOCOL(V2): [%s] upgrading connection to TLS", client)
err = client.UpgradeTLS()
if err != nil {
return nil, util.NewFatalClientErr(err, "E_IDENTIFY_FAILED", "IDENTIFY failed "+err.Error())
}
err = p.Send(client, nsq.FrameTypeResponse, okBytes)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_IDENTIFY_FAILED", "IDENTIFY failed "+err.Error())
}
}
if snappy {
log.Printf("PROTOCOL(V2): [%s] upgrading connection to snappy", client)
err = client.UpgradeSnappy()
if err != nil {
return nil, util.NewFatalClientErr(err, "E_IDENTIFY_FAILED", "IDENTIFY failed "+err.Error())
}
err = p.Send(client, nsq.FrameTypeResponse, okBytes)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_IDENTIFY_FAILED", "IDENTIFY failed "+err.Error())
}
}
if deflate {
log.Printf("PROTOCOL(V2): [%s] upgrading connection to deflate", client)
err = client.UpgradeDeflate(deflateLevel)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_IDENTIFY_FAILED", "IDENTIFY failed "+err.Error())
}
err = p.Send(client, nsq.FrameTypeResponse, okBytes)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_IDENTIFY_FAILED", "IDENTIFY failed "+err.Error())
}
}
return nil, nil
}
func (p *LookupProtocolV1) IDENTIFY(client *ClientV1, reader *bufio.Reader, params []string) ([]byte, error) {
var err error
if client.peerInfo != nil {
return nil, util.NewFatalClientErr(err, "E_INVALID", "cannot IDENTIFY again")
}
var bodyLen int32
err = binary.Read(reader, binary.BigEndian, &bodyLen)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_BAD_BODY", "IDENTIFY failed to read body size")
}
body := make([]byte, bodyLen)
_, err = io.ReadFull(reader, body)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_BAD_BODY", "IDENTIFY failed to read body")
}
// body is a json structure with producer information
peerInfo := PeerInfo{id: client.RemoteAddr().String()}
err = json.Unmarshal(body, &peerInfo)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_BAD_BODY", "IDENTIFY failed to decode JSON body")
}
peerInfo.RemoteAddress = client.RemoteAddr().String()
//TODO: remove this check for 1.0
if peerInfo.BroadcastAddress == "" {
peerInfo.BroadcastAddress = peerInfo.Address
}
// require all fields
if peerInfo.BroadcastAddress == "" || peerInfo.TcpPort == 0 || peerInfo.HttpPort == 0 || peerInfo.Version == "" {
return nil, util.NewFatalClientErr(nil, "E_BAD_BODY", "IDENTIFY missing fields")
}
peerInfo.lastUpdate = time.Now()
log.Printf("CLIENT(%s): IDENTIFY Address:%s TCP:%d HTTP:%d Version:%s",
client, peerInfo.BroadcastAddress, peerInfo.TcpPort, peerInfo.HttpPort, peerInfo.Version)
client.peerInfo = &peerInfo
if p.context.nsqlookupd.DB.AddProducer(Registration{"client", "", ""}, &Producer{peerInfo: client.peerInfo}) {
log.Printf("DB: client(%s) REGISTER category:%s key:%s subkey:%s", client, "client", "", "")
}
// build a response
data := make(map[string]interface{})
data["tcp_port"] = p.context.nsqlookupd.tcpAddr.Port
data["http_port"] = p.context.nsqlookupd.httpAddr.Port
data["version"] = util.BINARY_VERSION
hostname, err := os.Hostname()
if err != nil {
log.Fatalf("ERROR: unable to get hostname %s", err.Error())
}
data["address"] = hostname //TODO: remove for 1.0
data["broadcast_address"] = p.context.nsqlookupd.broadcastAddress
data["hostname"] = hostname
response, err := json.Marshal(data)
if err != nil {
log.Printf("ERROR: marshaling %v", data)
return []byte("OK"), nil
}
return response, nil
}