func (p *protocol) Exec(client *client, params [][]byte) ([]byte, error) {
switch {
case bytes.Equal(params[0], []byte("H")):
return p.HEARTBEAT(client, params)
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 *protocol) FIN(client *client, params [][]byte) ([]byte, error) {
state := atomic.LoadInt32(&client.State)
if state != StateSubscribed && state != StateClosing {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "cannot FIN in current state")
}
if len(params) < 2 {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "FIN insufficient number of params")
}
// id := *(*MessageID)(unsafe.Pointer(¶ms[1][0]))
// err := client.Channel.FinishMessage(client.ID, id)
// if err != nil {
// return nil, util.NewClientErr(err, "E_FIN_FAILED",
// fmt.Sprintf("FIN %s failed %s", id, err.Error()))
// }
// client.FinishedMessage()
return nil, nil
}
func (p *protocol) PUB(client *client, params [][]byte) ([]byte, error) {
// var err error
var buf bytes.Buffer
if client.Role != "$_@push_sign_$_kz_worker" {
return nil, util.NewFatalClientErr(nil, "E_INVALID_REQUEST", "client can't pub message")
}
if len(params) < 3 {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "PUB insufficient number of parameters")
}
log.Printf("receive params on sub %s", params)
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.broker.options.MaxBodySize {
return nil, util.NewFatalClientErr(nil, "E_BAD_BODY",
fmt.Sprintf("IDENTIFY body too big %d > %d", bodyLen, p.context.broker.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")
}
client_id := string(params[1])
channel_id := string(params[2])
message_id := string(params[3])
msgId, _ := strconv.ParseInt(message_id, 10, 64)
log.Printf("msgId == %d", msgId)
// TODO 另外启动一个channel 与 goroutine 用来处理这个消息
dstClient, err := p.context.broker.GetClient(client_id, channel_id)
if err != nil || dstClient == nil {
p.ackPublish(client, util.ACK_OFF, client_id, msgId)
// model.SaveOfflineMessage(dstClient.ClientID, msgId)
log.Printf("client %s is null", client_id)
return nil, nil
//return nil, util.NewFatalClientErr(nil, "E_INVALID", "PUB insufficient number of parameters")
// return FrameTypeACKError message_id
}
log.Printf("get client %s by channel %s = %s ", client_id, channel_id, dstClient)
msg := &Message{
Id: util.Guid(msgId).Hex(),
Body: body,
Timestamp: time.Now().UnixNano(),
}
log.Printf("msg is %#v", msg)
// dstClient.SendingMessage()
err = p.SendMessage(dstClient, msg, &buf)
if err != nil {
log.Printf("send message to client %s error %s", dstClient, err)
}
dstClient.Lock()
err = dstClient.Flush()
dstClient.Unlock()
if err != nil {
p.ackPublish(client, util.ACT_ERR, client_id, msgId)
} else {
p.ackPublish(client, util.ACK_SUCCESS, client_id, msgId)
}
return nil, nil
}
func (p *protocol) SUB(client *client, params [][]byte) ([]byte, error) {
if atomic.LoadInt32(&client.State) != 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")
}
log.Printf("receive params on sub %s", params)
if len(params) < 1 {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "SUB insufficient number of parameters")
}
//TODO FIXME
str_channel_id := string(params[1])
channel_id, err := strconv.ParseInt(str_channel_id, 10, 64) //TODO need validate channel_id
if err != nil {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "invalid channel id ")
}
client_id, err := strconv.ParseInt(client.ClientID, 10, 64)
if err != nil {
log.Printf("invalid client id [%s] err: %s", client.ClientID, err)
return nil, util.NewFatalClientErr(nil, "E_INVALID", "invalid client id ")
}
channel, err := model.FindChannelByID(channel_id)
if err != nil || channel == nil {
return nil, util.NewFatalClientErr(nil, "E_INVALID", "invalid channel id ")
}
device, err := model.FindDeviceByID(client_id)
if err != nil || device == nil {
log.Printf("invalid client id [%d] err: %s", client_id, err)
return nil, util.NewFatalClientErr(nil, "E_INVALID", "invalid client id ")
}
//TODO send subscribe event
sub := &model.Subscribe{
ChannelID: channel_id,
DeviceID: client_id,
DeviceType: device.DeviceType,
CreatedAt: time.Now().UnixNano(),
UpdatedAt: time.Now().UnixNano(),
}
err = model.SaveOrUpdateSubscribe(sub)
if err != nil {
return nil, util.NewFatalClientErr(nil, "internal error", "save subscribe error")
}
p.context.broker.AddClient(client.ClientID, str_channel_id, client)
log.Printf("INFO: clientId %d sub channel %s success ", client.ClientID, channel_id)
// touch devie online
model.TouchDeviceOnline(client_id)
// should send client connected eventsf
log.Printf("INFO: SetClientConn clientID=%s, broker_addr=%s", client.ClientID, client.LocalAddr().String())
err = model.SetClientConn(client.ClientID, client.LocalAddr().String())
if err != nil {
return nil, util.NewFatalClientErr(nil, "internal error", "save subscribe error")
}
// increase channel sub count
// add client to channel sub list
// topic := p.context.broker.GetTopic(topicName)
// channel := topic.GetChannel(channelName)
// channel.AddClient(client.ID, client)
atomic.StoreInt32(&client.State, StateSubscribed)
client.SubChannel = str_channel_id
go p.checkOfflineMessage(client)
// client.Channel = channel
// update message pump
// client.SubEventChan <- channel
return okBytes, nil
}
func (p *protocol) IDENTIFY(client *client, params [][]byte) ([]byte, error) {
var err error
if atomic.LoadInt32(&client.State) != 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.broker.options.MaxBodySize {
return nil, util.NewFatalClientErr(nil, "E_BAD_BODY",
fmt.Sprintf("IDENTIFY body too big %d > %d", bodyLen, p.context.broker.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
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")
}
if p.context.broker.options.Verbose {
log.Printf("PROTOCOL(V2): [%s] %+v", client, identifyData)
}
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.broker.tlsConfig != nil && identifyData.TLSv1
deflate := p.context.broker.options.DeflateEnabled && identifyData.Deflate
deflateLevel := 0
if deflate {
if identifyData.DeflateLevel <= 0 {
deflateLevel = 6
}
deflateLevel = int(math.Min(float64(deflateLevel), float64(p.context.broker.options.MaxDeflateLevel)))
}
snappy := p.context.broker.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.broker.options.MaxRdyCount,
Version: util.BINARY_VERSION,
MaxMsgTimeout: int64(p.context.broker.options.MaxMsgTimeout / time.Millisecond),
MsgTimeout: int64(p.context.broker.options.MsgTimeout / time.Millisecond),
TLSv1: tlsv1,
Deflate: deflate,
DeflateLevel: deflateLevel,
MaxDeflateLevel: p.context.broker.options.MaxDeflateLevel,
Snappy: snappy,
SampleRate: client.SampleRate,
})
if err != nil {
return nil, util.NewFatalClientErr(err, "E_IDENTIFY_FAILED", "IDENTIFY failed "+err.Error())
}
err = p.Send(client, util.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, util.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, util.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, util.FrameTypeResponse, okBytes)
if err != nil {
return nil, util.NewFatalClientErr(err, "E_IDENTIFY_FAILED", "IDENTIFY failed "+err.Error())
}
}
return nil, nil
}