func (p *protocolV2) IDENTIFY(client *nsqd.ClientV2, params [][]byte) ([]byte, error) {
var err error
state := atomic.LoadInt32(&client.State)
if state != stateInit {
nsqd.NsqLogger().LogWarningf("[%s] command in wrong state: %v", client, state)
return nil, protocol.NewFatalClientErr(nil, E_INVALID, "cannot IDENTIFY in current state")
}
bodyLen, err := readLen(client.Reader, client.LenSlice)
if err != nil {
return nil, protocol.NewFatalClientErr(err, "E_BAD_BODY", "IDENTIFY failed to read body size")
}
if int64(bodyLen) > p.ctx.getOpts().MaxBodySize {
return nil, protocol.NewFatalClientErr(nil, "E_BAD_BODY",
fmt.Sprintf("IDENTIFY body too big %d > %d", bodyLen, p.ctx.getOpts().MaxBodySize))
}
if bodyLen <= 0 {
return nil, protocol.NewFatalClientErr(nil, "E_BAD_BODY",
fmt.Sprintf("IDENTIFY invalid body size %d", bodyLen))
}
body := make([]byte, bodyLen)
_, err = io.ReadFull(client.Reader, body)
if err != nil {
return nil, protocol.NewFatalClientErr(err, "E_BAD_BODY", "IDENTIFY failed to read body")
}
// body is a json structure with producer information
var identifyData nsqd.IdentifyDataV2
err = json.Unmarshal(body, &identifyData)
if err != nil {
return nil, protocol.NewFatalClientErr(err, "E_BAD_BODY", "IDENTIFY failed to decode JSON body")
}
nsqd.NsqLogger().LogDebugf("PROTOCOL(V2): [%s] %+v", client, identifyData)
err = client.Identify(identifyData)
if err != nil {
return nil, protocol.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.ctx.GetTlsConfig() != nil && identifyData.TLSv1
deflate := p.ctx.getOpts().DeflateEnabled && identifyData.Deflate
deflateLevel := 0
if deflate {
if identifyData.DeflateLevel <= 0 {
deflateLevel = 6
}
deflateLevel = int(math.Min(float64(deflateLevel), float64(p.ctx.getOpts().MaxDeflateLevel)))
}
snappy := p.ctx.getOpts().SnappyEnabled && identifyData.Snappy
if deflate && snappy {
return nil, protocol.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"`
AuthRequired bool `json:"auth_required"`
OutputBufferSize int `json:"output_buffer_size"`
OutputBufferTimeout int64 `json:"output_buffer_timeout"`
}{
MaxRdyCount: p.ctx.getOpts().MaxRdyCount,
Version: version.Binary,
MaxMsgTimeout: int64(p.ctx.getOpts().MaxMsgTimeout / time.Millisecond),
MsgTimeout: int64(client.MsgTimeout / time.Millisecond),
TLSv1: tlsv1,
Deflate: deflate,
DeflateLevel: deflateLevel,
MaxDeflateLevel: p.ctx.getOpts().MaxDeflateLevel,
Snappy: snappy,
SampleRate: client.SampleRate,
AuthRequired: p.ctx.isAuthEnabled(),
OutputBufferSize: client.OutputBufferSize,
OutputBufferTimeout: int64(client.OutputBufferTimeout / time.Millisecond),
})
if err != nil {
return nil, protocol.NewFatalClientErr(err, "E_IDENTIFY_FAILED", "IDENTIFY failed "+err.Error())
}
err = Send(client, frameTypeResponse, resp)
if err != nil {
return nil, protocol.NewFatalClientErr(err, "E_IDENTIFY_FAILED", "IDENTIFY failed "+err.Error())
}
if tlsv1 {
nsqd.NsqLogger().Logf("PROTOCOL(V2): [%s] upgrading connection to TLS", client)
err = client.UpgradeTLS()
if err != nil {
return nil, protocol.NewFatalClientErr(err, "E_IDENTIFY_FAILED", "IDENTIFY failed "+err.Error())
}
err = Send(client, frameTypeResponse, okBytes)
if err != nil {
return nil, protocol.NewFatalClientErr(err, "E_IDENTIFY_FAILED", "IDENTIFY failed "+err.Error())
}
}
if snappy {
nsqd.NsqLogger().Logf("PROTOCOL(V2): [%s] upgrading connection to snappy", client)
err = client.UpgradeSnappy()
if err != nil {
return nil, protocol.NewFatalClientErr(err, "E_IDENTIFY_FAILED", "IDENTIFY failed "+err.Error())
}
err = Send(client, frameTypeResponse, okBytes)
if err != nil {
return nil, protocol.NewFatalClientErr(err, "E_IDENTIFY_FAILED", "IDENTIFY failed "+err.Error())
}
}
if deflate {
nsqd.NsqLogger().Logf("PROTOCOL(V2): [%s] upgrading connection to deflate", client)
err = client.UpgradeDeflate(deflateLevel)
if err != nil {
return nil, protocol.NewFatalClientErr(err, "E_IDENTIFY_FAILED", "IDENTIFY failed "+err.Error())
}
err = Send(client, frameTypeResponse, okBytes)
if err != nil {
return nil, protocol.NewFatalClientErr(err, "E_IDENTIFY_FAILED", "IDENTIFY failed "+err.Error())
}
}
return nil, nil
}