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nnet/core/processor_nnet.go

73 lines
1.7 KiB
Go

package core
import (
"encoding/json"
"errors"
"fmt"
"git.noahlan.cn/northlan/nnet/internal/log"
"git.noahlan.cn/northlan/nnet/internal/packet"
"time"
)
var (
hrd []byte // handshake response data
hbd []byte // heartbeat packet data
)
type NNetProcessor struct {
}
func NewNNetProcessor() *NNetProcessor {
// TODO custom hrd hbd
data, _ := json.Marshal(map[string]interface{}{
"code": 200,
"sys": map[string]float64{"heartbeat": time.Second.Seconds()},
})
packer := packet.NewNNetPacker()
hrd, _ = packer.Pack(packet.Handshake, data)
return &NNetProcessor{}
}
func (n *NNetProcessor) Process(conn *Connection, p packet.IPacket) error {
h, ok := p.(*packet.Packet)
if !ok {
return packet.ErrWrongPacketType
}
switch h.PacketType {
case packet.Handshake:
// TODO validate handshake
if err := conn.SendBytes(hrd); err != nil {
return err
}
conn.SetStatus(StatusPrepare)
log.Debugf("connection handshake Id=%d, Remote=%s", conn.ID(), conn.Conn().RemoteAddr())
case packet.HandshakeAck:
conn.SetStatus(StatusPending)
log.Debugf("receive handshake ACK Id=%d, Remote=%s", conn.ID(), conn.Conn().RemoteAddr())
case packet.Heartbeat:
// Expected
case packet.Data:
if conn.Status() < StatusPending {
return errors.New(fmt.Sprintf("receive data on socket which not yet ACK, session will be closed immediately, remote=%s",
conn.Conn().RemoteAddr()))
}
conn.SetStatus(StatusWorking)
var lastMid uint64
switch h.MsgType {
case packet.Request:
lastMid = h.ID
case packet.Notify:
lastMid = 0
default:
return fmt.Errorf("Invalid message type: %s ", h.MsgType.String())
}
conn.SetLastMID(lastMid)
}
conn.SetLastHeartbeatAt(time.Now().Unix())
return nil
}