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79 lines
2.0 KiB
Go
79 lines
2.0 KiB
Go
package nnet
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import (
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"encoding/json"
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"errors"
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"fmt"
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"git.noahlan.cn/noahlan/nnet"
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"git.noahlan.cn/noahlan/nnet/connection"
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"git.noahlan.cn/noahlan/nnet/packet"
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"git.noahlan.cn/noahlan/ntool/nlog"
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)
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type (
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HandshakeValidatorFunc func(*HandshakeReq) error
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HandshakeAckPayloadFunc func() any
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)
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func withNNetPipeline(
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handshakeResp *HandshakeResp,
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validator HandshakeValidatorFunc,
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packer packet.Packer,
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) nnet.RunOption {
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return func(ngin *nnet.Engine) {
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ngin.Pipeline().Inbound().PushFront(func(conn *connection.Connection, v any) error {
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pkg, ok := v.(*Packet)
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if !ok {
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return packet.ErrWrongPacketType
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}
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nc, _ := conn.Conn()
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switch pkg.PacketType {
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case Handshake:
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var handshakeData HandshakeReq
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err := json.Unmarshal(pkg.Data, &handshakeData)
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nlog.Must(err)
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if err := validator(&handshakeData); err != nil {
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return err
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}
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handshakeResp.Payload = handshakeData.Payload
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data, err := json.Marshal(handshakeResp)
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nlog.Must(err)
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hrd, _ := packer.Pack(Header{
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PacketType: Handshake,
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MessageHeader: MessageHeader{},
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}, data)
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if err := conn.SendBytes(hrd); err != nil {
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return err
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}
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conn.SetStatus(connection.StatusPrepare)
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nlog.Debugf("connection handshake Id=%d, Remote=%s", conn.Session().ID(), nc.RemoteAddr())
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case HandshakeAck:
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conn.SetStatus(connection.StatusPending)
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nlog.Debugf("receive handshake ACK Id=%d, Remote=%s", conn.Session().ID(), nc.RemoteAddr())
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case Data:
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if conn.Status() < connection.StatusPending {
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return errors.New(fmt.Sprintf("receive data on socket which not yet ACK, session will be closed immediately, remote=%s",
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nc.RemoteAddr()))
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}
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conn.SetStatus(connection.StatusWorking)
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var lastMid uint64
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switch pkg.MsgType {
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case Request:
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lastMid = pkg.ID
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case Notify:
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lastMid = 0
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default:
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return fmt.Errorf("Invalid message type: %s ", pkg.MsgType.String())
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}
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conn.SetLastMID(lastMid)
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}
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return nil
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})
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}
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}
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