/
serveclient.go
128 lines (110 loc) · 3.09 KB
/
serveclient.go
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package ws_handlereq
import (
"context"
"fmt"
"time"
"github.com/gorilla/websocket"
"github.com/kasworld/wasmwebsocket/golog"
"github.com/kasworld/wasmwebsocket/protocol/ws_error"
"github.com/kasworld/wasmwebsocket/protocol/ws_json"
"github.com/kasworld/wasmwebsocket/protocol/ws_loopwsgorilla"
"github.com/kasworld/wasmwebsocket/protocol/ws_packet"
)
// service const
const (
SendBufferSize = 10
PacketReadTimeoutSec = 6 * time.Second
PacketWriteTimeoutSec = 3 * time.Second
)
func (c2sc *ServeClientConn) String() string {
return fmt.Sprintf(
"ServeClientConn[%v SendCh:%v]",
c2sc.RemoteAddr,
len(c2sc.sendCh),
)
}
type ServeClientConn struct {
RemoteAddr string
sendCh chan ws_packet.Packet
sendRecvStop func()
}
func NewServeClientConn(remoteAddr string) *ServeClientConn {
c2sc := &ServeClientConn{
RemoteAddr: remoteAddr,
sendCh: make(chan ws_packet.Packet, SendBufferSize),
}
c2sc.sendRecvStop = func() {
golog.GlobalLogger.Fatal("Too early sendRecvStop call %v", c2sc)
}
return c2sc
}
func (c2sc *ServeClientConn) StartServeClientConn(mainctx context.Context, wsConn *websocket.Conn) {
golog.GlobalLogger.Debug("Start ServeServeClientConn %s", c2sc)
defer func() { golog.GlobalLogger.Debug("End ServeServeClientConn %s", c2sc) }()
sendRecvCtx, sendRecvCancel := context.WithCancel(mainctx)
c2sc.sendRecvStop = sendRecvCancel
go func() {
err := ws_loopwsgorilla.RecvLoop(sendRecvCtx, c2sc.sendRecvStop, wsConn,
PacketReadTimeoutSec, c2sc.HandleRecvPacket)
if err != nil {
golog.GlobalLogger.Error("end RecvLoop %v", err)
}
}()
go func() {
err := ws_loopwsgorilla.SendLoop(sendRecvCtx, c2sc.sendRecvStop, wsConn,
PacketWriteTimeoutSec, c2sc.sendCh,
ws_json.MarshalBodyFn, c2sc.handleSentPacket)
if err != nil {
golog.GlobalLogger.Error("end SendLoop %v", err)
}
}()
loop:
for {
select {
case <-sendRecvCtx.Done():
break loop
}
}
}
func (c2sc *ServeClientConn) handleSentPacket(header ws_packet.Header) error {
return nil
}
func (c2sc *ServeClientConn) HandleRecvPacket(header ws_packet.Header, rbody []byte) error {
// robj, err := ws_json.UnmarshalPacket(header, rbody)
// if err != nil {
// return err
// }
if header.FlowType != ws_packet.Request {
return fmt.Errorf("Unexpected header packet type: %v", header)
}
if int(header.Cmd) >= len(DemuxReq2BytesAPIFnMap) {
return fmt.Errorf("Invalid header command %v", header)
}
response, errcode, apierr := DemuxReq2BytesAPIFnMap[header.Cmd](c2sc, header, rbody)
if errcode != ws_error.Disconnect && apierr == nil {
rhd := header
rhd.FlowType = ws_packet.Response
rpk := ws_packet.Packet{
Header: rhd,
Body: response,
}
c2sc.enqueueSendPacket(rpk)
}
return apierr
}
func (c2sc *ServeClientConn) enqueueSendPacket(pk ws_packet.Packet) error {
trycount := 10
for trycount > 0 {
select {
case c2sc.sendCh <- pk:
return nil
default:
trycount--
}
golog.GlobalLogger.Warn(
"Send delayed, %s send channel busy %v, retry %v",
c2sc, len(c2sc.sendCh), 10-trycount)
time.Sleep(1 * time.Millisecond)
}
return fmt.Errorf("Send channel full %v", c2sc)
}