feat: optimize code

pkg/core/tunhandlerclient.go

@@ -31,6 +31,12 @@ func (h *tunHandler) HandleClient(ctx context.Context, tun net.Conn) {
 	}
 	d.SetTunInboundHandler(func(tunInbound <-chan *DataElem, tunOutbound chan<- *DataElem) {
 		for {
+			select {
+			case <-ctx.Done():
+				return
+			default:
+			}
+
 			packetConn, err := getRemotePacketConn(ctx, h.chain)
 			if err != nil {
 				log.Debugf("[tun-client] %s - %s: %s", tun.LocalAddr(), remoteAddr, err)

pkg/dev/main.go

@@ -386,10 +386,15 @@ func DoDev(ctx context.Context, devOption *Options, flags *pflag.FlagSet, f cmdu
 	}
 
 	// connect to cluster, in container or host
-	err = devOption.doConnect(ctx, f, transferImage)
+	finalFunc, err := devOption.doConnect(ctx, f, transferImage)
 	if err != nil {
 		return err
 	}
+	defer func() {
+		if finalFunc != nil {
+			finalFunc()
+		}
+	}()
 
 	var tempContainerConfig *containerConfig
 	err = validatePullOpt(devOption.Options.Pull)
@@ -418,7 +423,7 @@ func DoDev(ctx context.Context, devOption *Options, flags *pflag.FlagSet, f cmdu
 	return devOption.Main(ctx, tempContainerConfig)
 }
 
-func (d *Options) doConnect(ctx context.Context, f cmdutil.Factory, transferImage bool) error {
+func (d *Options) doConnect(ctx context.Context, f cmdutil.Factory, transferImage bool) (ff func(), err error) {
 	connect := &handler.ConnectOptions{
 		Headers:     d.Headers,
 		Workloads:   []string{d.Workload},
@@ -426,35 +431,35 @@ func (d *Options) doConnect(ctx context.Context, f cmdutil.Factory, transferImag
 		ExtraDomain: d.ExtraDomain,
 		Engine:      d.Engine,
 	}
-	if err := connect.InitClient(f); err != nil {
-		return err
+	if err = connect.InitClient(f); err != nil {
+		return
 	}
 	d.Namespace = connect.Namespace
 
-	if err := connect.PreCheckResource(); err != nil {
-		return err
+	if err = connect.PreCheckResource(); err != nil {
+		return
 	}
 	if len(connect.Workloads) > 1 {
-		return fmt.Errorf("can only dev one workloads at same time, workloads: %v", connect.Workloads)
+		return nil, fmt.Errorf("can only dev one workloads at same time, workloads: %v", connect.Workloads)
 	}
 	if len(connect.Workloads) < 1 {
-		return fmt.Errorf("you must provide resource to dev, workloads : %v is invaild", connect.Workloads)
+		return nil, fmt.Errorf("you must provide resource to dev, workloads : %v is invaild", connect.Workloads)
 	}
 	d.Workload = connect.Workloads[0]
 
 	// if no-proxy is true, not needs to intercept traffic
 	if d.NoProxy {
 		if len(connect.Headers) != 0 {
-			return fmt.Errorf("not needs to provide headers if is no-proxy mode")
+			return nil, fmt.Errorf("not needs to provide headers if is no-proxy mode")
 		}
 		connect.Workloads = []string{}
 	}
 
 	switch d.ConnectMode {
 	case ConnectModeHost:
-		go func() {
-			<-ctx.Done()
-			connectClient, err := daemon.GetClient(true).Disconnect(ctx, &rpc.DisconnectRequest{})
+		daemonClient := daemon.GetClient(true)
+		ff = func() {
+			connectClient, err := daemonClient.Disconnect(ctx, &rpc.DisconnectRequest{})
 			if err != nil {
 				log.Error(err)
 				return
@@ -469,10 +474,11 @@ func (d *Options) doConnect(ctx context.Context, f cmdutil.Factory, transferImag
 				}
 				log.Print(recv.Message)
 			}
-		}()
-		kubeconfig, err := util.ConvertToKubeconfigBytes(f)
+		}
+		var kubeconfig []byte
+		kubeconfig, err = util.ConvertToKubeconfigBytes(f)
 		if err != nil {
-			return err
+			return
 		}
 		req := &rpc.ConnectRequest{
 			KubeconfigBytes: string(kubeconfig),
@@ -487,43 +493,47 @@ func (d *Options) doConnect(ctx context.Context, f cmdutil.Factory, transferImag
 			Image:           config.Image,
 			Level:           int32(log.DebugLevel),
 		}
-		connectClient, err := daemon.GetClient(true).Connect(ctx, req)
+		var connectClient rpc.Daemon_ConnectClient
+		connectClient, err = daemonClient.Connect(ctx, req)
 		if err != nil {
-			return err
+			return
 		}
 		for {
 			recv, err := connectClient.Recv()
 			if err == io.EOF {
-				return nil
+				return ff, nil
 			} else if err != nil {
-				return err
+				return ff, err
 			}
 			log.Print(recv.Message)
 		}
 
 	case ConnectModeContainer:
 		var connectContainer *RunConfig
-		path, err := connect.GetKubeconfigPath()
+		var path string
+		path, err = connect.GetKubeconfigPath()
 		if err != nil {
-			return err
+			return
 		}
 		var platform *specs.Platform
 		if d.Options.Platform != "" {
-			p, err := platforms.Parse(d.Options.Platform)
+			var p specs.Platform
+			p, err = platforms.Parse(d.Options.Platform)
 			if err != nil {
-				return pkgerr.Wrap(err, "error parsing specified platform")
+				return nil, pkgerr.Wrap(err, "error parsing specified platform")
 			}
 			platform = &p
 		}
 		connectContainer, err = createConnectContainer(d.NoProxy, *connect, path, d.Cli, platform)
 		if err != nil {
-			return err
+			return
 		}
 		ctx, cancel := context.WithCancel(ctx)
 		defer cancel()
 		var id string
-		if id, err = run(ctx, connectContainer, d.Cli, d.DockerCli); err != nil {
-			return err
+		id, err = run(ctx, connectContainer, d.Cli, d.DockerCli)
+		if err != nil {
+			return
 		}
 		h := interrupt.New(func(signal os.Signal) {
 			os.Exit(0)
@@ -537,17 +547,17 @@ func (d *Options) doConnect(ctx context.Context, f cmdutil.Factory, transferImag
 		if err = runLogsWaitRunning(ctx, d.DockerCli, id); err != nil {
 			// interrupt by signal KILL
 			if ctx.Err() == context.Canceled {
-				return nil
+				return nil, nil
 			}
-			return err
+			return nil, err
 		}
 		if err = d.Copts.netMode.Set("container:" + id); err != nil {
-			return err
+			return nil, err
 		}
 	default:
-		return fmt.Errorf("unsupport connect mode: %s", d.ConnectMode)
+		return nil, fmt.Errorf("unsupport connect mode: %s", d.ConnectMode)
 	}
-	return nil
+	return nil, nil
 }
 
 func createConnectContainer(devOptions bool, connect handler.ConnectOptions, path string, cli *client.Client, platform *specs.Platform) (*RunConfig, error) {