support ws health check config

internal/app/api/ws.go

@@ -64,7 +64,7 @@ func (w *wsApi) WebsocketHandle(ctx *gin.Context) {
 		CancelFunc: cancel,
 	}
 	proc.ReadCache(wci)
-	w.startWsConnect(conn, proc, hasOprPermission(ctx, uuid, constants.OPERATION_TERMINAL_WRITE))
+	w.startWsConnect(conn, cancel, proc, hasOprPermission(ctx, uuid, constants.OPERATION_TERMINAL_WRITE))
 	proc.AddConn(reqUser, wci)
 	defer proc.DeleteConn(reqUser)
 	conn.SetCloseHandler(func(_ int, _ string) error {
@@ -84,14 +84,14 @@ func (w *wsApi) WebsocketHandle(ctx *gin.Context) {
 	conn.Close()
 }
 
-func (w *wsApi) startWsConnect(conn *websocket.Conn, proc logic.Process, write bool) {
+func (w *wsApi) startWsConnect(conn *websocket.Conn, cancel context.CancelFunc, proc logic.Process, write bool) {
 	log.Logger.Debugw("ws读取线程已启动")
 	go func() {
 		for {
 			_, b, err := conn.ReadMessage()
 			if err != nil {
 				log.Logger.Debugw("ws读取线程已退出", "info", err)
-				conn.Close()
+				cancel()
 				return
 			}
 			if write {
@@ -100,22 +100,31 @@ func (w *wsApi) startWsConnect(conn *websocket.Conn, proc logic.Process, write b
 			}
 		}
 	}()
-	// // health check
-	// pongChan := make(chan struct{})
-	// conn.SetPongHandler(func(appData string) error {
-	// 	pongChan <- struct{}{}
-	// 	return nil
-	// })
-	// timer := time.NewTicker(time.Second)
-	// go func() {
-	// 	for {
-	// 		conn.WriteMessage(websocket.PingMessage, nil)
-	// 		select {
-	// 		case <-pongChan:
-	// 			timer.Reset(time.Second)
-	// 		case <-timer.C:
-	// 			conn.Close()
-	// 		}
-	// 	}
-	// }()
+	if config.CF.WsProactiveHealthCheck {
+		w.proactiveHealthCheck(conn, cancel)
+	}
+}
+
+func (w *wsApi) proactiveHealthCheck(conn *websocket.Conn, cancel context.CancelFunc) {
+	pongChan := make(chan struct{})
+	conn.SetPongHandler(func(appData string) error {
+		pongChan <- struct{}{}
+		return nil
+	})
+	timer := time.NewTimer(time.Second)
+	go func() {
+		defer timer.Stop()
+		for {
+			conn.WriteMessage(websocket.PingMessage, nil)
+			select {
+			case <-pongChan:
+				timer.Reset(time.Second)
+			case <-timer.C:
+				log.Logger.Debugw("pong报文超时,结束ws连接")
+				cancel()
+				return
+			}
+			time.Sleep(time.Second * 3)
+		}
+	}()
 }