修复多用户查看实时视频，设备关闭后连接未正常关闭问题

handler/device.go

@@ -242,27 +242,10 @@ func subscribeAndHandleMessages(ws *websocket.Conn, device_id int) {
 	defer ws.Close()
 	ch := pubsub.Channel()
 	var check_cnt int
+	var ticker *time.Ticker
 	for {
 		select {
-		case msg, ok := <-ch:
+		case msg, _ := <-ch:
-			if !ok {
-				// 通道关闭或没有消息，每秒尝试检测连接
-				for {
-					err := ws.WriteControl(websocket.PingMessage, []byte{}, time.Now().Add(time.Second))
-					if err != nil {
-						clientsMux.Lock()
-						clients[ws] = false
-						clientsMux.Unlock()
-						// 查看是否还有其他连接，没有则设置 is_play 为 0
-						if worker.IsContainKey(online_conn_key) == false {
-							worker.SetRedisWithExpire(strconv.Itoa(device_id)+"_is_play", "0", time.Minute*5)
-							fmt.Println("device_id:", device_id, " has set is_play to 0")
-						}
-						return
-					}
-					time.Sleep(time.Second)
-				}
-			}
 			var res3 []byte
 			var msgObj proto.Message
 			if msg.Payload != "" {
@@ -290,9 +273,31 @@ func subscribeAndHandleMessages(ws *websocket.Conn, device_id int) {
 				clientsMux.Unlock()
 				fmt.Println("send message to client err:", err2)
 				worker.SetRedisSetRemove(online_conn_key, con_id)
-				return
+				goto end
+			}
+		default:
+			if ticker == nil {
+				ticker = time.NewTicker(time.Second)
+			}
+			select {
+			case <-ticker.C:
+				err := ws.WriteControl(websocket.PingMessage, []byte{}, time.Now().Add(time.Second))
+				if err != nil {
+					fmt.Println("Connection check failed:", err)
+					worker.SetRedisSetRemove(online_conn_key, con_id)
+					goto end
+				}
+			default:
+				continue
 			}
 		}
 	}
 
+end:
+	// 查看是否还有其他连接，没有则设置 is_play 为 0
+	if worker.IsContainKey(online_conn_key) == false {
+		worker.SetRedisWithExpire(strconv.Itoa(device_id)+"_is_play", "0", time.Minute*5)
+		fmt.Println("device_id:", device_id, " has set is_play to 0")
+	}
+
 }