修复多连接查看实时视频不正常关闭问题

handler/device.go

@@ -274,7 +274,7 @@ func subscribeAndHandleMessages(ws *websocket.Conn, device_id int) {
 		}
 	}
 	//查看是否还有其他连接，没有则设置is_play为0
-	if worker.GetRedisSetMembers(online_conn_key) == nil {
+	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")
 	}