日志输出，空指针导致程序出错-测试获取帧

service/tool.go

@@ -40,35 +40,41 @@ func SetDeviceCurrentFrame(frame gocv.Mat, device_id int) error {
 	return nil
 }
 
-func GetDeviceCurrentFrame(device_id int) (gocv.Mat, int) {
+func GetDeviceCurrentFrame(deviceId int) (gocv.Mat, int) {
+	defer func() {
+		if err := recover(); err != nil {
+			log.Printf("设备:%d 错误: %v\n", deviceId, err)
+		}
+	}()
+
 	//获取读写锁
-	mutex_, ok := DeviceRWMap.Load(device_id)
+	mutex_, ok := DeviceRWMap.Load(deviceId)
 	if !ok {
 		return gocv.NewMat(), -1
 	}
 	mutex, ok := mutex_.(*sync.RWMutex)
 	if !ok {
-		log.Printf("DeviceRWMap 存储的不是 *sync.RWMutex 类型，device_id: %d", device_id)
+		log.Printf("DeviceRWMap 存储的不是 *sync.RWMutex 类型，device_id: %d", deviceId)
 		return gocv.NewMat(), -1
 	}
 	mutex.RLock()
 	defer mutex.RUnlock()
 	//获取当前帧
-	frameIface, ok := DeviceCurrentFrameMap.Load(device_id)
+	frameIface, ok := DeviceCurrentFrameMap.Load(deviceId)
 	if !ok {
 		return gocv.NewMat(), -1
 	}
 	frame, ok := frameIface.(gocv.Mat)
 	if !ok {
-		log.Printf("DeviceCurrentFrameMap 存储的不是 gocv.Mat 类型，device_id: %d", device_id)
+		log.Printf("DeviceCurrentFrameMap 存储的不是 gocv.Mat 类型，device_id: %d", deviceId)
 	}
-	frame_countIface, ok := DeviceFrameCount.Load(device_id)
+	frame_countIface, ok := DeviceFrameCount.Load(deviceId)
 	if !ok {
 		return gocv.NewMat(), -1
 	}
 	frame_count, ok := frame_countIface.(int)
 	if !ok {
-		log.Printf("DeviceFrameCount 存储的不是 int 类型，device_id: %d", device_id)
+		log.Printf("DeviceFrameCount 存储的不是 int 类型，device_id: %d", deviceId)
 	}
 	return frame, frame_count
 }
@@ -153,6 +159,11 @@ func Get(url string) int {
 }
 
 func GetVideoStream(id int) {
+	defer func() {
+		if err := recover(); err != nil {
+			log.Printf("设备:%d 错误: %v\n", id, err)
+		}
+	}()
 	is_get, ok := DeviceIsGettingFrame.Load(id)
 	if !ok {
 		log.Printf("device: %d  not found", id)