获取当前帧bytes

service/tool.go

@@ -97,6 +97,8 @@ func GetDeviceCurrentFrameV4(deviceId int, curCount int) (buf []byte, cnt int) {
 	defer func() {
 		if err := recover(); err != nil {
 			log.Printf("设备:%d 错误: %v\n", deviceId, err)
+			// 异常时释放 buf
+			buf = nil
 		}
 	}()
 	//获取读写锁
@@ -120,21 +122,32 @@ func GetDeviceCurrentFrameV4(deviceId int, curCount int) (buf []byte, cnt int) {
 		return nil, frameCount
 	}
 	//获取当前帧
+	var tempBuf []byte
 	switch deviceId {
 	case 1:
 		if Device1CurrentFrame.Empty() {
 			return nil, -1
 		}
-		buf = Device1CurrentFrame.ToBytes()
+		tempBuf = Device1CurrentFrame.ToBytes()
 	case 50:
 		if Device50CurrentFrame.Empty() {
 			return nil, -1
 		}
-		buf = Device50CurrentFrame.ToBytes()
+		tempBuf = Device50CurrentFrame.ToBytes()
 	case 73:
 		if Device73CurrentFrame.Empty() {
 			return nil, -1
 		}
+		tempBuf = Device73CurrentFrame.ToBytes()
+	default:
+		return nil, -1
+	}
+	// 避免直接返回大数组，可考虑复制必要的数据
+	if len(tempBuf) > 0 {
+		buf = make([]byte, len(tempBuf))
+		copy(buf, tempBuf)
+		// 释放临时变量
+		tempBuf = nil
 	}
 	return buf, frameCount
 }