_progressSubscription = _fileUploader.progress.listen((progress) {
      if ((progress.status == UploadTaskStatus.running &&
          progress.progress % 5 == 0) ||
          progress.status != UploadTaskStatus.running) {
        _uploadProgressController.add(UploadFileProgressEvent(
            progress.taskId, progress.status, progress.progress));
      }
    });

    _resultSubscription = _fileUploader.result.listen((result) {
      if (result.statusCode < 400) {
        _uploadStatusController.add(UploadFileStatusEvent(
            result.taskId, result.status, json.decode(result.response), false));
      } else {
        _uploadStatusController.add(UploadFileStatusEvent(
            result.taskId, result.status, null, true));
      }
    }, onError: (ex, stacktrace) {
      if (ex != null) {
        _uploadStatusController.add(UploadFileStatusEvent(
            ex.taskId,
            ex.status,
            {
              'message': ex.message,
              'code': ex.code,
              'statusCode': ex.statusCode
            },
            true));
      }
    });