从Flask服务器向Flutter发送JSON数据时，数据没有完整出来，每次80-90后就被截断

Question

从 Flask 服务器向 Flutter 发送 JSON 数据时，数据不完整，每次在 80-90 个字符后就会被截断。我该如何解决这个问题？

当我拍照并将其发送到 Flask 服务器时，服务器返回 JSON 格式的值，但数据在中间被切断。我该如何解决这个问题？

 static Future<AiData> uploadImage(String imagePath) async {
    var formData = FormData.fromMap({
      'file': await MultipartFile.fromFile(imagePath),
    });

    try {
      final response = await flaskDio.post(
        '/upload',
        data: formData,
        options: Options(
          validateStatus: (status) {
            return status! < 500;
          },
        ),
      );

      if (response.statusCode == 200) {
        // JSON 형식의 응답 데이터를 문자열로 로깅
        final responseDataString = response.data.toString();
        logger.i('Raw response data: $responseDataString');

        try {
          // 응답 데이터를 JSON으로 디코딩
          var responseData = jsonDecode(responseDataString) as Map<String, dynamic>;
          logger.i('Decoded response data: $responseData');
          return AiData.fromJson(responseData);
        } catch (e) {
          logger.e('Failed to decode JSON: $e');
          throw Exception('Failed to decode JSON: $e');
        }
      } else {
        logger.e('Image upload failed.');
        throw Exception('Failed to upload image: ${response.statusMessage}');
      }
    } catch (e) {
      logger.e('Image upload failed: $e');
      if (e is DioError) {
        logger.e('Dio error message: ${e.message}');
        logger.e('Dio error response: ${e.response}');
        logger.e('Dio error response data: ${e.response?.data}');
      }
      throw Exception('Image upload failed: $e');
    }
  }

Answer 1

我有一种感觉，这可能是日志记录的截断问题，而不是实际输出的问题。

这里有一个线程，其中建议的解决方案是实现此自定义打印机，将输出分块为适当的大小：

void printWrapped(String text) {
  final pattern = new RegExp('.{1,800}'); // 800 is the size of each chunk
  pattern.allMatches(text).forEach((match) => print(match.group(0)));
}

执行此操作以确认您的 json 没有问题：

void printWrapped(String text) {
  final pattern = new RegExp('.{1,800}'); // 800 is the size of each chunk
  pattern.allMatches(text).forEach((match) => print(match.group(0)));
}

if (response.statusCode == 200) {
        // JSON 형식의 응답 데이터를 문자열로 로깅
        final responseDataString = response.data.toString();
        printWrapped('Raw response data: $responseDataString');
        }