dioMultipart static method

dynamic dioMultipart({ required String urlPath, Map<String, dynamic>? queryPara, Map<String, dynamic>? headers, Map<String, Map<String, dynamic>>? files, Map<String, String>? fields, })

Multipart request of DIO for file uploads Example:

final result = await PackageDio.dioMultipart(
  urlPath: '/upload',
  files: {
    'image': {
      'path': '/path/to/image.jpg',
      'filename': 'image.jpg',
    },
  },
  fields: {
    'title': 'My Image',
    'description': 'Image description',
  },
);

Implementation

static dioMultipart({
  required String urlPath,
  Map<String, dynamic>? queryPara,
  Map<String, dynamic>? headers,
  Map<String, Map<String, dynamic>>? files,
  Map<String, String>? fields,
}) async {
  try {
    final formData = FormData();

    // Add form fields
    if (fields != null) {
      for (final entry in fields.entries) {
        formData.fields.add(MapEntry(entry.key, entry.value));
      }
    }

    // Add files
    if (files != null) {
      for (final entry in files.entries) {
        final fieldName = entry.key;
        final fileData = entry.value;

        MultipartFile multipartFile;

        if (fileData.containsKey('path')) {
          // File from path
          final filePath = fileData['path'] as String;
          final filename = fileData['filename'] as String? ?? filePath.split('/').last;

          multipartFile = await MultipartFile.fromFile(
            filePath,
            filename: filename,
          );
        } else if (fileData.containsKey('bytes')) {
          // File from bytes
          final bytesList = fileData['bytes'];
          final bytes = bytesList is List<int> ? bytesList : (bytesList as Uint8List).toList();
          final filename = fileData['filename'] as String? ?? 'file_${DateTime.now().millisecondsSinceEpoch}';

          multipartFile = MultipartFile.fromBytes(
            bytes,
            filename: filename,
          );
        } else {
          return Failure(ErrorResponse(
              unifiedHttpClientEnum: UnifiedHttpClientEnum.badRequestError,
              errorResponseHolder:
                  ErrorResponseHolder(defaultMessage: 'Invalid file data for field "$fieldName". Must provide either "path" or "bytes".')));
        }

        formData.files.add(MapEntry(fieldName, multipartFile));
      }
    }

    final res = await _dio.post(
      urlPath,
      data: formData,
      queryParameters: queryPara,
      options: Options(headers: headers),
    );
    return res;
  } on PlatformException {
    return Failure(ErrorResponse(
        unifiedHttpClientEnum: UnifiedHttpClientEnum.platformExceptionError,
        errorResponseHolder: ErrorResponseHolder(defaultMessage: 'Platform Exception Caught')));
  } on SocketException catch (e) {
    return Failure(ErrorResponse(
        unifiedHttpClientEnum: UnifiedHttpClientEnum.socketExceptionError,
        errorResponseHolder: ErrorResponseHolder(defaultMessage: 'Socket Exception:$e')));
  } on FormatException {
    return Failure(ErrorResponse(
        unifiedHttpClientEnum: UnifiedHttpClientEnum.formatExceptionError,
        errorResponseHolder: ErrorResponseHolder(defaultMessage: 'format exception Error')));
  } on DioException catch (e) {
    debugPrint('error of dioexp in multipart : ${e.type}');
    return Failure(ErrorResponse(
        unifiedHttpClientEnum: UnifiedHttpClientEnum.undefined,
        errorResponseHolder: ErrorResponseHolder(defaultMessage: 'Dio Exception in multipart: ${e.message}')));
  } catch (e) {
    return Failure(ErrorResponse(
        unifiedHttpClientEnum: UnifiedHttpClientEnum.undefined,
        errorResponseHolder: ErrorResponseHolder(defaultMessage: 'something went Wrong : $e')));
  }
}