Dio: Can not upload file with FomData

[fvisticot]

Platform Name flutter / android
Platform Version 1.9
Dio Version 3.04

I try to upload a file from bytes or from file and I get an error from server => "Current request is not a multipart request"

It was working with Dio Version 2.X

Future<UpdatePictureResponse> updateUserPicture(
      {File file, List<int> bytes}) async {
    FormData formData;
    if (file != null) {
      formData = FormData.fromMap({
        "image":
            await MultipartFile.fromFile(file.path, filename: "picture.jpg"),
      });
    } else if (bytes != null) {
      final multiPartBytes =
          await MultipartFile.fromBytes(bytes, filename: "picture.jpg");
      formData = FormData.fromMap({
        "image": multiPartBytes,
      });
    } else {
      throw ApiException('No image set');
    }

    try {
      final response = await _dio.post('/uaa/account/image',
          data: formData,
          options: Options(contentType: Headers.formUrlEncodedContentType),
          onSendProgress: (send, total) {});
      return UpdatePictureResponse(
          imageUrl: response.data['image_url'],
          thumbnailUrl: response.data['thumbnail_url']);
    } on DioError catch (e) {
      throw ApiException(e.message);
    } catch (e) {
      throw ApiException(e);
    }
  }

[fvisticot]

Same issue with 3.0.5

[fvisticot]

Adding logging interceptor I have this request:

1. Not sure content Type is correct
2. I can not see the detail of FormData with this interceptor

I/flutter (12327): *** Request ***
I/flutter (12327): uri: https://api.xxx/v2/uaa/account/image
I/flutter (12327): method: POST
I/flutter (12327): responseType: ResponseType.json
I/flutter (12327): followRedirects: true
I/flutter (12327): connectTimeout: 5000
I/flutter (12327): receiveTimeout: 5000
I/flutter (12327): extra: {}
I/flutter (12327): headers:
I/flutter (12327):  content-type: application/json; charset=utf-8
I/flutter (12327):  Accept: application/json
I/flutter (12327):  Content-Type: application/json
I/flutter (12327): data:
I/flutter (12327): Instance of 'FormData'

[IkhwanSI13]

in version 3.0.5 too

[madboy1987]

try { final response = await _dio.post('/uaa/account/image', data: formData, onSendProgress: (send, total) {}); return UpdatePictureResponse( imageUrl: response.data['image_url'], thumbnailUrl: response.data['thumbnail_url']); } on DioError catch (e) { throw ApiException(e.message); } catch (e) { throw ApiException(e); }

try this,remove options: Options(contentType: Headers.formUrlEncodedContentType),

[fvisticot]

I have tried to remove the option as you was suggesting..
But issue is still there.

[PiN73]

It seems #562 breaks uploading files

[wendux]

@fvisticot Check whether the request body is correct with proxy tool (e.g charles).

[fvisticot]

I have checked with 3.0.7 and still the same issue.

Additional information:

• Can not see FormData in Alice Dio Plugin :(
• In Alice I can see that Content Type is present 2 times in header
  content-type (lower case) : multipart ...
  Content-Type (upper case): application/json

for information I'm using the same dio client for json and formData

[fvisticot]

If i create a "dedicated" DIO instance to upload the file it is OK,
If i use a "global" DIO instance used for JSON and FormData it does not Work

[rio45ka]

@fvisticot what mean "dedicated", you solved your problem?

[droidluv]

Yup this is happening to me as well, also I'm not sure whether you guys noticed but content type randomly becomes null for other types of POST requests, @rio45ka I think he means a dynamic instance type when @fvisticot says a dedicated dio instance, I tried it and its not resolving the issue for me though, working with dio 3.x is causing way too many problems, version 2.1.16, doesn't give me any problems at all though, sad such an amazing library has become like this, just because it rushed to add web support.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. If this is still an issue, please make sure it is up to date and if so, add a comment that this is still an issue to keep it open. Thank you for your contributions.

[Joezzy]

If i create a "dedicated" DIO instance to upload the file it is OK,
If i use a "global" DIO instance used for JSON and FormData it does not Work

how did you create this dedicated instance