dart - 使用 dio 包上传图片失败

Question

我正在尝试使用 Dio 包在 flutter 中上传图片，但失败了。我需要在 formdata 中发送图像。

API >> 需要请求体作为imageUpload:image

图片上传代码

 static Future uploadProfilePicToS3(File imageFile) async {
    try {
      FormData formData = new FormData.from(
          {'imageUpload': new UploadFileInfo(imageFile, "profile_pic.jpg")});
      var response =
          await Dio().post(UPLOAD_PROFILE_PIC, data: {'imageUpload': formData});
      print(response.statusCode);
    } catch (error) {
      throw (error);
    }
  }

错误>>>

E/flutter ( 4025): [ERROR:flutter/lib/ui/ui_dart_state.cc(148)] Unhandled Exception: DioError [DioErrorType.DEFAULT]: Converting object to an encodable object failed: Instance of 'UploadFileInfo'#0

如果有任何其他方法，请告诉我。

Answer 1

我使用 dio 以这种方式发布带有一些其他信息的文件路径:

  Dio dio = new Dio();
  FormData formData = new FormData();
  formData.add(
    "apiKey",
    "my_api_key",
  );
  formData.add(
    "file",
    "image_path",
  );
  Response response = await dio.post(
    "https://localhost",
    data: formData,
    onSendProgress: (int sent, int total) {
      // do something
    },
  ).catchError((onError) {
    throw Exception('something');
  });