How to upload images and file to a server in Flutter?

Question

I use a web service for image processing , it works well in Postman:

Now I want to make http request in flutter with Dart:

import \'pa         


        

Answer 1

With dio I do like this:

Future _uploadFileAsFormData(String path) async {
  try {
    final dio = Dio();

    dio.options.headers = {
      'Content-Type': 'application/x-www-form-urlencoded'
    };

    final file =
      await MultipartFile.fromFile(path, filename: 'test_file');

    final formData = FormData.fromMap({'file': file}); // 'file' - this is an api key, can be different

    final response = await dio.put( // or dio.post
      uploadFileUrlAsString,
      data: formData,
    );
  } catch (err) {
    print('uploading error: $err');
  }
}