Is it possible to read binary file with retrofit using flutter?

I have a binary file I need to read its contents using retrofit for my flutter application.

I want to know if this could be possible or not. if yes, any links, please?

Otherwise, I need some recommendations.

Thanks in advance for your help

First of all, you have to specify your retrofit client and specify your API inside and specify ReturnType.bytes by DioResponseType annotation

I'll make a simple example for downloading the image from the https://www.phoca.cz web site and in the same way you can download any type of files

part 'rest_client.g.dart';

@RestApi(baseUrl: "https://www.phoca.cz/")
abstract class RestClient {
  factory RestClient(Dio dio, {String baseUrl}) = _RestClient;

  @GET("images/phocadownloadsite/phocadownload-category-view-bootstrap-mobile-mobile-view.png")
  @DioResponseType(ResponseType.bytes)
  Future<HttpResponse<List<int>>> downloadFile();
}

Generate a code by

flutter pub run build_runner run

Initialise a client

final dio = Dio(); 
final client = RestClient(dio);
final response = await client.downloadFile();

And you can obtain the image through Image.memory

Future<void> main() async {
  final dio = Dio();
  final client = RestClient(dio);
  final response = await client.downloadFile();
  WidgetsFlutterBinding.ensureInitialized();

  runApp(MaterialApp(
    home: Scaffold(
      body: Center(
        child: Image.memory(response.response.data),
      ),
    ),
  ));
}