Question 79492 in Flutter Question posted in
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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

Tags:

2

Answers


  1. 0

    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),
      ),
    ),
  ));
}

    enter image description here

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  2. 0

    The answer given by powerman23rus works perfectly with retrofit, but if you are looking for a package that requires less code, u can try the http package (https://pub.dev/packages/http) which doesn’t require tags or generated files. You can receive an image like this:

    import 'package:http/http.dart' as http;

late http.Response response;
  response = await http
      .get(
    Uri.parse("https://www.example.com/Cards/GetRandom.png"),
    headers: {"Authorization":"Bearer "+token}
  )
      .timeout(const Duration(seconds: 7));
Uint8List image = response.bodyBytes;

    Once obtained, you can use this widget to render the image:

    Image.memory(image)
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