dio interceptor

authentication_interceptor.dart

import 'package:app/data/storage/auth/auth_shared_references.dart';
import 'package:dio/dio.dart';
import 'package:kiwi/kiwi.dart';

class AuthenticationInterceptor extends Interceptor{

  AuthSharedPreferences _authSharedPreferences = KiwiContainer().resolve<AuthSharedPreferences>();

  @override
  Future onRequest(RequestOptions options) async {
    // #1 get access token from storage
	String token = await _authSharedPreferences.getAccessToken();
	//#2: edit header 
	options.headers.addAll({'Authorization': 'Bearer $token'});	
	return super.onRequest(options);

  }

  @override
  Future onError(DioError err) {
	return super.onError(err);
  }

  @override
  Future onResponse(Response response) {
	return super.onResponse(response);
  }
}

class RestClient{
  final Dio restClient = Dio();

  void setUp() {
    //#3: add authentication interceptor
	restClient.interceptors.addAll([AuthenticationInterceptor()]);
  }
}