Flutter dio cannot go to the interceptor when it call - flutter

Question

I tried refreshing my tokens when my calling api goes to error 401 (token expires) but when it calls dio interceptor is not triggered.
api.dart is definition of my dio
Dio _createHttpClient() {
final api = Dio(
new BaseOptions(
baseUrl: environments.api,
contentType: Headers.jsonContentType,
responseType: ResponseType.json,
),
);
api
..interceptors.clear()
..interceptors.add(new ErrorDialogInterceptor())
..interceptors.add(new AuthTokenInterceptor(api));
return api;
}
final api = _createHttpClient();
profil_provider.dart is the call of my api
Future<ProfilePicture?> getPictureProfile(String id) async {
String url = '/v1/users/$id/profile-picture';
try {
final response = await api.get(
url,
options: Options(
responseType: ResponseType.bytes,
headers: {
ErrorDialogInterceptor.skipHeader: true,
},
),
);
Uint8List avatar = Uint8List.fromList(response.data);
return ProfilePicture(image: avatar);
} catch (e) {
print('e');
return null;
}
}
and it go to the catch error
auth_interceptor.dart is for manage my error and request of my api
class AuthTokenInterceptor extends Interceptor {
static const skipHeader = 'skipAuthToken';
Dio api;
AuthTokenInterceptor(this.api);
#override
onRequest(RequestOptions options, RequestInterceptorHandler handler) async {
final context = applicationKey.currentContext;
print("test");
final repository = context?.read<AuthRepository>();
if (repository == null) {
return;
}
final accessToken = await repository.getAccessToken();
print("access: $accessToken");
if (accessToken != null) {
print(accessToken);
options.headers['Authorization'] = 'Bearer $accessToken';
}
return super.onRequest(options, handler);
}
#override
onError(DioError err, ErrorInterceptorHandler handler) async {
final context = applicationKey.currentContext;
if (context == null) {
return;
}
final response = err.response?.data;
if (response == null) {
return super.onError(err, handler);
}
final repository = context.read<AuthRepository>();
if (err.response?.statusCode == 401)
if (err.response?.statusCode == 401 &&
await repository.getRefreshToken() != null) {
api.interceptors.clear();
return _handlerRefreshToken(context, repository, err, handler);
}
return super.onError(err, handler);
}
and it not go to the auth interceptor with my debug print, I don't know why it not go there with the error 401 from the catch error

Answer 1

you can do.
// returns the http request
Future<Response<ProfilePicture>> getPictureProfile(String id) {
String url = '/v1/users/$id/profile-picture';
return api.get(url)
}
//...
// and use a try/catch outside the method
try{
Response<ProfilePicture> respose = await getPictureProfile(555)
print(respose.data)
}catch(e){
print(e)
}