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@kwaiks
Created January 27, 2021 10:53
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Flutter Dio Interceptor for refresh token
class DioHelper {
final Dio dio;
DioHelper({@required this.dio});
final CustomSharedPreferences _customSharedPreferences =
new CustomSharedPreferences();
static String _baseUrl = BASE_URL;
String token = "";
void initializeToken(String savedToken) {
token = savedToken;
_initApiClient();
}
Future<void> initApiClient() {
dio.interceptors
.add(InterceptorsWrapper(onRequest: (RequestOptions options) {
options.headers["Authorization"] = "Bearer " + token;
return options;
}, onResponse: (Response response) {
return response;
}, onError: (DioError error) async {
RequestOptions origin = error.response.request;
if (error.response.statusCode == 401) {
try {
Response<dynamic> data = await dio.get("your_refresh_url");
token = data.data['newToken'];
_customSharedPreferences.setToken(data.data['newToken']);
origin.headers["Authorization"] = "Bearer " + data.data['newToken'];
return dio.request(origin.path, options: origin);
} catch (err) {
return err;
}
}
return error;
}));
dio.options.baseUrl = _baseUrl;
}
Future<dynamic> get(String url) async {
try {
final response = await dio.get(url);
var apiResponse = ApiResponse.fromJson(response.data);
if (apiResponse.status != 200) {
throw Exception(apiResponse.message);
}
return apiResponse.data;
} on DioError catch (e) {
// debugging purpose
print('[Dio Helper - GET] Connection Exception => ' + e.message);
throw e;
}
}
Future<dynamic> post(String url,
{Map headers, @required data, encoding}) async {
try {
final response =
await dio.post(url, data: data, options: Options(headers: headers));
ApiResponse apiResponse = ApiResponse.fromJson(response.data);
if (apiResponse.status != 200) {
throw Exception(apiResponse.message);
}
return apiResponse.data;
} on DioError catch (e) {
// debugging purpose
print('[Dio Helper - GET] Connection Exception => ' + e.message);
throw e;
}
}
}
@alejandroo8a
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there is an example here to navigate to login page. https://medium.com/flutter-community/dio-interceptors-in-flutter-17be4214f363

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