在Dio中使用拦截器使Flutter刷新令牌

我通过以下方式使用拦截器解决了它：

  Future<Dio> getApiClient() async {    token = await storage.read(key: USER_TOKEN);    _dio.interceptors.clear();    _dio.interceptors        .add(InterceptorsWrapper(onRequest: (RequestOptions options) {      // Do something before request is sent      options.headers["Authorization"] = "Bearer " + token;      return options;    },onResponse:(Response response) {        // Do something with response data        return response; // continue    }, onError: (DioError error) async {      // Do something with response error      if (error.response?.statusCode == 403) {        _dio.interceptors.requestLock.lock();        _dio.interceptors.responseLock.lock();        RequestOptions options = error.response.request;        FirebaseUser user = await FirebaseAuth.instance.currentUser();        token = await user.getIdToken(refresh: true);        await writeAuthKey(token);        options.headers["Authorization"] = "Bearer " + token;        _dio.interceptors.requestLock.unlock();        _dio.interceptors.responseLock.unlock();        return _dio.request(options.path,options: options);      } else {        return error;      }    }));    _dio.options.baseUrl = baseUrl;    return _dio;  }