在Dio中使用拦截器使Flutter刷新令牌

问题描述

我正试图在Dio中使用Interceptor和Dio，我必须处理令牌过期。
以下是我的代码

I am trying to use Interceptor with Dio in flutter, I have to handle Token expire.following is my code

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) {
        // update token and repeat
        // Lock to block the incoming request until the token updated

        _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();
        _dio.request(options.path, options: options);
      } else {
        return error;
      }
    }));
    _dio.options.baseUrl = baseUrl;
    return _dio;
  }

问题不是用新令牌重复网络呼叫，而是Dio返回

problem is instead of repeating the network call with the new token, Dio is returning the error object to the calling method, which in turn is rendering the wrong widget, any leads on how to handle token refresh with dio?

推荐答案

是调用方法的错误对象，而该方法又呈现了错误的小部件，是否导致使用dio处理令牌刷新？

我使用拦截器通过以下方式解决了它：-

I solved it using interceptors in following way :-

  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;
  }

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