CODEWITHSUNDEEP
androidflutterasynchronousdart
questionasker
questionasker

Reputation: 2697

Flutter: How to try catch process after few seconds

I Have function like below:

  Future getArticles() async {
    try {
      _loadingArticleController.sink.add(true);
      Response response;
      var dio = ApiProvider.dio();

      response = await dio.get("/article/get-random-lang?category=1&lang=${translations.currentLanguage}");
      var data = response.data['data'];
      print(data);
      articleList.clear();
      if (response.statusCode == 200) {

        for (int i = 0; i < data.length; i++) {
          model = articleFromJson(json.encode(data[i]));
          articleList.add(model);
        }

        // sink to the stream
        _articlesController.sink.add(articleList);
        _loadingArticleController.sink.add(false);
        await Storage.storeArticles(data);
      }
      else
      {
        throw new DioError(
          response: Response(
            statusCode: response.data['status'], 
            data: {
              'message': response.data['message']
            }
          )
        );
      }
    }
    on DioError catch (e) {
      var articles = await Storage.getArticles();
      if (articles.length > 0) {
        articleList.clear();
        for (int i = 0; i < articles.length; i++) {
          Article model = await compute(articleFromJson, json.encode(articles[i]));
          articleList.add(model);
        }
        _articlesController.sink.add(articleList);
      } else {
        _articlesController.sink.add([]);
      }
      _loadingArticleController.sink.add(false);

      // The request was made and the server responded with a status code
      // that falls out of the range of 2xx and is also not 304.
      if (e.response != null) {
        print(e.response);
        print(e.response.headers);
        print(e.response.request);
        
      } else {
        // Something happen
        print(e);
      }
    } 
  }

In above function i have an anticipation, if function become error then take data from storage. However, I dont know how to using try catch if timeout occurs, let's says for 10 seconds.

any idea?

Thank You In Advance

Upvotes: 0

Views: 299

Answers (1)

Marcel Dz
Marcel Dz

Reputation: 2714

I have an idea, you could create a timer which is going to be 10 seconds and put the function inside your try block. Now if the 10 seconds are done and you want your function to be interrupted, you can cancel it by just return noting in the function and call cancelTimer to break it.

Timer _timer;
  _startTimer() {
    _cancelTimer();
    _timer = Timer.periodic(Duration(seconds: 10), (timer) {
      _cancelTimer();
    });
  }

  _cancelTimer() {
    _timer?.cancel();
  }

Upvotes: 1

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