http_client_helper 2.0.1

A Flutter plugin for http request with cancel and retry fuctions.

example/lib/main.dart

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:http_client_helper/http_client_helper.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with 'flutter run'. You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // 'hot reload' (press 'r' in the console where you ran 'flutter run',
        // or press Run > Flutter Hot Reload in IntelliJ). Notice that the
        // counter didn't reset back to zero; the application is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'http client helper'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key key, this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked 'final'.

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  CancellationToken cancellationToken;
  String msg = '';

  Future<void> request() async {
    final Uri url = Uri.parse('https://api.tuchong.com/feed-app');
    //url = 'https://google.com';
    setState(() {
      msg = 'begin request';
    });
    cancellationToken = CancellationToken();
    try {
      await HttpClientHelper.get(
        url,
        cancelToken: cancellationToken,
        timeRetry: const Duration(milliseconds: 100),
        retries: 3,
        timeLimit: const Duration(seconds: 5),
      ).then((Response response) {
        setState(() {
          msg = response.body;
        });
      });
    } on TimeoutException catch (_) {
      setState(() {
        msg = 'TimeoutException';
      });
    } on OperationCanceledError catch (_) {
      setState(() {
        msg = 'cancel';
      });
    } catch (e) {
      setState(() {
        msg = '$e';
      });
    }
  }

  void cancel() {
    cancellationToken?.cancel();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          // Here we take the value from the MyHomePage object that was created by
          // the App.build method, and use it to set our appbar title.
          title: Text(widget.title),
        ),
        body: Column(
          children: <Widget>[
            Row(
              mainAxisAlignment: MainAxisAlignment.spaceBetween,
              children: <Widget>[
                FlatButton(
                    onPressed: () {
                      request();
                    },
                    child: const Text('Requset')),
                FlatButton(
                    onPressed: () {
                      cancel();
                    },
                    child: const Text('Cancel'))
              ],
            ),
            Expanded(
              child: Text(msg),
            )
          ],
        ));
  }
}