HTTP Cache Flutter

Overview

The goal of this library is to make it easier for us to handle http requests and data caching by using interactive widgets. If you need any update or tutorial, please create an issue (here)https://github.com/nggepe/http_cache_flutter/issues

HttpCache Widget class

More complete HttpCache Widget documentation is here

Storage Initialization

Before implement this library, you should initialize the storage. In your main.dart flutter file 👇🏻

import 'package:http_cache_flutter/http_cache_flutter.dart';
import 'package:path_provider/path_provider.dart';
import 'package:flutter/material.dart';
import 'package:flutter/foundation.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await HttpCache.init(
      storageDirectory: kIsWeb
          ? HttpCacheStorage.webStorageDirectory
          : await getTemporaryDirectory());
  runApp(const MyApp());
}

More complete HttpCache Widget documentation is here

Clear Storage

HttpCache.storage.clear();

How to remove cache?

You can use string pattern to remove your some url group

HttpCache.storage.invalidate("https://example.com");

Usage Example

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:http_cache_flutter/http_cache_flutter.dart';
import 'package:path_provider/path_provider.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await HttpCache.init(
      storageDirectory: kIsWeb
          ? HttpCacheStorage.webStorageDirectory
          : await getTemporaryDirectory());
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

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

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  final url = "https://api.github.com/search/repositories?q=";
  @override
  Widget build(BuildContext context) {
    return HttpCache<List<GithubRepository>>(
        url: "${url}nggepe/http_cache_flutter",
        log: const HttpLog(showLog: true),
        refactorBody: (body, decodedBody) {
          var items = decodedBody['items'] as List?;
          return items?.map((e) {
                return GithubRepository.fromMap(e);
              }).toList() ??
              [];
        },
        builder: (_, data) {
          return Scaffold(
            appBar: AppBar(
              title: Text(widget.title),
              bottom: PreferredSize(
                  child: Padding(
                    padding: const EdgeInsets.symmetric(horizontal: 16),
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: [
                        TextButton(
                          onPressed: () {
                            data.changeUrl("${url}flutter/flutter");
                          },
                          child: const Text(
                            "flutter/flutter",
                            style: TextStyle(color: Colors.white),
                          ),
                          style: ButtonStyle(
                              backgroundColor:
                                  MaterialStateProperty.resolveWith(
                            (states) => Colors.green,
                          )),
                        ),
                        const SizedBox(width: 20),
                        TextButton(
                          onPressed: () {
                            data.changeUrl("${url}flutter/engine");
                          },
                          child: const Text(
                            "flutter/engine",
                            style: TextStyle(color: Colors.white),
                          ),
                          style: ButtonStyle(
                              backgroundColor:
                                  MaterialStateProperty.resolveWith(
                            (states) => Colors.green,
                          )),
                        ),
                      ],
                    ),
                  ),
                  preferredSize: Size(MediaQuery.of(context).size.width, 50)),
            ),
            body: Center(
              child: data.isLoading
                  ? const CircularProgressIndicator()
                  : ListView(
                      children: [
                        Column(
                          children: data.refactoredBody
                                  ?.map(
                                    (e) => Padding(
                                      padding: const EdgeInsets.symmetric(
                                          vertical: 16, horizontal: 8),
                                      child: Column(
                                        children: [
                                          Text(e.name),
                                          Text(e.fullName),
                                        ],
                                      ),
                                    ),
                                  )
                                  .toList() ??
                              [],
                        ),
                        TextButton(
                            onPressed: data.fetchWithLoading,
                            child: const Text('fetch')),
                      ],
                    ),
            ),
            floatingActionButton: FloatingActionButton(
                onPressed: data.fetchWithLoading,
                child: const Icon(Icons.refresh)),
          );
        });
  }
}

class GithubRepository {
  final String nodeId;
  final String name;
  final String fullName;

  const GithubRepository(
      {required this.nodeId, required this.name, required this.fullName});

  factory GithubRepository.fromMap(Map<String, dynamic> map) {
    return GithubRepository(
      nodeId: map['node_id'],
      name: map['name'],
      fullName: map['full_name'],
    );
  }
}

Update Coming Soon

HttpCachePaged Widget