aoepub_viewer 0.0.4 aoepub_viewer: ^0.0.4 copied to clipboard
An epub viewer flutter plugin project.
import 'dart:convert';
import 'dart:io';
import 'package:flutter/material.dart';
import 'package:aoepub_viewer/aoepub_viewer.dart';
import 'package:flutter/services.dart' show ByteData, rootBundle;
import 'package:path/path.dart';
import 'package:path_provider/path_provider.dart';
import 'package:encrypt/encrypt.dart' as encrypt;
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 simply save your changes to "hot reload" in a Flutter IDE).
// Notice that the counter didn't reset back to zero; the application
// is not restarted.
primarySwatch: Colors.blue,
// This makes the visual density adapt to the platform that you run
// the app on. For desktop platforms, the controls will be smaller and
// closer together (more dense) than on mobile platforms.
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage();
// 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".
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
String text = '';
void _incrementCounter(BuildContext context) {
setUpCrypt(context);
setState(() {
// This call to setState tells the Flutter framework that something has
// changed in this State, which causes it to rerun the build method below
// so that the display can reflect the updated values. If we changed
// _counter without calling setState(), then the build method would not be
// called again, and so nothing would appear to happen.
_counter++;
});
}
void setUpCrypt(BuildContext context) async {
Directory directory = await getApplicationDocumentsDirectory();
var dbPath = join(directory.path, "app");
ByteData data = await rootBundle.load("assets/testBase64.enc");
List<int> bytes =
data.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes);
await File(dbPath).writeAsBytes(bytes);
// final key = encrypt.Key.fromUtf8('44BZgdKgL2BZdxK144BZgdKgL2BZdxK1');
// final iv = encrypt.IV.fromUtf8('44BZgdKgL2BZdxK1');
// final encrypter = Encrypter(AES(key, mode: AESMode.cbc));
// final encrypted = encrypter.decryptBytes(encrypt.Encrypted(bytes), iv: iv);
// var tmpPath = join(directory.path, "decrypt.epub");
// await File(tmpPath).writeAsBytes(encrypted);
final tmpPath = await decryptFile(dbPath);
AoepubViewer.setConfig(
themeColor: Theme.of(context).errorColor,
identifier: "iosBook",
scrollDirection: EpubScrollDirection.ALLDIRECTIONS,
allowSharing: false,
enableTts: true,
);
AoepubViewer.open(tmpPath);
}
Future<String> decryptFile(filePath) async {
//'filePath' contains the php encrypted video file.
var encodedKey = 'NDRCWmdkS2dMMkJaZHhLMTQ0QlpnZEtnTDJCWmR4SzE=';
var encodedIv = 'NDRCWmdkS2dMMkJaZHhLMQ==';
var encryptedBase64EncodedString = new File(filePath).readAsStringSync();
var decoded = base64.decode(encryptedBase64EncodedString);
final key1 = encrypt.Key.fromBase64(encodedKey);
final iv = encrypt.IV.fromBase64(encodedIv);
final encrypter =
encrypt.Encrypter(encrypt.AES(key1, mode: encrypt.AESMode.cbc));
final decrypted =
encrypter.decryptBytes(encrypt.Encrypted(decoded), iv: iv);
final filename = '${basenameWithoutExtension(filePath)}.epub';
final directoryName = dirname(filePath);
final newFilePath = join(directoryName, filename);
var newFile = new File(newFilePath);
await newFile.writeAsBytes(decrypted);
return newFilePath;
}
@override
Widget build(BuildContext context) {
// This method is rerun every time setState is called, for instance as done
// by the _incrementCounter method above.
//
// The Flutter framework has been optimized to make rerunning build methods
// fast, so that you can just rebuild anything that needs updating rather
// than having to individually change instances of widgets.
return Scaffold(
appBar: AppBar(
// Here we take the value from the MyHomePage object that was created by
// the App.build method, and use it to set our appbar title.
title: Text('Title'),
),
body: Center(
// Center is a layout widget. It takes a single child and positions it
// in the middle of the parent.
child: Column(
// Column is also a layout widget. It takes a list of children and
// arranges them vertically. By default, it sizes itself to fit its
// children horizontally, and tries to be as tall as its parent.
//
// Invoke "debug painting" (press "p" in the console, choose the
// "Toggle Debug Paint" action from the Flutter Inspector in Android
// Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
// to see the wireframe for each widget.
//
// Column has various properties to control how it sizes itself and
// how it positions its children. Here we use mainAxisAlignment to
// center the children vertically; the main axis here is the vertical
// axis because Columns are vertical (the cross axis would be
// horizontal).
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'You have pushed the button this many times:',
),
Expanded(
child: Text(
'$text',
style: TextStyle(fontSize: 8),
),
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: () => _incrementCounter(context),
tooltip: 'Increment',
child: Icon(Icons.add),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}