我有一个文本文件，每行是一个单词编码base64 separely。现在我想解码它。我正在尝试使用base64命令行，但是我只能在一行中获取所有单词，我想要每行一个。
例如，我的文件是：
Y2F0Cg==
ZG9nCg==
aG91c2UK
我想要结果：
dog
cat
house
但我得到了：
dogcathouse
我认为xargs可以提供帮助，但我没有明白这一点。
答案 0 :(得分：12)
将base64 --decode与循环一起使用：
$ while IFS= read -r line; do echo "$line" | base64 --decode; done < file
cat
dog
house
答案 1 :(得分：4)
这适用于我base64 8.13：
base64 --decode test.txt
无需拆分文件。你使用的是哪个版本？
答案 2 :(得分：0)
你可以使用Python（不需要阅读每一行）：
python -m base64 -d foo.txt
答案 3 :(得分：0)
您可以为此使用bash此处文档import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
class PassAccount {
static String dropdownValue;
}
class ToContainer extends StatefulWidget {
final PassAccount dropdownValue;
ToContainer({Key key, this.dropdownValue}) : super(key: key);
@override
_ToContainerState createState() => _ToContainerState();
}
class _ToContainerState extends State<ToContainer> {
//var AccountSelected = PassAccount.dropdownValue;
@override
Widget build(BuildContext context) {
var AccountSelected = PassAccount.dropdownValue;
return Container(
color: Colors.white,
child: Column(
children: <Widget>[
Container(
padding: EdgeInsets.only(
top: 5.0, left: 10.0, right: 10.0, bottom: 10.0),
child: SafeArea(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Row(
children: <Widget>[
Expanded(
child: CupertinoButton(
child: Text(
'Next',
//style: style.clickButton,
),
onPressed: () {
var route = new MaterialPageRoute(
builder: (BuildContext context) =>
new DirectedScreen(
value: PassData(
account: AccountSelected,
)),
);
Navigator.of(context).push(route);
},
color: Colors.blue[600],
borderRadius: BorderRadius.circular(200.0),
disabledColor: Colors.grey,
),
),
],
),
],
),
),
),
],
),
);
}
}
class PassData {
final String account;
const PassData({this.account});
}
class DirectedScreen extends StatefulWidget {
final PassData value;
DirectedScreen({Key key, this.value}) : super(key: key);
@override
_DirectedScreenState createState() => _DirectedScreenState();
}
class _DirectedScreenState extends State<DirectedScreen> {
@override
Widget build(BuildContext context) {
return Scaffold(
backgroundColor: Colors.white,
appBar: AppBar(
title: Text('Transfer Summary'),
),
body: Container(
child: new Center(
child: Column(
children: <Widget>[
Padding(
child: new Text(
'PASSED VALUES',
style: new TextStyle(
fontWeight: FontWeight.bold, fontSize: 20.0),
textAlign: TextAlign.center,
),
padding: EdgeInsets.only(bottom: 20.0),
),
Padding(
child: new Text(
'Bank : ${widget.value.account}',
style: new TextStyle(fontWeight: FontWeight.bold),
textAlign: TextAlign.left,
),
padding: EdgeInsets.all(10.0),
),
],
),
),
),
);
}
}
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
@override
void initState() {
PassAccount.dropdownValue = "456";
super.initState();
}
void _incrementCounter() {
PassAccount.dropdownValue = "789";
setState(() {
_counter++;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
ToContainer(),
Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headline4,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}
。
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