如何解决Flutter会从Google云端硬盘和一个硬盘中下载部分文件
Flutter无法从Google Drive或OneDrive,zip或其他方式下载文件。 这些文件只是部分下载,而来自网站等大多数其他链接的文件则完全下载。
例如,此Google云端硬盘链接将仅获得10%的文件下载,而小说的其他URL将获得100%
使用的包裹:
- http:^ 0.12.2
- dio:^ 3.0.10
- path_provider:^ 1.6.24
Google云端硬盘URL ='https://drive.google.com/file/d/1xnhT8mzMeU-wRemt1sNFR0DJt2MNmSC8/view?usp=sharing'; 古腾堡小说URL ='https://www.gutenberg.org/files/1342/1342-h.zip';
示例代码同时显示了链接和结果。
输出:
- 预期大小:myColorsDIO.zip:594,545,myColorsHTTP.zip:594,545, 1342DIO.zip:778512,1342HTTP.zip:778512
- 获得的尺寸: myColorsDIO.zip:63411,myColorsHTTP.zip:70677,1342DIO.zip:778512, 1342HTTP.zip:778512
请帮助。
import 'package:dio/dio.dart';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'package:path_provider/path_provider.dart';
import 'dart:io';
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(),);
}
}
class MyHomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text('Downloading Files'),body: Center(child: Text('Press the floating button to download files',floatingActionButton: FloatingActionButton(
onPressed: () { _downloadFile();},tooltip: 'Increment',child: Icon(Icons.add),// This trailing comma makes auto-formatting nicer for build methods.
);
}
Future<File> _downloadFile() async {
String myUrl = 'https://drive.google.com/file/d/1xnhT8mzMeU-wRemt1sNFR0DJt2MNmSC8/view?usp=sharing';
String my7ZIPUrl = 'https://www.gutenberg.org/files/1342/1342-h.zip';
String myDownloadDirectory = ((await getApplicationDocumentsDirectory()).path);
String myDownloadedGoogleFile1 = 'myColorsDIO.zip';
String myDownloadedGoogleFile2 = 'myColorsHTTP.zip';
String myDownloadedfromgutenberg1 = '1342DIO.zip';
String myDownloadedfromgutenberg2 = '1342HTTP.zip';
print('Download Directory: $myDownloadDirectory');
//Downloading Google Drive zip file via DIO
Dio dio = Dio();
await dio.download(
myUrl,'$myDownloadDirectory/$myDownloadedGoogleFile1',onReceiveProgress: (rcv,total) {print('received: ${rcv.toStringAsFixed(0)} out of total: ${total.toStringAsFixed(0)}');}
);
await dio.download(
my7ZIPUrl,'$myDownloadDirectory/$myDownloadedfromgutenberg1',total) {print('received: ${rcv.toStringAsFixed(0)} out of total: ${total.toStringAsFixed(0)}');}
);
//Downloading Google Drive zip file via HTTP
var req = await http.Client().get(Uri.parse(myUrl));
var file = File('$myDownloadDirectory/$myDownloadedGoogleFile2',);
file.writeAsBytes(req.bodyBytes);
//Downloading Google Drive zip file via HTTP
var req1 = await http.Client().get(Uri.parse(my7ZIPUrl));
var file1 = File('$myDownloadDirectory/$myDownloadedfromgutenberg2',);
file1.writeAsBytes(req1.bodyBytes);
print('Expected size: myColorsDIO.zip: 594,545,myColorsHTTP.zip: 594,1342DIO.zip: 778512,1342HTTP.zip: 778512');
print('myColorsDIO.zip: ${await File('$myDownloadDirectory/$myDownloadedGoogleFile1',).length()},myColorsHTTP.zip: ${await File('$myDownloadDirectory/$myDownloadedGoogleFile2',1342DIO.zip: ${await File('$myDownloadDirectory/$myDownloadedfromgutenberg1',1342HTTP.zip: ${await File('$myDownloadDirectory/$myDownloadedfromgutenberg2',).length()}');
return null;
}
}
解决方法
共享链接无法直接使用,将其放在浏览器中,当系统提示您进行下载时,即有效的URL。
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