Using dart to download a file - dart

Question

Can we use dart to download a file?
For example in python

Answer 1

I'm using the HTTP package a lot. If you want to download a file that is not huge, you could use the HTTP package for a cleaner approach:
import 'package:http/http.dart' as http;
main() {
http.get(url).then((response) {
new File(path).writeAsBytes(response.bodyBytes);
});
}
What Alexandre wrote will perform better for larger files. Consider writing a helper function for that if you find the need for downloading files often.

Answer 2

Shailen's response is correct and can even be a little shorter with Stream.pipe.
import 'dart:io';
main() async {
final request = await HttpClient().getUrl(Uri.parse('http://example.com'));
final response = await request.close();
response.pipe(File('foo.txt').openWrite());
}

Answer 3

The python example linked to in the question involves requesting the contents of example.com and writing the response to a file.
Here is how you can do something similar in Dart:
import 'dart:io';
main() {
var url = Uri.parse('http://example.com');
var httpClient = new HttpClient();
httpClient.getUrl(url)
.then((HttpClientRequest request) {
return request.close();
})
.then((HttpClientResponse response) {
response.transform(new StringDecoder()).toList().then((data) {
var body = data.join('');
print(body);
var file = new File('foo.txt');
file.writeAsString(body).then((_) {
httpClient.close();
});
});
});
}

Answer 4

We can use http.readBytes(url).
await File(path).writeAsBytes(await http.readBytes('https://picsum.photos/200/300/?random'));

Answer 5

Yes, first of all you have to request to file url using http dart library like:
Response response = await get(Uri.parse(link));
after that your Response object (response) will get that file in self and you can simply write the response bytes to a file and that file will be your downloaded file.
as I open file like this:
File file = File('image.jpg')
then we have to send response bytes to this file like this:
file.writeAsBytes(response.bodyBytes);
now you have downloaded a image file successfully.. Congrates.
additional, for example let me show you a sample code to download a image file :
import 'dart:io';
import 'package:http/http.dart';
main(List<String> args) async {
var link =
"https://pps.whatsapp.net/v/t61.24694-
24/72779382_449683642563635_3243701117464346624_n.jpg?ccb=11-
4&oh=23e3bc2ce3f4940a70cb464494bbda76&oe=619B3B8C";
Response response = await get(Uri.parse(link));
File file = File('image.jpg');
file.writeAsBytes(response.bodyBytes);
}
look, this is the code and a file named image.jpg is downloaded at bottom in terminal view is our downloaded image.
screen shot
this is our actual image which we downloaded.
downloaded image