Using dart to download a file

Question

Can we use dart to upload a file?

For example in python

Answer 1

Shailen's answer is correct and may even be a little shorter with Stream.pipe .

 import 'dart:io'; main() { new HttpClient().getUrl(Uri.parse('http://example.com')) .then((HttpClientRequest request) => request.close()) .then((HttpClientResponse response) => response.pipe(new File('foo.txt').openWrite())); } 

Answer 2

I am using an HTTP package. If you want to download a file that is not huge, you can 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 work better for large files. Consider writing a helper function for this if you often have to download files.

Answer 3

The python example related to the question includes requesting the contents of example.com and writing the response to the file.

Here's how you can do something like this 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(); }); }); }); }