Download file in Dart/Flutter

download.dart

static var httpClient = new HttpClient();
Future<File> _downloadFile(String url, String filename) async {
  var request = await httpClient.getUrl(Uri.parse(url));
  var response = await request.close();
  var bytes = await consolidateHttpClientResponseBytes(response);
  String dir = (await getApplicationDocumentsDirectory()).path;
  File file = new File('$dir/$filename');
  await file.writeAsBytes(bytes);
  return file;
}

downloads_path_provider

i would not suggest downloads_path_provider because its build.gradle is set to compileSdkVersion 27 which results in build failures when creating signed apks. the issue page also is disabled so nobody could create a new issue and inform the author about it and it is currently archived since he said it has a lot of inconsistencies.

+1. I also found it always download failed in Android release build

Hello Guys, You can use the plugin I created to save file and download the same on web
File Saver

I found a way to download files in Flutter Web using html.AnchorElement().
I hope this sample code would be helpful :)

sample code is downloading file from Firebase Storage

Future<void> downloadFile(String imagePath) async {
    // 1) set url 
    String downloadURL = await firebaseStorage.FirebaseStorage.instance.ref(imagePath).getDownloadURL();
    // 2) request
    html.AnchorElement anchorElement = new html.AnchorElement(href: downloadURL);
    anchorElement.download = downloadURL;
    anchorElement.click();
  }

thanks

If, for example, I download 1 GB, it will read it all at once, and then I will write it correctly

Hello, I've created a plugin for this long time ago, file_saver