Flutter WEB download option

Question

I am making flutter web app that should generate a file from user data. And have the option to download the output file.

But I can not find any options/packages whic

Answer 1

I've found a solution that let me make an authorized request to get a file (with package http.dart) and then download the file using flutter web (with package dart:html). I don't know if someone other could need this, but I wasn't able to find a solution, so here is the code.

import 'package:http/http.dart';
import 'dart:html' as html;

...

var headers = {
   'Content-Type': 'application/octet-stream',
   'Accept': 'application/octet-stream',
   'Authorization' : 'Bearer [TOKEN HERE]'
};

Response res =
      await get(url, headers: headers); 

if (res.statusCode == 200) {
    final blob = html.Blob([res.bodyBytes]);
    final url = html.Url.createObjectUrlFromBlob(blob);
    final anchor = html.document.createElement('a') as html.AnchorElement
      ..href = url
      ..style.display = 'none'
      ..download = filename;
    html.document.body.children.add(anchor);

    anchor.click();

    html.document.body.children.remove(anchor);
    html.Url.revokeObjectUrl(url);
}