isolates_run_uint8_list_parser.dart

/// this class uses Isolates.run, only available after Dart 2.19, allowing in parallel obtaining a file in bytes 
/// then answering to its caller without blocking the UI
/// remember: when using isolates, the functions they call must be top level or static

import 'dart:isolate';

import 'package:flutter/foundation.dart';
import 'package:http/http.dart' as http;

Future<http.Response> _fileResponse(Uri uri) async {
  final response = await http.get(uri);

  return response;
}

class Uint8ListParser {
  Future<Uint8List> getAsUint8List(String url) async {
    final uri = Uri.parse(url);
    final response = await Isolate.run(() => _fileResponse(uri));

    return response.bodyBytes;
  }
}