beer_repository.dart

import 'package:http/http.dart' as http;
import 'dart:convert';
import '../models/beer.dart';
  
Future<Stream<Beer>> getBeers() async {
 final String url = 'https://api.punkapi.com/v2/beers';

 final client = new http.Client();
 final streamedRest = await client.send(
   http.Request('get', Uri.parse(url))
 );

 return streamedRest.stream
     .transform(utf8.decoder)
     .transform(json.decoder)
     .expand((data) => (data as List))
     .map((data) => Beer.fromJSON(data));
}