12_14 과제하면서 배운점

Stopwatch사용방법

printDownloadInfo(Future<Uint8List> function) async {
  print('다운로드 시작');
  var stopWatch = Stopwatch()..start(); //Stopwatch 사용방법
  Uint8List downloadFile = await function;
  stopWatch.stop();
  print('다운로드 끝');
  print('=========');
  print('소요시간 : ${stopWatch.elapsed}');
  saveFile(downloadFile, 'icon.ico');
  print('용량 : ${downloadFile.lengthInBytes}bytes');
}

.bodyBytes

Future<Uint8List> downloadImage(String url) async {
  Uint8List data;
  try {
    var response = await http.get(Uri.parse(url));
    data = response.bodyBytes;
  } catch (e) {
    var file = File('lib/12_14/icon.ico');
    print('잘못된 요청입니다.');
    data = await file.readAsBytes();
  }
  return data;
}

api가 깨져서 올때

Future<List<Stores>> getStores() async {
  var url = Uri.parse('http://104.198.248.76:3000/mask');
  var response = await http.get(url);
  var responseBytes = utf8.decode(response.bodyBytes); // .bodyBytes를 사용해서 한번 거쳐주면 된다.
  var json = jsonDecode(responseBytes);
  List<dynamic> stores = json['stores'];
  var data = stores.map((e) => Stores.fromJson(e)).toList();
  return data;
}