nawalhmw

//this code belongs to https://fluttercompletereference.com/
//Chapter 17: Advanced HTTP
//******************************************************************************

  void main() => runApp(DemoApp());

  class DemoApp extends StatelessWidget {
    const DemoApp();

    @override

nawalhmw

//this code belongs to https://fluttercompletereference.com/
//Chapter 17: Files Download
//****************************************************************************** 

class DownloadWidget extends StatelessWidget {
    final String url = "https://website.com/files/something.pdf";
    const DownloadWidget();

    @override
    Widget build(BuildContext context) {

nawalhmw

//this code belongs to https://fluttercompletereference.com/
//Chapter 17: Files Download
//******************************************************************************  

class DownloadProgress with ChangeNotifier {

    double get progress => _progress;

    void start({ required String url,  required String localPath}) async {
      // Reset in case it isn't at zero

nawalhmw

//this code belongs to https://fluttercompletereference.com/
//Chapter 17: Files Download
//******************************************************************************

  void main() => runApp(DemoApp());

  class DemoApp extends StatelessWidget {
    const DemoApp();

    @override

nawalhmw

//this code belongs to https://fluttercompletereference.com/
//Chapter 17: HTTP Requests
//******************************************************************************


  class ErrorItemWidget extends StatelessWidget {
    const ErrorItemWidget();

    @override
    Widget build(BuildContext context) {

nawalhmw

//this code belongs to https://fluttercompletereference.com/
//Chapter 17: HTTP Requests
//******************************************************************************

  class SuccessItemWidget extends StatelessWidget {
    final Item? data;
    const SuccessItemWidget(this.data);

    @override
    Widget build(BuildContext context) {

nawalhmw

//this code belongs to https://fluttercompletereference.com/
//Chapter 17: HTTP Requests
//******************************************************************************


  class HTTPWidget extends StatefulWidget {
    final HTTPRequest<Item> _request;
    const HTTPWidget(this._request);

    @override

nawalhmw

//this code belongs to https://fluttercompletereference.com/
//Chapter 17: HTTP Requests
//******************************************************************************


  class RequestItem implements HTTPRequest<Item> {
    final String url;
    const RequestItem({ required this.url });

    Future<Item> execute() async {

nawalhmw

//this code belongs to https://fluttercompletereference.com/
//Chapter 17: HTTP Requests
//******************************************************************************

  abstract class HTTPRequest<T> {
    Future<T> execute();
  }

nawalhmw

//this code belongs to https://fluttercompletereference.com/
//Chapter 17: HTTP Requests
//******************************************************************************

  class Item {
    final int id;
    final String title;
    Item({
      required this.id,
      required this.title