Suite API

Sources/dafl_project_flutter/lib/api/api.dart

@@ -13,6 +13,7 @@ class Api {
   get redirectUri => 'https://daflmusic.000webhostapp.com/callback/';
   final _scopes = 'user-read-playback-state user-read-currently-playing';
   String? _state;
+  String? _codeChallenge;
   String? _encodedLogs;
   final _tokenType = 'Bearer ';
 
@@ -27,9 +28,11 @@ class Api {
   Uri? _urlAuthorize;
   get urlAuthorize => _urlAuthorize;
   DateTime? _tokenEnd;
+  Random rng = Random();
 
   Api() {
-    _state = _generateRandomString();
+    _state = _generateRandomString(16);
+    _codeChallenge = _generateRandomString(rng.nextInt(85) + 43);
     _encodedLogs = base64.encode(utf8.encode("$_clientId:$_clientSecret"));
     _urlAuthorize = Uri.https('accounts.spotify.com', 'authorize', {
       'client_id': _clientId,
@@ -37,15 +40,19 @@ class Api {
       'redirect_uri': redirectUri,
       'state': _state,
       'scope': _scopes,
-      'show_dialog': 'true'
+      'show_dialog': 'false',
+      'code_challenge_method': 'S256',
+      'code_challenge': _codeChallenge
     });
   }
 
-  // for state value
-  String _generateRandomString() {
-    var r = Random();
-    return String.fromCharCodes(
-        List.generate(16, (index) => r.nextInt(33) + 89));
+  //random string generation
+
+  String _generateRandomString(int length) {
+    const chars =
+        'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz1234567890_.-~';
+    return String.fromCharCodes(Iterable.generate(
+        length, (_) => chars.codeUnitAt(rng.nextInt(chars.length))));
   }
 
   //session management
@@ -108,7 +115,6 @@ class Api {
       'Authorization': '$_tokenType $token',
       'Content-Type': 'application/json'
     });
-    print(response.statusCode);
     var decodedResponse = jsonDecode(utf8.decode(response.bodyBytes)) as Map;
     return decodedResponse['item']['id'];
   }

Sources/dafl_project_flutter/lib/api/in_app_browser.dart

@@ -1,8 +1,9 @@
 import 'dart:io';
-import 'package:dafl_project_flutter/api/track.dart';
 import 'package:dafl_project_flutter/main.dart';
 import 'package:flutter_inappwebview/flutter_inappwebview.dart';
 
+import 'track.dart';
+
 class MyInAppBrowser extends InAppBrowser {
   var options = InAppBrowserClassOptions(
       crossPlatform:
@@ -26,6 +27,9 @@ class MyInAppBrowser extends InAppBrowser {
   Future onLoadStart(url) async {
     if (url!.origin + url.path == MyApp.api.redirectUri) {
       await MyApp.api.requestUserAuthorization(url);
+      /*String id = await MyApp.api.getCurrentlyPlayingTrack();
+      Track track = await MyApp.api.getTrackInfo(id);
+      print('${track.artist} ${track.name} ${track.albumImage}');*/
       close();
     }
   }

Sources/dafl_project_flutter/pubspec.lock

@@ -268,6 +268,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "6.0.4"
+  random_string:
+    dependency: "direct main"
+    description:
+      name: random_string
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.3.1"
   rive:
     dependency: "direct main"
     description:

Sources/dafl_project_flutter/pubspec.yaml

@@ -22,6 +22,7 @@ dependencies:
   vibration: ^1.7.6
   flutter_inappwebview: ^5.7.1
   http: ^0.13.5
+  random_string: ^2.3.1
 
 dev_dependencies:
   flutter_test: