feat: add YoutubeParsingHelper for visitor data generation and update…

… client handling Don't ask what I'm doing.
gokadzev · Jan 28, 2025 · 6d14930 · 6d14930
1 parent 22e9ad3
commit 6d14930
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Showing 2 changed files with 109 additions and 6 deletions.
diff --git a/lib/API/musify.dart b/lib/API/musify.dart
@@ -35,6 +35,7 @@ import 'package:musify/services/lyrics_manager.dart';
 import 'package:musify/services/settings_manager.dart';
 import 'package:musify/utilities/flutter_toast.dart';
 import 'package:musify/utilities/formatter.dart';
+import 'package:musify/utilities/parsing_helper.dart';
 import 'package:path_provider/path_provider.dart';
 import 'package:youtube_explode_dart/youtube_explode_dart.dart';
 
@@ -63,11 +64,7 @@ Map activePlaylist = {
   'list': [],
 };
 
-List<YoutubeApiClient> userChosenClients = [
-  YoutubeApiClient.tv,
-  YoutubeApiClient.androidVr,
-  YoutubeApiClient.safari,
-];
+List<YoutubeApiClient> userChosenClients = [];
 
 dynamic nextRecommendedSong;
 
@@ -635,7 +632,7 @@ Future<AudioOnlyStreamInfo> getSongManifest(String songId) async {
   try {
     final manifest = await _yt.videos.streams.getManifest(
       songId,
-      ytClients: userChosenClients,
+      ytClients: userChosenClients.isEmpty ? [iosNew] : userChosenClients,
     );
     final audioStream = manifest.audioOnly.withHighestBitrate();
     return audioStream;

diff --git a/lib/utilities/parsing_helper.dart b/lib/utilities/parsing_helper.dart
@@ -0,0 +1,106 @@
+import 'dart:convert';
+import 'dart:math';
+
+import 'package:youtube_explode_dart/youtube_explode_dart.dart';
+
+var _visitorData = YoutubeParsingHelper.getRandomVisitorData();
+
+class YoutubeParsingHelper {
+  static const String _contentPlaybackNonceAlphabet =
+      'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_';
+
+  static String getRandomVisitorData() {
+    final random = Random();
+    final pbE2 = ProtoBuilder()
+      ..string(2, '')
+      ..varint(4, random.nextInt(255) + 1);
+
+    final pbE = ProtoBuilder()
+      ..string(1, 'US')
+      ..bytes(2, pbE2.toBytes());
+
+    final pb = ProtoBuilder()
+      ..string(
+        1,
+        _generateRandomStringFromAlphabet(
+          _contentPlaybackNonceAlphabet,
+          11,
+          random,
+        ),
+      )
+      ..varint(
+        5,
+        DateTime.now().millisecondsSinceEpoch ~/ 1000 - random.nextInt(600000),
+      )
+      ..bytes(6, pbE.toBytes());
+    return pb.toUrlencodedBase64();
+  }
+
+  static String _generateRandomStringFromAlphabet(
+    String alphabet,
+    int length,
+    Random random,
+  ) {
+    final sb = StringBuffer();
+    for (var i = 0; i < length; i++) {
+      sb.write(alphabet[random.nextInt(alphabet.length)]);
+    }
+    return sb.toString();
+  }
+}
+
+class ProtoBuilder {
+  final Map<int, dynamic> _fields = {};
+
+  void string(int fieldNumber, String value) {
+    _fields[fieldNumber] = value;
+  }
+
+  void varint(int fieldNumber, int value) {
+    _fields[fieldNumber] = value;
+  }
+
+  void bytes(int fieldNumber, List<int> value) {
+    _fields[fieldNumber] = value;
+  }
+
+  List<int> toBytes() {
+    final bytes = <int>[];
+    _fields.forEach((key, value) {
+      if (value is String) {
+        bytes.addAll(utf8.encode(value));
+      } else if (value is int) {
+        bytes.add(value);
+      } else if (value is List<int>) {
+        bytes.addAll(value);
+      }
+    });
+    return bytes;
+  }
+
+  String toUrlencodedBase64() {
+    final bytes = toBytes();
+    return base64Url.encode(bytes);
+  }
+}
+
+var iosNew = YoutubeApiClient(
+  {
+    'context': {
+      'client': {
+        'clientName': 'IOS',
+        'clientVersion': '19.45.4',
+        'deviceMake': 'Apple',
+        'deviceModel': 'iPhone16,2',
+        'hl': 'en',
+        'platform': 'MOBILE',
+        'osName': 'IOS',
+        'osVersion': '18.1.0.22B83',
+        'visitorData': _visitorData,
+      },
+      'gl': 'US',
+      'utcOffsetMinutes': 0,
+    },
+  },
+  'https://www.youtube.com/youtubei/v1/player?key=AIzaSyB-63vPrdThhKuerbB2N_l7Kwwcxj6yUAc&prettyPrint=false',
+);