fix(playback): use stream instead of chunked serving of audio bytes

lib/pages/library/user_local_tracks/local_folder.dart

@@ -198,7 +198,7 @@ class LocalLibraryPage extends HookConsumerWidget {
                       ),
                     );
 
-                    if (accepted ?? false) return;
+                    if (accepted != true) return;
 
                     final cacheDir = Directory(
                       await UserPreferencesNotifier.getMusicCacheDir(),
@@ -207,6 +207,8 @@ class LocalLibraryPage extends HookConsumerWidget {
                     if (cacheDir.existsSync()) {
                       await cacheDir.delete(recursive: true);
                     }
+
+                    ref.invalidate(localTracksProvider);
                   },
                 ),
                 IconButton.outline(

lib/provider/audio_player/state.dart

@@ -51,15 +51,17 @@ class AudioPlayerState with _$AudioPlayerState {
   }
 
   bool containsTrack(SpotubeTrackObject track) {
-    return tracks.any(
+    return tracks.isNotEmpty &&
-      (t) => t is SpotubeLocalTrackObject && track is SpotubeLocalTrackObject
+        tracks.any(
+          (t) =>
+              t is SpotubeLocalTrackObject && track is SpotubeLocalTrackObject
                   ? t.path == track.path
                   : t.id == track.id,
         );
   }
 
   bool containsTracks(List<SpotubeTrackObject> tracks) {
-    return tracks.every(containsTrack);
+    return this.tracks.isNotEmpty && tracks.every(containsTrack);
   }
 
   bool containsCollection(String collectionId) {

lib/provider/server/routes/playback.dart

@@ -1,3 +1,4 @@
+import 'dart:async';
 import 'dart:io';
 import 'dart:math';
 
@@ -124,8 +125,7 @@ class ServerPlaybackRoutes {
     return res;
   }
 
-  Future<({dio_lib.Response<Uint8List> response, Uint8List? bytes})>
+  Future<dio_lib.Response> streamTrack(
-      streamTrack(
     Request request,
     SourcedTrack track,
     Map<String, dynamic> headers,
@@ -141,30 +141,29 @@ class ServerPlaybackRoutes {
       final bytes = await trackCacheFile.readAsBytes();
       final cachedFileLength = bytes.length;
 
-      return (
+      return dio_lib.Response<Uint8List>(
-        response: dio_lib.Response<Uint8List>(
         statusCode: 200,
         headers: Headers.fromMap({
           "content-type": ["audio/${track.qualityPreset!.name}"],
-            "content-length": ["$cachedFileLength"],
+          "content-length": ["${cachedFileLength - 1}"],
           "accept-ranges": ["bytes"],
-            "content-range": ["bytes 0-$cachedFileLength/$cachedFileLength"],
+          "content-range": [
+            "bytes 0-${cachedFileLength - 1}/$cachedFileLength"
+          ],
+          "connection": ["close"],
         }),
         requestOptions: RequestOptions(path: request.requestedUri.toString()),
-        ),
+        data: bytes,
-        bytes: bytes,
       );
     }
 
-    final trackPartialCacheFile = File("${trackCacheFile.path}.part");
-
     String url = track.url ??
         await ref
             .read(sourcedTrackProvider(track.query).notifier)
             .swapWithNextSibling()
             .then((track) => track.url!);
 
-    var options = Options(
+    final options = Options(
       headers: {
         ...headers,
         "user-agent": _randomUserAgent,
@@ -172,12 +171,15 @@ class ServerPlaybackRoutes {
         "Connection": "keep-alive",
         "host": Uri.parse(url).host,
       },
-      responseType: ResponseType.bytes,
+      responseType: ResponseType.stream,
       validateStatus: (status) => status! < 400,
     );
 
     final contentLengthRes = await Future<dio_lib.Response?>.value(
-      dio.head(url, options: options),
+      dio.head(
+        url,
+        options: options.copyWith(responseType: ResponseType.bytes),
+      ),
     ).catchError((e, stack) async {
       AppLogger.reportError(e, stack);
 
@@ -193,8 +195,7 @@ class ServerPlaybackRoutes {
     // Redirect to m3u8 link directly as it handles range requests internally
     if (contentLengthRes?.headers.value("content-type") ==
         "application/vnd.apple.mpegurl") {
-      return (
+      return dio_lib.Response<Uint8List>(
-        response: dio_lib.Response<Uint8List>(
         statusCode: 301,
         statusMessage: "M3U8 Redirect",
         headers: Headers.fromMap({
@@ -203,29 +204,10 @@ class ServerPlaybackRoutes {
         }),
         requestOptions: RequestOptions(path: request.requestedUri.toString()),
         isRedirect: true,
-        ),
-        bytes: null,
       );
     }
 
-    if (headers["range"] == "bytes=0-" &&
+    final res = await dio.get<ResponseBody>(url, options: options);
-        track.qualityPreset is SpotubeAudioSourceContainerPresetLossless) {
-      const bufferSize = 6 * 1024 * 1024; // 6MB for lossless
-
-      final endRange = min(
-        bufferSize,
-        int.parse(contentLengthRes?.headers.value("content-length") ?? "0"),
-      );
-
-      options = options.copyWith(
-        headers: {
-          ...?options.headers,
-          "range": "bytes=0-$endRange",
-        },
-      );
-    }
-
-    final res = await dio.get<Uint8List>(url, options: options);
 
     AppLogger.log.i(
       "Response for track: ${track.query.name}\n"
@@ -233,49 +215,43 @@ class ServerPlaybackRoutes {
       "Headers: ${res.headers.map}",
     );
 
-    final bytes = res.data;
+    if (!userPreferences.cacheMusic) {
-
+      return res;
-    if (bytes == null || !userPreferences.cacheMusic) {
-      return (response: res, bytes: bytes);
     }
 
-    final contentRange =
+    final resStream = res.data!.stream.asBroadcastStream();
-        ContentRangeHeader.parse(res.headers.value("content-range") ?? "");
 
+    final trackPartialCacheFile = File("${trackCacheFile.path}.part");
     if (!await trackPartialCacheFile.exists()) {
       await trackPartialCacheFile.create(recursive: true);
     }
 
     // Write the stream to the file based on the range
-    final partialCacheFile =
+    final partialCacheFileSink =
-        await trackPartialCacheFile.open(mode: FileMode.writeOnlyAppend);
+        trackPartialCacheFile.openWrite(mode: FileMode.writeOnlyAppend);
-    int fileLength = 0;
+    final contentRange = res.headers.value("content-range") != null
-    try {
+        ? ContentRangeHeader.parse(res.headers.value("content-range") ?? "")
-      await partialCacheFile.setPosition(contentRange.start);
+        : ContentRangeHeader(0, 0, 0);
-      await partialCacheFile.writeFrom(bytes);
+
-      fileLength = await partialCacheFile.length();
+    resStream.listen(
-    } finally {
+      (data) {
-      await partialCacheFile.close();
+        partialCacheFileSink.add(data);
-    }
+      },
+      onError: (e, stack) {
+        partialCacheFileSink.close();
+      },
+      onDone: () async {
+        await partialCacheFileSink.close();
+
+        final fileLength = await trackPartialCacheFile.length();
+        if (fileLength != contentRange.total) return;
 
-    if (fileLength == contentRange.total) {
         await trackPartialCacheFile.rename(trackCacheFile.path);
-    }
 
-    if (contentRange.total == fileLength &&
+        if (track.qualityPreset!.getFileExtension() == "weba") return;
-        track.qualityPreset!.getFileExtension() != "weba") {
-      final playlistTrack = playlist.tracks.firstWhereOrNull(
-        (element) => element.id == track.query.id,
-      );
-      if (playlistTrack == null) {
-        AppLogger.log.e(
-          "Track ${track.query.id} not found in playlist, cannot write metadata.",
-        );
-        return (response: res, bytes: bytes);
-      }
 
         final imageBytes = await ServiceUtils.downloadImage(
-        (playlistTrack.album.images).asUrlString(
+          track.query.album.images.asUrlString(
             placeholder: ImagePlaceholder.albumArt,
             index: 1,
           ),
@@ -283,16 +259,20 @@ class ServerPlaybackRoutes {
 
         await MetadataGod.writeMetadata(
           file: trackCacheFile.path,
-        metadata: (playlistTrack as SpotubeFullTrackObject).toMetadata(
+          metadata: track.query.toMetadata(
             imageBytes: imageBytes,
             fileLength: fileLength,
           ),
         ).catchError((e, stackTrace) {
           AppLogger.reportError(e, stackTrace);
         });
-    }
+      },
+      cancelOnError: true,
+    );
 
-    return (bytes: bytes, response: res);
+    res.data?.stream =
+        resStream; // To avoid Stream has been already listened to exception
+    return res;
   }
 
   /// @head('/stream/<trackId>')
@@ -328,15 +308,23 @@ class ServerPlaybackRoutes {
         return Response.notFound("Track not found in the current queue");
       }
 
-      final (bytes: audioBytes, response: res) = await streamTrack(
+      final res = await streamTrack(
         request,
         sourcedTrack,
         request.headers,
       );
 
+      if (res.data is ResponseBody) {
         return Response(
           res.statusCode!,
-        body: audioBytes,
+          body: (res.data as ResponseBody).stream,
+          headers: res.headers.map,
+        );
+      }
+
+      return Response(
+        res.statusCode!,
+        body: res.data,
         headers: res.headers.map,
       );
     } catch (e, stack) {

pubspec.lock

@@ -992,13 +992,14 @@ packages:
     source: hosted
     version: "9.2.4"
   flutter_secure_storage_linux:
-    dependency: transitive
+    dependency: "direct overridden"
     description:
-      name: flutter_secure_storage_linux
+      path: flutter_secure_storage_linux
-      sha256: be76c1d24a97d0b98f8b54bce6b481a380a6590df992d0098f868ad54dc8f688
+      ref: patch-2
-      url: "https://pub.dev"
+      resolved-ref: f076cbb65b075afd6e3b648122987a67306dc298
-    source: hosted
+      url: "https://github.com/m-berto/flutter_secure_storage.git"
-    version: "1.2.3"
+    source: git
+    version: "2.0.1"
   flutter_secure_storage_macos:
     dependency: transitive
     description:
@@ -1008,13 +1009,13 @@ packages:
     source: hosted
     version: "3.1.3"
   flutter_secure_storage_platform_interface:
-    dependency: transitive
+    dependency: "direct overridden"
     description:
       name: flutter_secure_storage_platform_interface
-      sha256: cf91ad32ce5adef6fba4d736a542baca9daf3beac4db2d04be350b87f69ac4a8
+      sha256: b8337d3d52e429e6c0a7710e38cf9742a3bb05844bd927450eb94f80c11ef85d
       url: "https://pub.dev"
     source: hosted
-    version: "1.1.2"
+    version: "2.0.0"
   flutter_secure_storage_web:
     dependency: transitive
     description:

pubspec.yaml

@@ -185,6 +185,12 @@ dependency_overrides:
   flutter_svg: ^2.0.17
   intl: any
   collection: any
+  flutter_secure_storage_platform_interface: 2.0.0
+  flutter_secure_storage_linux:
+    git:
+      url: https://github.com/m-berto/flutter_secure_storage.git
+      ref: patch-2
+      path: flutter_secure_storage_linux
 
 flutter:
   generate: true