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fix: code-review #2 — dedup MagicBytes, auth für check_corrupted, UI-Flag, merged player streams, jq-JSON

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Dustin
2026-08-01 16:48:45 +02:00
parent 2d4c7c8b98
commit f00fd445f5
5 changed files with 57 additions and 90 deletions
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lib/services/download_service.dart
+2 -44
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@@ -6,6 +6,7 @@ import 'package:http/http.dart' as http;
import 'package:path_provider/path_provider.dart';
import '../models/song.dart';
import '../database/db_helper.dart';
import '../utils/audio_validator.dart';
import 'melo_logger.dart';
import '../config/app_config.dart';
@@ -268,7 +269,7 @@ class DownloadService extends ChangeNotifier {
await file.writeAsBytes(mp3Antwort.bodyBytes);
// ── Magic-Byte-Prüfung: Echte MP3-Datei? ──
istKorrupt = !_hatValideMagicBytes(file);
istKorrupt = !hatValideMagicBytes(file);
if (istKorrupt) {
debugPrint('⚠️ Korrupte Datei erkannt (Magic Bytes): $dateiPfad');
MeloLogger().fehler('magic_bytes_check', 'Ungültiger MP3-Header in $dateiPfad');
@@ -336,49 +337,6 @@ class DownloadService extends ChangeNotifier {
}
}
/// Prüft die Magic Bytes einer Audiodatei.
/// MP3: ID3-Tag (49 44 33) oder MPEG-Frame (FF FB, FF FA, FF F3, FF F2)
/// M4A/AAC: ftyp-Box (66 74 79 70)
/// FLAC: fLaC (66 4C 61 43)
/// WAV: RIFF (52 49 46 46)
/// OGG: OggS (4F 67 67 53)
static bool _hatValideMagicBytes(File file) {
try {
if (!file.existsSync()) return false;
final bytes = file.readAsBytesSync().take(16).toList();
if (bytes.length < 4) return false;
// ID3v2 Tag (MP3 mit Metadaten) — Bytes: 49 44 33
if (bytes[0] == 0x49 && bytes[1] == 0x44 && bytes[2] == 0x33) return true;
// MP3 ohne ID3: MPEG Audio Frame Sync (FF FB, FF FA, FF F3, FF F2)
if (bytes[0] == 0xFF && (bytes[1] & 0xFE) == 0xFA) return true; // MPEG v1
if (bytes[0] == 0xFF && bytes[1] == 0xF3) return true; // MPEG v2 / v2.5
if (bytes[0] == 0xFF && bytes[1] == 0xF2) return true; // MPEG v2 / v2.5
// M4A/AAC: ftyp-Box
if (bytes.length >= 8 &&
bytes[4] == 0x66 && bytes[5] == 0x74 &&
bytes[6] == 0x79 && bytes[7] == 0x70) return true;
// FLAC: fLaC
if (bytes[0] == 0x66 && bytes[1] == 0x4C &&
bytes[2] == 0x61 && bytes[3] == 0x43) return true;
// WAV: RIFF
if (bytes[0] == 0x52 && bytes[1] == 0x49 &&
bytes[2] == 0x46 && bytes[3] == 0x46) return true;
// OGG: OggS
if (bytes[0] == 0x4F && bytes[1] == 0x67 &&
bytes[2] == 0x67 && bytes[3] == 0x53) return true;
return false;
} catch (_) {
return false;
}
}
/// HTTP POST mit Retry (exponentieller Backoff)
Future<http.Response> _retryHttpPost(
Uri url, {
lib/services/musik_scanner.dart
+2 -32
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@@ -5,6 +5,7 @@ import 'package:path_provider/path_provider.dart';
import 'package:permission_handler/permission_handler.dart';
import '../models/song.dart';
import '../database/db_helper.dart';
import '../utils/audio_validator.dart';
import 'id3_reader.dart';
import 'melo_logger.dart';
@@ -52,7 +53,7 @@ class MusikScanner {
final tags = Id3Reader.lesen(pfad);
// ── Magic-Byte-Prüfung ──
final istKorrupt = !_hatValideMagicBytes(pfad);
final istKorrupt = !hatValideMagicBytes(file);
if (istKorrupt) {
MeloLogger().fehler('magic_bytes_scan', 'Ungültiger Audio-Header: $pfad');
}
@@ -192,37 +193,6 @@ class MusikScanner {
}
}
static bool _hatValideMagicBytes(String pfad) {
try {
final file = File(pfad);
if (!file.existsSync()) return false;
final bytes = file.readAsBytesSync().take(16).toList();
if (bytes.length < 4) return false;
// ID3v2 Tag (MP3) — 49 44 33
if (bytes[0] == 0x49 && bytes[1] == 0x44 && bytes[2] == 0x33) return true;
// MPEG Audio Frame Sync
if (bytes[0] == 0xFF && (bytes[1] & 0xFE) == 0xFA) return true;
if (bytes[0] == 0xFF && (bytes[1] == 0xF3 || bytes[1] == 0xF2)) return true;
// M4A/AAC
if (bytes.length >= 8 && bytes[4] == 0x66 && bytes[5] == 0x74 &&
bytes[6] == 0x79 && bytes[7] == 0x70) return true;
// FLAC
if (bytes[0] == 0x66 && bytes[1] == 0x4C &&
bytes[2] == 0x61 && bytes[3] == 0x43) return true;
// WAV
if (bytes[0] == 0x52 && bytes[1] == 0x49 &&
bytes[2] == 0x46 && bytes[3] == 0x46) { return true; }
// OGG
if (bytes[0] == 0x4F && bytes[1] == 0x67 &&
bytes[2] == 0x67 && bytes[3] == 0x53) { return true; }
return false;
} catch (_) {
return false;
}
}
String _dateiNameOhneEndung(String pfad) {
final name = pfad.split('/').last;
final dot = name.lastIndexOf('.');
lib/services/player_service.dart
+1 -11
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@@ -15,7 +15,6 @@ class PlayerService {
final List<Song> _warteschlange = [];
int _aktuellerIndex = -1;
StreamSubscription<PlayerState>? _autoNextSub;
StreamSubscription<PlayerState>? _fehlerSub;
AudioPlayer get _p {
if (_player == null) {
@@ -23,14 +22,7 @@ class PlayerService {
_autoNextSub = _player!.playerStateStream.listen((state) {
if (state.processingState == ProcessingState.completed) {
naechstes();
}
});
// ── Playback-Fehler abfangen → Song als korrupt markieren ──
_fehlerSub = _player!.playerStateStream.listen((state) {
if (state.processingState == ProcessingState.completed) return; // bereits behandelt
// PlayerState hat kein explizites "failure"-Feld, aber wir prüfen ob
// die Quelle nicht geladen werden konnte (idle nach Fehlversuch)
if (state.processingState == ProcessingState.idle &&
} else if (state.processingState == ProcessingState.idle &&
_aktuellerIndex >= 0 &&
_aktuellerIndex < _warteschlange.length) {
final song = _warteschlange[_aktuellerIndex];
@@ -39,7 +31,6 @@ class PlayerService {
_markiereAlsKorrupt(song);
}
}
});
}
return _player!;
}
@@ -122,7 +113,6 @@ class PlayerService {
void dispose() {
_autoNextSub?.cancel();
_fehlerSub?.cancel();
_player?.dispose();
_player = null;
_songWechsel.close();