386 lines
18 KiB
JavaScript
386 lines
18 KiB
JavaScript
/**
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* NovaSonic Backend Server
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* Downloads music via yt-dlp / squid.wtf (Qobuz) and saves into your Navidrome library.
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*
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* Requirements:
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* - Node.js 18+
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* - yt-dlp installed (https://github.com/yt-dlp/yt-dlp)
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* - ffmpeg installed
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*/
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const express = require('express');
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const { execSync } = require('child_process');
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const path = require('path');
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const fs = require('fs');
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const https = require('https');
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const CONFIG = require('./lib/config');
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const { jobs, updateJob, log } = require('./lib/jobs');
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const { lookupItunesTrackMeta, fetchItunesTracks, searchItunesAlbumTracks } = require('./lib/metadata');
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const { downloadTrack, downloadAlbumTracks } = require('./lib/downloader');
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// ─── INIT ─────────────────────────────────────────────────────────────────────
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const app = express();
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app.use((req, res, next) => {
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res.setHeader('Access-Control-Allow-Origin', '*');
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res.setHeader('Access-Control-Allow-Methods', 'GET,POST,PATCH,DELETE,OPTIONS');
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res.setHeader('Access-Control-Allow-Headers', 'Content-Type,Authorization,X-ABS-URL,X-ABS-Token');
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res.setHeader('Access-Control-Allow-Private-Network', 'true');
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if (req.method === 'OPTIONS') { res.sendStatus(204); return; }
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next();
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});
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app.use(express.json());
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let ytdlpVersion = 'unknown';
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try {
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ytdlpVersion = execSync(`${CONFIG.ytdlpBin} --version`, { timeout: 5000 }).toString().trim();
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console.log(`✅ yt-dlp ${ytdlpVersion} found`);
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} catch {
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console.warn('⚠️ yt-dlp not found!');
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}
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if (!fs.existsSync(CONFIG.musicPath)) {
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console.warn(`⚠️ Music path "${CONFIG.musicPath}" does not exist — creating it`);
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fs.mkdirSync(CONFIG.musicPath, { recursive: true });
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}
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// ─── QUEUE ────────────────────────────────────────────────────────────────────
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let activeDownloads = 0;
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const downloadQueue = [];
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function processQueue() {
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if (activeDownloads >= CONFIG.maxParallel || downloadQueue.length === 0) return;
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const task = downloadQueue.shift();
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activeDownloads++;
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task().finally(() => { activeDownloads--; processQueue(); });
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}
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function enqueue(task) {
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downloadQueue.push(task);
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processQueue();
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}
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// ─── SPOTIFY ──────────────────────────────────────────────────────────────────
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function parseSpotifyUrl(url) {
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const m = url.match(/open\.spotify\.com\/(?:[a-z]{2,8}-[a-z]{2,8}\/)?(?:intl-[a-z-]+\/)?(track|album|playlist)\/([A-Za-z0-9]+)/);
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if (!m) throw new Error('Ungültige Spotify-URL — erwartet: open.spotify.com/track|album|playlist/...');
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return { type: m[1], id: m[2] };
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}
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// ─── ROUTES ──────────────────────────────────────────────────────────────────
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app.post('/api/spotify/track-artwork', async (req, res) => {
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const tracks = req.body.tracks || [];
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if (!tracks.length) return res.json({ results: [] });
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const CONC = 8;
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const results = [];
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for (let i = 0; i < tracks.length; i += CONC) {
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const batch = tracks.slice(i, i + CONC);
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const batchRes = await Promise.all(batch.map(async t => {
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const searchArtist = (t.artistName || '').split(/\s*[,/•]\s*/)[0].trim();
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const meta = await lookupItunesTrackMeta(searchArtist, t.trackName || '');
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return { idx: t.idx, artworkUrl: meta.artworkUrl || t.existingArt || '' };
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}));
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results.push(...batchRes);
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}
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res.json({ results });
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});
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// ─── ITUNES PROXY ─────────────────────────────────────────────────────────────
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// Browsers can't call itunes.apple.com directly (no CORS headers). Proxy it here.
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app.get('/api/itunes/:endpoint', (req, res) => {
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const allowed = new Set(['search', 'lookup']);
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if (!allowed.has(req.params.endpoint)) return res.status(404).json({ error: 'not found' });
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const qs = new URLSearchParams(req.query).toString();
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const target = `https://itunes.apple.com/${req.params.endpoint}${qs ? '?' + qs : ''}`;
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https.get(target, { headers: { 'User-Agent': 'NovaSonic/1.0' } }, upstream => {
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res.setHeader('Content-Type', 'application/json');
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upstream.pipe(res);
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}).on('error', e => res.status(502).json({ error: e.message }));
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});
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app.get('/api/health', (req, res) => {
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res.json({
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status: 'ok', ytdlpVersion,
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musicPath: CONFIG.musicPath,
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audioFormat: CONFIG.audioFmt,
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downloadBackend: CONFIG.downloadBackend,
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squidQuality: CONFIG.squidQuality,
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activeJobs: activeDownloads,
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queueLength: downloadQueue.length,
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spotify: { configured: true },
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});
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});
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async function _resolveSpotifyViaSpotdl(url) {
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const { execFile } = require('child_process');
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const scriptPath = path.join(__dirname, 'spotify_resolve.py');
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// Strip ?si= and other tracking params — spotdl doesn't handle them
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const cleanUrl = url.split('?')[0];
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return new Promise((resolve, reject) => {
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execFile('python3', [scriptPath, cleanUrl], { timeout: 90000, maxBuffer: 10 * 1024 * 1024 }, (err, stdout, stderr) => {
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if (stderr?.trim()) stderr.trim().split('\n').forEach(l => console.log('[py]', l));
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// Always try to parse stdout first — script outputs JSON even on error
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const out = stdout?.trim();
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if (out) {
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try {
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const data = JSON.parse(out);
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if (data.error === 'RATE_LIMITED') return reject(new Error(`RATE_LIMITED:${data.retryAfter || 30}`));
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if (data.error) return reject(new Error(`spotdl: ${data.error}`));
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return resolve(data);
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} catch { /* not JSON, fall through */ }
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}
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if (err) return reject(new Error(`spotdl exited ${err.code}: ${stderr?.trim() || out || err.message}`));
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reject(new Error(`spotdl: keine Ausgabe`));
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});
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});
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}
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// Tracks when the Spotify rate limit window expires so retries never reach Spotify.
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let _spRateLimitUntil = 0;
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app.post('/api/spotify/resolve', async (req, res) => {
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const { url } = req.body;
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if (!url) return res.status(400).json({ error: 'url required' });
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// Block retries until the cooldown the Spotify told us has actually elapsed.
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const now = Date.now();
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if (_spRateLimitUntil > now) {
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const secs = Math.ceil((_spRateLimitUntil - now) / 1000);
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console.log(`[spotify/resolve] cooldown active — ${secs}s remaining`);
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return res.status(429).json({ error: 'RATE_LIMITED', retryAfter: secs });
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}
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try {
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const { type, id } = parseSpotifyUrl(url);
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console.log(`[spotify/resolve] ${type} ${id}`);
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const timeout = new Promise((_, reject) =>
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setTimeout(() => reject(new Error('Zeitüberschreitung — Spotify API antwortet nicht (>120s)')), 120000)
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);
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const data = await Promise.race([_resolveSpotifyViaSpotdl(url), timeout]);
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res.json(data);
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} catch(e) {
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console.error('[spotify/resolve]', e.message);
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if (e.message.includes('403') && e.message.includes('/playlists/')) {
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return res.status(403).json({ error: 'EDITORIAL_PLAYLIST' });
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}
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if (e.message.startsWith('RATE_LIMITED:')) {
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const secs = parseInt(e.message.split(':')[1], 10) || 30;
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_spRateLimitUntil = Date.now() + secs * 1000;
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return res.status(429).json({ error: 'RATE_LIMITED', retryAfter: secs });
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}
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res.status(500).json({ error: e.message });
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}
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});
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app.post('/api/download', async (req, res) => {
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const { type, artist, title, album, artworkUrl, collectionId, jobId: clientJobId, explicit,
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trackNum: bodyTrackNum, totalTracks: bodyTotalTracks, discNum: bodyDiscNum, discTotal: bodyDiscTotal } = req.body;
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if (!artist || !title) return res.status(400).json({ error: 'artist and title required' });
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const jobId = clientJobId || ('job_' + Date.now());
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jobs.set(jobId, {
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id: jobId, type, artist, title, album,
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status: 'queued', progress: 0, message: 'In Warteschlange…',
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log: [], createdAt: Date.now(), updatedAt: Date.now(),
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});
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res.json({ jobId, status: 'queued' });
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enqueue(async () => {
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updateJob(jobId, { status: 'running', progress: 5, message: 'Gestartet…' });
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try {
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if (type === 'track') {
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const sp = req.body.tracks?.[0] || {};
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const spAlbum = sp.collectionName || album || '';
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const spArt = sp.artworkUrl100 || artworkUrl || '';
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const spYear = sp.releaseDate ? new Date(sp.releaseDate).getFullYear() : undefined;
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let meta = {
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album: spAlbum, year: spYear,
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trackNum: sp.trackNumber || bodyTrackNum || undefined,
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totalTracks: sp.trackCount || bodyTotalTracks || undefined,
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discNum: sp.discNumber || bodyDiscNum || undefined,
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discTotal: sp.discCount || bodyDiscTotal || undefined,
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artworkUrl: spArt, explicit: sp.trackExplicitness === 'explicit' || !!explicit,
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durationMs: sp.durationMs || undefined,
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};
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if (!meta.album) {
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const searchArtist = artist.split(',')[0].trim();
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log(jobId, '📋 Suche Album-Metadaten von iTunes…');
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const extra = await lookupItunesTrackMeta(searchArtist, title);
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if (extra.album) log(jobId, `📋 Album: "${extra.album}" (${extra.year || '?'})`);
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meta = { ...meta, ...extra, artworkUrl: spArt || extra.artworkUrl || '' };
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} else {
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log(jobId, `📋 Album aus Spotify: "${meta.album}"`);
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}
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const result = await downloadTrack({ jobId, artist, title, ...meta });
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if (result?.skipped) {
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updateJob(jobId, { status: 'done', progress: 100, message: 'Bereits vorhanden – übersprungen', skipped: true });
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} else {
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updateJob(jobId, { status: 'done', progress: 100, message: 'Fertig!' });
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}
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} else if (type === 'album') {
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let tracks = [];
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if (collectionId) {
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log(jobId, '📋 Lade Track-Liste von iTunes…');
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tracks = await fetchItunesTracks(collectionId);
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}
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if (!tracks.length) {
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log(jobId, '🔍 Suche Album auf iTunes…');
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tracks = await searchItunesAlbumTracks(artist, album || title);
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}
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if (!tracks.length) {
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throw new Error(`Keine einzelnen Tracks für "${album || title}" gefunden. Bitte über iTunes Global-Suche herunterladen.`);
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}
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const { done: dlDone, skipped: dlSkipped } = await downloadAlbumTracks({ jobId, artist, albumTitle: album || title, tracks, artworkUrl });
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const allSkipped = dlSkipped === tracks.length;
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const someSkipped = dlSkipped > 0 && !allSkipped;
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const msg = allSkipped
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? `Album bereits vorhanden – alle ${dlSkipped} Tracks übersprungen`
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: someSkipped
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? `Album fertig! (${dlDone} geladen, ${dlSkipped} bereits vorhanden)`
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: `Album "${album || title}" fertig!`;
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updateJob(jobId, { status: 'done', progress: 100, message: msg, skipped: allSkipped });
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} else if (type === 'artist') {
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log(jobId, `🎤 Künstler-Download: ${artist}`);
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const artistData = await new Promise((resolve, reject) => {
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https.get(`https://itunes.apple.com/search?term=${encodeURIComponent(artist)}&media=music&entity=album&limit=10&country=de`, res => {
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let d = ''; res.on('data', c => d += c);
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res.on('end', () => { try { resolve(JSON.parse(d).results || []); } catch { reject(new Error('parse')); } });
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}).on('error', reject);
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});
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const artistAlbums = artistData.filter(a => a.artistName?.toLowerCase() === artist.toLowerCase()).slice(0, 10);
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log(jobId, `📀 ${artistAlbums.length} Alben gefunden`);
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let done = 0;
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for (const alb of artistAlbums) {
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const tracks = await fetchItunesTracks(alb.collectionId).catch(() => []);
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if (tracks.length) {
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await downloadAlbumTracks({ jobId, artist, albumTitle: alb.collectionName, tracks, artworkUrl: alb.artworkUrl100 });
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}
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done++;
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updateJob(jobId, { progress: Math.round((done / artistAlbums.length) * 95) });
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}
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updateJob(jobId, { status: 'done', progress: 100, message: `Künstler "${artist}" fertig!` });
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} else if (type === 'playlist') {
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const plTracks = req.body.tracks || [];
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if (!plTracks.length) throw new Error('Keine Tracks übergeben');
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log(jobId, `🎵 Playlist "${title}" — ${plTracks.length} Tracks`);
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let done = 0, skipped = 0;
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const CONC = CONFIG.maxParallel || 2;
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for (let i = 0; i < plTracks.length; i += CONC) {
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const batch = plTracks.slice(i, i + CONC);
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const batchResults = await Promise.allSettled(batch.map(async track => {
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const trackTitle = track.trackName || '';
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const trackArtist = track.artistName || artist || '';
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// If the frontend already enriched this track with iTunes data (collectionName +
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// trackNumber + durationMs all present), skip the re-lookup to avoid a different
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// iTunes result overriding the already-correct enriched metadata.
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const alreadyEnriched = !!(track.collectionName && track.trackNumber && track.durationMs);
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let itunes = {};
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if (alreadyEnriched) {
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log(jobId, `📋 Frontend-Metadaten: "${trackArtist} – ${trackTitle}" (${track.collectionName})`);
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} else {
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const searchArtist = trackArtist.split(',')[0].trim();
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log(jobId, `📋 iTunes: "${trackArtist} – ${trackTitle}"`);
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itunes = await lookupItunesTrackMeta(searchArtist, trackTitle);
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}
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return downloadTrack({
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jobId,
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artist: trackArtist,
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albumArtist: trackArtist,
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title: trackTitle,
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album: itunes.album || track.collectionName || '',
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year: itunes.year || (track.releaseDate ? new Date(track.releaseDate).getFullYear() : undefined),
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trackNum: itunes.trackNum || track.trackNumber || undefined,
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totalTracks: itunes.totalTracks || undefined,
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genre: itunes.genre || track.primaryGenreName || undefined,
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artworkUrl: itunes.artworkUrl || track.artworkUrl100 || artworkUrl || '',
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explicit: track.trackExplicitness === 'explicit',
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durationMs: itunes.durationMs || track.durationMs || undefined,
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});
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}));
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for (let j = 0; j < batchResults.length; j++) {
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const r = batchResults[j];
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if (r.status === 'rejected') {
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log(jobId, `⚠️ Fehler bei "${batch[j].trackName || '?'}": ${r.reason?.message || r.reason}`);
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} else if (r.value?.skipped) {
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skipped++;
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} else {
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done++;
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}
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updateJob(jobId, { progress: Math.round(((done + skipped) / plTracks.length) * 90) });
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}
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}
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const allSkipped = skipped === plTracks.length;
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updateJob(jobId, {
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status: 'done', progress: 100, skipped: allSkipped,
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message: allSkipped
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? `Alle ${skipped} Tracks bereits vorhanden`
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: `Fertig! ${done} geladen${skipped ? `, ${skipped} übersprungen` : ''}`,
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});
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}
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} catch (err) {
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console.error(`[${jobId}] Error:`, err.message);
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updateJob(jobId, { status: 'error', message: err.message });
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}
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});
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});
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app.get('/api/status/:jobId', (req, res) => {
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const job = jobs.get(req.params.jobId);
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if (!job) return res.status(404).json({ error: 'Job not found' });
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res.json(job);
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});
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app.get('/api/jobs', (req, res) => {
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res.json(Array.from(jobs.values()).sort((a, b) => b.createdAt - a.createdAt).slice(0, 50));
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});
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// ─── ABS PROXY ───────────────────────────────────────────────────────────────
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// Forwards API calls to Audiobookshelf to avoid CORS restrictions in the browser.
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// The browser sends X-ABS-URL and X-ABS-Token headers; audio streaming uses
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// direct <audio src> URLs and is unaffected by CORS.
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app.all('/api/abs-proxy/*path', async (req, res) => {
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const absBase = req.headers['x-abs-url'];
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const absToken = req.headers['x-abs-token'];
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if (!absBase || !absToken) { res.status(400).json({ error: 'Missing X-ABS-URL or X-ABS-Token' }); return; }
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// Strip the proxy prefix to get the ABS path (e.g. /api/me, /api/libraries/…)
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const absPath = req.path.replace(/^\/api\/abs-proxy/, '');
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const qs = Object.keys(req.query).length ? '?' + new URLSearchParams(req.query).toString() : '';
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const url = `${absBase}${absPath}${qs}`;
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const fwdHeaders = { 'Authorization': `Bearer ${absToken}`, 'Content-Type': 'application/json' };
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const opts = { method: req.method, headers: fwdHeaders };
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if (req.method !== 'GET' && req.method !== 'HEAD' && req.body && Object.keys(req.body).length) {
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opts.body = JSON.stringify(req.body);
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}
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try {
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const upstream = await fetch(url, opts);
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const text = await upstream.text();
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res.status(upstream.status)
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.setHeader('Content-Type', upstream.headers.get('Content-Type') || 'application/json')
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.send(text);
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} catch (e) {
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res.status(502).json({ error: `ABS proxy error: ${e.message}` });
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}
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});
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// ─── START ────────────────────────────────────────────────────────────────────
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app.listen(CONFIG.port, () => {
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console.log(`\n🎵 NovaSonic Backend running on port ${CONFIG.port}`);
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console.log(` Music folder : ${CONFIG.musicPath}`);
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console.log(` Audio format : ${CONFIG.audioFmt} (quality ${CONFIG.audioQuality})`);
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console.log(` Download backend : ${CONFIG.downloadBackend}`);
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if (CONFIG.downloadBackend !== 'ytdlp') {
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console.log(` Squid quality : ${CONFIG.squidQuality}`);
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}
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console.log(` yt-dlp : ${ytdlpVersion}`);
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console.log('');
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});
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