fix: xREL Cache (6h), 429-Retry, 600ms Pause zwischen Requests

backend/src/tools/media/routes.js

@@ -88,6 +88,22 @@ function enrichMovie(movie, genreMap, fsk, rank) {
   };
 }
 
+// ── xREL Cache ───────────────────────────────────────────────────────────────
+// In-Memory Cache für xREL Ergebnisse – vermeidet Rate-Limits bei wiederholten Abfragen
+const xrelCache = new Map(); // key → { value, expiresAt }
+const CACHE_TTL = 6 * 60 * 60 * 1000; // 6 Stunden
+
+function cacheGet(key) {
+  const entry = xrelCache.get(key);
+  if (!entry) return undefined;
+  if (Date.now() > entry.expiresAt) { xrelCache.delete(key); return undefined; }
+  return entry.value;
+}
+
+function cacheSet(key, value) {
+  xrelCache.set(key, { value, expiresAt: Date.now() + CACHE_TTL });
+}
+
 // ── xREL Helper ───────────────────────────────────────────────────────────────
 
 async function xrelFetch(path, params = {}, timeoutMs = 7000) {
@@ -97,25 +113,42 @@ async function xrelFetch(path, params = {}, timeoutMs = 7000) {
     headers: { Accept: 'application/json' },
     signal: AbortSignal.timeout(timeoutMs),
   });
+  if (res.status === 429) {
+    // Rate-Limit: Retry-After Header auslesen oder 10s warten
+    const retryAfter = parseInt(res.headers.get('Retry-After') || '10');
+    await new Promise(r => setTimeout(r, retryAfter * 1000));
+    // Nochmal versuchen
+    const res2 = await fetch(url.toString(), {
+      headers: { Accept: 'application/json' },
+      signal: AbortSignal.timeout(timeoutMs),
+    });
+    if (!res2.ok) throw new Error(`xREL ${res2.status}`);
+    return res2.json();
+  }
   if (!res.ok) throw new Error(`xREL ${res.status}`);
   return res.json();
 }
 
 // Findet ext_info_id: sucht original + deutsch parallel, nimmt ersten Treffer
 async function findExtInfoId(title, originalTitle) {
+  const cacheKey = `extinfo:${originalTitle || title}`;
+  const cached = cacheGet(cacheKey);
+  if (cached !== undefined) return cached;
+
   const queries = [originalTitle, title]
     .filter(Boolean)
     .filter((v, i, a) => a.indexOf(v) === i);
 
-  // Alle Queries parallel starten
-  const results = await Promise.all(queries.map(async q => {
+  for (const q of queries) {
     try {
       const data = await xrelFetch('/search/ext_info.json', { q, type: 'movie', limit: 5 }, 5000);
       const hits = Array.isArray(data.results) ? data.results : [];
-      return hits.find(h => h.type === 'movie')?.id || null;
-    } catch (_) { return null; }
-  }));
-  return results.find(id => id != null) || null;
+      const id = hits.find(h => h.type === 'movie')?.id || null;
+      if (id) { cacheSet(cacheKey, id); return id; }
+    } catch (_) {}
+  }
+  cacheSet(cacheKey, null);
+  return null;
 }
 
 // Holt alle deutschen Releases für eine ext_info_id – Scene + P2P parallel
@@ -215,11 +248,18 @@ router.get('/movie/:id', authenticate, async (req, res) => {
     const fsk    = extractFSK(detail.release_dates);
     const imdbId = extIds.imdb_id || detail.imdb_id || null;
 
-    // xREL: findExtInfoId + getGermanReleasesById sequenziell aber mit kürzerem Timeout
+    // xREL: aus Cache oder frisch laden
     let xrel = [];
     try {
-      const extInfoId = await findExtInfoId(detail.title, detail.original_title);
-      if (extInfoId) xrel = await getGermanReleasesById(extInfoId);
+      const xrelCacheKey = `releases:${detail.original_title || detail.title}`;
+      const cachedXrel = cacheGet(xrelCacheKey);
+      if (cachedXrel !== undefined) {
+        xrel = cachedXrel;
+      } else {
+        const extInfoId = await findExtInfoId(detail.title, detail.original_title);
+        if (extInfoId) xrel = await getGermanReleasesById(extInfoId);
+        cacheSet(xrelCacheKey, xrel);
+      }
     } catch (_) {}
 
     res.json({
@@ -246,27 +286,36 @@ router.get('/movie/:id', authenticate, async (req, res) => {
 });
 
 // POST /api/tools/media/xrel-check – Check ob deutsche Releases existieren
-// Filme EINZELN sequenziell prüfen um xREL Rate-Limit zu respektieren
+// Sequenziell + Cache – Rate-Limit-sicher
 router.post('/xrel-check', authenticate, async (req, res) => {
   const movies = (req.body.movies || []).slice(0, 5);
   if (!movies.length) return res.json({});
 
   const result = {};
   for (const m of movies) {
+    const cacheKey = `hasde:${m.original_title || m.title}`;
+    const cached = cacheGet(cacheKey);
+    if (cached !== undefined) {
+      result[m.id] = cached;
+      continue;
+    }
     try {
       const extInfoId = await findExtInfoId(m.title, m.original_title);
-      if (!extInfoId) { result[m.id] = false; continue; }
-      // P2P zuerst – main_lang ist zuverlässig
+      if (!extInfoId) { cacheSet(cacheKey, false); result[m.id] = false; continue; }
+      // P2P zuerst
       const p2p = await xrelFetch('/p2p/releases.json', { ext_info_id: extInfoId, per_page: 25 }, 8000);
-      if ((p2p.list || []).some(r => r.main_lang === 'german')) { result[m.id] = true; continue; }
+      if ((p2p.list || []).some(r => r.main_lang === 'german')) {
+        cacheSet(cacheKey, true); result[m.id] = true; continue;
+      }
       // Scene als Fallback
       const scene = await xrelFetch('/release/ext_info.json', { id: extInfoId, per_page: 25 }, 8000);
-      result[m.id] = (scene.list || []).some(r => /german|deutsch/i.test(r.dirname || ''));
+      const found = (scene.list || []).some(r => /german|deutsch/i.test(r.dirname || ''));
+      cacheSet(cacheKey, found); result[m.id] = found;
     } catch (_) {
       result[m.id] = false;
     }
-    // Kurze Pause zwischen Filmen – xREL Rate-Limit
-    await new Promise(r => setTimeout(r, 400));
+    // Pause zwischen unkacheid Requests
+    await new Promise(r => setTimeout(r, 600));
   }
   res.json(result);
 });

frontend/src/tools/media.jsx

@@ -280,6 +280,7 @@ function KinoGrid({ onOpenModal }) {
           const hits = Object.entries(result).filter(([,v]) => v).map(([k]) => Number(k));
           if (hits.length > 0) setXrelIds(prev => new Set([...prev, ...hits]));
         } catch (_) {}
+        await new Promise(r => setTimeout(r, 800));
       }
     })();
     return () => { cancelled = true; };
@@ -349,6 +350,7 @@ function DemnächstGrid({ onOpenModal }) {
           const hits = Object.entries(result).filter(([,v]) => v).map(([k]) => Number(k));
           if (hits.length > 0) setXrelIds(prev => new Set([...prev, ...hits]));
         } catch (_) {}
+        await new Promise(r => setTimeout(r, 800));
       }
     })();
     return () => { cancelled = true; };