impoved request handeling for ISBN

Web/app.py

@@ -25,6 +25,7 @@ from werkzeug.routing import BuildError
 from jinja2 import TemplateNotFound
 import os
 import sys
+from bs4 import BeautifulSoup
 
 # Ensure imports work regardless of whether gunicorn starts in /app or /app/Web.
 _CURRENT_DIR = os.path.dirname(os.path.abspath(__file__))
@@ -9539,6 +9540,113 @@ def _fetch_from_open_library(clean_isbn):
         print(f"OpenLibrary Search error: {e}")
     return None
 
+def _fetch_from_isbn_de(clean_isbn):
+    """
+    Source 4: isbn.de (Web Scraping für deutsche Schulbücher)
+    Robuste Version mit Fallbacks für Meta-Tags und Tabellendaten.
+    """
+    try:
+        url = f"https://www.isbn.de/buch/{clean_isbn}"
+        headers = {
+            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36'
+        }
+        
+        response = requests.get(url, headers=headers, timeout=5)
+        
+        if response.status_code != 200:
+            return None
+            
+        soup = BeautifulSoup(response.text, 'html.parser')
+        
+        # 1. Titel prüfen
+        title_elem = soup.find('h1')
+        if not title_elem or "nicht gefunden" in title_elem.text.lower() or "Suche" in title_elem.text:
+            return None
+        title = title_elem.text.strip()
+
+        # --- Hilfsfunktion für unstrukturierte HTML-Tabellen ---
+        def get_detail_by_keyword(keywords):
+            """Sucht nach Schlagwörtern (z.B. 'Verlag') und gibt den angrenzenden Wert zurück."""
+            for tag in soup.find_all(['th', 'td', 'strong', 'b', 'span']):
+                text = tag.text.strip().lower()
+                if any(kw in text for kw in keywords):
+                    # Wenn es eine Tabellenzelle (th/td) ist, nimm das nächste Geschwister-Element
+                    if tag.name in ['th', 'td']:
+                        sibling = tag.find_next_sibling('td')
+                        if sibling:
+                            return sibling.text.strip()
+                    # Wenn es ein Label in einem Listen- oder Absatz-Element ist
+                    parent = tag.parent
+                    if parent and parent.name in ['li', 'p', 'div']:
+                        return parent.text.replace(tag.text, '').strip()
+            return None
+
+        # --- Hilfsfunktion für Schema.org (itemprop) ---
+        def get_itemprop(prop_name):
+            elem = soup.find(attrs={"itemprop": prop_name})
+            if elem:
+                return elem.get('content') or elem.text.strip()
+            return None
+
+        authors = get_itemprop("author")
+        if not authors:
+            authors = get_detail_by_keyword(['autor', 'herausgeber', 'von:'])
+        authors = authors if authors else "Unknown Author"
+
+        publisher = get_itemprop("publisher")
+        if not publisher:
+            publisher = get_detail_by_keyword(['verlag'])
+        publisher = publisher if publisher else "Unknown Publisher"
+
+        pub_date = get_itemprop("datePublished")
+        if not pub_date:
+            pub_date = get_detail_by_keyword(['erscheinungsjahr', 'erschienen', 'datum'])
+        pub_date = pub_date if pub_date else "Unknown Date"
+
+        page_count = get_itemprop("numberOfPages")
+        if not page_count:
+            page_count = get_detail_by_keyword(['seiten', 'umfang'])
+            
+        if page_count:
+            match = re.search(r'\d+', page_count)
+            page_count = match.group(0) if match else "Unknown"
+        else:
+            page_count = "Unknown"
+
+        description = get_itemprop("description")
+        if not description:
+            for class_name in ['description', 'zusammenfassung', 'klappentext', 'buch-beschreibung']:
+                fallback_desc = soup.find('div', class_=re.compile(class_name, re.IGNORECASE))
+                if fallback_desc:
+                    description = fallback_desc.text.strip()
+                    break
+        description = description if description else "Keine Beschreibung verfügbar"
+
+        thumbnail = ""
+        img_elem = soup.find('img', itemprop="image")
+        if not img_elem:
+            img_elem = soup.find('img', class_=lambda c: c and 'cover' in str(c).lower())
+            
+        if img_elem and 'src' in img_elem.attrs:
+            thumbnail = img_elem['src']
+            if thumbnail.startswith('/'):
+                thumbnail = "https://www.isbn.de" + thumbnail
+
+        return {
+            "title": title,
+            "authors": authors,
+            "publisher": publisher,
+            "publishedDate": pub_date,
+            "description": description,
+            "pageCount": page_count,
+            "price": None,
+            "thumbnail": thumbnail,
+            "source": "isbn-de"
+        }
+    except Exception as e:
+        print(f"isbn.de Scraping error: {e}")
+    return None
+
 @app.route('/fetch_book_info/<isbn>')
 def fetch_book_info(isbn):
     """
@@ -9562,6 +9670,7 @@ def fetch_book_info(isbn):
         providers = [
             _fetch_from_google_books,
             _fetch_from_lobid_germany,
+            _fetch_from_isbn_de,
             _fetch_from_open_library
         ]
 

Web/requirements.txt

@@ -15,3 +15,4 @@ openpyxl
 cryptography>=42.0.0
 pywebpush
 py-vapid>=1.9.0
+beautifulsoup4

Web/templates/license.html

@@ -28,11 +28,10 @@
             <li class="nav-item" role="presentation">
                 <button class="nav-link" id="tab-legal" data-bs-toggle="tab" data-bs-target="#pane-legal"
                     type="button" role="tab">Rechtsgrundlage</button>
-            </li>
         </ul>
 
         <!-- ── NOTICE ────────────────────────────────────────────────────── -->
-        <div class="tab-pane fade" id="pane-notice" role="tabpanel">
+        <div class="tab-pane" id="pane-notice" role="tabpanel">
         <div class="license-content">
             <h2>NOTICE – Urheberrechtliche Hinweise</h2>
             <p><strong>Invario Modul Suite</strong><br>Copyright © 2026 Invario UG</p>
@@ -59,14 +58,14 @@
 
             <h4>Frontend / Laufzeit-Assets</h4>
             <ul>
-                <li>html5-qrcode (MIT) © 2020-2025 Manoj Brahmbhatt (mebjas)</li>
+                <li>quagga2 (MIT) © 2014 Christoph Oberhofer, © 2019 Eric Blade and contributors</li>
             </ul>
             <hr>
         </div>
         </div><!-- /#pane-notice -->
 
         <!-- ── DATENSCHUTZ ───────────────────────────────────────────────── -->
-        <div class="tab-pane fade" id="pane-privacy" role="tabpanel">
+        <div class="tab-pane" id="pane-privacy" role="tabpanel">
         <div class="license-content">
             <h2>Datenschutzerklärung (Privacy Policy)</h2>
 
@@ -108,7 +107,7 @@
         </div><!-- /#pane-privacy -->
 
         <!-- ── SICHERHEIT ────────────────────────────────────────────────── -->
-        <div class="tab-pane fade" id="pane-security" role="tabpanel">
+        <div class="tab-pane" id="pane-security" role="tabpanel">
         <div class="license-content">
             <h2>Sicherheitsrichtlinie (Security Policy)</h2>
 
@@ -129,7 +128,7 @@
         </div><!-- /#pane-security -->
 
         <!-- ── DATENVERARBEITUNG ─────────────────────────────────────────── -->
-        <div class="tab-pane fade" id="pane-data" role="tabpanel">
+        <div class="tab-pane" id="pane-data" role="tabpanel">
         <div class="license-content">
             <h2>Dokumentation der Datenverarbeitung (VVT)</h2>
 
@@ -157,7 +156,7 @@
         </div><!-- /#pane-data -->
 
         <!-- ── RECHTSGRUNDLAGE ───────────────────────────────────────────── -->
-        <div class="tab-pane fade" id="pane-legal" role="tabpanel">
+        <div class="tab-pane" id="pane-legal" role="tabpanel">
         <div class="license-content">
             <h2>Rechtsgrundlage der Nutzung</h2>
             <p>Um das Inventarsystem DSGVO-konform zu betreiben, muss der Betreiber eine der folgenden Grundlagen festlegen:</p>
@@ -170,9 +169,6 @@
                     Einwilligung vorliegen (Art. 6 Abs. 1 lit. a DSGVO).</li>
             </ol>
         </div>
-        </div><!-- /#pane-legal -->
-
-        </div><!-- /.tab-content -->
     </div>
 </div>
 

requirements.txt

@@ -15,3 +15,4 @@ openpyxl
 cryptography>=42.0.0
 pywebpush
 py-vapid>=1.9.0
+beautifulsoup4