Update app.py

app.py

@@ -93,59 +93,65 @@ def download_audio(url, cookies_file_path=None):
     """Download audio from YouTube URL and return the file path"""
     if not YT_DLP_AVAILABLE:
         raise Exception("yt-dlp is not available. Please check the installation.")
-    
+
     try:
         # Create a temporary directory for downloads
         temp_dir = tempfile.mkdtemp()
         output_path = os.path.join(temp_dir, "audio")
-        
+
+        # Base yt-dlp options
         ydl_opts = {
             'format': 'bestaudio[ext=m4a]/bestaudio/best',
             'outtmpl': output_path + '.%(ext)s',
             'quiet': True,
             'no_warnings': True,
-            # Anti-bot detection measures
-            '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',
+            'force_ipv4': True,
             'referer': 'https://www.youtube.com/',
+            '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',
             'extractor_retries': 3,
             'fragment_retries': 3,
             'retry_sleep_functions': {'http': lambda n: 2 ** n},
         }
-        
+
         # Add cookies file if provided
         if cookies_file_path and os.path.exists(cookies_file_path):
+            print(f"✅ Using cookies file: {cookies_file_path}")
             ydl_opts['cookiefile'] = cookies_file_path
-            print(f"Using cookies file: {cookies_file_path}")
         else:
-            print("No cookies file provided - may encounter bot detection")
-            # Additional headers without cookies
-            ydl_opts.update({
-                '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',
-                    'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
-                    'Accept-Language': 'en-us,en;q=0.5',
-                    'Accept-Encoding': 'gzip,deflate',
-                    'DNT': '1',
-                    'Connection': 'keep-alive',
-                    'Upgrade-Insecure-Requests': '1',
-                }
-            })
-        
+            print("⚠️ No valid cookies file provided – likely to hit 403 Forbidden.")
+
+        # Extra headers to mimic real browser
+        ydl_opts['http_headers'] = {
+            'User-Agent': ydl_opts['user_agent'],
+            'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
+            'Accept-Language': 'en-US,en;q=0.5',
+            'Accept-Encoding': 'gzip, deflate',
+            'DNT': '1',
+            'Connection': 'keep-alive',
+            'Upgrade-Insecure-Requests': '1',
+            'Referer': 'https://www.youtube.com/',
+        }
+
+        print(f"🔧 yt-dlp options:\n{ydl_opts}")
+
         with YoutubeDL(ydl_opts) as ydl:
             info_dict = ydl.extract_info(url, download=True)
             filename = ydl.prepare_filename(info_dict)
-            
-            # Find the downloaded file
+
+            # Search for the downloaded audio file
             for ext in ['.m4a', '.webm', '.mp4', '.mp3']:
                 potential_file = output_path + ext
                 if os.path.exists(potential_file):
+                    print(f"✅ Audio file downloaded: {potential_file}")
                     return potential_file
-            
-            raise FileNotFoundError(f"Downloaded audio file not found")
-                
+
+            raise FileNotFoundError("Downloaded audio file not found.")
+
     except Exception as e:
+        import traceback
+        traceback.print_exc()  # For debugging
         if "403" in str(e) or "Forbidden" in str(e):
-            raise Exception(f"YouTube blocked the request (403 Forbidden). Please upload your cookies.txt file to bypass bot detection. Original error: {str(e)}")
+            raise Exception(f"YouTube blocked the request (403 Forbidden). Please upload a valid cookies.txt file. Original error: {str(e)}")
         else:
             raise Exception(f"Failed to download audio: {str(e)}")