Enhance HLS proxy functionality and improve caching mechanism

- Updated AGENTS.md to clarify dlp.py module usage and segment handling.
- Modified README.md to include ALLOW_LOCAL configuration for testing.
- Refactored app.py to streamline HLS proxy logic and improve error handling.
- Enhanced dlp.py to optimize caching and segment retrieval processes.
- Updated player.html to ensure proper JSON formatting for proxy URLs.
- Improved test_integration.py to validate HLS segment proxying and added test for Pornhub HLS extraction.
- Adjusted test_proxy.py to reflect changes in caching functions and data structure.

app.py

@@ -56,27 +56,27 @@ def hls_proxy():
         if not url_param:
             abort(400, description="Missing url parameter")
 
-        from urllib.parse import urlparse, unquote
+        from urllib.parse import unquote
         
         path = request.args.get("path", "")
-        
-        if ".m3u8" in url_param and not path:
-            video_url = url_param
-        elif ".m3u8" in url_param and path:
-            video_url = url_param
-        else:
-            video_url = url_param
-
-        video_url = unquote(video_url)
+        video_url = unquote(url_param)
 
         if not is_valid_url(video_url):
             abort(400, description="Invalid URL")
 
-        if path.endswith(".m3u8") or not path:
+        # Main playlist request - get from yt-dlp and rewrite URLs
+        if path == "index.m3u8" or path == "":
             playlist = dlp.get_hls_playlist(video_url)
             return Response(playlist, mimetype="application/vnd.apple.mpegurl")
         
+        # Sub-playlist or segment request - path is the absolute URL
         segment_data = dlp.get_hls_segment(video_url, path)
+        
+        if segment_data is None:
+            abort(500, description="Failed to fetch segment")
+        
+        if path.endswith(".m3u8"):
+            return Response(segment_data, mimetype="application/vnd.apple.mpegurl")
         return Response(segment_data, mimetype="video/mp2t")
     
     except HTTPException: