Update app.py

app.py

@@ -153,12 +153,11 @@ async def download(task_id: str):
     if task_id not in tasks or tasks[task_id]["status"] != "completed":
         return {"error": "File not ready"}
     
-    # Hugging Face reverse proxy buffering ko explicit bypass karne ke liye headers
+    # Hugging Face reverse proxy buffer layer bypass headers
     headers = {
         "X-Accel-Buffering": "no",
         "Cache-Control": "no-cache, no-store, must-revalidate",
-        "Pragma": "no-cache",
-        "Expires": "0"
+        "Pragma": "no-cache"
     }
     return FileResponse(
         tasks[task_id]["file_path"], 
@@ -175,10 +174,10 @@ async def stream(task_id: str, request: Request):
     file_size = os.path.getsize(file_path)
     range_header = request.headers.get("Range")
     
-    # Fast output transfer ke liye chunk size 1MB se 4MB ke beech hona chahiye (Overhead kam karne ke liye)
+    # OUTPUT DATA PIPELINE UNLOCK: User download chunk size badhakar 2MB kar diya hai taaki throughput fast ho sake
     STREAM_CHUNK_SIZE = 2 * 1024 * 1024  
     
-    # Common performance headers jo proxy networks ko instantaneous routing ke liye force karte hain
+    # Proxy bypass headers to stop network-side buffering during transmission
     base_headers = {
         "X-Accel-Buffering": "no",
         "Cache-Control": "no-cache, no-store, must-revalidate",