Update app.py

app.py

@@ -239,9 +239,12 @@ class AdvancedRAG:
         if hasattr(self, 'vector_store_id'):
             self.vector_store_id = None
         try:
-            # Create a new file
-            with tempfile.NamedTemporaryFile(delete=False, suffix=os.path.splitext(file.name)[1]) as tmp:
-                tmp.write(file.read())
+            # file is a bytes object, so assign a default name and extension
+            if not file:
+                raise Exception("No file uploaded.")
+            filename = 'uploaded_file.pdf'  # Default extension, or infer from UI if needed
+            with tempfile.NamedTemporaryFile(delete=False, suffix=os.path.splitext(filename)[1]) as tmp:
+                tmp.write(file)
                 tmp.flush()
                 with open(tmp.name, "rb") as file_obj:
                     file_obj = openai.files.create(