Update app.py

app.py

@@ -212,10 +212,17 @@ class AdvancedRAG:
 
     def upload_document(self, file) -> str:
         try:
+            if file is None:
+                raise ValueError("No file provided")
+
             # Create a new file
             with tempfile.NamedTemporaryFile(delete=False, suffix=os.path.splitext(file.name)[1]) as tmp:
-                tmp.write(file.read())
+                # Write the file content to the temporary file
+                with open(file.name, 'rb') as f:
+                    tmp.write(f.read())
                 tmp.flush()
+                
+                # Upload the file to OpenAI
                 with open(tmp.name, "rb") as file_obj:
                     file_obj = openai.files.create(
                         file=file_obj,
@@ -237,6 +244,13 @@ class AdvancedRAG:
             return file_obj.id
         except Exception as e:
             raise Exception(f"Error uploading document: {str(e)}")
+        finally:
+            # Clean up temporary file
+            if 'tmp' in locals():
+                try:
+                    os.unlink(tmp.name)
+                except:
+                    pass
 
     def ask_question(self, question: str) -> str:
         try: