update

routes/llm.py

@@ -128,10 +128,16 @@ async def chat_stream(
             stop=[],
         )
 
+        headers = {
+            "Content-Type": "text/event-stream",
+            "Cache-Control": "no-cache",
+            "Connection": "keep-alive",
+            "Access-Control-Allow-Origin": "*",
+        }
         return StreamingResponse(
             sse_generator(request, llm_api, system_prompt.text, predict_params, dataset_service, entity_service),
             media_type="text/event-stream",
-            headers={"Cache-Control": "no-cache", "Connection": "keep-alive"}
+            headers=headers
         )
     except Exception as e:
         logger.error(f"Error in SSE chat stream: {str(e)}", stack_info=True)