add validation

serve/gradio_web_server.py

@@ -114,6 +114,12 @@ def clear_history(request: gr.Request):
 
 def add_text(state, text, image, image_process_mode, request: gr.Request):
     # logger.info(f"add_text. ip: {request.client.host}. len: {len(text)}")
+    if not text:
+        raise gr.Error("Please provide a prompt.")
+
+    if not image:
+        raise gr.Error("Please provide an image.")
+
     if len(text) <= 0 and image is None:
         state.skip_next = True
         return (state, state.to_gradio_chatbot(), "", None) + (no_change_btn,) * 5