add validation

serve/gradio_web_server.py

@@ -114,10 +114,13 @@ 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)}")
+    print(text, image)
     if not text:
+        print("text empty")
         raise gr.Error("Please provide a prompt.")
 
     if not image:
+        print("image not provided")
         raise gr.Error("Please provide an image.")
 
     if len(text) <= 0 and image is None: