bug fix

app.py

@@ -5,11 +5,11 @@ def echo(text, request: gr.Request):
     output_text = json.dumps({"text": text})
     if request:
         print("Request headers dictionary:", request.headers)
-        output_text = json.add({"headers": dict(request.headers)})
+        output_text.add({"headers": dict(request.headers)})
         print("IP address:", request.client.host)
-        output_text = json.add({"headers": dict(request.headers)})
+        output_text.add({"headers": dict(request.headers)})
         print("Query parameters:", dict(request.query_params))
-        output_text = json.add({"query_params": dict(request.query_params)})
+        output_text.add({"query_params": dict(request.query_params)})
     return output_text
 
 io = gr.Interface(echo, "textbox", "json").launch(share=True)