diff --git a/ad_interface_tornado.py b/ad_interface_tornado.py
index 33621fc..9acb42d 100644
--- a/ad_interface_tornado.py
+++ b/ad_interface_tornado.py
@@ -95,9 +95,14 @@ class DispatchHandler(tornado.web.RequestHandler):
 
 
 	def _selfGetAdList(self):
-		input = json.loads(self.get_query_argument('body'))
-		gameid = input['gameid']
-		locationid = input['locationid']
+		try:
+			input = json.loads(self.get_query_argument('body'))
+			gameid = input['gameid']
+			locationid = input['locationid']
+		except Exception as e:
+			result = {'errcode': 2, "errmsg": e}
+			self.write(result)
+
 		key = f"{gameid}::{locationid}"
 		ids = my_redis.smembers(key)
 		info = []