bug fix

controllers/component.go

 					return
 				}
 
-				replay = &model.TaAutoReply{
-					MessageType:      models.MESSAGE_TYPE_PARAGRAPH,
-					MessageParagraph: replyText,
-					IsUse:            models.AUTOREPLY_IS_USE_ON,
+				if replyText != "" {
+					replay = &model.TaAutoReply{
+						MessageType:      models.MESSAGE_TYPE_PARAGRAPH,
+						MessageParagraph: replyText,
+						IsUse:            models.AUTOREPLY_IS_USE_ON,
+					}
 				}
 			}
 			break

service/wechat/wechat.go

 		return "", err
 	}
 
+	if res == nil {
+		return "", nil
+	}
+
 	return res.Value, nil
 }