模块不存在:news

                $config = self::init($module);

                // 模块请求缓存检查
                $request->cache(
                    $config['request_cache'],
                    $config['request_cache_expire'],
                    $config['request_cache_except']
                );
            } else {
                throw new HttpException(404, 'module not exists:' . $module);
            }
        } else {
            // 单一模块部署
            $module = '';
            $request->module($module);
        }

        // 设置默认过滤机制
        $request->filter($config['default_filter']);