Why doesn't CHttpCacheFilter work?

Question

Yii

public function filters()
    {
        return array(
            array(
                'CHttpCacheFilter',
                'lastModified'=>1502700378,
            ),
        );
    }

In this case, it still returns 200. In this case, YII_DEBUG == false

Answer 1

This does not work if gzip compression is enabled on the server.

Answer 2

https://github.com/yiisoft/yii/issues/1192
Update to the latest version of yii 1.1.19 (June 8, 2017).