允许和控制缓存的最佳方式
Y慢
我正在使用雅虎的 YSlow 测试我的一些网站,并注意到以下评论:指定以下资源至少在未来一周到期
我的 .htacces 文件包含以下代码:
ExpiresActive On
ExpiresDefault "access plus 1 day"
这是最好的方法吗?为什么YSlow建议您设置缓存至少一周?
YSlow
I was testing some of my websites using Yahoo's YSlow and noticed the following comment:
Specify an expiration at least one week in the future for the following resources
My .htacces file contains the following code:
ExpiresActive On
ExpiresDefault "access plus 1 day"
Is this the best way to do it? And Why does YSlow advice you to set the cache for at least one week?
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因为他们认为一天还不够长(这不是一个坏主意):如果您有一些用户每周只访问您的网站几次,则缓存 1 天对他来说没有用。
相反,基本思想是永远缓存——并在修改文件时更改URL(通常更改文件名),以强制浏览下载新版本。
Because they consider (and it's not a bad idea) that one day is not quite long enough : if you have some user that comes to your website only a couple of times per week, a cache of 1 day will not be useful for him.
Instead, the basic idea is to cache forever -- and to change the URL (changing the name of the file, typically) when a file is modified, to force the browse to download the new version.