本文介绍了HTTP中缓存控制标头的最大值的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在使用Amazon S3为我的网站提供静态资源。我想让浏览器尽可能长时间地缓存这些资产。我应该在资产中包含哪些元数据标题
I'm using Amazon S3 to serve static assets for my website. I want to have browsers cache these assets for as long as possible. What meta-data headers should I include with my assets
Cache-Control: max-age=???
推荐答案
通常建议将一年作为标准最大值。请参阅：
Generally one year is advised as a standard max value. See RFC 2616:
虽然这适用于较旧的到期标准，在没有任何明确的标准指导的情况下，适用于缓存控制也是有意义的。只要你通常需要它，并且选择任意更长的值可能会打破一些用户代理。所以：
Although that applies to the older expires standard, it makes sense to apply to cache-control too in the absence of any explicit standards guidance. It's as long as you should generally need anyway and picking any arbitrarily longer value could break some user-agents. So:
Cache-Control: max-age=31536000
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