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文字

Age header 包含以秒计的对象一直在代理缓存的时间。

Age 的 header 通常接近于零。如果是这样Age: 0,它可能只是从原始服务器获取; 否则它通常是根据代理的当前日期和Date HTTP 响应中包含的通用头部之间的差异来计算的。

Header type

Response header

Forbidden header name

no

语法

Age: <delta-seconds>

指令

<delta-seconds>

一个非负整数,表示该对象在代理缓存中的时间(以秒为单位)。

例子

Age: 24

规范

Specification

Title

RFC 7234, section 5.1: Age

Hypertext Transfer Protocol (HTTP/1.1): Caching

浏览器兼容性

Feature

Chrome

Firefox

Edge

Internet Explorer

Opera

Safari

Basic Support

(Yes)

(Yes)

(Yes)

(Yes)

(Yes)

(Yes)

Feature

Android

Chrome for Android

Edge mobile

Firefox for Android

IE mobile

Opera Android

iOS Safari

Basic Support

(Yes)

(Yes)

(Yes)

(Yes)

(Yes)

(Yes)

(Yes)

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