Age

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

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Age 标头包含对象在代理缓存中停留的时间，以秒为单位。

Age 标头通常接近于 0。如果显示为 Age: 0，则表示该内容可能是从源服务器上获取的；否则，它通常是通过代理服务器当前日期与 HTTP 响应中包含的 Date 通用标头之间的差值来计算得出的。

标头类型 响应标头
禁止修改的标头 否

语法

http
Age: <delta-seconds>

指令

<delta-seconds>

一个非负整数，表示对象在代理缓存中停留的时间，以秒为单位。

示例

http
Age: 24

规范

Specification
HTTP Caching
# field.age

浏览器兼容性

Report problems with this compatibility data on GitHub
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Age

Tip: you can click/tap on a cell for more information.

Full support

参见