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文字

Access-Control-Max-Age响应 header 指示多长时间的结果预检请求(即包含在所述信息Access-Control-Allow-MethodsAccess-Control-Allow-Headers的 headers )可以被缓存。

Header type

Response header

Forbidden header name

no

语法

Access-Control-Max-Age: <delta-seconds>

指令

<delta-seconds> 结果可以被缓存的最大秒数。

Firefox 在24小时(86400秒)和10分钟(600秒)的 Chromium 上限。Chromium 还指定了5秒的默认值。

值为-1将禁用缓存,需要对所有呼叫进行预检选项检查。

例子

将预检请求的结果缓存10分钟:

Access-Control-Max-Age: 600

规范

Specification

Status

Comment

FetchThe definition of 'Access-Control-Max-Age' in that specification.

Living Standard

Initial definition.

浏览器兼容性

Feature

Chrome

Firefox

Edge

Internet Explorer

Opera

Safari

Basic Support

4

3.5

12

10

12

4

Feature

Android

Chrome for Android

Edge mobile

Firefox for Android

IE mobile

Opera Android

iOS Safari

Basic Support

2.1

(Yes)

(Yes)

1.0

(Yes)

12

3.2

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