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문자

X-Content-Type-Options响应的 HTTP 标头是由服务器使用以指示在通告的 MIME 类型的标记Content-Type标头不应该被改变,并且被遵循。这允许选择不使用 MIME 类型的嗅探,换句话说,它可以说网站管理员知道他们在做什么。

微软在 IE 8 中引入了这个头文件,作为网站管理员阻止正在发生的内容嗅探的一种方式,并且可以将不可执行的 MIME 类型转换为可执行的 MIME 类型。从那以后,其他浏览器已经引入了它,即使他们的 MIME 嗅探算法不那么激进。

网站安全测试人员通常希望设置该标题。

注意:nosniff仅适用于“ script”和“ style”类型。同样适用nosniff于图像原来与现有的网站不兼容。

Header type

Response header

Forbidden header name

no

句法

X-Content-Type-Options: nosniff

指令

nosniff阻止请求,如果请求的类型是

  • style”,而 MIME 类型不是“ text/css”,或者

  • script”,而 MIME 类型不是 JavaScript MIME 类型。

产品规格

Specification

Status

Comment

FetchThe definition of 'X-Content-Type-Options definition' in that specification.

Living Standard

Initial definition

浏览器兼容性

Feature

Chrome

Edge

Firefox

Internet Explorer

Opera

Safari

Basic Support

1.0

(Yes)

50

8.0

13

No

Feature

Android

Chrome for Android

Edge mobile

Firefox for Android

IE mobile

Opera Android

iOS Safari

Basic Support

(Yes)

(Yes)

(Yes)

50

(Yes)

(Yes)

No

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