Content-Language - [ HTTP 中文开发手册 ] - 在线原生手册

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watak

Content-Language 实体头用于描述旨在为观众的语言（S），使得其允许用户根据用户自己的优选语言区分。

例如，如果Content-Language: de-DE设置了“ ”，它表示该文件是用于德语的人（但是，它并不表示该文件是用德语写的，例如，它可能是用英语写成的，作为语言课程的一部分为德语人士）。

如果Content-Language未指定，则默认情况下内容适用于所有语言受众。多语言标签也是可能的，以及将Content-Language标题应用于各种媒体类型而不仅仅是文本文档。

Header type	Entity header
Forbidden header name	no
CORS-safelisted response-header	yes
CORS-safelisted request-header	yes

语法

Content-Language: de-DE
Content-Language: en-US
Content-Language: de-DE, en-CA

指令

language-tag多个语言标签用逗号分隔。每个语言标记都是一个或多个不区分大小写的子标记的序列，每个子标记都用连字符（“ -”，“ %x2D）分隔。在大多数情况下，语言标签由标识相关语言的广泛系列的主要语言子标签组成（例如“ en”=英语），可选地后跟一系列细化或缩小该语言范围的子标签（例如“ en-CA“=在加拿大传达的英语的多样性）。

注意：语言标记在 RFC 5646中形式化地定义，它继承 ISO 639标准（通常是 ISO 639-1代码列表）以用于要使用的语言代码。

例子

指示文档被写入的语言

全局lang属性用于 HTML 元素以指示整个 HTML 文档或其中一部分的语言。

<html lang="de">

千万不能使用这样这个荟萃元素说明文档语言：

<!-- /!\ This is bad practice --><meta http-equiv="content-language" content="de">

指示资源的目标受众

Content-Language头用于指定 页面的目标受众 ，并能表明这是一种以上的语言。

Content-Language: de, en

规范

Specification	Title
RFC 7231, section 3.1.3.2: Content-Language	Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content

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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