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

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Guides Access control CORS Authentication Browser detection using the user agent Caching Caching FAQ Compression Conditional requests Connection management in HTTP 1.x Content negotiation Content negotiation: List of default Accept values Cookies CSP Messages Overview Protocol upgrade mechanism Proxy servers and tunneling Proxy servers and tunneling: Proxy Auto-Configuration (PAC) file Public Key Pinning Range requests Redirections Resources and specifications Resources and URIs Response codes Server-Side Access Control Session Guides: Basics Basics of HTTP Choosing between www and non-www URLs Data URIs Evolution of HTTP Identifying resources on the Web MIME Types MIME types: Complete list of MIME types CSP Content-Security-Policy Content-Security-Policy-Report-Only CSP: base-uri CSP: block-all-mixed-content CSP: child-src CSP: connect-src CSP: default-src CSP: font-src CSP: form-action CSP: frame-ancestors CSP: frame-src CSP: img-src CSP: manifest-src CSP: media-src CSP: object-src CSP: plugin-types CSP: referrer CSP: report-uri CSP: require-sri-for CSP: sandbox CSP: script-src CSP: style-src CSP: upgrade-insecure-requests CSP: worker-src Headers Accept Accept-Charset Accept-Encoding Accept-Language Accept-Ranges Access-Control-Allow-Credentials Access-Control-Allow-Headers Access-Control-Allow-Methods Access-Control-Allow-Origin Access-Control-Expose-Headers Access-Control-Max-Age Access-Control-Request-Headers Access-Control-Request-Method Age Allow Authorization Cache-Control Connection Content-Disposition Content-Encoding Content-Language Content-Length Content-Location Content-Range Content-Type Cookie Cookie2 Date DNT ETag Expect Expires Forwarded From Headers Host If-Match If-Modified-Since If-None-Match If-Range If-Unmodified-Since Keep-Alive Large-Allocation Last-Modified Location Origin Pragma Proxy-Authenticate Proxy-Authorization Public-Key-Pins Public-Key-Pins-Report-Only Range Referer Referrer-Policy Retry-After Server Set-Cookie Set-Cookie2 SourceMap Strict-Transport-Security TE Tk Trailer Transfer-Encoding Upgrade-Insecure-Requests User-Agent User-Agent: Firefox Vary Via Warning WWW-Authenticate X-Content-Type-Options X-DNS-Prefetch-Control X-Forwarded-For X-Forwarded-Host X-Forwarded-Proto X-Frame-Options X-XSS-Protection Methods CONNECT DELETE GET HEAD Methods OPTIONS PATCH POST PUT Status 100 Continue 101 Switching Protocols 200 OK 201 Created 202 Accepted 203 Non-Authoritative Information 204 No Content 205 Reset Content 206 Partial Content 300 Multiple Choices 301 Moved Permanently 302 Found 303 See Other 304 Not Modified 307 Temporary Redirect 308 Permanent Redirect 400 Bad Request 401 Unauthorized 403 Forbidden 404 Not Found 405 Method Not Allowed 406 Not Acceptable 407 Proxy Authentication Required 408 Request Timeout 409 Conflict 410 Gone 411 Length Required 412 Precondition Failed 413 Payload Too Large 414 URI Too Long 415 Unsupported Media Type 416 Range Not Satisfiable 417 Expectation Failed 426 Upgrade Required 428 Precondition Required 429 Too Many Requests 431 Request Header Fields Too Large 451 Unavailable For Legal Reasons 500 Internal Server Error 501 Not Implemented 502 Bad Gateway 503 Service Unavailable 504 Gateway Timeout 505 HTTP Version Not Supported 511 Network Authentication Required Status

Figuren

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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