Response header


一个响应头是一个可以在HTTP响应中使用的与消息内容无关的HTTP header

Response headers, like Age, Location or Server are used to give a more detailed context of the response.

Not all headers appearing in a response are response headers. For example, the Content-Length header is an entity header referring to the size of the body of the request message. However, these entity requests are usually called responses headers in such a context.

The following shows a few response headers after a GET request. Note that strictly speaking, the Content-Encoding and Content-Type headers are entity headers:

200 OK
Access-Control-Allow-Origin: *
Connection: Keep-Alive
Content-Encoding: gzip
Content-Type: text/html; charset=utf-8
Date: Mon, 18 Jul 2016 16:06:00 GMT
Etag: "c561c68d0ba92bbeb8b0f612a9199f722e3a621a"
Keep-Alive: timeout=5, max=997
Last-Modified: Mon, 18 Jul 2016 02:36:04 GMT
Server: Apache
Set-Cookie: mykey=myvalue; expires=Mon, 17-Jul-2017 16:06:00 GMT; Max-Age=31449600; Path=/; secure
Transfer-Encoding: chunked
Vary: Cookie, Accept-Encoding
X-Cache-Info: not cacheable; meta data too large
X-kuma-revision: 1085259
x-frame-options: DENY

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