HTTP状态码206：什么时候应该使用？ [英] HTTP Status Code 206: When should it be used?

问题描述

206状态代码（w3。 org）表示响应具有 Range 标题的请求的部分结果。

The 206 status code (w3.org) indicates a partial result in response to a request with a Range header.

所以清楚如果要求的文件是例如1024字节长，范围标头是 bytes = 0-512 然后状态代码 206部分内容。 （假设服务器能够返回内容）

So "clearly" if the requested document is e.g. 1024 bytes long, and the Range header is bytes=0-512 then a status code of 206 Partial Content should be returned. (Assuming that the server is able to return the content)

但是如果范围是<$ c $怎么办？ c> bytes = 0-2000 ？

应 200 OK 或 206部分内容可以退货吗？

在我看来，这在规范中没有明确定义 - 或者我可能没有在正确的位置阅读？

BUT what if the Range is bytes=0-2000?
Should 200 OK or 206 Partial Content be returned?
It seems to me that this isn't clearly defined in the specification -- or maybe I'm not reading the right place?

我为什么关心？
我问，因为 Varnish Cache 似乎总是返回 206 Partial Content ，而 Facebook Open Graph调试器似乎期望 200 OK 。 [ 1 ] [ 2 ]

Why do I care? I ask because the Varnish Cache seems to always return 206 Partial Content, whereas the Facebook Open Graph debugger seems to expect 200 OK. [1] [2]

示例：对Varnish的GET请求

（我收到完整的文档，然后返回 206 Partial Content ）

Example: GET request to Varnish
(I receive the full document, and yet 206 Partial Content is returned)

> curl --dump-header - -H 'Range: bytes=0-7000' https://www.varnish-cache.org/sites/all/themes/varnish_d7/logo.png
HTTP/1.1 206 Partial Content
Server: nginx/1.1.19
Date: Mon, 14 Apr 2014 22:43:31 GMT
Content-Type: image/png
Content-Length: 2884
Connection: keep-alive
Last-Modified: Thu, 15 Dec 2011 12:30:46 GMT
Accept-Ranges: bytes
X-Varnish: 1979866667
Age: 0
Via: 1.1 varnish
Content-Range: bytes 0-2883/2884

进一步参考w3： http：//www.w3 .org / Protocols / rfc2616 / rfc2616-sec14.html＃sec14.35

推荐答案

没关系。这两个回复都是有效的。

It doesn't matter. Both replies are valid.

（另请注意，当前的规范现在是 http://greenbytes.de/tech/webdav/draft-ietf-httpbis-p5-range-26.html ，将发布为RFC很快）

(also note that the current specification is now http://greenbytes.de/tech/webdav/draft-ietf-httpbis-p5-range-26.html, to be published as RFC soon)

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