Content-Range 标头 - 允许的单位? [英] Content-Range header - allowed units?

问题描述

这与:我应该如何在我的 RESTful Web 服务? , 在 Rest 集合中分页和 使用带有字节以外的范围说明符?

实际上我认为这里的 -1 评级 anwser 是正确的 https://stackoverflow.com/a/1434701/1237617

Actually I think the -1 rated anwser here is correct https://stackoverflow.com/a/1434701/1237617

通常 anwsers 说你可以使用自定义单位引用 sec 3.12

Generally anwsers say that you can use custom units citing the sec 3.12

  range-unit       = bytes-unit | other-range-unit
  bytes-unit       = "bytes"
  other-range-unit = token

但是，当您阅读 HTTP 规范时，请注意生产规则是这样的:

However when you read the HTTP spec please notice the production rules are thus:

   Content-Range = "Content-Range" ":" content-range-spec
   content-range-spec      = byte-content-range-spec
   byte-content-range-spec = bytes-unit SP
                             byte-range-resp-spec "/"
                             ( instance-length | "*" )

标头规范只引用了第 3.12 节中的字节单位，而不是范围单位，所以我认为实际上在这里使用自定义单位是违反规范的.

The header spec only references bytes-unit from sec 3.12, not range-units, so I think that actually it's against the spec to use custom units here.

是我遗漏了什么还是流行的回答有问题?

Am I missing something or is the popular anwser wrong?

由于这可能不清楚，我的问题的要点是:rfc2616 sec14.16 仅引用字节单位.它从未提及范围单位，因此范围单位的产生与内容范围无关，因此只能使用字节单位.

Since this probbably isn't clear, the gist of my question is: rfc2616 sec14.16 only references bytes-unit. It never mentions range-unit, so range-unit production is not relevant for Content-Range, and thus only byte-units can be used.

我认为这最能解决我的担忧，尽管我需要一些时间来理解它(另外我想确保措辞有问题).

I think this adresses my concerns best, although I needed some time to understand it (plus I wanted to make sure, that there is something wrong with the wording).

这反映了一个事实，显然，第一组语法规则是专门为解析而制定的，第二组是为产生 HTTP 请求而制定的

This reflects the fact that, apparently, the first set of grammar rules has been specifically made for parsing and the second one for producing HTTP requests

感谢埃尔加顿

推荐答案

正在修订的规范允许自定义范围单位.请参阅 HTTPbis 第 5 部分第 2 部分.

The spec, as being revised, allows custom range units. See HTTPbis Part 5, Section 2.

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