URL路径中是否必须对'@'和'％40'进行等效处理? [英] Must '@' and '%40' be treated equivalently in URL paths?
问题描述
基于投票率最高的答案，@在URL路径中不是保留字符(尽管它是保留字符)在主机中.
Based on the top voted answer, the @ is not a reserved character in the URL path (although it is in the host).
但是，在路径中给定@的情况下，URL编码形式可以互换吗?换句话说，twitter.com/@user严格等于twitter.com/%40user吗?
However, given an @ in the path, is the URL-encoded form interchangeable? In other words, is twitter.com/@user strictly equivalent to twitter.com/%40user?
实际上，它们似乎经常互换使用，但很好奇是否确实如此(例如，AbC@gmail.com在技术上与abc@gmail.com不同，但几乎每个人都将它们相同).
In practice it seems like they're often used interchangeably, but curious if that is strictly the case (e.g. AbC@gmail.com is technically different from abc@gmail.com, but nearly everyone treats them the same).
更广泛地讲，什么时候需要将字符和具有URL编码的版本相同，何时需要区别对待(例如example.com/path%2Fasdf与example.com/path/asdf不同)……
More broadly, when do characters and there URL-encoded version need to be treated the same, and when different (e.g. example.com/path%2Fasdf is NOT the same as example.com/path/asdf) …
推荐答案
http://twitter.com/@user和http://twitter.com/%40user的URI 不等同.
URI标准为 STD 66 ，该标准当前映射到
The URI standard is STD 66, which currently maps to RFC 3986 (which updates RFC 1738).
6.2.2.2部分.百分比编码规范化定义了如何对百分比编码的URI进行规范化以比较它们的等效性(在由F大写之后). org/html/rfc3986#section-6.2.2.1"rel =" nofollow> 6.2.2.1案例规范化).
The section 6.2.2.2. Percent-Encoding Normalization defines how to normalize percent-encoded URIs to compare them for equivalence (after uppercasing hexadecimal digits A-F, as defined by 6.2.2.1 Case Normalization).
它说:
[…]一些URI生产者不需要百分比编码的百分比编码八位字节，导致URI等同于未编码的八位字节.如第2.3节.
链接的第2.3节列出了未保留的字符，它们是:
The linked section 2.3 lists the unreserved characters, which are:
- ALPHA(
a-z，A-Z) - DIGIT(
0-9) -
-._~
- ALPHA (
a-z,A-Z) - DIGIT (
0-9) -._~
本节还指出，即使未进行标准化:
This sections also states that, even in case no normalization happens:
在将未保留的字符替换为其相应的百分比编码的US-ASCII八位字节方面不同的URI是等效的:它们标识相同的资源.
URIs that differ in the replacement of an unreserved character with its corresponding percent-encoded US-ASCII octet are equivalent: they identify the same resource.
@不属于未保留"集.它是保留"集的一部分，其中表示:
The @ is not part of the "unreserved" set. It’s part of the "reserved" set, where it says:
在保留字符替换为其相应的百分比编码的八位字节方面有所不同的URI不是等效的.
URIs that differ in the replacement of a reserved character with its corresponding percent-encoded octet are not equivalent.
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