分号作为URL查询分隔符 [英] Semicolon as URL query separator

问题描述

删除了死的Imageshack链接 - &符号与分号

虽然强烈建议（ W3C源，来自 Wikipedia ）对于Web服务器来说，支持分号作为URL查询项的分隔符（除了&符号）之外，似乎一般都没有遵循。

Although it is strongly recommended (W3C source, via Wikipedia) for web servers to support semicolon as a separator of URL query items (in addition to ampersand), it does not seem to be generally followed.

例如，比较

http://www.google.com/search?q=nemo & oe = utf-8

        http://www.google.com/search?q=nemo&oe=utf-8

http： //www.google.com/search?q=nemo;oe=utf-8

        http://www.google.com/search?q=nemo;oe=utf-8

结果。 （在后一种情况下，分号是，或者在撰写本文时，被视为普通字符串字符，就像网址是： http://www.google.com/search?q=nemo ％3B oe = utf-8 ）

results. (In the latter case, semicolon is, or was at the time of writing this text, treated as ordinary string character, as if the url was: http://www.google.com/search?q=nemo%3Boe=utf-8)

虽然我尝试了第一个URL解析库，但表现还不错：

Although the first URL parsing library i tried, behaves well:

>>> from urlparse import urlparse, query_qs
>>> url = 'http://www.google.com/search?q=nemo;oe=utf-8'
>>> parse_qs(urlparse(url).query)
{'q': ['nemo'], 'oe': ['utf-8']}

接受分号作为分隔符的当前状态是什么，哪些是潜在的问题或一些有趣的注释？ （从服务器和客户端的角度来看）

What is the current status of accepting semicolon as a separator, and what are potential issues or some interesting notes? (from both server and client point of view)

推荐答案

1999年的W3C建议书已经过时。根据的当前状态2014 W3C建议，分号现在是非法作为参数分隔符：

The W3C Recommendation from 1999 is obsolete. The current status, according to the 2014 W3C Recommendation, is that semicolon is now illegal as a parameter separator:

要解码application / x-www-form-urlencoded payloads，应使用以下算法。 [...]此算法的输出是名称 - 值对的排序列表。 [...]

To decode application/x-www-form-urlencoded payloads, the following algorithm should be used. [...] The output of this algorithm is a sorted list of name-value pairs. [...]

1. 让字符串成为严格拆分U + 0026 AMPERSAND字符（&）上字符串有效负载的结果。

换句话说，？foo = bar; baz 表示参数 foo 的值为 bar; baz ;而？foo = bar; baz = sna 应导致 foo 为 bar; baz = sna （虽然技术上非法，因为第二个 = 应该转义为％3D ）。

In other words, ?foo=bar;baz means the parameter foo will have the value bar;baz; whereas ?foo=bar;baz=sna should result in foo being bar;baz=sna (although technically illegal since the second = should be escaped to %3D).

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