网址中的空格？

问题描述

声称网址可以包含空格：

这是真的吗？网址如何包含未编码的空格？

我的印象是使用空格作为分隔符，格式为 {方法} {space} {path} {space} {协议} ：

  GET /index.html http / 1.1 
  

因此，URL如何包含空格？如果可以的话，用 + 替换空格的做法来自哪里？

解决方案

网址不得包含文字空间。必须使用或使用网址安全字符（例如对于空格使用 + 而不是％20 。

％20 不是空格（显然），但代表空格。

w3fools claims that URLs can contain spaces: http://w3fools.com/#html_urlencode

Is this true? How can a URL contain an un-encoded space?

I'm under the impression the request line of an HTTP Request uses a space as a delimiter, being formatted as {the method}{space}{the path}{space}{the protocol}:

GET /index.html http/1.1

Therefore how can a URL contain a space? If it can, where did the practice of replacing spaces with + come from?

解决方案

A URL must not contain a literal space. It must either be encoded using the percent-encoding or a different encoding that uses URL-safe characters (like application/x-www-form-urlencoded that uses + instead of %20 for spaces).

But whether the statement is right or wrong depends on the interpretation: Syntactically, a URI must not contain a literal space and it must be encoded; semantically, a %20 is not a space (obviously) but it represents a space.

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