正则表达式:验证没有查询参数的URL路径

问题描述

我不是regex专家，并且我想做一个看起来很简单并且可以在python 2.7中使用的方法，这让我很伤脑筋:验证没有查询字符串的URL的路径(无主机名).换句话说，以/开头的字符串允许字母数字值，并且不允许除以下以外的任何其他特殊字符:/，.，-

I'm not a regex expert and I'm breaking my head trying to do one that seems very simple and works in python 2.7: validate the path of an URL (no hostname) without the query string. In other words, a string that starts with /, allows alphanumeric values and doesn't allow any other special chars except these: /, ., -

我发现了此帖子与我需要的内容非常相似，但对我来说根本不工作，我可以用例如aaa进行测试，即使它不是以/开头，它也会返回true.

I found this post that is very similar to what I need but for me isn't working at all, I can test with for example aaa and it will return true even if it doesn't start with /.

我目前正在使用的正则表达式是这样的:

The current regex that I have kinda working is this one:

[^/+a-zA-Z0-9.-]

，但不适用于不是以/开头的路径.例如:

but it doesn't work with paths that don't start with /. For example:

• /aaa->是的，没关系
• /aaa/bbb->是的，没关系
• /aaa?q=x->否，没关系
• aaa->是的，这不行

• /aaa -> true, this is ok
• /aaa/bbb -> true, this is ok
• /aaa?q=x -> false, this is ok
• aaa -> true, this is NOT ok

推荐答案

您定义的正则表达式是字符类.相反，请尝试:

The regex you've defined is a character class. Instead, try:

^\/[/.a-zA-Z0-9-]+$

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