URL验证的正则表达式（在JavaScript中） [英] Regular expression for URL validation (in JavaScript)

问题描述

是否有人使用正则表达式来验证网址（不是在文本段落中找到它们）？首选JavaScript代码段。

Does someone have a regex for validating urls (NOT for finding them inside a text passage)? JavaScript snippet would be preferred.

推荐答案

实际的网址语法非常复杂，在正则表达式中难以表示。大多数看起来很简单的正则表达式会产生许多假阴性和误报。欢迎参见这些努力，但即使最终结果也不好。

The actual URL syntax is pretty complicated and not easy to represent in regex. Most of the simple-looking regexes out there will give many false negatives as well as false positives. See for amusement these efforts but even the end result is not good.

如今，您通常希望允许IRI以及老式URI，因此我们可以链接到有效地址，例如：

Plus these days you would generally want to allow IRI as well as old-school URI, so we can link to valid addresses like:

http://en.wikipedia.org/wiki/Þ
http://例え.テスト/

我只会进行简单的检查：是否以一种已知良好的方法开头：名字？它没有空格和双引号吗？如果是这样，那么它可能就足够了。

I would go only for simple checks: does it start with a known-good method: name? Is it free of spaces and double-quotes? If so then hell, it's probably good enough.

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