使用部分捕获进行 url 验证的正则表达式 [英] Regex for url validation with parts capturing

问题描述

是否可以使用单个正则表达式来验证网址并匹配所有部分，我一直在研究一个，到目前为止我想出的是:

Can a single regex be used to valdate urls and match all the parts, I have been working on one and what I have come up with so far is:

(?:(?P<scheme>[a-z]*?)://)?(?:(?P<username>.*?):?(?P<password>.*?)?@)?(?P<hostname>.*?)/(?:(?:(?P<path>.*?)\?)?(?P<file>.*?\.[a-z]{1,6})?(?:(?:(?P<query>.*?)#?)?(?P<fragment>.*?)?)?)?

但是这不起作用，它应该匹配以下所有示例:

however this does not work, it should match all of the following examples:

http://username:[e-mail]/path?arg=value#anchor
http://www.domain.com/
http://www.doamin.co.uk/
http://www.yahoo.com/
http://www.google.au/
https://username:[e-mail]/
ftp://user:[e-mail]/path/
https://www.blah1.subdoamin.doamin.tld/
domain.tld/#anchor
doamin.tld/?query=123
domain.co.uk/
域名.tld
http://www.domain.tld/index.php?var1=blah
http://www.domain.tld/path/to/index.ext
mailto://[e-mail]

http://username:[e-mail]/path?arg=value#anchor
http://www.domain.com/
http://www.doamin.co.uk/
http://www.yahoo.com/
http://www.google.au/
https://username:[e-mail]/
ftp://user:[e-mail]/path/
https://www.blah1.subdoamin.doamin.tld/
domain.tld/#anchor
doamin.tld/?query=123
domain.co.uk/
domain.tld
http://www.domain.tld/index.php?var1=blah
http://www.domain.tld/path/to/index.ext
mailto://[e-mail]

并为所有组件提供一个命名捕获:

and provide a named capture for all the components:

方案例如.http https ftp ftps callto mailto 和任何其他未列出的
用户名
密码
主机名，包括子域、域和 tld
路径例如/images/profile/
文件名例如 file.ext
查询字符串例如.?foo=bar&bar=foo
片段例如.#锚

scheme eg. http https ftp ftps callto mailto and any other one not listed
username
password
hostname including subdomains, domainand tld
path eg /images/profile/
filename eg file.ext
query string eg. ?foo=bar&bar=foo
fragment eg. #anchor

将主机名作为唯一的必填字段.

With the hostname as the only mandatory field.

我们可以假设这是来自一个专门要求网址的表单，不会用于查找文本中的链接.

We can assume that this is coming from a form specificly asking for an url, and is not going to be used to find links in text.

推荐答案

明辉的正则表达式:

/^((?P<scheme>https?|ftp):\/)?\/?((?P<username>.*?)(:(?P<password>.*?)|)@)?(?P<hostname>[^:\/\s]+)(?P<port>:([^\/]*))?(?P<path>(\/\w+)*\/)(?P<filename>[-\w.]+[^#?\s]*)?(?P<query>\?([^#]*))?(?P<fragment>#(.*))?$/

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