Getting parts of a URL (Regex)

Given the URL (single line):
http://test.example.com/dir/subdir/file.html

How can I extract the following parts using regular expressions:

The Subdomain (test)

The Domain (example.com)

The path without the file (/dir/subdir/)

The file (file.html)

The path with the file (/dir/subdir/file.html)

The URL without the path (http://test.example.com)

(add any other that you think would be useful)

The regex should work correctly even if I enter the following URL:
http://example.example.com/example/example/example.html

Thank you.

---

A single regex to parse and breakup a full URL including query parameters and anchors eg

https://www.google.com/dir/1/2/search.html?arg=0-a&arg1=1-b&arg3-c#hash

^((http[s]?|ftp):/)?/?([^:/s]+)((/w+)*/)([w-.]+[^#?s]+)(.*)?(#[w-]+)?$

RexEx positions:

url: RegExp['$&'],

protocol:RegExp.$2,

host:RegExp.$3,

path:RegExp.$4,

file:RegExp.$6,

query:RegExp.$7,

hash:RegExp.$8

you could then further parse the host ('.' delimited) quite easily.

What I would do is use something like this:

/*
    ^(.*:)//([A-Za-z0-9-.]+)(:[0-9]+)?(.*)$
*/
proto $1
host $2
port $3
the-rest $4

the further parse 'the rest' to be as specific as possible. Doing it in one regex is, well, a bit crazy.

---

我意识到我迟到了，但是有一个简单的方法可以让浏览器为你解析一个没有正则表达式的url：

var a = document.createElement('a');
a.href = 'http://www.example.com:123/foo/bar.html?fox=trot#foo';

['href','protocol','host','hostname','port','pathname','search','hash'].forEach(function(k) {
    console.log(k+':', a[k]);
});

/*//Output:
href: http://www.example.com:123/foo/bar.html?fox=trot#foo
protocol: http:
host: www.example.com:123
hostname: www.example.com
port: 123
pathname: /foo/bar.html
search: ?fox=trot
hash: #foo
*/

---

I'm a few years late to the party, but I'm surprised no one has mentioned the Uniform Resource Identifier specification has a section on parsing URIs with a regular expression. The regular expression, written by Berners-Lee, et al., is:

^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(?([^#]*))?(#(.*))?
 12            3  4          5       6  7        8 9

The numbers in the second line above are only to assist readability; they indicate the reference points for each subexpression (ie, each paired parenthesis). We refer to the value matched for subexpression as $. For example, matching the above expression to

http://www.ics.uci.edu/pub/ietf/uri/#Related

results in the following subexpression matches:

$1 = http:
$2 = http
$3 = //www.ics.uci.edu
$4 = www.ics.uci.edu
$5 = /pub/ietf/uri/
$6 = <undefined>
$7 = <undefined>
$8 = #Related
$9 = Related

For what it's worth, I found that I had to escape the forward slashes in JavaScript:

^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(?([^#]*))?(#(.*))?

链接地址: http://www.djcxy.com/p/76776.html

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