/^(?:(?:https?|ftp):/\/)(?:\S+(?::\S*)?@)?(?:(?!(?:10|127)(?:\.\d{1,3}){3})(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(?:(?:[a-z\u00a1-\uffff0-9]-{1})*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]-{1})*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,}))\.?)(?::\d{2,5})?(?:[\/?#]\S*)?$/gi
Validates any url. Can you find an invalid url it validates?
Sources:
https://mathiasbynens.be/demo/url-regex
https://gist.github.com/dperini/729294#comment-972393
This Regex has been modified to exclude repeated hyphens.
These URLs should pass
http://foo.com/blah_blah
http://foo.com/blah_blah/
http://foo.com/blah_blah_(wikipedia)
http://foo.com/blah_blah_(wikipedia)_(again)
http://www.example.com/wpstyle/?p=364
https://www.example.com/foo/?bar=baz&inga=42&quux
http://✪df.ws/123
http://userid:password@example.com:8080
http://userid:password@example.com:8080/
http://userid@example.com
http://userid@example.com/
http://userid@example.com:8080
http://userid@example.com:8080/
http://userid:password@example.com
http://userid:password@example.com/
http://142.42.1.1/
http://142.42.1.1:8080/
http://➡.ws/䨹
http://⌘.ws
http://⌘.ws/
http://foo.com/blah_(wikipedia)#cite-1
http://foo.com/blah_(wikipedia)_blah#cite-1
http://foo.com/unicode_(✪)_in_parens
http://foo.com/(something)?after=parens
http://☺.damowmow.com/
http://code.google.com/events/#&product=browser
http://j.mp
ftp://foo.bar/baz
http://foo.bar/?q=Test%20URL-encoded%20stuff
http://www.foo.bar./
http://مثال.إختبار
http://例子.测试
http://उदाहरण.परीक्षा
http://-.~_!$&'()*+,;=:%40:80%2f::::::@example.com
http://1337.net
http://a.b-c.de
http://223.255.255.254
These URLs should fail
http://
http://.
http://..
http://../
http://?
http://??
http://??/
http://#
http://##
http://##/
http://foo.bar?q=Spaces should be encoded
//
//a
///a
///
http:///a
foo.com
rdar://1234
h://test
http:// shouldfail.com
:// should fail
http://foo.bar/foo(bar)baz quux
ftps://foo.bar/
http://-error-.invalid/
http://a.b--c.de/
http://-a.b.co
http://a.b-.co
http://0.0.0.0
http://10.1.1.0
http://10.1.1.255
http://224.1.1.1
http://1.1.1.1.1
http://123.123.123
http://3628126748
http://.www.foo.bar/
http://10.1.1.1
http://10.1.1.254
