Comments on: A good url regular expression? (repost)

By: Alexey Novikov

Alexey Novikov — Sun, 14 Mar 2010 17:21:13 +0000

By the way, there can be slashes after the anchor symbol (octothorp or dies or sharp). For example, in some gmail links. So if we do not to mark such URLs as invalid, we should include slash in the last part of this regexp:

(?#Anchor)(?:#(?:[-\w~!$ |/.,*:;=]|%[a-f\d]{2})*)?$

By: Alexey Novikov

Alexey Novikov — Sun, 14 Mar 2010 10:09:25 +0000

I've enhanced it. Now it works with IPs Even if you write 1.01.001.000


^(?#Protocol)(?:(?:ht|f)tp(?:s?)\:\/\/|~\/|\/)?(?#Username:Password)(?:\w :\w @)?((?#Subdomains)(?:(?:[-\w] \.) (?#TopLevel Domains)(?:com|org|net|gov|mil|biz|info|mobi|name|aero|jobs|museum|travel|[a-z]{2}))|(?#IP)((\b25[0-5]\b|\b[2][0-4][0-9]\b|\b[0-1]?[0-9]?[0-9]\b)(\.(\b25[0-5]\b|\b[2][0-4][0-9]\b|\b[0-1]?[0-9]?[0-9]\b)){3}))(?#Port)(?::[\d]{1,5})?(?#Directories)(?:(?:(?:\/(?:[-\w~!$ |.,=]|%[a-f\d]{2}) ) |\/) |\?|#)?(?#Query)(?:(?:\?(?:[-\w~!$ |.,*:]|%[a-f\d{2}]) =?(?:[-\w~!$ |.,*:;=]|%[a-f\d]{2})*)(?:&(?:[-\w~!$ |.,*:]|%[a-f\d{2}]) =?(?:[-\w~!$ |.,*:;=]|%[a-f\d]{2})*)*)*(?#Anchor)(?:#(?:[-\w~!$ |.,*:;=]|%[a-f\d]{2})*)?$

By: Mina

Mina — Tue, 23 Feb 2010 07:45:46 +0000

Thanks a lot for this wonderful article

By: zerkms

zerkms — Tue, 16 Feb 2010 00:42:29 +0000

in the last comment i mean “& amp;” (without space)

By: zerkms

zerkms — Tue, 16 Feb 2010 00:40:11 +0000

what about “&” in urls?

By: Rene

Rene — Mon, 15 Feb 2010 19:12:15 +0000

I tried it with PHP and works flawlessly, I tried like 8 different ones from regexlibrary.com and this one killed them all. I’m just wondering if it will work with JS, I’ll keep you guys posted…

By: matapult

matapult — Mon, 08 Feb 2010 10:55:37 +0000

Nope, didn’t work for me. I tried this ultra-basic implementation in python

—————————————————————
#!/usr/bin/env python

import re
line =”this is an example of a url that someone might write in some text http://www.google.com test test test”
urls = []

urls.append( re.findall( r”^(?#Protocol)(?:(?:ht|f)tp(?:s?)\:\/\/|~\/|\/)?(?#Username:Password)(?:\w :\w @)?(?#Subdomains)(?:(?:[-\w] \.) (?#TopLevel Domains)(?:com|org|net|gov|mil|biz|info|mobi|name|aero|jobs|museum|travel|[a-z]{2}))(?#Port)(?::[\d]{1,5})?(?#Directories)(?:(?:(?:\/(?:[-\w~!$ |.,=]|%[a-f\d]{2}) ) |\/) |\?|#)?(?#Query)(?:(?:\?(?:[-\w~!$ |.,*:]|%[a-f\d{2}]) =?(?:[-\w~!$ |.,*:=]|%[a-f\d]{2})*)(?:&(?:[-\w~!$ |.,*:]|%[a-f\d{2}]) =?(?:[-\w~!$ |.,*:=]|%[a-f\d]{2})*)*)*(?#Anchor)(?:#(?:[-\w~!$ |.,*:=]|%[a-f\d]{2})*)?$”, line ) )

print urls
—————————————————

and it didnt find anything, not even the basic google.com

By: J. Benitez

J. Benitez — Sun, 07 Feb 2010 04:16:46 +0000

There’s no browser that can handle it

By: petrelevich

petrelevich — Fri, 05 Feb 2010 20:08:00 +0000

What would you say about this?

^(?:(?:(?:http[s]?):\/\/)|(?:www.))(?:[-_0-9a-z] .) [-_0-9a-z]{2,4}[:0-9]*[\/]*$

By: smb

smb — Thu, 07 Jan 2010 16:37:21 +0000

Don’t care about russian and asian characters. Before you validate an URL, you have to convert it to PunyCode, which only uses A-Z, 0-9 and -. So “中国” ain’t in URLs