Need a simple reg ex for url checking

Question

I am looking for it about 2 hours, but can not find what I need.

what I need is very simple:

allow: google.com, http://google.com, https://google.com
disallow spaces "goo gle.com"
with a valid domain: I mean it should have a dot "." + any domain (.com, .net etc.)
and allow anything after that: "googl.com/dsfsdf/sdfs/blablahblah/" without spaces

thanks

Edit: Thanks all, I had to write it myself.

    if (!/^((ftp|http|https):\/\/)?([a-z0-9_\.-]+)\.{1}([a-z0-9_\/\?\=\-\%-]+)$/.test(uri) 
|| /([\._\/\?\=\-\%-])\1/.test(uri)) {                                                     
    }

ps: I am noob in regexs.

^((ftp|http|https):\/\/)?([a-zA-Z0-9]+(\.[a-zA-Z0-9]+)+.*)$ This allows spaces in domain name "google.c om" — user01, Dec 23 '13 at 06:47
This is an excellent example of a question that should have been searched. Next time you have a programming problem, ask yourself "I wonder if anyone else has had to solve this problem before," and if the answer is "Yes", then do a search for it. — Andy Lester, Dec 23 '13 at 06:57
The problem that you were facing, "How do I validate a URL", is a very common one. If you think about it, you'll probably realize that you are not the first person to be faced with this problem to solve. So, if you have a very common problem to be solved, the very first thing you should do is search for the problem, such as "how can I validate a URL?", and then use the answer that you find, instead of asking a question that has already been answered a thousand times. — Andy Lester, Dec 23 '13 at 15:39

Amarnath Balasubramanian · Answer 1 · 2013-12-23T06:53:48.483

1

www.google.com
http://www.google.com
mailto:somebody@google.com
somebody@google.com
www.url-with-querystring.com/?url=has-querystring

The REGEX below matches all the above cases

((([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[\w]*))?)

REGEX Explanation can be found here

Working Example

edited Dec 23 '13 at 06:53

answered Dec 23 '13 at 06:47

Amarnath Balasubramanian

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score 0 · Answer 2 · answered Dec 23 '13 at 06:56

0

Something that's working for me on a production product (haven't received any complaints yet):

((www\.|(http|https|ftp|news|file)+\:\/\/)?[&#95;.a-z0-9-]+\.[a-z0-9\/&#95;:@=.+?,##%&~-]*[^.|\'|\# |!|\(|?|,| |>|<|;|\)])

answered Dec 23 '13 at 06:56

developer82

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your regex matches ww.google.com too, check here http://rubular.com/r/WTNDNolyLb – Amarnath Balasubramanian Dec 23 '13 at 07:00
well, ww.google.com is a valid url (even if you try to put it in a browser you'll get to google.com) - that's because "ww" could be a sub-domain – developer82 Dec 23 '13 at 07:03
@developer82 this allows spaces – user01 Dec 23 '13 at 07:08
@developer82 what about ww.gmail.com then?? – Amarnath Balasubramanian Dec 23 '13 at 07:10
@jack the space is resulted in 2 different addresses. what you could do is add a limit to the domain extension and limit it. but it doesn't make it less valid. – developer82 Dec 23 '13 at 07:14
@Amarnath ww.gmail.com - is still a valid domain name (where "ww" could be the sub-domain as I mentioned earlier). RegEx checks that a certine string matches - not that the domain actually alive and functioning - the face that "ww.gmail.com" results in "opps" doesn't make it an invalid domain. – developer82 Dec 23 '13 at 07:15

Need a simple reg ex for url checking

2 Answers2