Regular expression for browser Url

Question

I am new to JavaScript

i need a regular expression which

allows both of this forms

for example :

http://www.google.com
www.google.com

possible duplicate of [What is the best regular expression to check if a string is a valid URL](http://stackoverflow.com/questions/161738/what-is-the-best-regular-expression-to-check-if-a-string-is-a-valid-url) — Georg Fritzsche, May 24 '10 at 19:01

score 1 · Answer 1 · edited May 24 '10 at 19:06

1

var url_pattern = new RegExp("((ftp|http|https)(:\/\/))?([a-zA-Z0-9]+[.]{1}){2}[a-zA-z0-9]+(\/{1}[a-zA-Z0-9]+)*\/?", "i");

return url_pattern.test(url);

edited May 24 '10 at 19:06

Felix Kling

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answered May 24 '10 at 19:01

sushil bharwani

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Hey chris i have one more question I have used the code for same url http://stackoverflow.com/questions/2899454/regular-expression-for-browser-url its not working – pkumar May 24 '10 at 19:34

score 0 · Answer 2 · answered May 24 '10 at 18:58

0

(ftp|http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-\/]))?

This works quite well.

answered May 24 '10 at 18:58

chris12892

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Thanks for the reply I am using same expression but its not allowing this form of url www.google.com – pkumar May 24 '10 at 19:03
Interesting. I am using that very pattern in a few of my applications, and it has always worked really well. Are you sure there isn't an error in your code? – chris12892 May 24 '10 at 19:05
1

Shouldn't it be `((ftp|http|https):\/\/)?...` ? – Felix Kling May 24 '10 at 19:07

score 0 · Answer 3 · edited May 23 '17 at 12:13

^((?:(?:https?|ftp):)?\/\/?)?(?:\S+(?::\S*)?@)?(?:(?!10(?:\.\d{1,3}){3})(?!127(?:\.\d{1,3}){3})(?!169\.254(?:\.\d{1,3}){2})(?!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\x{00a1}-\x{ffff}0-9]+-?)*[a-z\x{00a1}-\x{ffff}0-9]+)(?:\.(?:[a-z\x{00a1}-\x{ffff}0-9]+-?)*[a-z\x{00a1}-\x{ffff}0-9]+)*(?:\.(?:[a-z\x{00a1}-\x{ffff}]{2,})))(?::\d{2,5})?(?:\/[^\s]*)?$

Test it! https://regex101.com/r/qQ8uV6/1

Extracted from In search of the perfect URL validation regex https://mathiasbynens.be/demo/url-regex (modified it a bit).

credits to @diegoperini.

If you test it in JavaScript, you'll get a nice

ParseError: Error parsing regular expression: Invalid regular expression

....

Range out of order in character class

You need to replace \x{xxxx} for \uxxxx. So in JavaScript it'll be:

^(?:(?:https?|ftp):\/\/)?(?:\S+(?::\S*)?@)?(?:(?!10(?:\.\d{1,3}){3})(?!127(?:\.\d{1,3}){3})(?!169\.254(?:\.\d{1,3}){2})(?!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-\ufff0-9]+-?)*[a-z\u00a1-\uffff0-9]+)(?:\.(?:[a-z\u00a1-\uffff0-9]+-?)*[a-z\u00a1-\uffff0-9]+)*(?:\.(?:[a-z\u00a1-\uffff]{2,})))(?::\d{2,5})?(?:\/[^\s]*)?$

Just like stated in JavaScript Unicode Regex - Range out of order in character class

Matthew O'Riordan · Answer 4 · 2011-11-22T22:56:50.487

I've just written up a blog post on recognising URLs in most used formats such as:

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

The regular expression used is /((([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[\w]*))?)/ however I would recommend you got to http://blog.mattheworiordan.com/post/13174566389/url-regular-expression-for-links-with-or-without-the to see a complete working example along with an explanation of the regular expression in case you need to extend or tweak it.

Regular expression for browser Url

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