Adding to regex, dont allow certain characters

Question

I have a regex that does not allow an url to start with http, and foreces it to start with www. Now I would like to add to it so it does not allow any special characters.

Current regex: ^(?!https?)www\..*$

Characters I do not want to allow: !"@#£¤$%&/{([)]=}?+`´*'

I'm using ASP.NET.

I've tried using negated characters for ex: [^%!] to not allow % and !, but can't get it to work, it just checks the first character of the word.

Avinash Raj · Accepted Answer · 2015-03-04 10:43:05Z

2

Use a negative lookahead assertion at the start which includes the list of characters you want to exclude.

^(?!.*?[!"@#£¤$%&\/{(\[)\]=}?+\\`´*'])(?!https?)www\..*$

edited Mar 4, 2015 at 10:43

answered Mar 4, 2015 at 10:09

Avinash Raj

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1 Comment

Green_qaue Over a year ago

Thanks you for taking the time to answer. However in regex101.com this does not let me write for example "www.test.com"

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