CODEWITHSUNDEEP
regexasp.net-mvcvalidation
rikket
rikket

Reputation: 2407

Regex validation works without domain

So I have the following Regex URL validator:

[a-zA-Z0-9][a-zA-Z0-9-]{1,61}[a-zA-Z0-9](?:\.[a-zA-Z]{2,})+

It works perfectly well for my needs, except that it accepts urls without a domain for example www.test works.

How can I modify it to validate for a domain? (Any domain should be accepted not just .com

Demo

Upvotes: 0

Views: 42

Answers (2)

Bananaapple
Bananaapple

Reputation: 3114

You could do it like this to account for unicode:

^\p{L}+\.\p{L}+(\.\p{L}{2,})+

\p{L} or \p{Letter}: any kind of letter from any language.

So with this we match for a group of one or more letters (sudomain) followed by a . followed by a group of one or more letters (main domain) followed by any number of groups of . with two or more letters (domain suffix).

Upvotes: 0

Tim Biegeleisen
Tim Biegeleisen

Reputation: 521997

Just make the last group in your regex mandatory as appearing two or more times:

[a-zA-Z0-9][a-zA-Z0-9-]{1,61}[a-zA-Z0-9](?:\.[a-zA-Z]{2,}){2,}

As a disclaimer, and as @Wiktor will probably comment, you might want to use a regex pattern for validating URLs which already has been tested thoroughly. While this answer may fix your immediate problem, there are most likely other edge cases which exist.

Upvotes: 2

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