Validate Useragent with Regex

Question

I'm trying to validate a useragent which has the following format

Mozilla/5.0 (Linux; U; Android <android>; <locale>; <device> Build/<build>) AppleWebKit/<webkit> (KHTML, like Gecko) Version/4.0 Mobile Safari/<safari>

The useragent could be i.e.

Mozilla/5.0 (Linux; U; Android 4.2.2; en-us; AFTB Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30

My regex so far is

Mozilla\/5\.0 \(Linux; U; Android (\d+\.)?(\d+\.)?(\*|\d+); [a-z]{2}-[a-z]{2} (AFTA|AFTN|AFTS|AFTB|AFTT|AFTM|AFTKMST12|AFTRS) Build\/([A-Z0-9])\) AppleWebKit\/(\d+\.)?(\*|\d+) \(KHTML, like Gecko\) Version\/4\.0 Mobile Safari\/(\d+\.)?(\*|\d+)

Test: https://regex101.com/r/nXKYBB/1

But it didn't match. What is wrong with it?

Wiktor Stribiżew · Accepted Answer · 2018-08-17 21:20:11Z

1

You have missed a ; after en-de and + after [A-Z0-9]:

Mozilla\/5\.0 \(Linux; U; Android (\d+\.)?(\d+\.)?(\*|\d+); [a-z]{2}-[a-z]{2}; (AFTA|AFTN|AFTS|AFTB|AFTT|AFTM|AFTKMST12|AFTRS) Build\/([A-Z0-9]+)\) AppleWebKit\/(\d+\.)?(\*|\d+) \(KHTML, like Gecko\) Version\/4\.0 Mobile Safari\/(\d+\.)?(\*|\d+)

See the regex demo

Note that it might be a good idea to match non-capturing groups, (?:...), rather than capturing groups if you do not plan to use those captured subvalues later, and use \s to match whitespace.

Also, if you plan to match the whole string, wrap the pattern with ^ and $.

answered Aug 17, 2018 at 21:20

Wiktor Stribiżew

631k41 gold badges502 silver badges633 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Validate Useragent with Regex

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related