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go

How to validate UUID v4 in Go?

I have the following piece of code:

func GetUUIDValidator(text string) bool {
    r, _ := regexp.Compile("/[a-f0-9]{8}-[a-f0-9]{4}-4[a-f0-9]{3}-[89aAbB][a-f0-9]{3}-[a-f0-9]{12}/")
    return r.Match([]byte(text))
}

But when I pass fbd3036f-0f1c-4e98-b71c-d4cd61213f90 as a value, I got false, while indeed it is an UUID v4.

What am I doing wrong?

Solution

  • Try with...

    func IsValidUUID(uuid string) bool {
    r := regexp.MustCompile("^[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-4[a-fA-F0-9]{3}-[8|9|aA|bB][a-fA-F0-9]{3}-[a-fA-F0-9]{12}$")
    return r.MatchString(uuid)
}

    Live example: https://play.golang.org/p/a4Z-Jn4EvG

    Note: as others have said, validating UUIDs with regular expressions can be slow. Consider other options too if you need better performance.