Module: Regexifi::Email

Defined in:

lib/regexifi/email.rb

Constant Summary

DEVISE =

Used by a popular authentication gem Devise

/^([\w\.%\+\-]+)@([\w\-]+\.)+([\w]{2,})$/i.freeze

IDN =

Based on the Devise Regexp above, but actually UTF-8 / IDN friendly If you need to pass internationalized domains (IDN) - en.wikipedia.org/wiki/Internationalized_domain_name that use Cyrillic or Asian characters for example, this might be a better choice.

/^([[[:word:]]\.%\+\-]+)@([[[:word:]]\-]+\.)+([[:alpha:]]{2,})$/i.freeze

RAILS_TUTORIAL =

This is a commonly seen in Rails apps regex from Michael’s Hartl’s tutorial IT’s similar to DEVISE’s default Regex with slight modification ( not allowing 1-letter TLDs) Original = /A@[a-zd-](.)*.[a-z]z/ix.freeze

/\A[\w+\-.]+@[a-z\d\-]+(\.[a-z\d\-]+)*\.[a-z]{2,}+\z/i.freeze

WHATWG =

This is a standard developed by WHATWG - Web Hypertext Application Technology Working Group based on the RFC1123 standard that defines rules for domains. html.spec.whatwg.org/multipage/input.html#valid-e-mail-address

%r{^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+
@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?
(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$}ix.freeze

RFC5322 =

RFC1123 = /A(?<domain>(?!.254,)((((([A-Za-z0-9])()0,62.)*([A-Za-z]) ([A-Za-z0-9-])0,62))|((?:(?:25|2[0-9]|?[0-9]?).)3 (?:25|2[0-9]|?[0-9]?))))Z/ix

%r{\A(?<local>(([A-Za-z0-9!#\$%&'*\+\-/=\?\^_`\{\}\|~])+)(\.([A-Za-z0-9!#\$%&'*\+\-/=\?\^_`\{\}\|~])+)*)
@((?<domain>(?!.{254,})((((([A-Za-z0-9])([A-Za-z0-9\-]){0,62}\.)*([A-Za-z])([A-Za-z0-9\-]){0,62}))|
((?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)))))\Z}ix.freeze

RFC6068 =

RFC6068 defines the whole URI spec, but for out purposes here we just need email address REGEXP, which currently is defined as this /A+@[a-zA-Z0-9](?:0,61)? (?:.[a-zA-Z0-9](?:0,61)?)*z/ix However if you don’t have a compelling reason to spell it out, it is recommended to use REGEX defined in Ruby’s standard library

URI::MailTo::EMAIL_REGEXP