app/validators/characters_validator.rb

   1 class CharactersValidator < ActiveModel::EachValidator
   2   INVALID_CHARS = "\x00-\x08\x0b-\x0c\x0e-\x1f\x7f\ufffe\uffff".freeze
   3   INVALID_URL_CHARS = "/;.,?%#".freeze
   4
   5   def validate_each(record, attribute, value)
   6     record.errors[attribute] << (options[:message] || I18n.t("validations.invalid_characters")) if /[#{INVALID_CHARS}]/o.match?(value)
   7     record.errors[attribute] << (options[:message] || I18n.t("validations.url_characters", :characters => INVALID_URL_CHARS)) if options[:url_safe] && /[#{INVALID_URL_CHARS}]/o.match?(value)
   8   end
   9 end