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# UrlValidator
#
# Custom validator for URLs.
#
# By default, only URLs for the HTTP(S) protocols will be considered valid.
# Provide a `:protocols` option to configure accepted protocols.
#
# Example:
#
# class User < ActiveRecord::Base
# validates :personal_url, url: true
#
# validates :ftp_url, url: { protocols: %w(ftp) }
#
# validates :git_url, url: { protocols: %w(http https ssh git) }
# end
#
class UrlValidator < ActiveModel::EachValidator
def validate_each(record, attribute, value)
unless valid_url?(value)
record.errors.add(attribute, "must be a valid URL")
end
end
private
def default_options
@default_options ||= { protocols: %w[http https] }
end
def valid_url?(value)
return false if value.nil?
options = default_options.merge(self.options)
value.strip!
value =~ /\A#{URI.regexp(options[:protocols])}\z/
end
end
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