class UrlFormatValidator < ActiveModel::EachValidator def validate_each(record, attribute, value) value = format_value(record, attribute, value) unless URI.parse(value).kind_of?(URI::HTTP) && value =~ url_regexp record.errors[attribute] << (options[:message] || "is invalid") end rescue URI::InvalidURIError record.errors[attribute] << (options[:message] || "is invalid") end def format_value(record, attribute, value) record.send("#{attribute}=",UrlFormat.ensure_http_prefix(value)) end # Thanks to Dean Perry and Ryan Bates # https://github.com/deanperry/url_formatter/blob/master/lib/url_formatter.rb def url_regexp /\Ahttps?:\/\/([\A\s:@]+:[\A\s:@]*@)?[-[[:alnum:]]]+(\.[-[[:alnum:]]]+)+\.?(:\d{1,5})?([\/?]\S*)?\z/iux end end