assemblymade/coderwall

#TODO Find where this validator is used
class UriValidator < ActiveModel::EachValidator
  def validate_each(object, attribute, value)
    raise(ArgumentError, "A regular expression must be supplied as the :format option of the options hash") unless options[:format].nil? or options[:format].is_a?(Regexp)
    configuration = {message: "is invalid or not responding", format: URI::regexp(%w(http https))}
    configuration.update(options)

    if value =~ (configuration[:format])
      begin # check header response
        case Net::HTTP.get_response(URI.parse(value))
          when Net::HTTPSuccess, Net::HTTPRedirection then
            true
          else
            object.errors.add(attribute, configuration[:message]) and false
        end
      rescue # Recover on DNS failures..
        object.errors.add(attribute, configuration[:message]) and false
      end
    else
      object.errors.add(attribute, configuration[:message]) and false
    end
  end
end