module Rack
  module Auth
    # Rack::Auth::AbstractHandler implements common authentication functionality.
    #
    # +realm+ should be set for all handlers.

    class AbstractHandler

      attr_accessor :realm

      def initialize(app, realm=nil, &authenticator)
        @app, @realm, @authenticator = app, realm, authenticator
      end


      private

      def unauthorized(www_authenticate = challenge)
        return [ 401,
          { CONTENT_TYPE => 'text/plain',
            CONTENT_LENGTH => '0',
            'WWW-Authenticate' => www_authenticate.to_s },
          []
        ]
      end

      def bad_request
        return [ 400,
          { CONTENT_TYPE => 'text/plain',
            CONTENT_LENGTH => '0' },
          []
        ]
      end

    end
  end
end