创建 tornado.web.Application

def _get_webapp(self):
        """
            创建 tornado.web.Application
        """
        settings = {
            "PORT"          : self._port,
            #"static_path"   : app_path(__conf__.STATIC_DIR_NAME),
            #"template_path" : app_path(__conf__.TEMPLATE_DIR_NAME),
            "debug"         : __conf__.DEBUG,
            "cookie_secret" : __conf__.COOKIE_SECRET
        }

        self.settings.update(settings)
        return WebApplication(self._handlers, **settings)