def get_secure_cookie(self, name, value=None, max_age_days=31,
                          min_version=None):
        self.require_setting("cookie_secret", "secure cookies")
        if value is None:
            value = self.get_cookie(name)
        return decode_signed_value(self.application.settings["cookie_secret"],
                                   name, value, max_age_days=max_age_days,
                                   min_version=min_version)
Returns the given signed cookie if it validates, or None.
dataset/ETHPy150Open RobotWebTools/rosbridge_suite/rosbridge_server/src/tornado/web.py/RequestHandler.get_secure_cookie