Synnefo

    def _has_read_access(self, user, path):

        try:

            account, container, object = path.split('/', 2)

        except ValueError:

            raise ValueError('Invalid object path')

        assert isinstance(user, basestring), "Invalid user"

        try:

            self._can_read(user, account, container, object)

        except NotAllowedError:

            return False

        else:

            return True