def is_proxy_runnable(self, resp):
        # SLO / proxy only case:
        # storlet to be invoked now at proxy side:
        runnable = any(
            [self.is_storlet_range_request, self.is_slo_response(resp),
             self.conf['storlet_execute_on_proxy_only']])
        return runnable
Check if the storlet should be executed at proxy server
dataset/ETHPy150Open openstack/storlets/Engine/swift/storlet_middleware/storlet_handler.py/StorletProxyHandler.is_proxy_runnable