@aws-amplify/core
Version:
Core category of aws-amplify
26 lines (24 loc) • 949 B
JavaScript
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
/**
* Cache the payload of a response body. It allows multiple calls to the body,
* for example, when reading the body in both retry decider and error deserializer.
* Caching body is allowed here because we call the body accessor(blob(), json(),
* etc.) when body is small or streaming implementation is not available(RN).
*
* @internal
*/
const withMemoization = (payloadAccessor) => {
let cached;
return () => {
if (!cached) {
// Explicitly not awaiting. Intermediate await would add overhead and
// introduce a possible race in the event that this wrapper is called
// again before the first `payloadAccessor` call resolves.
cached = payloadAccessor();
}
return cached;
};
};
export { withMemoization };
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