serverless-spy
Version:
CDK-based library for writing elegant integration tests on AWS serverless architecture and an additional web console to monitor events in real time.
21 lines (20 loc) • 854 B
JavaScript
import { isArrayBuffer } from "@smithy/is-array-buffer";
import { toHex } from "@smithy/util-hex-encoding";
import { toUint8Array } from "@smithy/util-utf8";
import { SHA256_HEADER, UNSIGNED_PAYLOAD } from "./constants";
export const getPayloadHash = async ({ headers, body }, hashConstructor) => {
for (const headerName of Object.keys(headers)) {
if (headerName.toLowerCase() === SHA256_HEADER) {
return headers[headerName];
}
}
if (body == undefined) {
return "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855";
}
else if (typeof body === "string" || ArrayBuffer.isView(body) || isArrayBuffer(body)) {
const hashCtor = new hashConstructor();
hashCtor.update(toUint8Array(body));
return toHex(await hashCtor.digest());
}
return UNSIGNED_PAYLOAD;
};