@aws-amplify/storage
Version:
Storage category of aws-amplify
30 lines (27 loc) • 1.33 kB
JavaScript
import { getDataChunker } from '../apis/internal/uploadData/multipart/getDataChunker.mjs';
import { calculateContentCRC32 } from './crc32.mjs';
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
/**
* Calculates a combined CRC32 checksum for the given data.
*
* This function chunks the input data, calculates CRC32 for each chunk,
* and then combines these checksums into a single value.
*
* @async
* @param {StorageUploadDataPayload} data - The data to calculate the checksum for.
* @param {number | undefined} size - The size of each chunk. If undefined, a default chunk size will be used.
* @returns {Promise<string>} A promise that resolves to a string containing the combined CRC32 checksum
* and the number of chunks, separated by a hyphen.
*/
const getCombinedCrc32 = async (data, size) => {
const crc32List = [];
const dataChunker = getDataChunker(data, size);
for (const { data: checkData } of dataChunker) {
const { checksumArrayBuffer } = await calculateContentCRC32(checkData);
crc32List.push(checksumArrayBuffer);
}
return `${(await calculateContentCRC32(new Blob(crc32List))).checksum}-${crc32List.length}`;
};
export { getCombinedCrc32 };
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