@aws-amplify/storage
Version:
Storage category of aws-amplify
32 lines (30 loc) • 1.49 kB
JavaScript
;
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
Object.defineProperty(exports, "__esModule", { value: true });
exports.getCombinedCrc32 = void 0;
const getDataChunker_1 = require("../apis/internal/uploadData/multipart/getDataChunker");
const crc32_1 = require("./crc32");
/**
* 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 = (0, getDataChunker_1.getDataChunker)(data, size);
for (const { data: checkData } of dataChunker) {
const { checksumArrayBuffer } = await (0, crc32_1.calculateContentCRC32)(checkData);
crc32List.push(checksumArrayBuffer);
}
return `${(await (0, crc32_1.calculateContentCRC32)(new Blob(crc32List))).checksum}-${crc32List.length}`;
};
exports.getCombinedCrc32 = getCombinedCrc32;
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