@aws-amplify/storage
Version:
Storage category of aws-amplify
54 lines (52 loc) • 2 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.getDataChunker = void 0;
const validation_1 = require("../../../../../../errors/types/validation");
const StorageError_1 = require("../../../../../../errors/StorageError");
const calculatePartSize_1 = require("./calculatePartSize");
const getDataChunker = (data, totalSize) => {
const partSize = (0, calculatePartSize_1.calculatePartSize)(totalSize);
if (data instanceof Blob) {
return helper(data, 0, data.size, partSize);
}
else if (ArrayBuffer.isView(data)) {
return helper(data.buffer, data.byteOffset, data.byteLength, partSize);
}
else if (data instanceof ArrayBuffer) {
return helper(data, 0, data.byteLength, partSize);
}
else if (typeof data === 'string') {
const blob = new Blob([data]);
return (0, exports.getDataChunker)(blob, blob.size);
}
else {
throw new StorageError_1.StorageError({
name: validation_1.StorageValidationErrorCode.InvalidUploadSource,
...validation_1.validationErrorMap[validation_1.StorageValidationErrorCode.InvalidUploadSource],
});
}
};
exports.getDataChunker = getDataChunker;
const helper = function* (buffer, byteOffset, byteLength, partSize) {
let partNumber = 1;
let startByte = byteOffset;
let endByte = byteOffset + Math.min(partSize, byteLength);
while (endByte < byteLength + byteOffset) {
yield {
partNumber,
data: buffer.slice(startByte, endByte),
size: partSize,
};
partNumber += 1;
startByte = endByte;
endByte = startByte + partSize;
}
yield {
partNumber,
data: buffer.slice(startByte, byteLength + byteOffset),
size: byteLength + byteOffset - startByte,
};
};
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