32 строки
902 B
JavaScript
32 строки
902 B
JavaScript
/**
|
|
* Copyright (c) Facebook, Inc. and its affiliates.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*
|
|
* @format
|
|
* @flow strict
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
const base64 = require('base64-js');
|
|
|
|
function binaryToBase64(data: ArrayBuffer | $ArrayBufferView): string {
|
|
if (data instanceof ArrayBuffer) {
|
|
// $FlowFixMe[reassign-const]
|
|
data = new Uint8Array(data);
|
|
}
|
|
if (data instanceof Uint8Array) {
|
|
return base64.fromByteArray(data);
|
|
}
|
|
if (!ArrayBuffer.isView(data)) {
|
|
throw new Error('data must be ArrayBuffer or typed array');
|
|
}
|
|
// Already checked that `data` is `DataView` in `ArrayBuffer.isView(data)`
|
|
const {buffer, byteOffset, byteLength} = ((data: $FlowFixMe): DataView);
|
|
return base64.fromByteArray(new Uint8Array(buffer, byteOffset, byteLength));
|
|
}
|
|
|
|
module.exports = binaryToBase64;
|