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39 lines
927 B
Plaintext
39 lines
927 B
Plaintext
/**
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* @file 二进制byte流转base64编码
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* @author mengke01(kekee000@gmail.com)
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*/
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/**
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* 二进制byte流转base64编码
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*
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* @param {ArrayBuffer|Array} buffer ArrayBuffer对象
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* @return {string} base64编码
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*/
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export default function bytes2base64(buffer) {
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let str = '';
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let length;
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let i;
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// ArrayBuffer
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if (buffer instanceof ArrayBuffer) {
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length = buffer.byteLength;
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const view = new DataView(buffer, 0, length);
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for (i = 0; i < length; i++) {
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str += String.fromCharCode(view.getUint8(i, false));
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}
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}
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// Array
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else if (buffer.length) {
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length = buffer.length;
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for (i = 0; i < length; i++) {
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str += String.fromCharCode(buffer[i]);
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}
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}
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if (!str) {
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return '';
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}
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return typeof btoa !== 'undefined'
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? btoa(str)
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: Buffer.from(str, 'binary').toString('base64');
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}
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