Edit File: base64-arraybuffer.js
"use strict"; Object.defineProperty(exports, "__esModule", { value: true }); exports.decode = exports.encode = void 0; // imported from https://github.com/socketio/base64-arraybuffer const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'; // Use a lookup table to find the index. const lookup = typeof Uint8Array === 'undefined' ? [] : new Uint8Array(256); for (let i = 0; i < chars.length; i++) { lookup[chars.charCodeAt(i)] = i; } const encode = (arraybuffer) => { let bytes = new Uint8Array(arraybuffer), i, len = bytes.length, base64 = ''; for (i = 0; i < len; i += 3) { base64 += chars[bytes[i] >> 2]; base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)]; base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)]; base64 += chars[bytes[i + 2] & 63]; } if (len % 3 === 2) { base64 = base64.substring(0, base64.length - 1) + '='; } else if (len % 3 === 1) { base64 = base64.substring(0, base64.length - 2) + '=='; } return base64; }; exports.encode = encode; const decode = (base64) => { let bufferLength = base64.length * 0.75, len = base64.length, i, p = 0, encoded1, encoded2, encoded3, encoded4; if (base64[base64.length - 1] === '=') { bufferLength--; if (base64[base64.length - 2] === '=') { bufferLength--; } } const arraybuffer = new ArrayBuffer(bufferLength), bytes = new Uint8Array(arraybuffer); for (i = 0; i < len; i += 4) { encoded1 = lookup[base64.charCodeAt(i)]; encoded2 = lookup[base64.charCodeAt(i + 1)]; encoded3 = lookup[base64.charCodeAt(i + 2)]; encoded4 = lookup[base64.charCodeAt(i + 3)]; bytes[p++] = (encoded1 << 2) | (encoded2 >> 4); bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2); bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63); } return arraybuffer; }; exports.decode = decode;
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