38 lines
1.2 KiB
Plaintext
38 lines
1.2 KiB
Plaintext
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import { encoder, decoder } from '../lib/buffer_utils.js';
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export const encodeBase64 = (input) => {
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let unencoded = input;
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if (typeof unencoded === 'string') {
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unencoded = encoder.encode(unencoded);
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}
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const CHUNK_SIZE = 0x8000;
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const arr = [];
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for (let i = 0; i < unencoded.length; i += CHUNK_SIZE) {
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arr.push(String.fromCharCode.apply(null, unencoded.subarray(i, i + CHUNK_SIZE)));
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}
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return btoa(arr.join(''));
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};
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export const encode = (input) => {
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return encodeBase64(input).replace(/=/g, '').replace(/\+/g, '-').replace(/\//g, '_');
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};
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export const decodeBase64 = (encoded) => {
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const binary = atob(encoded);
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const bytes = new Uint8Array(binary.length);
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for (let i = 0; i < binary.length; i++) {
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bytes[i] = binary.charCodeAt(i);
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}
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return bytes;
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};
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export const decode = (input) => {
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let encoded = input;
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if (encoded instanceof Uint8Array) {
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encoded = decoder.decode(encoded);
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}
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encoded = encoded.replace(/-/g, '+').replace(/_/g, '/').replace(/\s/g, '');
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try {
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return decodeBase64(encoded);
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}
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catch {
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throw new TypeError('The input to be decoded is not correctly encoded.');
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}
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};
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