firebase-auth-cloudflare-workers/dist/module/base64.js

Zero-dependencies firebase auth library for Cloudflare Workers.

import { utf8Encoder } from './utf8';
export const decodeBase64Url = (str) => {
    return decodeBase64(str.replace(/_|-/g, m => ({ _: '/', '-': '+' })[m] ?? m));
};
export const encodeBase64Url = (buf) => encodeBase64(buf).replace(/\/|\+/g, m => ({ '/': '_', '+': '-' })[m] ?? m);
// This approach is written in MDN.
// btoa does not support utf-8 characters. So we need a little bit hack.
export const encodeBase64 = (buf) => {
    const binary = String.fromCharCode(...new Uint8Array(buf));
    return btoa(binary);
};
// atob does not support utf-8 characters. So we need a little bit hack.
export const decodeBase64 = (str) => {
    const binary = atob(str);
    const bytes = new Uint8Array(new ArrayBuffer(binary.length));
    const half = binary.length / 2;
    for (let i = 0, j = binary.length - 1; i <= half; i++, j--) {
        bytes[i] = binary.charCodeAt(i);
        bytes[j] = binary.charCodeAt(j);
    }
    return bytes;
};
const jsonUTF8Stringify = (obj) => utf8Encoder.encode(JSON.stringify(obj));
export const encodeObjectBase64Url = (obj) => encodeBase64Url(jsonUTF8Stringify(obj).buffer);