@foal/core/lib/common/encoding/convert-base64-url-to-base64.js

Full-featured Node.js framework, with no complexity

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.convertBase64urlToBase64 = convertBase64urlToBase64;
function addPaddingToBase64url(str) {
    if (str.length % 4 === 1) {
        throw new TypeError('The provided base64url-encoded string has an incorrect length.');
    }
    if (str.length % 4 === 2) {
        return str + '==';
    }
    if (str.length % 4 === 3) {
        return str + '=';
    }
    return str;
}
/**
 * Converts a base64url-encoded string into a base64-encoded string.
 *
 * @export
 * @param {string} str The base64url-encoded string.
 * @returns {string} The base64-encoded string.
 */
function convertBase64urlToBase64(str) {
    return addPaddingToBase64url(str)
        .replace(/\-/g, '+')
        .replace(/_/g, '/');
}