js-base64-extend/src/extend.js

基于base64上扩展，增加设置key，支持node和浏览器端

// https://www.npmjs.com/package/js-base64
import base64 from 'js-base64';

var __key = '69/2+34=85710',
    __key2 = 'qwertySDXCVBNuiopajFGHJKLZklzxcvbnmQWERTYsdfghUIOPAM',
    __key3 = __key + __key2,

    randomText = function (min, max) {
        var str = '',
            arr = __key2['split'](''),
            pos;

        min = Math.round(Math.random() * (max - min)) + min;
        for (let i = 0; i < min; i++) {
            pos = Math.round(Math.random() * (arr.length - 1));
            str += arr[pos];
        }
        return str;
    };

export default {
    setCharsKey(k) {
        __key3 = k + __key3;
    },

    encode: function (string) {
        string = base64.Base64.encode(string).split('');
        var newBase64 = [];
        string.forEach(function (item) {

            var index = __key3.indexOf(item);
            if (index > -1) {
                newBase64.push(index);
            } else {
                newBase64.push(item);
            }
        });
        return randomText(1, 10) + newBase64.join('_').replace(/_/g, function () {
            return randomText(1, 5);
        }) + randomText(1, 10);
    },
    decode: function (string) {
        string = string.replace(/[A-z]+/g, '_')['split']('_');
        var newString = [];
        string.forEach(function (item) {

            if (typeof parseInt(item) === 'number' && !isNaN(parseInt(item))) {
                newString.push(__key3[parseInt(item)]);
            } else {
                newString.push(item);
            }
        });
        return base64.Base64.decode(newString.join(''));
    }
};