my util.js , some helpers for javascript modules

util.js

/**
 * Created by beka on 4/10/16.
 */

module.exports = {

    base64_encode: function (file){
        var fs = require('fs');
        var bitmap = fs.readFileSync(file);
        return new Buffer(bitmap).toString('base64');
    },

    base64_decode : function(base64str, file){
        var fs = require('fs');
        var bitmap = new Buffer(base64str, 'base64');
        fs.writeFileSync(file, bitmap);
        // console.log('******** File created from base64 encoded string ********');
    },

    remove_file : function(file){

        var fs = require('fs');
        fs.unlink(file);
    },

    random_file_name : function(len){

        return randomstring.generate(len);
    },

    getParameterByName : function(name, url) {

        if (!url) url = window.location.href;
        name = name.replace(/[\[\]]/g, "\\$&");
        var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)", "i"),
            results = regex.exec(url);
        if (!results) return null;
        if (!results[2]) return '';
        return decodeURIComponent(results[2].replace(/\+/g, " "));
    }

};