Generate random strings with crypto.randomBytes

shortid.js

'use strict';

var crypto = require('crypto');
var stream = require('stream');

function radixId (radix, callback) {
    crypto.randomBytes(4, function (err, buf) {
        if (err) { return callback(err); }

        try {
            callback(null, buf.readUInt32LE(0).toString(radix));
        } catch (e) {
            callback(e);
        }
    });
}

var shortId = radixId.bind(this, 36);

shortId(function (err, hash) {
    if (err) { throw err; }
    console.log('shortId:\t%s', hash);
});


function bufId (n, encoding, callback) {
    if (typeof encoding === 'function') {
        callback = encoding;
        encoding = 'hex';
    }

    crypto.randomBytes(n, function (err, buf) {
        if (err) { return callback(err); }
        callback(null, buf.toString(encoding));
    });
}

bufId(8, 'base64', function (err, hash) {
    if (err) { throw err; }
    console.log('bufId:\t%s', hash);
});