Node base64 decode

tester.js

console.log('Hello, World!');
var fs = require('fs');
var amqp = require('amqp');

var connection = amqp.createConnection({ url: 'amqp://subbydev/base64tests' });

// Wait for connection to become established.
connection.on('ready', function () {
    // Create a queue and bind to all messages.
    // Use the default 'amq.topic' exchange
    connection.queue('file_packages', {durable: true, autoDelete: false}, function(q){
        // Catch all messages
        q.bind('base64_payloads', 'payloadmessage');

        // Receive messages
        q.subscribe(function (message) {
            // Print messages to stdout
            var base64String = message.data.toString('utf8');
            console.log(base64String);
            var decoded = new Buffer(base64String, 'base64');
            fs.writeFile('temp.pdf', decoded, function(err) {});
        });
    });
});