Caching file uploads on S3 using knox for node.js

gistfile1.js

var knox = require('knox');
var s3client = knox.createClient({
    key: 'KEY GOES HERE',
    secret: 'SECRET GOES HERE',
    bucket: 'BUCKET NAME GOES HERE'
});
var fileHeaders = {
    'Cache-Control': 'public,max-age=290304000'
};

var source = '/tmp/file.jpg';
var destination = '/chomps/file.jpg';

s3client.putFile(source, destination, fileHeaders, function(err, res){
    // Completed upload
});