var AwsSign = require('aws-sign');
var signer = new AwsSign({
accessKeyId: 'AKIAIOSFODNN7EXAMPLE',
secretAccessKey: 'wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY'
});
var authorization = signer.sign({
method: 'PUT',
bucket: 'johnsmith',
path: '/photos/puppy.jpg',
});