title: Heroku Node.js Amazon S3 direct upload tutorial - SignatureDoesNotMatch
body: <p>Why does the Heroku Nodejs AWS S3 tutorial (<a href="https://devcenter.heroku.com/articles/s3-upload-node" rel="nofollow">https://devcenter.heroku.com/articles/s3-upload-node</a>) fail when a plus '+' character is present in the signature?</p>