title: Grant Pre-signed style url access to whole directory
body: <p>I have a node app and am using the <code>aws-sdk</code>. I'm able to successfully call the <code>getSignedUrl()</code> method and get a URL to a specific file. However I'd like to be able to grant <code>*</code> access recursively inside a specific directory rather than just a single file. Is this even possible?</p>