Properly enabling security for filepicker.io in Meteor
问题 Filepicker by default allows pretty much everybody to add files to your S3 bucket who was clever enough to copy your API key out of the client code and luckily also offers a security option with expiring policies. But I have no idea how to implement this in Meteor.js. Tried back and forth, installing meteor-crypto-base package, trying to generate the hashes on the server, tried RGBboy's urlsafe-base64 algorithm on https://github.com/RGBboy/urlsafe-base64. But I just do not get any further.