Credit to @fansaien. S3 supports generating temporaryUrls to files that don't exist yet so this adds a check to make sure temp URLs are only generated for valid files.
Adds support to retrieve protected files using the class they are defined to be using if that class differs from the default System\Models\File class. This makes it possible to use a custom class extending the base file model class that does output processing on the file data (for example, an EncryptedFile class that has to decrypt the file contents before they can be output to the browser).
Ben Thomson
fansaien
Luke Towers
Luke Towers
Quezler
Samuel Georges