If I understood your requirement correctly, there was a Wordpress plugin that did similar (if you don't mind running a Wordpress instance though). It's supposed

If I understood your requirement correctly, there was a Wordpress plugin that did similar (if you don't mind running a Wordpress instance though). It's supposed to be OSS as well, so I guess there's copies of the source available elsewhere too. In any case if you'd like to purchase their official license: https://easydigitaldownloads.com/downloads/software-licensing/ https://easydigitaldownloads.com/downloads/software-licensin...