MODX + Amazon S3 + CloudFront + Signed URLs (phew!)

Just wondering if anyone has used MODX with the Amazon CloudFront CDN to serve up PDFs / digital assets but then protected those assets with signed URLs.

And if so, how did you generated those URLs and pass them your PDFs via MODX ?

http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/private-content-signed-urls-overview.html

Apologies if that doesn't make complete sense. Just getting used to the lingo myself

Doesn't look complicated. You need to create the keys, then append them to the base URL. There's even a PHP function to do it. It shouldn't be hard to use weblinks with a couple of TVs for the time and the JSON string (you could use a MIGx TV for that one; it automatically saves to JSON). Then use a plugin with the PHP code to append the key/value pairs to the URL before saving. http://aws.amazon.com/code/CloudFront/3514

Reading through the docs at the moment. I'd go down the Static Resource route restricted to UserGroups but there are just too many (files).
Thanks Susan

Hm. Are the files all in an organized file structure? It might be possible to use a snippet to process the file structure and generate the links automatically. Perhaps something like FileDownload R, which even has a plugin so you would be able to generate the proper secured links.