Following the Direct Publisher tutorial, everything works as expected as long as I use the feed URL provided. To begin customizing, I want to place that feed on Dropbox or preferably an S3 folder. That's where I'm stumped. I'm copying and pasting the feed contents from my browser into Notepad++ but no matter what I name it (.json, .xml, .rss, .html) the file is not recognized as valid. The URL is seen from Dropbox, but not from S3, even though I've made it public.
Forgive the newbish question, but what the heck am I doing wrong?