I have a bucket with photos on AWS.
When I try to access the photo url {photoUrl = https://aws-name-dev.s3.amazonaws.com/photo.jpg} in browser I got 'access denied'.
When I create link with thumbor,
Thumbor thumbor = Thumbor.create(getResources().getString(R.string.thumbor_sever));
final String newUrl = thumbor.buildImage(photoUrl).resize(48, 48).toUrl();
and try to load it with Picasso, I got a '404 Not Found'.
If I replace photoUrl from aws with http://www.rizwanashraf.com/wp-content/uploads/2009/04/redrose7-wallpaper.jpg it is working.
I don't know how to, somehow, connect Thumbor server with AWS.
From AWS documentation you have to give permission to view/read files from your bucket.