Fix an exception when trying to fetch source data for URLs like
https://va.media.tumblr.com/tumblr_pgohk0TjhS1u7mrsl.mp4.
For these URLs it's not possible to use the trick where we try to open
the URL as a HTML page and scrape the post id from the HTML. Instead we
get the raw video if we try to to this.
This directory contains library code used through Danbooru. This includes things like defining API clients, dealing with
sources, parsing tag searches, storing and resizing images, and so on.
Many of the files here use the Service Object pattern. Instead of putting complex code in models or controllers, it goes
here, in plain old Ruby objects (POROs). This keeps models and controllers simpler, and keeps domain logic isolated and
independent from the database and the HTTP request cycle.