Hi Filippo,

I've updated the changeset to support both cURL hits and rendering inside the job. Sadly it seems like cURL hits also need to be a job, because I tried sending a fire-and-forget HEAD request (with a Connection: Close header) and that wasn't enough to trigger the thumbnail generation. Thus the cURL request has to wait for completion, and a result is inside a job in order to avoid the upload script hanging while the thumbs are being generated. The upside is that the job that sends the cURL requests could be rate-limited.

Mostly the sizes used by Media Viewer and probably the most common thumbnail sizes found in articles as well. I'm open to suggestions regarding how many different sizes should be pregenerated and which ones would be reasonable to pick. I guess maybe it's best to start with a minimal set and then expand it later if the resource usage is reasonable?