API: Download all assignment submissions?
Does the Canvas API provide an entry for downloading all submissions for an assignment as a single file? I see that's available in the Canvas UI. Instructors can click a link to download all submissions as a single ZIP file.
I maintain a program that occasionally needs to download all submissions for specific assignments. Sometimes the course size is large (1800+ students). Downloading each submission takes at least two HTTP requests. When all/most of the students of a large course make submissions for an assignment, then that means 3600+ requests are being made. This can take several minutes to complete (I timed it at 18+ minutes one time).
I've looked through the Canvas Live API for an entry to download all submissions, but I didn't find one. Does anyone know if such a thing exists?
Bonus: This goes along with an earlier question I asked about getting submissions as PDF. If it were possible to download all assignment submissions as PDFs in a single ZIP file, that would be even better.