Handle in-progress uploads when study ends unexpectedly

[becky-gilbert]

Summary

Attempt to abort any unfinished video recording uploads to S3 when the participant's browser is closed.

Description

The new RecordRTC video recording system is using AWS' S3 multi-part upload tools. This means that we need to call 'complete' on the video upload when recording is finished. However, sometimes the study might end unexpectedly before it has a chance to call the complete function (e.g. if the participant closes the browser), and if we don't abort or complete an upload, we're still charged for the parts that were uploaded. One way to address this is to try to quickly handle any in-progress video uploads when the browser is closing.

Implementation

We could consider having EFP try to either complete or abort any in-progress uploads when the study ends unexpectedly.

Also, S3 might have a "timeout" setting that we could use to remove "abandoned" multipart uploads.