Upload not resuming unless we give a chunk size

[therealabdi2]

I've encountered an issue with the tus-js-client library where the upload process restarts from the beginning if there's an interruption due to a bad internet connection. This behavior occurs only when a chunk size is not specified. Specifying a chunk size prevents the issue but adversely affects the upload speed as described in the tus-js-client API documentation.

I suspect the issue may be related to the upload_offset not being updated on the backend after an internet disruption.

Steps to Reproduce:

Use the tus-js-client library to initiate an upload to the server. (Reference: tus-js-client)
During the upload, simulate an internet disruption (e.g., turn off the network connection).
Re-establish the internet connection and observe the behavior of the upload process.
Expected Result: The upload should resume from the last successful upload_offset.

Actual Result: The upload restarts from 0%.

Suggested Possible Fix: Review how upload_offset is managed in scenarios of internet reconnection and ensure it is properly updated to allow resuming uploads.

[dirkmoors]

Hello, feel free to provide a patch to mitigate that behavior. I'll review, and create a new release.