Check for server quota before trying to upload files

[tobiasKaminsky]

Situation:
A user creates a file within a local folder that is synchronized by her desktop client. That file is larger than the remaining free space of that user on the server. The remaining free space is correctly shown within the client UI.

Expected behavior:
The sync client recognizes that the file is larger than the remaining free space on the server. It does neither try to upload the file nor does it retry to upload the file, until sufficient free space is available on the server.

Actual behavior:
The sync client uploads the file anyways. The upload then fails at the end because there is not enough free space available for that particular user on the server. The sync client retries to upload after several minutes, over and over again.
This leads to several Mbit/s of bandwidth constantly being used by some users and Gigabytes of (the same) data that is transmitted and then discarded.

[itprostuff]

Is there any plan when this will be implemented?

[kurjajuur666]

Just had a user try and upload 25TB worth of data in a week with their quota full. Would be a pretty neat thing to have.

[i2h3]

@camilasan @mgallien @Rello Is this still missing in the classic sync? Does the client not check for free quota before uploading? Then maybe this can be merged with #9598.

[solracsf]

I've pushed 2 PR that may help on this:

nextcloud/groupfolders#4539
nextcloud/server#59398

[i2h3]

By the way, @camilasan said she implemented this last year for the classic sync.

[Rello]

Closing as completed after an automated backlog review. The classic upload path now checks the discovered remote quota before starting an upload and reports locally when the upload would exceed it. The repository also contains quota-specific sync coverage, so the behavior requested here is implemented.