Fixes#16876
Before we'd just fetch everything from all storages we'd have access to.
Then we'd sort. And filter in php. Now this of course is tricky if a
user shared just a file with you and then has a ton of activity.
Now we try to contruct the prefix path. So that the filtering can happen
right away in the databae.
Now this will make the DB more busy. But it should help overall as in
most cases less queries are needed then etc.
Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>
Currently if the following situation happens
Server generates preview
Server has command removed which allows a preview to be shown
Client asks for preview, gets a 404 error when preview exists
(Mime checked before preview)
This happens more often with documents, or video as the commands are not
native PHP, they require a binary on the server.
After the fix the following would happen
Server generates preview
Server has command removed which allows a preview to be shown
Client asks for preview, gets preview which has been generated
(Mime checked after preview)
This would also allow offline generation (for example a docker image
containing the extra binaries), allowing a reduction in attack surface
of the instance serving the preview data.
Signed-off-by: Scott Dutton <scott@exussum.co.uk>
in some cases `loadApp` is called more then once which is currently causing apps to be "booted" multiple times which can lead to unexepected behaviour with things like registering hooks
Signed-off-by: Robin Appelman <robin@icewind.nl>
* introduces a new IRootMountProvider to register mount points inside the root storage
* adds a AppdataPreviewObjectStoreStorage to handle the split between preview folders and bucket number
Ref #22033
Signed-off-by: Morris Jobke <hey@morrisjobke.de>
* `php occ preview:repair` - a preview migration tool that moves existing previews into the new location introduced with #19214
* moves `appdata_INSTANCEID/previews/FILEID` to `appdata_INSTANCEID/previews/0/5/8/4/c/e/5/FILEID`
* migration tool can be stopped during migration via `CTRL+C` - it then finishes the current folder (with the previews of one file) and stops gracefully
* if a PHP memory limit is set in the `php.ini` then it will stop automatically once it has less than 25 MiB memory left (this is to avoid hard crashes in the middle of a migration)
* the tool can be used during operation - possible drawbacks:
* there is the chance of a race condition that a new preview is generated in the moment the folder is already migrated away - so the old folder with the newly cached preview is deleted and one cached preview needs to be re-generated
* there is the chance of a race condition during access of a preview while it is migrated to the other folder - then no preview can be shown and results in a 404 (as of now this is an accepted risk)
Signed-off-by: Morris Jobke <hey@morrisjobke.de>
Joas Schilling
Nextcloud bot
Roeland Jago Douma
John Molakvoæ
Roeland Jago Douma
Morris Jobke
Daniel Kesselberg
Georg Ehrke
Gary Kim
Scott Dutton
Robin Appelman
John Molakvoæ (skjnldsv)
Julius Härtl