🔢 Implement server-side DAV pagination

[sorbaugh]

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Description

Currently, iOS is limited in execution time and data/memory consumption. There is very little available memory and a PROPFIND of a few hundred records is enough to cause an overflow. Therefore, not having pagination, every time a single item changes you have to reload the entire folder with an incalculable waste of time and resources.

Something like a limit to 50 files per query/run would be good.

There are 3 closed PRs that wanted to tackle this problem, we could think of a new approach or "revive" this one if it's more pragmatic.

https://github.com/sabre-io/dav/pull/1074/files

nextcloud/3rdparty#139

#10880

[susnux]

Exchange seems to have this feature:
https://docs.microsoft.com/zh-cn/previous-versions/office/developer/exchange-server-2003/aa123634(v=exchg.65)

[sorbaugh]

Update:

@icewind1991 's PR on sabre/dav to handle pagination has been since merged: sabre-io/dav#1074

However we're still waiting for a release to be made on their side. After this is done, we have 2 things to do:

1. Bump the sabre/dav version
2. Revive the logic from this PR and merge it: A dav plugin to allow pagination of multipart responses #10880

IF no new release is made on sabre's side, the approach would be:

1. Bump the sabre/dav version to have only minimal differences.
   1.1 Apply icewind's PR on the lib version we're using
2. Revive the logic from this PR and merge it: A dav plugin to allow pagination of multipart responses #10880

cc @Altahrim

cc @tobiasKaminsky @marinofaggiana

[marinofaggiana]

thanks, we wait confidently

[tobiasKaminsky]

@Altahrim is there a documentation already available at docs.nextcloud.com?

[Altahrim]

Not yet