Re: Efficient handling of denied CalDAV-Requests

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Jan Schneider wrote:

> Zitat von Jens Wahnes <[email protected]>:
>> in our setup, we have a number of users that use CalDAV to access both=

>> their own calendars and calendars that other users have shared with
>> them. Of the shared calendars, of course not all allow write access.
>>
>> When a CalDAV client tries to write to such a calendar for which it
>> does not have permissions, then of course access to it is denied and
>> the calendar remains unchanged.  However, there seem to be many
>> clients out there that repeat this kind of "unsuccessful" request over=

>> and over again.  That is, these clients to not get the fact that they
>> will never be able to write to the calendar and over time they send a
>> huge amount of requests that have to be denied each and every time.

> Maybe you could talk to the developers of the affected clients and ask
> them to support the current-user-privilege-set property that we
> propagate correctly according to the user's permissions on a share.

Thanks for the idea.  I'm afraid that this will be rather tough because=20
it's mostly (or even exclusively, I'd have to check) closed-source=20
applications that show this behaviour and I don't think their developers =

care much about the annoyance their software causes for some unrelated=20
server operator.

The most prominent example (i.e. the application that most such requests =

originate from) is Apple's OS X Calendaring tool which is probably meant =

to work with Apple's own calendar servers anyway.  Second place is=20
Blackberry's (RIM) OS 10 CalDAV client, which is most likely not being=20
developed at all any more, given the future of their Blackberry 10 OS.

Well, I still can hope for relief with the forthcoming release of=20
Kronolith that incorporates a newer version von SabreDAV. :)


Jens



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