[caldeveloper-l] CalDAV client using un-parsable request

[Cristian Draghici]

Hello

How do those of you that write CalDAV servers handle non standard VCALENDAR
requests?

Case in point, the latest Calendar.app on macOS Sierra 10.12.4 uses non
standard property parameter "TO-ALL-PROPOSED-NEW-TIME" to propose new time.
E.g.

ATTENDEE;CUTYPE=INDIVIDUAL;PARTSTAT=TENTATIVE;TO-ALL-PROPOSED-NEW-TIME="
 DTSTART:20170512T060000Z;STATUS:NEEDS-ACTION;":mailto:x at y.z

I have not found any RFC or draft describing this property parameter.
I imagine the client is asking for the equivalent of a METHOD=COUNTER since
these do not exist in CalDAV.

In these cases do you just interpret what the client is trying to achieve
and change your server accordingly?

Thank you,
Cristi
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