Re: [Evolution-hackers] Need help debugging owncloud caldav problem

[James Bottomley <James Bottomley HansenPartnership com>]

On Tue, 2015-11-24 at 18:32 +0100, Milan Crha wrote:
> On Tue, 2015-11-24 at 15:17 +0300, James Bottomley wrote:
> > DTSTART;TZID=America/Los_Angeles:20131024T180000
> > DTEND;TZID="America/Los_Angeles;VALUE=":20131024T200000
> >
> > Removing the quotes and the spurious ;VALUE= for the DTEND TZID causes
> > the event to become visible when evolution is restarted.  So, it looks
> > like something in the caldav connector is adding bogus data to the TZID
> > information.
>
>       Hi,
> I agree with you, the empty VALUE= should not be there. How the quotes
> got around it is another question.

OK, so I found the reason for this.  There's a bug in the owncloud
calendar importer that adds an empty VALUE= label to DTEND

https://github.com/owncloud/calendar/issues/991

However, this doesn't excuse evolution's handling of it, because every
other caldav implementation silently ignores this whereas we mangle it
into a potentially unreadable timezone and then drop the event.  The
mangling seems to occur as part of the back end caching and is likely
the fault of libical.  I'll see if I can work out how to fix it.

James