asterisk users - Aug 2013 - res_calendar / ownCloud

Hi,

I try to use res_calendar with ownCloud. While it works with google/ics, 
I've some difficulties with caldav and ownCloud[1]. According to the 
logs and tcpdump the calendar entries have been fetched but they are not 
available in Asterisk. 'calendar show calendars' doesn't show the
status
busy,  'calendar show calendar owncloud' doesn't show the current 
events. I also don't get any result with 
CALENDAR_QUERY/CALENDAR_QUERY_RESULT. I haven't seen any special error 
message (core set verbose 10) while reloading the config and fetching 
the calendar entries.

On the wire I see the following answer from the ownlcloud server.:

<?xml version="1.0" encoding="utf-8"?>
<d:multistatus xmlns:d="DAV:"
xmlns:s="http://sabredav.org/ns"
xmlns:cal="urn:ietf:params:xml:ns:caldav" 
xmlns:cs="http://calendarserver.org/ns/"><d:response><d:href>/remote.php/caldav/calendars/9e681f76-d67d-102d-9eb3-333258c8c572/defaultcalendar/owncloud-47307eef251636b6b3c7d8119a4bdf01.ics</d:href><d:propstat><d:prop><cal:calendar-data>BEGIN:VCALENDAR&#13;
VERSION:2.0&#13;
PRODID:ownCloud Calendar&#13;
BEGIN:VEVENT&#13;
CREATED;VALUE=DATE-TIME:20130820T200233Z&#13;
UID:87e47fc65a&#13;
LAST-MODIFIED;VALUE=DATE-TIME:20130820T200233Z&#13;
DTSTAMP;VALUE=DATE-TIME:20130820T200233Z&#13;
SUMMARY:SACKHUEPFEN&#13;
DTSTART;VALUE=DATE:20130820&#13;
DTEND;VALUE=DATE:20130826&#13;
CLASS:PUBLIC&#13;
END:VEVENT&#13;
END:VCALENDAR&#13;
</cal:calendar-data></d:prop><d:status>HTTP/1.1 200 
OK</d:status></d:propstat></d:response><d:response>
<d:href>/remote.php/caldav/calendars/9e681f76-d67d-102d-9eb3-333258c8c572/defaultcalendar/owncloud-31493c29c5a5e517d0b63b126fd2b222.ics</d:href><d:propstat><d:prop><cal:calendar-data>BEGIN:VCALENDAR&#13;
VERSION:2.0&#13;
PRODID:-//Mozilla.org/NONSGML Mozilla Calendar V1.1//EN&#13;
BEGIN:VEVENT&#13;
CREATED:20130820T192909Z&#13;
LAST-MODIFIED:20130820T203525Z&#13;
DTSTAMP:20130820T203525Z&#13;
UID:07e053cb23&#13;
SUMMARY:HAMBURG&#13;
STATUS:CONFIRMED&#13;
DTSTART:20130820T200000Z&#13;
DTEND:20130820T220000Z&#13;
CLASS:PUBLIC&#13;
TRANSP:OPAQUE&#13;
SEQUENCE:1&#13;
X-MOZ-GENERATION:1&#13;
END:VEVENT&#13;
END:VCALENDAR&#13;
</cal:calendar-data></d:prop><d:status>HTTP/1.1 200 
OK</d:status></d:propstat></d:response></d:multistatus>

Is there anything wrong with that? How can I debug that? I use Asterisk 
1.8.23.

Regards,
Matthias


[1] http://owncloud.org/

On Tue, 20 Aug 2013, Matthias Rieber wrote:
> Hi,
>
> I try to use res_calendar with ownCloud. While it works with google/ics,
I've
> some difficulties with caldav and ownCloud[1]. According to the logs and 
> tcpdump the calendar entries have been fetched but they are not available
in
> Asterisk. 'calendar show calendars' doesn't show the status
busy,  'calendar
> show calendar owncloud' doesn't show the current events. I also
don't get any
> result with CALENDAR_QUERY/CALENDAR_QUERY_RESULT. I haven't seen any
special
> error message (core set verbose 10) while reloading the config and fetching
> the calendar entries.
>
> On the wire I see the following answer from the ownlcloud server.:
>
> ....
>
> Is there anything wrong with that? How can I debug that? I use Asterisk 
> 1.8.23.
>
> Regards,
> Matthias
>
>
> [1] http://owncloud.org/

This is a TOTAL hack which I'm sure breaks Google/ics compatibility.  But 
here's what we had to do to get asterisk and owncloud to work together. 
We're still using owncloud 4.5.13 although I suspect the hack will work 
with owncloud 5.x.  Also we're using asterisk 11.5.0 however I'm quite 
sure this worked with 1.8.xx releases.

You will need to make three changes to res/res_calendar_caldav.c

I don't have the exact line numbers from the original source as we made a 
few other minor mods, and there are some other changes from 1.8.x to 
11.5.0, but these line numbers should enable you to find the 
correct locations in res/res_calendar_caldav.c.


Around line 160:
Add this line:
    ne_add_request_header(req, "Depth", "1");
After this line:
    ne_add_request_header(req, "Content-type",
ast_strlen_zero(content_type) ? "text/xml" : content_type);

Around line 482:
change this line:
    if (!xmlStrcasecmp(fullname, BAD_CAST "C:calendar-data")) {
To this:
    if (!xmlStrcasecmp(fullname, BAD_CAST "cal:calendar-data")) {

Around line 497:
Change this line:
    if (xmlStrcasecmp(name, BAD_CAST "C:calendar-data")) {
To this:
    if (xmlStrcasecmp(name, BAD_CAST "cal:calendar-data")) {