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- fixed calendar_ical::importVCal() to (again) return 0 on etag mis-match, as documented and return 412 Precondition Failed in that case

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- Disabling Schedule-Tag handling completly, as current implementation seems to create too much trouble with iCal under OS X or iOS, which send If-Schedule-Tag-Match condition event for major updates, not just changing own status or alarms
This commit is contained in:
Ralf Becker 2011-11-08 21:09:06 +00:00
parent ade24e4943
commit f37f8578cf
2 changed files with 71 additions and 22 deletions
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65
calendar/inc/class.calendar_groupdav.inc.php
View File

@ -56,6 +56,20 @@ class calendar_groupdav extends groupdav_handler
*/
var $client_shared_uid_exceptions = true;
/**
* Enable or disable Schedule-Tag handling:
* - return Schedule-Tag header in PUT response
* - update only status and alarms of calendar owner, if If-Schedule-Tag-Match header in PUT
*
* Disabling Schedule-Tag for iCal, as current implementation seems to create too much trouble :-(
* - iCal on OS X always uses If-Schedule-Tag-Match, even if other stuff in event is changed (eg. title)
* - iCal on iOS allways uses both If-Schedule-Tag-Match and If-Match (ETag)
* - Lighting 1.0 is NOT using it
*
* @var boolean
*/
var $use_schedule_tag = false;
/**
* Are we using id, uid or caldav_name for the path/url
*
@ -243,9 +257,12 @@ class calendar_groupdav extends groupdav_handler
$props = array(
'getcontenttype' => $this->agent != 'kde' ? 'text/calendar; charset=utf-8; component=VEVENT' : 'text/calendar',
'getetag' => '"'.$etag.'"',
'schedule-tag' => HTTP_WebDAV_Server::mkprop(groupdav::CALDAV, 'schedule-tag', '"'.$schedule_tag.'"'),
'getlastmodified' => max($event['modified'], $event['max_user_modified']),
);
if ($this->use_schedule_tag)
{
$props['schedule-tag'] = HTTP_WebDAV_Server::mkprop(groupdav::CALDAV, 'schedule-tag', '"'.$schedule_tag.'"');
}
//error_log(__FILE__ . __METHOD__ . "Calendar Data : $calendar_data");
if ($calendar_data)
{
@ -408,8 +425,10 @@ class calendar_groupdav extends groupdav_handler
$options['mimetype'] = 'text/calendar; charset=utf-8';
header('Content-Encoding: identity');
header('ETag: "'.$this->get_etag($event, $schedule_tag).'"');
if ($this->use_schedule_tag)
{
header('Schedule-Tag: "'.$schedule_tag.'"');
}
return true;
}
@ -580,7 +599,7 @@ class calendar_groupdav extends groupdav_handler
$eventId = $oldEvent['id'];
//client specified a CalDAV Scheduling schedule-tag precondition
if (isset($_SERVER['HTTP_IF_SCHEDULE_TAG_MATCH']))
if ($this->use_schedule_tag && isset($_SERVER['HTTP_IF_SCHEDULE_TAG_MATCH']))
{
$schedule_tag_match = $_SERVER['HTTP_IF_SCHEDULE_TAG_MATCH'];
if ($schedule_tag_match[0] == '"') $schedule_tag_match = substr($schedule_tag_match, 1, -1);
@ -588,28 +607,48 @@ class calendar_groupdav extends groupdav_handler
if ($schedule_tag_match !== $schedule_tag)
{
if ($this->debug) error_log(__METHOD__."(,,$user) schedule_tag missmatch: given '$schedule_tag_match' != '$schedule_tag'");
return '412 Precondition Failed';
}
// update only participant status and alarms of current user
if (($events = $handler->icaltoegw($vCalendar)))
// fix for iCal on OS X, which uses only a schedule-tag (no etag), if event has no participants (only calendar owner)
// --> do regular calendar update as with matching etag (otherwise no updates possible)
if (!(count($oldEvent['participants']) == 1 && isset($oldEvent['participants'][$user])) &&
($events = $handler->icaltoegw($vCalendar)))
{
// todo check behavior for recuring events
foreach($events as $event)
{
if ($this->debug) error_log(__METHOD__."(, $id, $user, '$prefix') eventId=$eventId, user=$user, event=".array2string($event));
if ($event['participants'][$user] != $oldEvent['participants'][$user] &&
!$this->bo->set_status($eventId, $user, $event['participants'][$user], $event['recurrence']))
if ($this->debug) error_log(__METHOD__."(, $id, $user, '$prefix') eventId=$eventId, user=$user, old-status='{$oldEvent['participants'][$user]}', new-status='{$event['participants'][$user]}', event=".array2string($event));
if (isset($event['participants']) && $event['participants'][$user] !== $oldEvent['participants'][$user])
{
if (!$this->bo->set_status($eventId, $user, $event['participants'][$user], $event['recurrence']))
{
if ($this->debug) error_log(__METHOD__."(,,$user) failed to set_status($eventId, $user, '{$event['participants'][$user]}')");
return '403 Forbidden';
}
else
{
if ($this->debug) error_log(__METHOD__."() set_status($eventId, $user, ".array2string($event['participants'][$user])." , $event[recurrence])");
// import alarms
}
}
// import alarms, if given and changed
if ((array)$event['alarm'] !== (array)$oldEvent['alarm'])
{
$this->sync_alarms($eventId, (array)$event['alarm'], (array)$oldEvent['alarm'], $user, $event['start']);
}
elseif (!isset($event['participants']) || $event['participants'][$user] === $oldEvent['participants'][$user])
{
error_log(__METHOD__."(,,$user) schedule-tag given, but NO change for current user event=".array2string($event).', old-event='.array2string($oldEvent));
return '412 Precondition Failed';
}
}
// we should not return an etag here, as we never store the PUT ical byte-by-byte
//header('ETag: "'.$etag.'"');
header('Schedule-Tag: "'.$schedule_tag.'"');
return '204 No Content';
}
if ($this->debug && !isset($events)) error_log(__METHOD__."(,,$user) only schedule-tag given for event without participants (only calendar owner) --> handle as regular PUT");
}
if ($return_no_access)
{
@ -641,24 +680,30 @@ class calendar_groupdav extends groupdav_handler
if (!($cal_id = $handler->importVCal($vCalendar, $eventId,
self::etag2value($this->http_if_match), false, 0, $this->groupdav->current_user_principal, $user, $charset, $id)))
{
if ($this->debug) error_log(__METHOD__."(,$id) eventId=$eventId: importVCal('$options[content]') returned false");
if ($this->debug) error_log(__METHOD__."(,$id) eventId=$eventId: importVCal('$options[content]') returned ".array2string($cal_id));
if ($eventId && $cal_id === false)
{
// ignore import failures
$cal_id = $eventId;
$retval = true;
}
elseif ($cal_id === 0) // etag failure
{
return '412 Precondition Failed';
}
else
{
return '403 Forbidden';
}
}
if ($this->use_schedule_tag)
{
$etag = $this->get_etag($cal_id, $schedule_tag);
// we should not return an etag here, as we never store the PUT ical byte-by-byte
//header('ETag: "'.$etag.'"');
header('Schedule-Tag: "'.$schedule_tag.'"');
}
// send GroupDAV Location header only if we dont use caldav_name as path-attribute
if ($retval !== true && self::$path_attr != 'caldav_name')
{

8
calendar/inc/class.calendar_ical.inc.php
View File

@ -484,6 +484,9 @@ class calendar_ical extends calendar_boupdate
case 'r':
$participantURL = 'urn:uuid:'.common::generate_uid('resources', substr($uid, 1));
$cutype = groupdav_principals::resource_is_location(substr($uid, 1)) ? 'ROOM' : 'RESOURCE';
// unset resource email (email of responsible user) as iCal at least has problems,
// if resonpsible is also pariticipant or organizer
unset($info['email']);
break;
case 'u': // account
case 'c': // contact
@ -1325,7 +1328,7 @@ class calendar_ical extends calendar_boupdate
// as we no longer export event owner/ORGANIZER as only participant, we have to re-add owner as participant
// to not loose him, as EGroupware knows events without owner/ORGANIZER as participant
if (isset($event_info['stored_event']['participants'][$event['owner']]) && !isset($event['participant'][$event['owner']]))
if (isset($event_info['stored_event']['participants'][$event['owner']]) && !isset($event['participants'][$event['owner']]))
{
$event['participant'][$event['owner']] = $event_info['stored_event']['participants'][$event['owner']];
}
@ -1726,7 +1729,8 @@ class calendar_ical extends calendar_boupdate
}
}
date_default_timezone_set($GLOBALS['egw_info']['server']['server_timezone']);
return $return_id;
return $updated_id === 0 ? 0 : $return_id;
}
/**