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caldav-PROPPATCH.php
<?php
dbg_error_log("PROPPATCH", "method handler");
require_once('vCalendar.php');
require_once('DAVResource.php');
$dav_resource = new DAVResource($request->path);
if ( !$dav_resource->HavePrivilegeTo('DAV::write-properties') ) {
$parent = $dav_resource->GetParentContainer();
if ( !$dav_resource->IsBinding() || !$parent->HavePrivilegeTo('DAV::write') ) {
$request->PreconditionFailed(403, 'DAV::write-properties', 'You do not have permission to write properties to that resource' );
}
}
$xmltree = BuildXMLTree( $request->xml_tags );
// echo $xmltree->Render();
if ( $xmltree->GetNSTag() != "DAV::propertyupdate" ) {
$request->PreconditionFailed( 403, 'DAV::propertyupdate', 'XML request did not contain a &lt;propertyupdate&gt; tag' );
}
$setprops = $xmltree->GetPath("/DAV::propertyupdate/DAV::set/DAV::prop/*");
$rmprops = $xmltree->GetPath("/DAV::propertyupdate/DAV::remove/DAV::prop/*");
$failure = array();
$success = array();
$reply = new XMLDocument( array( 'DAV:' => '') );
function add_failure( $type, $tag, $status, $description=null, $error_tag = null) {
global $failure, $reply;
$prop = new XMLElement('prop');
$reply->NSElement($prop, $tag);
$propstat = array($prop,new XMLElement( 'status', $status ));
if ( isset($description))
$propstat[] = new XMLElement( 'responsedescription', $description );
if ( isset($error_tag) )
$propstat[] = new XMLElement( 'error', new XMLElement( $error_tag ) );
$failure[$type.'-'.$tag] = new XMLElement('propstat', $propstat );
}
$qry = new AwlQuery();
$qry->Begin();
$setcalendar = count($xmltree->GetPath('/DAV::propertyupdate/DAV::set/DAV::prop/DAV::resourcetype/urn:ietf:params:xml:ns:caldav:calendar'));
foreach( $setprops AS $k => $setting ) {
$tag = $setting->GetNSTag();
$content = $setting->RenderContent(0,null,true);
switch( $tag ) {
case 'DAV::displayname':
if ( $dav_resource->IsCollection() || $dav_resource->IsPrincipal() ) {
if ( $dav_resource->IsBinding() ) {
$qry->QDo('UPDATE dav_binding SET dav_displayname = :displayname WHERE dav_name = :dav_name',
array( ':displayname' => $content, ':dav_name' => $dav_resource->dav_name()) );
}
else if ( $dav_resource->IsPrincipal() ) {
$qry->QDo('UPDATE dav_principal SET fullname = :displayname, displayname = :displayname, modified = current_timestamp WHERE user_no = :user_no',
array( ':displayname' => $content, ':user_no' => $request->user_no) );
}
else {
$qry->QDo('UPDATE collection SET dav_displayname = :displayname, modified = current_timestamp WHERE dav_name = :dav_name',
array( ':displayname' => $content, ':dav_name' => $dav_resource->dav_name()) );
}
$success[$tag] = 1;
}
else {
add_failure('set', $tag, 'HTTP/1.1 403 Forbidden',
translate("The displayname may only be set on collections, principals or bindings."), 'cannot-modify-protected-property');
}
break;
case 'DAV::resourcetype':
$resourcetypes = $setting->GetPath('DAV::resourcetype/*');
$setcollection = false;
$setcalendar = false;
$setaddressbook = false;
$setother = false;
foreach( $resourcetypes AS $xnode ) {
switch( $xnode->GetNSTag() ) {
case 'urn:ietf:params:xml:ns:caldav:calendar': $setcalendar = true; break;
case 'urn:ietf:params:xml:ns:carddav:addressbook': $setaddressbook = true; break;
case 'DAV::collection': $setcollection = true; break;
default:
$setother = true;
}
}
if ( $dav_resource->IsCollection() && $setcollection && ! $dav_resource->IsPrincipal() && ! $dav_resource->IsBinding()
&& !($setcalendar && $setaddressbook) && !$setother ) {
$resourcetypes = '<collection xmlns="DAV:"/>';
if ( $setcalendar ) $resourcetypes .= '<calendar xmlns="urn:ietf:params:xml:ns:caldav"/>';
else if ( $setaddressbook ) $resourcetypes .= '<addressbook xmlns="urn:ietf:params:xml:ns:carddav"/>';
$qry->QDo('UPDATE collection SET is_calendar = :is_calendar::boolean, is_addressbook = :is_addressbook::boolean,
resourcetypes = :resourcetypes WHERE dav_name = :dav_name',
array( ':dav_name' => $dav_resource->dav_name(), ':resourcetypes' => $resourcetypes,
':is_calendar' => $setcalendar, ':is_addressbook' => $setaddressbook ) );
$success[$tag] = 1;
}
else if ( $setcalendar && $setaddressbook ) {
add_failure('set', $tag, 'HTTP/1.1 409 Conflict',
translate("A collection may not be both a calendar and an addressbook."));
}
else if ( $setother ) {
add_failure('set', $tag, 'HTTP/1.1 403 Forbidden',
translate("Unsupported resourcetype modification."), 'cannot-modify-protected-property');
}
else {
add_failure('set', $tag, 'HTTP/1.1 403 Forbidden',
translate("Resources may not be changed to / from collections."), 'cannot-modify-protected-property');
}
break;
case 'DAV::group-member-set':
if ( $dav_resource->IsProxyCollection() ) {
$privileges_read = privilege_to_bits( array('read', 'read-free-busy', 'schedule-deliver') );
$privileges_write = privilege_to_bits( array('write', 'schedule-send') );
$type = 'read';
if ( $dav_resource->IsProxyCollection('write') ) {
$type = 'write';
}
$by_principal = $dav_resource->getProperty('principal_id');
$sqlparams = array( ':by_principal' => $by_principal );
$existing_grants = array();
$qry->QDo('SELECT to_principal, privileges FROM grants WHERE by_principal = :by_principal', $sqlparams);
while ( $row = $qry->Fetch() ) {
$existing_grants[$row->to_principal] = bindec($row->privileges);
}
$group_members = $setting->GetElements('DAV::href');
foreach( $group_members AS $member ) {
$to_principal = new Principal('path', DeconstructURL( $member->GetContent() ));
if ( !$to_principal->Exists() ) {
add_failure('set', $tag, 'HTTP/1.1 403 Forbidden',
translate('Principal not found') . ': ' . $member->GetContent(), 'recognized-principal');
break;
}
$sqlparams[':to_principal'] = $to_principal->principal_id();
if ( array_key_exists($to_principal->principal_id(), $existing_grants) ) {
$sql = 'UPDATE grants SET privileges=:privileges::INT::BIT(24) WHERE to_principal=:to_principal AND by_principal=:by_principal';
$existing_privileges = $existing_grants[$to_principal->principal_id()];
unset( $existing_grants[$to_principal->principal_id()] );
} else {
$sql = 'INSERT INTO grants (by_principal, to_principal, privileges) VALUES(:by_principal, :to_principal, :privileges::INT::BIT(24))';
$existing_privileges = 0;
}
$privileges = $existing_privileges | $privileges_read; // always add read privileges here
if ( $type == 'write' ) {
$privileges |= $privileges_write; // add write privileges as well
} else {
$privileges &= $privileges_write ^ DAVICAL_MAXPRIV; // substract write privileges
}
if ( $privileges == $existing_privileges ) continue; // unchanged
$sqlparams[':privileges'] = $privileges;
$qry->QDo($sql, $sqlparams);
dbg_error_log("PROPPATCH", "group-member-set: %s (%s) is granted %s access to %s", $to_principal->username(), $to_principal->principal_id(), $type, $dav_resource->getProperty('username'));
Principal::cacheDelete('dav_name',$to_principal->dav_name());
Principal::cacheFlush('principal_id IN (SELECT member_id FROM group_member WHERE group_id = ?)', array($to_principal->principal_id()));
}
// if there are any remaining grants of our $type, we need to delete them
// ("set" means "replace any existing property", WEBDAV RFC2518 12.13.2)
foreach ( $existing_grants AS $id => $existing_privs ) {
$have_write = $existing_privs & $privileges_write;
if ( $type == 'read' && $have_write ) continue;
if ( $type == 'write' && ! $have_write ) continue;
$negative_readwrite = ( $privileges_read | $privileges_write ) ^ DAVICAL_MAXPRIV;
$remaining_privs = $existing_privs & $negative_readwrite;
if ( $remaining_privs > 0 ) {
$sql = 'UPDATE grants SET privileges=:privileges::INT::BIT(24)';
$sqlparams[':privileges'] = $remaining_privs;
} else {
$sql = 'DELETE FROM grants';
}
$sqlparams[':to_principal'] = $id;
$qry->QDo($sql.' WHERE to_principal=:to_principal AND by_principal=:by_principal', $sqlparams);
dbg_error_log("PROPPATCH", "group-member-set: %s is no longer granted %s access to %s", $id, $type, $dav_resource->getProperty('username'));
Principal::cacheFlush('principal_id = :to_principal', $sqlparams);
}
}
else {
/* @todo PROPPATCH set group-member-set for regular group principal */
dbg_error_log("ERROR", "PROPPATCH: set group-member-set for non-proxy collection: don't know what to do!");
add_failure('set', $tag, 'HTTP/1.1 403 Forbidden',
'group-member-set ' . translate('unimplemented'), 'cannot-modify-protected-property');
break;
}
$success[$tag] = 1;
break;
case 'urn:ietf:params:xml:ns:caldav:schedule-calendar-transp':
if ( $dav_resource->IsCollection() && ( $dav_resource->IsCalendar() || $setcalendar ) && !$dav_resource->IsBinding() ) {
$transparency = $setting->GetPath('urn:ietf:params:xml:ns:caldav:schedule-calendar-transp/*');
$transparency = preg_replace( '{^.*:}', '', $transparency[0]->GetNSTag());
$qry->QDo('UPDATE collection SET schedule_transp = :transparency WHERE dav_name = :dav_name',
array( ':dav_name' => $dav_resource->dav_name(), ':transparency' => $transparency ) );
$success[$tag] = 1;
}
else {
add_failure('set', $tag, 'HTTP/1.1 409 Conflict',
translate("The CalDAV:schedule-calendar-transp property may only be set on calendars."));
}
break;
case 'urn:ietf:params:xml:ns:caldav:calendar-free-busy-set':
add_failure('set', $tag, 'HTTP/1.1 409 Conflict',
translate("The calendar-free-busy-set is superseded by the schedule-calendar-transp property of a calendar collection.") );
break;
case 'urn:ietf:params:xml:ns:caldav:calendar-timezone':
if ( $dav_resource->IsCollection() && $dav_resource->IsCalendar() && ! $dav_resource->IsBinding() ) {
$tzcomponent = $setting->GetPath('urn:ietf:params:xml:ns:caldav:calendar-timezone');
$tzstring = $tzcomponent[0]->GetContent();
$calendar = new vCalendar( $tzstring );
$timezones = $calendar->GetComponents('VTIMEZONE');
if ( count($timezones) == 0 ) break;
$tz = $timezones[0]; // Backward compatibility
$tzid = $tz->GetPValue('TZID');
$params = array( ':tzid' => $tzid );
$qry = new AwlQuery('SELECT 1 FROM timezones WHERE tzid = :tzid', $params );
if ( $qry->Exec('PUT',__LINE__,__FILE__) && $qry->rows() == 0 ) {
$params[':olson_name'] = $calendar->GetOlsonName($tz);
$params[':vtimezone'] = (isset($tz) ? $tz->Render() : null );
$qry->QDo('INSERT INTO timezones (tzid, olson_name, active, vtimezone) VALUES(:tzid,:olson_name,false,:vtimezone)', $params );
}
$qry->QDo('UPDATE collection SET timezone = :tzid WHERE dav_name = :dav_name',
array( ':tzid' => $tzid, ':dav_name' => $dav_resource->dav_name()) );
require_once("instance_range.php");
update_instance_ranges($dav_resource->dav_name());
}
else {
add_failure('set', $tag, 'HTTP/1.1 409 Conflict', translate("calendar-timezone property is only valid for a calendar."));
}
break;
case 'http://calendarserver.org/ns/:getctag':
case 'DAV::owner':
case 'DAV::principal-collection-set':
case 'urn:ietf:params:xml:ns:caldav:calendar-user-address-set':
case 'urn:ietf:params:xml:ns:caldav:schedule-inbox-URL':
case 'urn:ietf:params:xml:ns:caldav:schedule-outbox-URL':
case 'DAV::getetag':
case 'DAV::getcontentlength':
case 'DAV::getcontenttype':
case 'DAV::getlastmodified':
case 'DAV::creationdate':
case 'DAV::lockdiscovery':
case 'DAV::supportedlock':
case 'DAV::group-membership':
case 'http://calendarserver.org/ns/:calendar-proxy-read-for':
case 'http://calendarserver.org/ns/:calendar-proxy-write-for':
add_failure('set', $tag, 'HTTP/1.1 403 Forbidden', translate("Property is read-only"), 'cannot-modify-protected-property');
break;
default:
$qry->QDo('SELECT set_dav_property( :dav_name, :user_no::integer, :tag::text, :value::text)',
array( ':dav_name' => $dav_resource->dav_name(), ':user_no' => $request->user_no, ':tag' => $tag, ':value' => $content) );
$result = $qry->Fetch();
if ( $result->set_dav_property ) {
$success[$tag] = 1;
} else {
dbg_error_log("ERROR", "failed to set_dav_property %s on %s to '%s'", $tag, $dav_resource->dav_name(), $content);
add_failure('set', $tag, 'HTTP/1.1 403 Forbidden');
}
break;
}
}
foreach( $rmprops AS $k => $setting ) {
$tag = $setting->GetNSTag();
$content = $setting->RenderContent();
switch( $tag ) {
case 'DAV::resourcetype':
add_failure('rm', $tag, 'HTTP/1.1 403 Forbidden',
translate("DAV::resourcetype may only be set to a new value, it may not be removed."), 'cannot-modify-protected-property');
break;
case 'DAV::group-member-set':
if ( $dav_resource->IsProxyCollection() ) {
$type = 'read';
$privileges = privilege_to_bits( array('read', 'read-free-busy', 'schedule-deliver') );
if ( $dav_resource->IsProxyCollection('write') ) {
$type = 'write';
$privileges |= privilege_to_bits( array('write', 'schedule-send') );
}
$by_principal = $dav_resource->getProperty('principal_id');
$sqlparams = array( ':by_principal' => $by_principal );
// look up existing grants of our type
$existing_grants = array();
$qry->QDo('SELECT privileges, to_principal FROM grants WHERE by_principal = :by_principal', $sqlparams);
while( $row = $qry->Fetch() ) {
$existing_privileges = bindec($row->privileges);
if ( ($existing_privileges & $privileges) == $privileges ) {
$existing_grants[$row->to_principal] = $existing_privileges;
}
}
// examine the members to be removed
$group_members = $setting->GetElements('DAV::href');
foreach( $group_members AS $member ) {
$to_principal = new Principal('path', DeconstructURL( $member->GetContent() ));
// "Specifying the removal of a property that does not exist is not an error."
if ( !$to_principal->Exists() ) continue;
if ( !array_key_exists($to_principal->principal_id(), $existing_grants) ) continue;
$remaining_privileges = $existing_grants[$to_principal->principal_id()] & ($privileges ^ DAVICAL_MAXPRIV);
if ($remaining_privileges > 0) {
$sql = 'UPDATE grants SET privileges=:privileges::INT::BIT(24) ';
$sqlparams[':privileges'] = $remaining_privileges;
} else {
$sql = 'DELETE FROM grants ';
}
$sqlparams[':to_principal'] = $to_principal->principal_id();
$qry->QDo($sql.'WHERE by_principal = :by_principal AND to_principal = :to_principal', $sqlparams);
dbg_error_log("PROPPATCH", "group-member-set: %s is no longer granted %s access to %s", $to_principal->username(), $type, $by_principal);
Principal::cacheFlush('principal_id = :to_principal', $sqlparams);
}
}
else {
/* @todo PROPPATCH remove group-member-set for regular group principal */
dbg_error_log("ERROR", "PROPPATCH: remove group-member-set for non-proxy collection: don't know what to do!");
add_failure('rm', $tag, 'HTTP/1.1 403 Forbidden',
'group-member-set ' . translate('unimplemented'), 'cannot-modify-protected-property');
break;
}
$success[$tag] = 1;
break;
case 'urn:ietf:params:xml:ns:caldav:calendar-timezone':
if ( $dav_resource->IsCollection() && $dav_resource->IsCalendar() && ! $dav_resource->IsBinding() ) {
$qry->QDo('UPDATE collection SET timezone = NULL WHERE dav_name = :dav_name', array( ':dav_name' => $dav_resource->dav_name()) );
require_once("instance_range.php");
update_instance_ranges($dav_resource->dav_name());
}
else {
add_failure('rm', $tag, 'HTTP/1.1 403 Forbidden',
translate("calendar-timezone property is only valid for a calendar."), 'cannot-modify-protected-property');
}
break;
case 'http://calendarserver.org/ns/:getctag':
case 'DAV::owner':
case 'DAV::principal-collection-set':
case 'urn:ietf:params:xml:ns:caldav:CALENDAR-USER-ADDRESS-SET':
case 'urn:ietf:params:xml:ns:caldav:schedule-inbox-URL':
case 'urn:ietf:params:xml:ns:caldav:schedule-outbox-URL':
case 'DAV::getetag':
case 'DAV::getcontentlength':
case 'DAV::getcontenttype':
case 'DAV::getlastmodified':
case 'DAV::creationdate':
case 'DAV::displayname':
case 'DAV::lockdiscovery':
case 'DAV::supportedlock':
case 'DAV::group-membership':
case 'http://calendarserver.org/ns/:calendar-proxy-read-for':
case 'http://calendarserver.org/ns/:calendar-proxy-write-for':
add_failure('rm', $tag, 'HTTP/1.1 409 Conflict', translate("Property is read-only"));
dbg_error_log( 'PROPPATCH', ' RMProperty %s is read only and cannot be removed', $tag);
break;
default:
$qry->QDo('DELETE FROM property WHERE dav_name=:dav_name AND property_name=:property_name',
array( ':dav_name' => $dav_resource->dav_name(), ':property_name' => $tag) );
$success[$tag] = 1;
break;
}
}
if ( count($failure) > 0 ) {
$qry->Rollback();
$url = ConstructURL($request->path);
$multistatus = new XMLElement('multistatus');
array_unshift($failure,new XMLElement('responsedescription', translate("Some properties were not able to be changed.") ));
array_unshift($failure,new XMLElement('href', $url));
$response = $reply->DAVElement($multistatus,'response', $failure);
if ( !empty($success) ) {
$prop = new XMLElement('prop');
foreach( $success AS $tag => $v ) {
$reply->NSElement($prop, $tag);
}
$reply->DAVElement($response, 'propstat', array( $prop, new XMLElement( 'status', 'HTTP/1.1 424 Failed Dependency' )) );
}
$request->DoResponse( 207, $reply->Render($multistatus), 'text/xml; charset="utf-8"' );
}
if ( $qry->Commit() ) {
$cache = getCacheInstance();
$cache_ns = null;
if ( $dav_resource->IsPrincipal() ) {
$cache_ns = 'principal-'.$dav_resource->dav_name();
}
else if ( $dav_resource->IsCollection() ) {
// Uncache anything to do with the collection
$cache_ns = 'collection-'.$dav_resource->dav_name();
}
if ( isset($cache_ns) ) $cache->delete( $cache_ns, null );
if ( $request->PreferMinimal() ) {
$request->DoResponse(200); // Does not return.
}
$url = ConstructURL($request->path);
$multistatus = new XMLElement('multistatus');
$response = $multistatus->NewElement('response');
$reply->DAVElement($response,'href', $url);
$reply->DAVElement($response,'responsedescription', translate("All requested changes were made.") );
$prop = new XMLElement('prop');
foreach( $success AS $tag => $v ) {
$reply->NSElement($prop, $tag);
}
$reply->DAVElement($response, 'propstat', array( $prop, new XMLElement( 'status', 'HTTP/1.1 200 OK' )) );
$url = ConstructURL($request->path);
array_unshift( $failure, new XMLElement('href', $url ) );
$request->DoResponse( 207, $reply->Render($multistatus), 'text/xml; charset="utf-8"' );
}
$request->DoResponse( 500 );
exit(0); // unneccessary
DAVResource
Definition DAVResource.php:25
Principal
Definition Principal.php:19