DAViCal
caldav-PROPFIND.php
1 <?php
11 dbg_error_log('PROPFIND', 'method handler');
12 
13 $request->NeedPrivilege( array('DAV::read', 'urn:ietf:params:xml:ns:caldav:read-free-busy','DAV::read-current-user-privilege-set') );
14 
15 require_once('iCalendar.php');
16 require_once('XMLDocument.php');
17 require_once('DAVResource.php');
18 
19 $reply = new XMLDocument( array( 'DAV:' => '' ) );
20 
21 if ( !isset($request->xml_tags) ) {
22  // Empty body indicates DAV::allprop request according to RFC4918
23  $property_list = array('DAV::allprop');
24 }
25 else {
26  $position = 0;
27  $xmltree = BuildXMLTree( $request->xml_tags, $position);
28  if ( !is_object($xmltree) ) {
29  $request->DoResponse( 403, translate("Request body is not valid XML data!") );
30  }
31  $allprop = $xmltree->GetPath('/DAV::propfind/*');
32  $property_list = array();
33  foreach( $allprop AS $k1 => $propwrap ) {
34  switch ( $propwrap->GetNSTag() ) {
35  case 'DAV::allprop':
36  $property_list[] = 'DAV::allprop';
37  break;
38  case 'DAV::propname':
39  $property_list[] = 'DAV::propname';
40  break;
41  default: // prop, include
42  $subprop = $propwrap->GetElements();
43  foreach( $subprop AS $k => $v ) {
44  if ( is_object($v) && method_exists($v,'GetTag') ) $property_list[] = $v->GetNSTag();
45  }
46  }
47  }
48 }
49 
54 function add_proxy_response( $which, $parent_path ) {
55  global $request, $reply, $c, $session, $property_list;
56 
57  if ($parent_path != $request->principal->dav_name()) {
58  dbg_error_log( 'PROPFIND', 'Not returning proxy response since "%s" != "%s"', $parent_path, $request->principal->dav_name() );
59  return null; // Nothing to proxy for
60  }
61 
62  $collection = (object) '';
63  if ( $which == 'read' ) {
64  $proxy_group = $request->principal->ReadProxyGroup();
65  } else if ( $which == 'write' ) {
66  $proxy_group = $request->principal->WriteProxyGroup();
67  }
68 
69  dbg_error_log( 'PROPFIND', 'Returning proxy response to "%s" for "%s"', $which, $parent_path );
70 
71  $collection->parent_container = $parent_path;
72  $collection->dav_name = $parent_path.'calendar-proxy-'.$which.'/';
73  $collection->is_calendar = 'f';
74  $collection->is_addressbook = 'f';
75  $collection->is_principal = 't';
76  $collection->is_proxy = 't';
77  $collection->proxy_type = $which;
78  $collection->type = 'proxy';
79  $collection->dav_displayname = $collection->dav_name;
80  $collection->collection_id = 0;
81  $collection->user_no = $session->user_no;
82  $collection->username = $session->username;
83  $collection->email = $session->email;
84  $collection->created = date('Ymd\THis');
85  $collection->dav_etag = md5($c->system_name . $collection->dav_name . implode($proxy_group) );
86  $collection->proxy_for = $proxy_group;
87  $collection->resourcetypes = sprintf('<DAV::principal/><DAV::collection/><http://calendarserver.org/ns/:calendar-proxy-%s/>', $which);
88  $collection->in_freebusy_set = 'f';
89  $collection->schedule_transp = 'transp';
90  $collection->timezone = null;
91  $collection->description = '';
92 
93  $resource = new DAVResource($collection);
94  return $resource->RenderAsXML($property_list, $reply);
95 
96 }
97 
98 
104 function get_collection_contents( $depth, $collection, $parent_path = null ) {
105  global $c, $session, $request, $reply, $property_list;
106 
107  // for http header comparison
108  function compare_val_with_re($val, $re){ return preg_match($re, $val)===1 ? 0 : 1; }
109 
110  $bound_from = $collection->bound_from();
111  $bound_to = $collection->dav_name();
112  if ( !isset($parent_path) ) $parent_path = $collection->dav_name();
113  dbg_error_log('PROPFIND','Getting collection contents: Depth %d, Path: %s, Bound from: %s, Bound to: %s',
114  $depth, $collection->dav_name(), $bound_from, $bound_to );
115 
116  $date_format = AwlDBDialect::HttpDateFormat;
117  $responses = array();
118  if ( ! $collection->IsCalendar() && ! $collection->IsAddressbook() ) {
122  $params = array( ':session_principal' => $session->principal_id, ':scan_depth' => $c->permission_scan_depth );
123  if ( $bound_from == '/' ) {
124  $sql = "SELECT usr.*, '/' || username || '/' AS dav_name, md5(username || updated::text) AS dav_etag, ";
125  $sql .= "to_char(joined at time zone 'GMT',$date_format) AS created, ";
126  $sql .= "to_char(updated at time zone 'GMT',$date_format) AS modified, ";
127  $sql .= 'FALSE AS is_calendar, TRUE AS is_principal, FALSE AS is_addressbook, \'principal\' AS type, ';
128  $sql .= 'principal_id AS collection_id, ';
129  $sql .= 'principal.* ';
130  $sql .= 'FROM usr JOIN principal USING (user_no) ';
131  $sql .= "WHERE (pprivs(:session_principal::int8,principal.principal_id,:scan_depth::int) & 1::BIT(24))::INT4::BOOLEAN ";
132  $sql .= 'ORDER BY usr.user_no';
133  }
134  else {
135  if ( !( isset($c->hide_bound) && (
136  ((is_bool($c->hide_bound) || is_numeric($c->hide_bound)) && $c->hide_bound != false) ||
137  (is_string($c->hide_bound) && preg_match($c->hide_bound, $_SERVER['HTTP_USER_AGENT'])) ||
138  (is_array($c->hide_bound) && count(array_uintersect_assoc(
139  array_change_key_case(apache_request_headers(), CASE_LOWER),
140  array_change_key_case($c->hide_bound, CASE_LOWER),
141  'compare_val_with_re'))) ) ) ) {
142  $qry = new AwlQuery('SELECT * FROM dav_binding WHERE dav_binding.parent_container = :this_dav_name ORDER BY bind_id',
143  array(':this_dav_name' => $bound_from));
144  if( $qry->Exec('PROPFIND',__LINE__,__FILE__) && $qry->rows() > 0 ) {
145  while( $binding = $qry->Fetch() ) {
146  $resource = new DAVResource($binding->dav_name);
147  if ( $resource->IsExternal() ) {
148  require_once("external-fetch.php");
149  update_external ( $resource );
150  }
151  if ( $resource->HavePrivilegeTo('DAV::read', false) ) {
152  $resource->set_bind_location( str_replace($bound_from,$bound_to,$binding->dav_name));
153  $responses[] = $resource->RenderAsXML($property_list, $reply);
154  if ( $depth > 0 ) {
155  $responses = array_merge($responses, get_collection_contents( $depth - 1, $resource, $binding->dav_name ) );
156  }
157  }
158  }
159  }
160  }
161 
162  $sql = 'SELECT principal.*, collection.*, \'collection\' AS type ';
163  $sql .= 'FROM collection LEFT JOIN principal USING (user_no) ';
164  $sql .= 'WHERE parent_container = :this_dav_name ';
165  $sql .= ' ORDER BY collection_id';
166  $params[':this_dav_name'] = $bound_from;
167  unset($params[':session_principal']);
168  unset($params[':scan_depth']);
169  }
170  $qry = new AwlQuery($sql, $params);
171 
172  if( $qry->Exec('PROPFIND',__LINE__,__FILE__) && $qry->rows() > 0 ) {
173  while( $subcollection = $qry->Fetch() ) {
174  $resource = new DAVResource($subcollection);
175  if ( ! $resource->HavePrivilegeTo('DAV::read') ) continue;
176  $resource->set_bind_location( str_replace($bound_from,$bound_to,$subcollection->dav_name));
177  $responses[] = $resource->RenderAsXML($property_list, $reply);
178  if ( $depth > 0 ) {
179  $responses = array_merge($responses, get_collection_contents( $depth - 1, $resource,
180  str_replace($resource->parent_path(), $parent_path, $resource->dav_name() ) ) );
181  }
182  }
183  }
184 
185  if ( !( (isset($c->disable_caldav_proxy) && $c->disable_caldav_proxy != false) ||
186  (isset($c->disable_caldav_proxy_propfind_collections) && (
187  ((is_bool($c->disable_caldav_proxy_propfind_collections) || is_numeric($c->disable_caldav_proxy_propfind_collections)) && $c->disable_caldav_proxy_propfind_collections != false) ||
188  (is_string($c->disable_caldav_proxy_propfind_collections) && preg_match($c->disable_caldav_proxy_propfind_collections, $_SERVER['HTTP_USER_AGENT'])) ||
189  (is_array($c->disable_caldav_proxy_propfind_collections) && count(array_uintersect_assoc(
190  array_change_key_case(apache_request_headers(), CASE_LOWER),
191  array_change_key_case($c->disable_caldav_proxy_propfind_collections, CASE_LOWER),
192  'compare_val_with_re')))) ) ) && $collection->IsPrincipal() ) {
193  // Caldav Proxy: 5.1 par. 2: Add child resources calendar-proxy-(read|write)
194  dbg_error_log('PROPFIND','Adding calendar-proxy-read and write. Path: %s', $bound_from );
195  $response = add_proxy_response('read', $bound_from );
196  if ( isset($response) ) $responses[] = $response;
197  $response = add_proxy_response('write', $bound_from );
198  if ( isset($response) ) $responses[] = $response;
199  }
200  }
201 
205  if ( $collection->HavePrivilegeTo('DAV::read', false) ) {
206  dbg_error_log('PROPFIND','Getting collection items: Depth %d, Path: %s', $depth, $bound_from );
207  $privacy_clause = ' ';
208  $todo_clause = ' ';
209  $time_limit_clause = ' ';
210  if ( $collection->IsCalendar() ) {
211  if ( ! $collection->HavePrivilegeTo('all', false) ) {
212  $privacy_clause = " AND (calendar_item.class != 'PRIVATE' OR calendar_item.class IS NULL) ";
213  }
214 
215  if ( isset($c->hide_TODO) && ($c->hide_TODO === true || (is_string($c->hide_TODO) && preg_match($c->hide_TODO, $_SERVER['HTTP_USER_AGENT']))) && ! $collection->HavePrivilegeTo('all') ) {
216  $todo_clause = " AND caldav_data.caldav_type NOT IN ('VTODO') ";
217  }
218 
219  if ( isset($c->hide_older_than) && intval($c->hide_older_than > 0) ) {
220  $time_limit_clause = " AND (CASE WHEN caldav_data.caldav_type<>'VEVENT' OR calendar_item.dtstart IS NULL OR calendar_item.rrule IS NOT NULL THEN true ELSE calendar_item.dtstart > (now() - interval '".intval($c->hide_older_than)." days') END) ";
221  }
222  }
223 
224  $sql = 'SELECT collection.*, principal.*, calendar_item.*, caldav_data.*, ';
225  $sql .= "to_char(coalesce(calendar_item.created, caldav_data.created) at time zone 'GMT',$date_format) AS created, ";
226  $sql .= "to_char(coalesce(calendar_item.last_modified, caldav_data.modified) at time zone 'GMT',$date_format) AS modified, ";
227  $sql .= 'summary AS dav_displayname ';
228  $sql .= 'FROM caldav_data LEFT JOIN calendar_item USING( dav_id, user_no, dav_name, collection_id) ';
229  $sql .= 'LEFT JOIN collection USING(collection_id,user_no) LEFT JOIN principal USING(user_no) ';
230  $sql .= 'WHERE collection.dav_name = :collection_dav_name '.$time_limit_clause.' '.$todo_clause.' '.$privacy_clause;
231  if ( isset($c->strict_result_ordering) && $c->strict_result_ordering ) $sql .= " ORDER BY caldav_data.dav_id";
232  $qry = new AwlQuery( $sql, array( ':collection_dav_name' => $bound_from) );
233  if( $qry->Exec('PROPFIND',__LINE__,__FILE__) && $qry->rows() > 0 ) {
234  while( $item = $qry->Fetch() ) {
235  if ( $bound_from != $bound_to ) {
236  $item->bound_from = $item->dav_name;
237  $item->dav_name = str_replace($bound_from,$bound_to,$item->dav_name);
238  }
239  $resource = new DAVResource($item);
240  $responses[] = $resource->RenderAsXML($property_list, $reply, $parent_path );
241  }
242  }
243  }
244 
245  return $responses;
246 }
247 
248 
249 
253 $responses = array();
254 if ( $request->IsProxyRequest() ) {
255  $response = add_proxy_response($request->proxy_type, $request->principal->dav_name() );
256  if ( isset($response) ) $responses[] = $response;
257 }
258 else {
259  $resource = new DAVResource($request->path);
260  if ( ! $resource->Exists() ) {
261  $request->PreconditionFailed( 404, 'must-exist', translate('That resource is not present on this server.') );
262  }
263  $resource->NeedPrivilege('DAV::read');
264  if ( $resource->IsExternal() ) {
265  require_once("external-fetch.php");
266  update_external ( $resource );
267  }
268  if ( $resource->IsCollection() ) {
269  dbg_error_log('PROPFIND','Getting collection contents: Depth %d, Path: %s', $request->depth, $resource->dav_name() );
270  $responses[] = $resource->RenderAsXML($property_list, $reply);
271  if ( $request->depth > 0 ) {
272  $responses = array_merge($responses, get_collection_contents( $request->depth - 1, $resource ) );
273  }
274  }
275  elseif ( $request->HavePrivilegeTo('DAV::read',false) ) {
276  $responses[] = $resource->RenderAsXML($property_list, $reply);
277  }
278 }
279 
280 $xmldoc = $reply->Render('multistatus', $responses);
281 $etag = md5($xmldoc);
282 header('ETag: "'.$etag.'"');
283 $request->DoResponse( 207, $xmldoc, 'text/xml; charset="utf-8"' );
284