egroupware/phpgwapi/inc/class.groupdav.inc.php

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<?php
/**
* eGroupWare: GroupDAV access
*
* Using the PEAR HTTP/WebDAV/Server class (which need to be installed!)
*
* @link http://www.egroupware.org
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package api
* @subpackage groupdav
* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @copyright (c) 2007/8 by Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @version $Id$
*/
require_once('HTTP/WebDAV/Server.php');
/**
* eGroupWare: GroupDAV access
*
* Using the PEAR HTTP/WebDAV/Server class (which need to be installed!)
*
* @link http://www.groupdav.org GroupDAV spec
*/
class groupdav extends HTTP_WebDAV_Server
{
/**
* GroupDAV namespace
*/
const GROUPDAV = 'http://groupdav.org/';
/**
* CalDAV namespace
*/
const CALDAV = 'urn:ietf:params:xml:ns:caldav';
/**
* CardDAV namespace
*/
const CARDDAV = 'urn:ietf:params:xml:ns:carddav';
/**
* Realm and powered by string
*/
const REALM = 'eGroupWare CalDAV/CardDAV/GroupDAV server';
var $dav_powered_by = self::REALM;
var $root = array(
'calendar' => array(self::GROUPDAV => 'vevent-collection', self::CALDAV => 'calendar'),
'addressbook' => array(self::GROUPDAV => 'vcard-collection', self::CARDDAV => 'addressbook'),
'infolog' => array(self::GROUPDAV => 'vtodo-collection'),
);
/**
* Debug level: 0 = nothing, 1 = function calls, 2 = more info, 3 = complete $_SERVER array
*
* The debug messages are send to the apache error_log
*
* @var integer
*/
var $debug = 1;
/**
* eGW's charset
*
* @var string
*/
var $egw_charset;
/**
* Reference to the translation class
*
* @var translation
*/
var $translation;
/**
* Instance of our application specific handler
*
* @var groupdav_handler
*/
var $handler;
function __construct()
{
if ($this->debug > 2) foreach($_SERVER as $name => $val) error_log("groupdav: \$_SERVER[$name]='$val'");
parent::HTTP_WebDAV_Server();
$this->translation =& $GLOBALS['egw']->translation;
$this->egw_charset = $this->translation->charset();
}
function _instancicate_handler($app)
{
$this->handler = groupdav_handler::app_handler($app);
}
/**
* OPTIONS request, allow to modify the standard responses from the pear-class
*
* @param string $path
* @param array &$dav
* @param array &$allow
*/
function OPTIONS($path, &$dav, &$allow)
{
list(,$app) = explode('/',$path);
switch($app)
{
case 'calendar':
$dav[] = 'calendar-access';
break;
case 'addressbook':
$dav[] = 'addressbook';
break;
}
// not yet implemented: $dav[] = 'access-control';
}
/**
* PROPFIND and REPORT method handler
*
* @param array general parameter passing array
* @param array return array for file properties
* @return bool true on success
*/
function PROPFIND(&$options, &$files,$method='PROPFIND')
{
if ($this->debug) error_log(__CLASS__."::$method(".str_replace(array("\n",' ',"\t"),'',print_r($options,true)).')');
// parse path in form [/account_lid]/app[/more]
if (!self::_parse_path($options['path'],$id,$app,$user) && $app && !$user)
{
if ($this->debug > 1) error_log(__CLASS__."::$method: user=$user, app=$app, id=$id: 404 not found!");
return '404 Not Found';
}
if ($this->debug > 1) error_log(__CLASS__."::$method: user=$user, app='$app', id=$id");
$files = array();
if (!$app) // root folder containing apps
{
$files['files'][] = array(
'path' => '/',
'props' => array(
self::mkprop('displayname','eGroupWare'),
self::mkprop('resourcetype','collection'),
// adding the calendar extra property (calendar-home-set, etc.) here, allows apple iCal to "autodetect" the URL
self::mkprop(groupdav::CALDAV,'calendar-home-set',$_SERVER['SCRIPT_NAME'].'/calendar/'),
),
);
foreach($this->root as $app => $data)
{
if (!$GLOBALS['egw_info']['user']['apps'][$app]) continue; // no rights for the given app
$extra_props = 'groupdav_'.$app.'::extra_properties';
$files['files'][] = array(
'path' => '/'.$app.'/',
'props' => call_user_func('groupdav_'.$app.'::extra_properties',array(
self::mkprop('displayname',$this->translation->convert(lang($app),$this->egw_charset,'utf-8')),
self::mkprop('resourcetype',$this->_resourcetype($app)),
)),
);
}
return true;
}
if (!$GLOBALS['egw_info']['user']['apps'][$app])
{
error_log(__CLASS__."::$method(path=$options[path]) 403 Forbidden: no app rights");
return '403 Forbidden'; // no rights for the given app
}
if (($handler = groupdav_handler::app_handler($app,$this->debug)))
{
if ($method != 'REPORT' && !$id) // no self URL for REPORT requests (only PROPFIND) or propfinds on an id
{
$files['files'][] = array(
'path' => '/'.$app.'/',
'props' => $handler->extra_properties(array(
self::mkprop('displayname',$this->translation->convert(lang($app),$this->egw_charset,'utf-8')),
// Kontact doubles the folder, if the self URL contains the GroupDAV/CalDAV resourcetypes
self::mkprop('resourcetype', $this->_resourcetype($app,strpos($_SERVER['HTTP_USER_AGENT'],'KHTML') !== false)),
)),
);
}
return $handler->propfind($options['path'],$options,$files,$user,$id);
}
return '501 Not Implemented';
}
/**
* Return resourcetype(s) for a given app
*
* @param string $app
* @param boolean $no_extra_types=false should the GroupDAV and CalDAV types be added (Kontact has problems with it in self URL)
* @return array or DAV properties generated via
*/
function _resourcetype($app,$no_extra_types=false)
{
$resourcetype = array(
self::mkprop('collection','collection'),
);
if (!$no_extra_types)
{
foreach($this->root[$app] as $ns => $type)
{
$resourcetype[] = self::mkprop($ns,'resourcetype', $type);
}
}
return $resourcetype;
}
/**
* CalDAV/CardDAV REPORT method handler
*
* just calls PROPFIND()
*
* @param array general parameter passing array
* @param array return array for file properties
* @return bool true on success
*/
function REPORT(&$options, &$files)
{
if ($this->debug > 1) error_log(__METHOD__.'('.str_replace(array("\n",' '),'',print_r($options,true)).')');
return $this->PROPFIND($options,$files,'REPORT');
}
/**
* CalDAV/CardDAV REPORT method handler to get HTTP_WebDAV_Server to process REPORT requests
*
* Just calls http_PROPFIND()
*/
function http_REPORT()
{
parent::http_PROPFIND('REPORT');
}
/**
* GET method handler
*
* @param array parameter passing array
* @return bool true on success
*/
function GET(&$options)
{
if ($this->debug) error_log(__METHOD__.'('.print_r($options,true).')');
if (!$this->_parse_path($options['path'],$id,$app,$user))
{
return '404 Not Found';
}
if (($handler = groupdav_handler::app_handler($app,$this->debug)))
{
return $handler->get($options,$id);
}
return '501 Not Implemented';
}
/**
* PUT method handler
*
* @param array parameter passing array
* @return bool true on success
*/
function PUT(&$options)
{
// read the content in a string, if a stream is given
if (isset($options['stream']))
{
$options['content'] = '';
while(!feof($options['stream']))
{
$options['content'] .= fread($options['stream'],8192);
}
}
if ($this->debug) error_log(__METHOD__.'('.print_r($options,true).')');
if (!$this->_parse_path($options['path'],$id,$app,$user))
{
return '404 Not Found';
}
if (($handler = groupdav_handler::app_handler($app,$this->debug)))
{
$status = $handler->put($options,$id,$user);
// set default stati: true --> 204 No Content, false --> should be already handled
if (is_bool($status)) $status = $status ? '204 No Content' : '400 Something went wrong';
return $status;
}
return '501 Not Implemented';
}
/**
* DELETE method handler
*
* @param array general parameter passing array
* @return bool true on success
*/
function DELETE($options)
{
if ($this->debug) error_log(__METHOD__.'('.print_r($options,true).')');
if (!$this->_parse_path($options['path'],$id,$app,$user))
{
return '404 Not Found';
}
if (($handler = groupdav_handler::app_handler($app,$this->debug)))
{
$status = $handler->delete($options,$id);
// set default stati: true --> 204 No Content, false --> should be already handled
if (is_bool($status)) $status = $status ? '204 No Content' : '400 Something went wrong';
return $status;
}
return '501 Not Implemented';
}
/**
* MKCOL method handler
*
* @param array general parameter passing array
* @return bool true on success
*/
function MKCOL($options)
{
if ($this->debug) error_log(__METHOD__.'('.print_r($options,true).')');
return '501 Not Implemented';
}
/**
* MOVE method handler
*
* @param array general parameter passing array
* @return bool true on success
*/
function MOVE($options)
{
if ($this->debug) error_log(__METHOD__.'('.print_r($options,true).')');
return '501 Not Implemented';
}
/**
* COPY method handler
*
* @param array general parameter passing array
* @return bool true on success
*/
function COPY($options, $del=false)
{
if ($this->debug) error_log('groupdav::'.($del ? 'MOVE' : 'COPY').'('.print_r($options,true).')');
return '501 Not Implemented';
}
/**
* LOCK method handler
*
* @param array general parameter passing array
* @return bool true on success
*/
function LOCK(&$options)
{
error_log(__METHOD__.'('.str_replace(array("\n",' '),'',print_r($options,true)).')');
self::_parse_path($options['path'],$id,$app,$user);
$path = egw_vfs::app_entry_lock_path($app,$id);
// get the app handler, to check if the user has edit access to the entry (required to make locks)
$handler = groupdav_handler::app_handler($app);
// TODO recursive locks on directories not supported yet
if (!$id || !empty($options['depth']) || !$handler->check_access(EGW_ACL_EDIT,$id))
{
return '409 Conflict';
}
$options['timeout'] = time()+300; // 5min. hardcoded
// dont know why, but HTTP_WebDAV_Server passes the owner in D:href tags, which get's passed unchanged to checkLock/PROPFIND
// that's wrong according to the standard and cadaver does not show it on discover --> strip_tags removes eventual tags
if (($ret = egw_vfs::lock($path,$options['locktoken'],$options['timeout'],strip_tags($options['owner']),
$options['scope'],$options['type'],isset($options['update']),false)) && !isset($options['update'])) // false = no ACL check
{
return $ret ? '200 OK' : '409 Conflict';
}
return $ret;
}
/**
* UNLOCK method handler
*
* @param array general parameter passing array
* @return bool true on success
*/
function UNLOCK(&$options)
{
self::_parse_path($options['path'],$id,$app,$user);
$path = egw_vfs::app_entry_lock_path($app,$id);
error_log(__METHOD__.'('.str_replace(array("\n",' '),'',print_r($options,true)).") path=$path");
return egw_vfs::unlock($path,$options['token']) ? '204 No Content' : '409 Conflict';
}
/**
* checkLock() helper
*
* @param string resource path to check for locks
* @return bool true on success
*/
function checkLock($path)
{
self::_parse_path($path,$id,$app,$user);
$path = egw_vfs::app_entry_lock_path($app,$id);
return egw_vfs::checkLock($path);
}
/**
* Parse a path into it's id, app and user parts
*
* @param string $path
* @param int &$id
* @param string &$app addressbook, calendar, infolog (=infolog)
* @param int &$user
* @return boolean true on success, false on error
*/
function _parse_path($path,&$id,&$app,&$user)
{
$parts = explode('/',$path);
list($id) = explode('.',array_pop($parts)); // remove evtl. .ics extension
$app = array_pop($parts);
if (($user = array_pop($parts)))
{
$user = $GLOBALS['egw']->accounts->name2id($user,'account_lid',$app != 'addressbook' ? 'u' : null);
}
else
{
$user = $GLOBALS['egw_info']['user']['account_id'];
}
if (!($ok = $id && in_array($app,array('addressbook','calendar','infolog')) && $user))
{
error_log(__METHOD__."('$path') returning false: id=$id, app='$app', user=$user");
}
return $ok;
}
}