egroupware/phpgwapi/inc/class.vfs_webdav_server.inc.php

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<?php
/**
* eGroupWare API: VFS - WebDAV access using the new stream wrapper VFS interface
*
* Using the PEAR HTTP/WebDAV/Server/Filesystem 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 vfs
* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @author Hartmut Holzgraefe <hartmut@php.net> original HTTP/WebDAV/Server/Filesystem class, of which some code is used
* @version $Id$
*/
require_once('HTTP/WebDAV/Server/Filesystem.php');
/**
* FileManger - WebDAV access using the new stream wrapper VFS interface
*
* Using the PEAR HTTP/WebDAV/Server/Filesystem class (which need to be installed!)
*
* @todo table to store locks and properties
* @todo filesystem class uses PEAR's System::find which we dont require nor know if it works on custom streamwrapper
*/
class vfs_webdav_server extends HTTP_WebDAV_Server_Filesystem
{
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/**
* Realm of eGW's WebDAV server
*
*/
const REALM = 'eGroupWare WebDAV server';
var $dav_powered_by = self::REALM;
/**
* Base directory is the URL of our VFS root
*
* @var string
*/
var $base = egw_vfs::PREFIX;
/**
* Debug level: 0 = nothing, 1 = function calls, 2 = more info, eg. complete $_SERVER array
*
* The debug messages are send to the apache error_log
*
* @var integer
*/
var $debug = 0;
/**
* Serve a webdav request
*
* Reimplemented to not check our vfs base path with realpath and connect to mysql DB
*
* @access public
* @param string
*/
function ServeRequest($base = false)
{
// special treatment for litmus compliance test
// reply on its identifier header
// not needed for the test itself but eases debugging
if (function_exists('apache_request_headers'))
{
foreach (apache_request_headers() as $key => $value)
{
if (stristr($key, 'litmus'))
{
error_log("Litmus test $value");
header('X-Litmus-reply: '.$value);
}
}
}
// let the base class do all the work
HTTP_WebDAV_Server::ServeRequest();
}
/**
* DELETE method handler
*
* @param array general parameter passing array
* @return bool true on success
*/
function DELETE($options)
{
$path = $this->base . $options['path'];
if (!file_exists($path))
{
return '404 Not found';
}
if (is_dir($path))
{
/*$query = "DELETE FROM {$this->db_prefix}properties
WHERE path LIKE '".$this->_slashify($options["path"])."%'";
mysql_query($query); */
// recursive delete the directory
egw_vfs::remove($options['path']);
}
else
{
unlink($path);
}
/*$query = "DELETE FROM {$this->db_prefix}properties
WHERE path = '$options[path]'";
mysql_query($query);*/
return '204 No Content';
}
/**
* Get properties for a single file/resource
*
* @param string resource path
* @return array resource properties
*/
function fileinfo($path)
{
//error_log(__METHOD__."($path)");
// map URI path to filesystem path
$fspath = $this->base . $path;
// create result array
$info = array();
// TODO remove slash append code when base class is able to do it itself
$info['path'] = is_dir($fspath) ? $this->_slashify($path) : $path;
$info['props'] = array();
// no special beautified displayname here ...
$info['props'][] = HTTP_WebDAV_Server::mkprop ('displayname', strtoupper($path));
// creation and modification time
$info['props'][] = HTTP_WebDAV_Server::mkprop ('creationdate', filectime($fspath));
$info['props'][] = HTTP_WebDAV_Server::mkprop ('getlastmodified', filemtime($fspath));
// type and size (caller already made sure that path exists)
if (is_dir($fspath)) {
// directory (WebDAV collection)
$info['props'][] = HTTP_WebDAV_Server::mkprop ('resourcetype', 'collection');
$info['props'][] = HTTP_WebDAV_Server::mkprop ('getcontenttype', 'httpd/unix-directory');
} else {
// plain file (WebDAV resource)
$info['props'][] = HTTP_WebDAV_Server::mkprop ('resourcetype', '');
if (egw_vfs::is_readable($path)) {
$info['props'][] = HTTP_WebDAV_Server::mkprop ('getcontenttype', egw_vfs::mime_content_type($path));
} else {
error_log(__METHOD__."($path) $fspath is not readable!");
$info['props'][] = HTTP_WebDAV_Server::mkprop ('getcontenttype', 'application/x-non-readable');
}
$info['props'][] = HTTP_WebDAV_Server::mkprop ('getcontentlength', filesize($fspath));
}
// supportedlock property
$info['props'][] = HTTP_WebDAV_Server::mkprop('supportedlock','
<D:lockentry>
<D:lockscope><D:exclusive/></D:lockscope>
<D:locktype><D:write/></D:lockscope>
</D:lockentry>
<D:lockentry>
<D:lockscope><D:shared/></D:lockscope>
<D:locktype><D:write/></D:lockscope>
</D:lockentry>');
// ToDo: etag from inode and modification time
/*
// get additional properties from database
$query = "SELECT ns, name, value
FROM {$this->db_prefix}properties
WHERE path = '$path'";
$res = mysql_query($query);
while ($row = mysql_fetch_assoc($res)) {
$info["props"][] = HTTP_WebDAV_Server::mkprop ($row["ns"], $row["name"], $row["value"]);
}
mysql_free_result($res);
*/
//error_log(__METHOD__."($path) info=".print_r($info,true));
return $info;
}
/**
* Used eg. by get
*
* @todo replace all calls to _mimetype with egw_vfs::mime_content_type()
* @param string $path
* @return string
*/
function _mimetype($path)
{
return egw_vfs::mime_content_type($path);
}
/**
* PROPPATCH method handler
*
* The current version only allows Webdrive to set creation and modificaton dates.
* They are not stored as (arbitrary) WebDAV properties with their own namespace and name,
* but in the regular vfs attributes.
*
* @todo Store a properties in the DB and retrieve them in PROPFIND again.
* @param array general parameter passing array
* @return bool true on success
*/
function PROPPATCH(&$options)
{
$path = $GLOBALS['egw']->translation->convert($options['path'],'utf-8');
foreach ($options['props'] as $key => $prop) {
$attributes = array();
switch($prop['ns'])
{
// allow Webdrive to set creation and modification time
case 'http://www.southrivertech.com/':
switch($prop['name'])
{
case 'srt_modifiedtime':
case 'getlastmodified':
egw_vfs::touch($path,strtotime($prop['val']));
break;
case 'srt_creationtime':
// not supported via the streamwrapper interface atm.
//$attributes['created'] = strtotime($prop['val']);
break;
}
break;
case 'DAV:':
switch($prop['name'])
{
// allow netdrive to change the modification time
case 'getlastmodified':
egw_vfs::touch($path,strtotime($prop['val']));
break;
// not sure why, the filesystem example of the WebDAV class does it ...
default:
$options['props'][$key]['status'] = '403 Forbidden';
break;
}
break;
}
if ($this->debug) $props[] = '('.$prop['ns'].')'.$prop['name'].'='.$prop['val'];
}
if ($this->debug)
{
error_log(__METHOD__.": path=$options[path], props=".implode(', ',$props));
if ($attributes) error_log(__METHOD__.": path=$options[path], set attributes=".str_replace("\n",' ',print_r($attributes,true)));
}
return ''; // this is as the filesystem example handler does it, no true or false ...
}
/**
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* 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)).')');
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// TODO recursive locks on directories not supported yet
if (is_dir($this->base . $options['path']) && !empty($options['depth']))
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{
return '409 Conflict';
}
$options['timeout'] = time()+300; // 5min. hardcoded
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// dont know why, but HTTP_WebDAV_Server passes the owner in D:href tags, which get's passed unchanged to checkLock/PROPFIND
// that's wrong according to the standard and cadaver does not show it on discover --> strip_tags removes eventual tags
if (($ret = egw_vfs::lock($options['path'],$options['locktoken'],$options['timeout'],strip_tags($options['owner']),
$options['scope'],$options['type'],isset($options['update']))) && !isset($options['update']))
{
return $ret ? '200 OK' : '409 Conflict';
}
return $ret;
}
/**
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* UNLOCK method handler
*
* @param array general parameter passing array
* @return bool true on success
*/
function UNLOCK(&$options)
{
error_log(__METHOD__.'('.str_replace(array("\n",' '),'',print_r($options,true)).')');
return egw_vfs::unlock($options['path'],$options['token']) ? '204 No Content' : '409 Conflict';
}
/**
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* checkLock() helper
*
* @param string resource path to check for locks
* @return bool true on success
*/
function checkLock($path)
{
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return egw_vfs::checkLock($path);
}
}