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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
{
var $dav_powered_by = 'eGroupWare WebDAV server';
/**
* 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($query); */
// recursive delete the directory
if ($dir = egw_vfs::dir_opendir($options["path"]))
{
while(($file = readdir($dir)))
{
if ($file == '.' || $file == '..') continue;
if (is_dir($path.'/'.$file))
{
// recursivly call ourself with the dir
$opts = $options;
$opts['path'] .= '/'.$file;
$this->DELETE($opts);
}
else
{
unlink($path.'/'.$file);
}
}
closedir($dir);
}
}
else
{
unlink($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 clase 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"][] = $this->mkprop("displayname", strtoupper($path));
// creation and modification time
$info["props"][] = $this->mkprop("creationdate", filectime($fspath));
$info["props"][] = $this->mkprop("getlastmodified", filemtime($fspath));
// type and size (caller already made sure that path exists)
if (is_dir($fspath)) {
// directory (WebDAV collection)
$info["props"][] = $this->mkprop("resourcetype", "collection");
$info["props"][] = $this->mkprop("getcontenttype", "httpd/unix-directory");
} else {
// plain file (WebDAV resource)
$info["props"][] = $this->mkprop("resourcetype", "");
if (egw_vfs::is_readable($path)) {
$info["props"][] = $this->mkprop("getcontenttype", egw_vfs::mime_content_type($path));
} else {
error_log(__METHOD__."($path) $fspath is not readable!");
$info["props"][] = $this->mkprop("getcontenttype", "application/x-non-readable");
}
$info["props"][] = $this->mkprop("getcontentlength", filesize($fspath));
}
/*
// 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"][] = $this->mkprop($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 ...
}
/**
* LOCK method handler
*
* @param array general parameter passing array
* @return bool true on success
*/
function LOCK(&$options)
{
// behaving like LOCK is not implemented
return "412 Precondition failed";
/*
// get absolute fs path to requested resource
$fspath = $this->base . $options["path"];
// TODO recursive locks on directories not supported yet
if (is_dir($fspath) && !empty($options["depth"])) {
return "409 Conflict";
}
$options["timeout"] = time()+300; // 5min. hardcoded
if (isset($options["update"])) { // Lock Update
$where = "WHERE path = '$options[path]' AND token = '$options[update]'";
$query = "SELECT owner, exclusivelock FROM {$this->db_prefix}locks $where";
$res = mysql_query($query);
$row = mysql_fetch_assoc($res);
mysql_free_result($res);
if (is_array($row)) {
$query = "UPDATE {$this->db_prefix}locks
SET expires = '$options[timeout]'
, modified = ".time()."
$where";
mysql_query($query);
$options['owner'] = $row['owner'];
$options['scope'] = $row["exclusivelock"] ? "exclusive" : "shared";
$options['type'] = $row["exclusivelock"] ? "write" : "read";
return true;
} else {
return false;
}
}
$query = "INSERT INTO {$this->db_prefix}locks
SET token = '$options[locktoken]'
, path = '$options[path]'
, created = ".time()."
, modified = ".time()."
, owner = '$options[owner]'
, expires = '$options[timeout]'
, exclusivelock = " .($options['scope'] === "exclusive" ? "1" : "0")
;
mysql_query($query);
return mysql_affected_rows() ? "200 OK" : "409 Conflict";*/
}
/**
* UNLOCK method handler
*
* @param array general parameter passing array
* @return bool true on success
*/
function UNLOCK(&$options)
{
// behaving like LOCK is not implemented
return "405 Method not allowed";
/*
$query = "DELETE FROM {$this->db_prefix}locks
WHERE path = '$options[path]'
AND token = '$options[token]'";
mysql_query($query);
return mysql_affected_rows() ? "204 No Content" : "409 Conflict";*/
}
/**
* checkLock() helper
*
* @param string resource path to check for locks
* @return bool true on success
*/
function checkLock($path)
{
// behave like checkLock is not implemented
return false;
/*
$result = false;
$query = "SELECT owner, token, created, modified, expires, exclusivelock
FROM {$this->db_prefix}locks
WHERE path = '$path'
";
$res = mysql_query($query);
if ($res) {
$row = mysql_fetch_array($res);
mysql_free_result($res);
if ($row) {
$result = array( "type" => "write",
"scope" => $row["exclusivelock"] ? "exclusive" : "shared",
"depth" => 0,
"owner" => $row['owner'],
"token" => $row['token'],
"created" => $row['created'],
"modified" => $row['modified'],
"expires" => $row['expires']
);
}
}
return $result;*/
}
/**
* Remove not (yet) implemented LOCK methods, so we can use the mostly unchanged HTTP_WebDAV_Server_Filesystem class
*
* @return array
*/
function _allow()
{
$allow = parent::_allow();
unset($allow['LOCK']);
unset($allow['UNLOCK']);
return $allow;
}
}
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