diff --git a/api/src/Link.php b/api/src/Link.php
index ca2ccef071..7707b4e689 100644
--- a/api/src/Link.php
+++ b/api/src/Link.php
@@ -1300,7 +1300,7 @@ class Link extends Link\Storage
 		if (!is_array($fileinfo))
 		{
 			$url = Vfs\Sqlfs\StreamWrapper::id2path($fileinfo);
-			if (!($fileinfo = Vfs::url_stat($url,STREAM_URL_STAT_QUIET)))
+			if (!($fileinfo = Vfs::stat($url,STREAM_URL_STAT_QUIET)))
 			{
 				return false;
 			}
diff --git a/api/src/Vfs.php b/api/src/Vfs.php
index 492c1d9964..851f1b1e29 100644
--- a/api/src/Vfs.php
+++ b/api/src/Vfs.php
@@ -242,7 +242,8 @@ class Vfs extends Vfs\StreamWrapper
 		{
 			throw new Exception\AssertionFailed("File '$path' is not an absolute path!");
 		}
-		if (($stat = self::url_stat($path,0,$try_create_home)))
+		$vfs = new Vfs\StreamWrapper();
+		if (($stat = $vfs->url_stat($path,0,$try_create_home)))
 		{
 			$stat = array_slice($stat,13);	// remove numerical indices 0-12
 		}
@@ -262,7 +263,8 @@ class Vfs extends Vfs\StreamWrapper
 		{
 			throw new Exception\AssertionFailed("File '$path' is not an absolute path!");
 		}
-		if (($stat = self::url_stat($path,STREAM_URL_STAT_LINK,$try_create_home)))
+		$vfs = new Vfs\StreamWrapper();
+		if (($stat = $vfs->url_stat($path,STREAM_URL_STAT_LINK,$try_create_home)))
 		{
 			$stat = array_slice($stat,13);	// remove numerical indices 0-12
 		}
@@ -683,7 +685,8 @@ class Vfs extends Vfs\StreamWrapper
 		}
 		else
 		{
-			$stat = self::url_stat($path,STREAM_URL_STAT_LINK);
+			$vfs = new Vfs\StreamWrapper();
+			$stat = $vfs->url_stat($path,STREAM_URL_STAT_LINK);
 		}
 		if (!$stat)
 		{
@@ -802,11 +805,12 @@ class Vfs extends Vfs\StreamWrapper
 		{
 			$url = self::PREFIX . $url;
 		}
+		$vfs = new Vfs\StreamWrapper();
 		if (is_dir($url) && !is_link($url))
 		{
-			return self::rmdir($url,0);
+			return $vfs->rmdir($url,0);
 		}
-		return self::unlink($url);
+		return $vfs->unlink($url);
 	}
 
 	/**
@@ -847,7 +851,8 @@ class Vfs extends Vfs\StreamWrapper
 			{
 				self::clearstatcache($path);
 
-				$path_user_stat[$path][$user] = self::url_stat($path, 0);
+				$vfs = new Vfs\StreamWrapper();
+				$path_user_stat[$path][$user] = $vfs->url_stat($path, 0);
 
 				self::clearstatcache($path);	// we need to clear the stat-cache after the call too, as the next call might be the regular user again!
 			}
@@ -889,7 +894,8 @@ class Vfs extends Vfs\StreamWrapper
 		// query stat array, if not given
 		if (is_null($stat))
 		{
-			$stat = self::url_stat($path,0);
+			if (!isset($vfs)) $vfs = new Vfs\StreamWrapper();
+			$stat = $vfs->url_stat($path,0);
 		}
 		//error_log(__METHOD__."(path=$path||stat[name]={$stat['name']},stat[mode]=".sprintf('%o',$stat['mode']).",$check)");
 
@@ -1346,8 +1352,11 @@ class Vfs extends Vfs\StreamWrapper
 	 */
 	static function has_owner_rights($path,array $stat=null)
 	{
-		if (!$stat) $stat = self::url_stat($path,0);
-
+		if (!$stat)
+		{
+			$vfs = new Vfs\StreamWrapper();
+			$stat = $vfs->url_stat($path,0);
+		}
 		return $stat['uid'] == self::$user ||	// user is the owner
 			self::$is_root ||					// class runs with root rights
 			!$stat['uid'] && $stat['gid'] && self::$is_admin;	// group directory and user is an eGW admin
@@ -2020,11 +2029,12 @@ class Vfs extends Vfs\StreamWrapper
 	{
 		if (self::is_dir($dst))
 		{
+			$vfs = new Vfs\StreamWrapper();
 			foreach($src as $file)
 			{
 				$target = self::concat($dst, self::basename($file));
 
-				if ($file != $target && self::rename($file, $target))
+				if ($file != $target && $vfs->rename($file, $target))
 				{
 					$moved[] = $file;
 				}
diff --git a/api/src/Vfs/Dav/File.php b/api/src/Vfs/Dav/File.php
index 78a52d00b9..28472c836c 100644
--- a/api/src/Vfs/Dav/File.php
+++ b/api/src/Vfs/Dav/File.php
@@ -66,7 +66,7 @@ class File extends DAV\FS\File
 	 */
 	function getETag()
 	{
-		if (($stat = Vfs::url_stat($this->vfs_path, STREAM_URL_STAT_QUIET)))
+		if (($stat = Vfs::stat($this->vfs_path, STREAM_URL_STAT_QUIET)))
 		{
 			return '"'.$stat['ino'].':'.$stat['mtime'].':'.$stat['size'].'"';
 		}
diff --git a/api/src/Vfs/Filesystem/StreamWrapper.php b/api/src/Vfs/Filesystem/StreamWrapper.php
index b39b08d352..6646865e4a 100644
--- a/api/src/Vfs/Filesystem/StreamWrapper.php
+++ b/api/src/Vfs/Filesystem/StreamWrapper.php
@@ -306,7 +306,7 @@ class StreamWrapper implements Vfs\StreamWrapperIface
 	 * @param string $url
 	 * @return boolean TRUE on success or FALSE on failure
 	 */
-	static function unlink ( $url )
+	function unlink ( $url )
 	{
 		$path = Vfs::decodePath(Vfs::parse_url($url,PHP_URL_PATH));
 
@@ -331,7 +331,7 @@ class StreamWrapper implements Vfs\StreamWrapperIface
 	 * @param string $url_to
 	 * @return boolean TRUE on success or FALSE on failure
 	 */
-	static function rename ( $url_from, $url_to )
+	function rename ( $url_from, $url_to )
 	{
 		$from = Vfs::parse_url($url_from);
 		$to   = Vfs::parse_url($url_to);
@@ -381,7 +381,7 @@ class StreamWrapper implements Vfs\StreamWrapperIface
 	 * @param int $options Posible values include STREAM_REPORT_ERRORS and STREAM_MKDIR_RECURSIVE
 	 * @return boolean TRUE on success or FALSE on failure
 	 */
-	static function mkdir ( $url, $mode, $options )
+	function mkdir ( $url, $mode, $options )
 	{
 		unset($mode);	// not used, but required by interface
 
@@ -415,7 +415,7 @@ class StreamWrapper implements Vfs\StreamWrapperIface
 	 * @param int $options Possible values include STREAM_REPORT_ERRORS.
 	 * @return boolean TRUE on success or FALSE on failure.
 	 */
-	static function rmdir ( $url, $options )
+	function rmdir ( $url, $options )
 	{
 		unset($options);	// not used, but required by interface
 
@@ -552,7 +552,7 @@ class StreamWrapper implements Vfs\StreamWrapperIface
 	 *                          stat triggers it's own warning anyway, so it makes no sense to trigger one by our stream-wrapper!
 	 * @return array
 	 */
-	static function url_stat ( $url, $flags )
+	function url_stat ( $url, $flags )
 	{
 		$parts = Vfs::parse_url($url);
 		$path = Vfs::decodePath($parts['path']);
diff --git a/api/src/Vfs/Links/StreamWrapper.php b/api/src/Vfs/Links/StreamWrapper.php
index 9564a3aa62..e74124e875 100644
--- a/api/src/Vfs/Links/StreamWrapper.php
+++ b/api/src/Vfs/Links/StreamWrapper.php
@@ -137,7 +137,7 @@ class StreamWrapper extends LinksParent
 	 *                          stat triggers it's own warning anyway, so it makes no sense to trigger one by our stream-wrapper!
 	 * @return array
 	 */
-	static function url_stat ( $url, $flags )
+	function url_stat ( $url, $flags )
 	{
 		$eacl_check=self::check_extended_acl($url,Vfs::READABLE);
 
@@ -232,7 +232,7 @@ class StreamWrapper extends LinksParent
 	 * @param int $options Posible values include STREAM_REPORT_ERRORS and STREAM_MKDIR_RECURSIVE, we allways use recursive!
 	 * @return boolean TRUE on success or FALSE on failure
 	 */
-	static function mkdir($path,$mode,$options)
+	function mkdir($path,$mode,$options)
 	{
 		unset($mode);	// not used, but required by function signature
 
diff --git a/api/src/Vfs/Sqlfs/StreamWrapper.php b/api/src/Vfs/Sqlfs/StreamWrapper.php
index ab93cd8c08..fae15a835b 100644
--- a/api/src/Vfs/Sqlfs/StreamWrapper.php
+++ b/api/src/Vfs/Sqlfs/StreamWrapper.php
@@ -543,7 +543,7 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 	 * @param string $url
 	 * @return boolean TRUE on success or FALSE on failure
 	 */
-	static function unlink ( $url, $parent_stat=null )
+	function unlink ( $url, $parent_stat=null )
 	{
 		if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url)");
 
@@ -553,10 +553,10 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 		if (!isset($parent_stat))
 		{
 			$parent_stat = !($dir = Vfs::dirname($path)) ? false :
-				static::url_stat($dir, STREAM_URL_STAT_LINK);
+				$this->url_stat($dir, STREAM_URL_STAT_LINK);
 		}
 
-		if (!$parent_stat || !($stat = self::url_stat($path,STREAM_URL_STAT_LINK)) ||
+		if (!$parent_stat || !($stat = $this->url_stat($path,STREAM_URL_STAT_LINK)) ||
 			!$dir || !Vfs::check_access($dir, Vfs::WRITABLE, $parent_stat))
 		{
 			self::_remove_password($url);
@@ -599,7 +599,7 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 	 * @param string $url_to
 	 * @return boolean TRUE on success or FALSE on failure
 	 */
-	static function rename ( $url_from, $url_to)
+	function rename ( $url_from, $url_to)
 	{
 		if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url_from,$url_to)");
 
@@ -693,13 +693,13 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 	 * @param int $options Posible values include STREAM_REPORT_ERRORS and STREAM_MKDIR_RECURSIVE
 	 * @return boolean TRUE on success or FALSE on failure
 	 */
-	static function mkdir ( $url, $mode, $options )
+	function mkdir ( $url, $mode, $options )
 	{
 		if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url,$mode,$options)");
 		if (self::LOG_LEVEL > 1) error_log(__METHOD__." called from:".function_backtrace());
 		$path = Vfs::parse_url($url,PHP_URL_PATH);
 
-		if (self::url_stat($path,STREAM_URL_STAT_QUIET))
+		if ($this->url_stat($path,STREAM_URL_STAT_QUIET))
 		{
 			self::_remove_password($url);
 			if (self::LOG_LEVEL) error_log(__METHOD__."('$url',$mode,$options) already exist!");
@@ -720,7 +720,7 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 			return false;
 		}
 		if (($query = Vfs::parse_url($url,PHP_URL_QUERY))) $parent_path .= '?'.$query;
-		$parent = self::url_stat($parent_path,STREAM_URL_STAT_QUIET);
+		$parent = $this->url_stat($parent_path,STREAM_URL_STAT_QUIET);
 
 		// check if we should also create all non-existing path components and our parent does not exist,
 		// if yes call ourself recursive with the parent directory
@@ -731,7 +731,7 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 			{
 				return false;
 			}
-			$parent = self::url_stat($parent_path,0);
+			$parent = $this->url_stat($parent_path,0);
 		}
 		if (!$parent || !Vfs::check_access($parent_path,Vfs::WRITABLE,$parent))
 		{
@@ -788,14 +788,14 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 	 * @param int $options Possible values include STREAM_REPORT_ERRORS.
 	 * @return boolean TRUE on success or FALSE on failure.
 	 */
-	static function rmdir ( $url, $options )
+	function rmdir ( $url, $options )
 	{
 		if (self::LOG_LEVEL > 1) error_log(__METHOD__."($url)");
 
 		$path = Vfs::parse_url($url,PHP_URL_PATH);
 
 		if (!($parent = Vfs::dirname($path)) ||
-			!($stat = self::url_stat($path, 0)) || $stat['mime'] != self::DIR_MIME_TYPE ||
+			!($stat = $this->url_stat($path, 0)) || $stat['mime'] != self::DIR_MIME_TYPE ||
 			!Vfs::check_access($parent, Vfs::WRITABLE, static::url_stat($parent,0)))
 		{
 			self::_remove_password($url);
@@ -849,7 +849,8 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 
 		$path = Vfs::parse_url($url,PHP_URL_PATH);
 
-		if (!($stat = self::url_stat($path,STREAM_URL_STAT_QUIET)))
+		$vfs = new self();
+		if (!($stat = $vfs->url_stat($path,STREAM_URL_STAT_QUIET)))
 		{
 			// file does not exist --> create an empty one
 			if (!($f = fopen(self::SCHEME.'://default'.$path,'w')) || !fclose($f))
@@ -860,7 +861,7 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 			{
 				return true;	// new (empty) file created with current mod time
 			}
-			$stat = self::url_stat($path,0);
+			$stat = $vfs->url_stat($path,0);
 		}
 		unset(self::$stat_cache[$path]);
 		$stmt = self::$pdo->prepare('UPDATE '.self::TABLE.' SET fs_modified=:fs_modified,fs_modifier=:fs_modifier WHERE fs_id=:fs_id');
@@ -885,7 +886,8 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 
 		$path = Vfs::parse_url($url,PHP_URL_PATH);
 
-		if (!($stat = self::url_stat($path,0)))
+		$vfs = new self();
+		if (!($stat = $vfs->url_stat($path,0)))
 		{
 			if (self::LOG_LEVEL) error_log(__METHOD__."($url,$owner) no such file or directory!");
 			trigger_error("No such file or directory $url !",E_USER_WARNING);
@@ -929,7 +931,8 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 
 		$path = Vfs::parse_url($url,PHP_URL_PATH);
 
-		if (!($stat = self::url_stat($path,0)))
+		$vfs = new self();
+		if (!($stat = $vfs->url_stat($path,0)))
 		{
 			if (self::LOG_LEVEL) error_log(__METHOD__."($url,$owner) no such file or directory!");
 			trigger_error("No such file or directory $url !",E_USER_WARNING);
@@ -974,7 +977,8 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 
 		$path = Vfs::parse_url($url,PHP_URL_PATH);
 
-		if (!($stat = self::url_stat($path,0)))
+		$vfs = new self();
+		if (!($stat = $vfs->url_stat($path,0)))
 		{
 			if (self::LOG_LEVEL) error_log(__METHOD__."($url, $mode) no such file or directory!");
 			trigger_error("No such file or directory $url !",E_USER_WARNING);
@@ -1018,7 +1022,7 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 
 		$path = Vfs::parse_url($url,PHP_URL_PATH);
 
-		if (!($stat = self::url_stat($url,0)) || 		// dir not found
+		if (!($stat = $this->url_stat($url,0)) || 		// dir not found
 			$stat['mime'] != self::DIR_MIME_TYPE ||		// no dir
 			!Vfs::check_access($url,Vfs::EXECUTABLE|Vfs::READABLE,$stat))	// no access
 		{
@@ -1078,7 +1082,7 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 	 * @param boolean $eacl_access =null allows extending classes to pass the value of their check_extended_acl() method (no lsb!)
 	 * @return array
 	 */
-	static function url_stat ( $url, $flags, $eacl_access=null )
+	function url_stat ( $url, $flags, $eacl_access=null )
 	{
 		static $max_subquery_depth=null;
 		if (is_null($max_subquery_depth))
@@ -1187,7 +1191,7 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 			error_log(__METHOD__."() decremented max_subquery_depth to $max_subquery_depth");
 			Api\Config::save_value('max_subquery_depth', $max_subquery_depth, 'phpgwapi');
 			if (method_exists($GLOBALS['egw'],'invalidate_session_cache')) $GLOBALS['egw']->invalidate_session_cache();
-			return self::url_stat($url, $flags, $eacl_access);
+			return $this->url_stat($url, $flags, $eacl_access);
 		}
 		self::$stat_cache[$path] = $info;
 
@@ -1284,7 +1288,8 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 	 */
 	static function readlink($path)
 	{
-		$link = !($lstat = self::url_stat($path,STREAM_URL_STAT_LINK)) || is_null($lstat['readlink']) ? false : $lstat['readlink'];
+		$vfs = new self();
+		$link = !($lstat = $vfs->url_stat($path,STREAM_URL_STAT_LINK)) || is_null($lstat['readlink']) ? false : $lstat['readlink'];
 
 		if (self::LOG_LEVEL > 1) error_log(__METHOD__."('$path') = $link");
 
@@ -1302,7 +1307,8 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 	{
 		if (self::LOG_LEVEL > 1) error_log(__METHOD__."('$target','$link')");
 
-		if (self::url_stat($link,0))
+		$vfs = new self();
+		if ($vfs->url_stat($link,0))
 		{
 			if (self::LOG_LEVEL > 0) error_log(__METHOD__."('$target','$link') $link exists, returning false!");
 			return false;	// $link already exists
@@ -1422,7 +1428,8 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 		}
 		if (is_null($fs_id))
 		{
-			if (!($stat = self::url_stat($path,0)))
+			$vfs = new self();
+			if (!($stat = $vfs->url_stat($path,0)))
 			{
 				if (self::LOG_LEVEL) error_log(__METHOD__."($path,$rights,$owner,$fs_id) no such file or directory!");
 				return false;	// $path not found
@@ -1740,7 +1747,7 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 		if (self::LOG_LEVEL > 1) error_log(__METHOD__."(".array2string($path).','.array2string($props));
 		if (!is_numeric($path))
 		{
-			if (!($stat = self::url_stat($path,0)))
+			if (!($stat = $vfs->url_stat($path,0)))
 			{
 				return false;
 			}
@@ -1807,7 +1814,8 @@ class StreamWrapper extends Api\Db\Pdo implements Vfs\StreamWrapperIface
 		{
 			if (!is_numeric($id))
 			{
-				if (!($stat = self::url_stat($id,0)))
+				$vfs = new self();
+				if (!($stat = $vfs->url_stat($id,0)))
 				{
 					if (self::LOG_LEVEL) error_log(__METHOD__."(".array2string($path_ids).",$ns) path '$id' not found!");
 					return false;
diff --git a/api/src/Vfs/Sqlfs/Utils.php b/api/src/Vfs/Sqlfs/Utils.php
index 65857a8bbe..f303328032 100644
--- a/api/src/Vfs/Sqlfs/Utils.php
+++ b/api/src/Vfs/Sqlfs/Utils.php
@@ -150,9 +150,10 @@ class Utils extends StreamWrapper
 		);
 		$stmt = $delete_stmt = null;
 		$msgs = array();
+		$sqlfs = Vfs\Sqlfs();
 		foreach($dirs as $path => $id)
 		{
-			if (!($stat = self::url_stat($path, STREAM_URL_STAT_LINK)))
+			if (!($stat = $sqlfs->url_stat($path, STREAM_URL_STAT_LINK)))
 			{
 				if ($check_only)
 				{
@@ -308,6 +309,7 @@ class Utils extends StreamWrapper
 	{
 		$lostnfound = null;
 		$msgs = array();
+		$sqlfs = Vfs\Sqlfs();
 		foreach(self::$pdo->query('SELECT fs.* FROM '.self::TABLE.' fs'.
 			' LEFT JOIN '.self::TABLE.' dir ON dir.fs_id=fs.fs_dir'.
 			' WHERE fs.fs_id > 1 AND dir.fs_id IS NULL') as $row)
@@ -322,13 +324,13 @@ class Utils extends StreamWrapper
 			if (!isset($lostnfound))
 			{
 				// check if we already have /lost+found, create it if not
-				if (!($lostnfound = self::url_stat(self::LOST_N_FOUND, STREAM_URL_STAT_QUIET)))
+				if (!($lostnfound = $sqlfs->url_stat(self::LOST_N_FOUND, STREAM_URL_STAT_QUIET)))
 				{
 					Vfs::$is_root = true;
 					if (!self::mkdir(self::LOST_N_FOUND, self::LOST_N_FOUND_MOD, 0) ||
 						!(!($admins = $GLOBALS['egw']->accounts->name2id(self::LOST_N_FOUND_GRP)) ||
 						   self::chgrp(self::LOST_N_FOUND, $admins) && self::chmod(self::LOST_N_FOUND,self::LOST_N_FOUND_MOD)) ||
-						!($lostnfound = self::url_stat(self::LOST_N_FOUND, STREAM_URL_STAT_QUIET)))
+						!($lostnfound = $sqlfs->url_stat(self::LOST_N_FOUND, STREAM_URL_STAT_QUIET)))
 					{
 						$msgs[] = lang("Can't create directory %1 to connect found unconnected nodes to it!",self::LOST_N_FOUND);
 					}
diff --git a/api/src/Vfs/StreamWrapper.php b/api/src/Vfs/StreamWrapper.php
index ab9c1329fd..74624a90ca 100644
--- a/api/src/Vfs/StreamWrapper.php
+++ b/api/src/Vfs/StreamWrapper.php
@@ -157,11 +157,11 @@ class StreamWrapper implements StreamWrapperIface
 	 * @param array|boolean &$stat=null on return: stat of existing file or false for non-existing files
 	 * @return string|boolean false if the url cant be resolved, should not happen if fstab has a root entry
 	 */
-	static function resolve_url_symlinks($_path,$file_exists=true,$resolve_last_symlink=true,&$stat=null)
+	function resolve_url_symlinks($_path,$file_exists=true,$resolve_last_symlink=true,&$stat=null)
 	{
 		$path = self::get_path($_path);
 
-		if (!($stat = self::url_stat($path,$resolve_last_symlink?0:STREAM_URL_STAT_LINK)) && !$file_exists)
+		if (!($stat = $this->url_stat($path,$resolve_last_symlink?0:STREAM_URL_STAT_LINK)) && !$file_exists)
 		{
 			$url = null;
 			$stat = self::check_symlink_components($path,0,$url);
@@ -316,7 +316,7 @@ class StreamWrapper implements StreamWrapperIface
 		$this->opened_stream = null;
 
 		$stat = null;
-		if (!($url = self::resolve_url_symlinks($path,$mode[0]=='r',true,$stat)))
+		if (!($url = $this->resolve_url_symlinks($path,$mode[0]=='r',true,$stat)))
 		{
 			return false;
 		}
@@ -489,9 +489,9 @@ class StreamWrapper implements StreamWrapperIface
 	 * @param string $path
 	 * @return boolean TRUE on success or FALSE on failure
 	 */
-	static function unlink ( $path )
+	function unlink ( $path )
 	{
-		if (!($url = self::resolve_url_symlinks($path,true,false)))	// true,false file need to exist, but do not resolve last component
+		if (!($url = $this->resolve_url_symlinks($path,true,false)))	// true,false file need to exist, but do not resolve last component
 		{
 			return false;
 		}
@@ -499,7 +499,7 @@ class StreamWrapper implements StreamWrapperIface
 		{
 			return false;
 		}
-		$stat = self::url_stat($path, STREAM_URL_STAT_LINK);
+		$stat = $this->url_stat($path, STREAM_URL_STAT_LINK);
 
 		self::symlinkCache_remove($path);
 		$ok = unlink($url);
@@ -529,10 +529,10 @@ class StreamWrapper implements StreamWrapperIface
 	 * @param string $path_to
 	 * @return boolean TRUE on success or FALSE on failure
 	 */
-	static function rename ( $path_from, $path_to )
+	function rename ( $path_from, $path_to )
 	{
-		if (!($url_from = self::resolve_url_symlinks($path_from,true,false)) ||
-			!($url_to = self::resolve_url_symlinks($path_to,false)))
+		if (!($url_from = $this->resolve_url_symlinks($path_from,true,false)) ||
+			!($url_to = $this->resolve_url_symlinks($path_to,false)))
 		{
 			return false;
 		}
@@ -547,7 +547,7 @@ class StreamWrapper implements StreamWrapperIface
 			$ret = stream_copy_to_stream($from,$to) !== false;
 			fclose($from);
 			fclose($to);
-			if ($ret) self::unlink($path_from);
+			if ($ret) $this->unlink($path_from);
 		}
 		else
 		{
@@ -582,9 +582,9 @@ class StreamWrapper implements StreamWrapperIface
 	 * @param int $options Posible values include STREAM_REPORT_ERRORS and STREAM_MKDIR_RECURSIVE
 	 * @return boolean TRUE on success or FALSE on failure
 	 */
-	static function mkdir ( $path, $mode, $options )
+	function mkdir ( $path, $mode, $options )
 	{
-		if (!($url = self::resolve_url_symlinks($path,false)))	// false = directory does not need to exists
+		if (!($url = $this->resolve_url_symlinks($path,false)))	// false = directory does not need to exists
 		{
 			return false;
 		}
@@ -612,10 +612,10 @@ class StreamWrapper implements StreamWrapperIface
 	 * @param int $options Possible values include STREAM_REPORT_ERRORS.
 	 * @return boolean TRUE on success or FALSE on failure.
 	 */
-	static function rmdir ( $path, $options )
+	function rmdir ( $path, $options )
 	{
 		unset($options);	// not uses but required by function signature
-		if (!($url = self::resolve_url_symlinks($path)))
+		if (!($url = $this->resolve_url_symlinks($path)))
 		{
 			return false;
 		}
@@ -623,7 +623,7 @@ class StreamWrapper implements StreamWrapperIface
 		{
 			return false;
 		}
-		$stat = self::url_stat($path, STREAM_URL_STAT_LINK);
+		$stat = $this->url_stat($path, STREAM_URL_STAT_LINK);
 
 		self::symlinkCache_remove($path);
 		$ok = rmdir($url);
@@ -658,9 +658,10 @@ class StreamWrapper implements StreamWrapperIface
 		$pathes = $params[$path_param_key];
 
 		$scheme2urls = array();
+		$vfs = new Vfs\StreamWrapper();
 		foreach(is_array($pathes) ? $pathes : array($pathes) as $path)
 		{
-			if (!($url = self::resolve_url_symlinks($path,false,false)))
+			if (!($url = $vfs->resolve_url_symlinks($path,false,false)))
 			{
 				return false;
 			}
@@ -815,7 +816,8 @@ class StreamWrapper implements StreamWrapperIface
 	 */
 	static function mime_content_type($path,$recheck=false)
 	{
-		if (!($url = self::resolve_url_symlinks($path)))
+		$vfs = new self();
+		if (!($url = $vfs->resolve_url_symlinks($path)))
 		{
 			return false;
 		}
@@ -827,7 +829,8 @@ class StreamWrapper implements StreamWrapperIface
 				defined($class.'::STAT_RETURN_MIME_TYPE') &&
 				($mime_attr = constant($class.'::STAT_RETURN_MIME_TYPE')))
 			{
-				$stat = call_user_func(array($class,'url_stat'),self::parse_url($url,PHP_URL_PATH),0);
+				$inst = new $class;
+				$stat = $inst->url_stat(self::parse_url($url,PHP_URL_PATH),0);
 				if ($stat && $stat[$mime_attr])
 				{
 					$mime = $stat[$mime_attr];
@@ -864,7 +867,7 @@ class StreamWrapper implements StreamWrapperIface
 		$this->dir_url_params = array();
 		$this->extra_dir_ptr = 0;
 
-		if (!($this->opened_dir_url = self::resolve_url_symlinks($path)))
+		if (!($this->opened_dir_url = $this->resolve_url_symlinks($path)))
 		{
 			if (self::LOG_LEVEL > 0) error_log(__METHOD__."( $path,$options) resolve_url_symlinks() failed!");
 			return false;
@@ -922,7 +925,7 @@ class StreamWrapper implements StreamWrapperIface
 	 * @param boolean $check_symlink_components =true check if path contains symlinks in path components other then the last one
 	 * @return array
 	 */
-	static function url_stat ( $path, $flags, $try_create_home=false, $check_symlink_components=true, $check_symlink_depth=self::MAX_SYMLINK_DEPTH, $try_reconnect=true )
+	function url_stat ( $path, $flags, $try_create_home=false, $check_symlink_components=true, $check_symlink_depth=self::MAX_SYMLINK_DEPTH, $try_reconnect=true )
 	{
 		if (!($url = self::resolve_url($path,!($flags & STREAM_URL_STAT_LINK), $check_symlink_components)))
 		{
@@ -956,7 +959,7 @@ class StreamWrapper implements StreamWrapperIface
 						$url = Vfs::PREFIX.$lpath;
 						if (self::LOG_LEVEL > 1) error_log(__METHOD__."($path,$flags) symlif (substr($path,-1) == '/' && $path != '/') $path = substr($path,0,-1);	// remove trailing slash eg. added by WebDAVink found and resolved to $url");
 						// try reading the stat of the link
-						if (($stat = self::url_stat($lpath, STREAM_URL_STAT_QUIET, false, true, $check_symlink_depth-1)))
+						if (($stat = $this->url_stat($lpath, STREAM_URL_STAT_QUIET, false, true, $check_symlink_depth-1)))
 						{
 							$stat_query = parse_url($stat['url'], PHP_URL_QUERY);
 							if($u_query || $stat_query)
@@ -982,7 +985,7 @@ class StreamWrapper implements StreamWrapperIface
 			{
 				// reconnect to db
 				Vfs\Sqlfs\StreamWrapper::reconnect();
-				return self::url_stat($path, $flags, $try_create_home, $check_symlink_components, $check_symlink_depth, false);
+				return $this->url_stat($path, $flags, $try_create_home, $check_symlink_components, $check_symlink_depth, false);
 			}
 			// if numer of tries is exceeded, re-throw exception
 			throw $e;
@@ -1000,7 +1003,7 @@ class StreamWrapper implements StreamWrapperIface
 			);
 			call_user_func(array(__NAMESPACE__.'\\Hooks',$hook_data['location']),$hook_data);
 			unset($hook_data);
-			$stat = self::url_stat($path,$flags,false);
+			$stat = $this->url_stat($path,$flags,false);
 		}
 		$query = parse_url($url, PHP_URL_QUERY);
 		if (!$stat && $check_symlink_components)	// check if there's a symlink somewhere inbetween the path
@@ -1043,7 +1046,7 @@ class StreamWrapper implements StreamWrapperIface
 	 * @param string &$url=null already resolved path
 	 * @return array|boolean stat array or false if not found
 	 */
-	static private function check_symlink_components($path,$flags=0,&$url=null)
+	private function check_symlink_components($path,$flags=0,&$url=null)
 	{
 		if (is_null($url) && !($url = self::resolve_url($path)))
 		{
@@ -1055,7 +1058,7 @@ class StreamWrapper implements StreamWrapperIface
 		while (($rel_path = Vfs::basename($url).($rel_path ? '/'.$rel_path : '')) &&
 		       ($url = Vfs::dirname($url)))
 		{
-			if (($stat = self::url_stat($url,0,false,false)))
+			if (($stat = $this->url_stat($url,0,false,false)))
 			{
 				if (is_link($url) && ($lpath = self::readlink($url)))
 				{
@@ -1068,7 +1071,7 @@ class StreamWrapper implements StreamWrapperIface
 					//self::symlinkCache_add($path,Vfs::PREFIX.$lpath);
 					$url = Vfs::PREFIX.Vfs::concat($lpath,$rel_path);
 					if (self::LOG_LEVEL > 1) error_log("$log --> lpath='$lpath', url='$url'");
-					return self::url_stat($url,$flags);
+					return $this->url_stat($url,$flags);
 				}
 				$url = Vfs::concat($url,$rel_path);
 				if (self::LOG_LEVEL > 1) error_log(__METHOD__."('$path',$flags,'$url') returning null");
diff --git a/api/src/Vfs/StreamWrapperIface.php b/api/src/Vfs/StreamWrapperIface.php
index e9ac4e05b9..0003086127 100644
--- a/api/src/Vfs/StreamWrapperIface.php
+++ b/api/src/Vfs/StreamWrapperIface.php
@@ -143,7 +143,7 @@ interface StreamWrapperIface
 	 * @param string $path
 	 * @return boolean TRUE on success or FALSE on failure
 	 */
-	static function unlink ( $path );
+	function unlink ( $path );
 
 	/**
 	 * This method is called in response to rename() calls on URL paths associated with the wrapper.
@@ -157,7 +157,7 @@ interface StreamWrapperIface
 	 * @param string $path_to
 	 * @return boolean TRUE on success or FALSE on failure
 	 */
-	static function rename ( $path_from, $path_to );
+	function rename ( $path_from, $path_to );
 
 	/**
 	 * This method is called in response to mkdir() calls on URL paths associated with the wrapper.
@@ -170,7 +170,7 @@ interface StreamWrapperIface
 	 * @param int $options Posible values include STREAM_REPORT_ERRORS and STREAM_MKDIR_RECURSIVE
 	 * @return boolean TRUE on success or FALSE on failure
 	 */
-	static function mkdir ( $path, $mode, $options );
+	function mkdir ( $path, $mode, $options );
 
 	/**
 	 * This method is called in response to rmdir() calls on URL paths associated with the wrapper.
@@ -182,7 +182,7 @@ interface StreamWrapperIface
 	 * @param int $options Possible values include STREAM_REPORT_ERRORS.
 	 * @return boolean TRUE on success or FALSE on failure.
 	 */
-	static function rmdir ( $path, $options );
+	function rmdir ( $path, $options );
 
 	/**
 	 * This method is called immediately when your stream object is created for examining directory contents with opendir().
@@ -218,7 +218,7 @@ interface StreamWrapperIface
 	 *                          stat triggers it's own warning anyway, so it makes no sense to trigger one by our stream-wrapper!
 	 * @return array
 	 */
-	static function url_stat ( $path, $flags );
+	function url_stat ( $path, $flags );
 
 	/**
 	 * This method is called in response to readdir().