Merge branch 'master' into share_api

Conflicts:
	apps/calendar/js/loader.js
	apps/contacts/index.php
	apps/contacts/js/loader.js
	apps/files/js/files.js
	apps/files_sharing/sharedstorage.php
	lib/filesystemview.php

59 files changed, 1803 insertions, 1034 deletions

diff --git a/lib/MDB2/Driver/sqlite3.php b/lib/MDB2/Driver/sqlite3.php
index 25927aff637..6bfccadad9a 100644
--- a/lib/MDB2/Driver/sqlite3.php
+++ b/lib/MDB2/Driver/sqlite3.php
@@ -1221,7 +1221,7 @@ class MDB2_Statement_sqlite3 extends MDB2_Statement_Common
             return $affected_rows;
         }
 
-        $result =& $this->db->_wrapResult($result, $this->result_types,
+        $result = $this->db->_wrapResult($result, $this->result_types,
             $result_class, $result_wrap_class, $this->limit, $this->offset);
         $this->db->debug($this->query, 'execute', array('is_manip' => $this->is_manip, 'when' => 'post', 'result' => $result));
         return $result;
diff --git a/lib/app.php b/lib/app.php
index 4c2c43ec26b..56132c08671 100755
--- a/lib/app.php
+++ b/lib/app.php
@@ -27,7 +27,6 @@
  * upgrading and removing apps.
  */
 class OC_App{
-	static private $init = false;
 	static private $activeapp = '';
 	static private $navigation = array();
 	static private $settingsForms = array();
@@ -196,7 +195,7 @@ class OC_App{
 			// check if the app is compatible with this version of ownCloud
 			$info=OC_App::getAppInfo($app);
 			$version=OC_Util::getVersion();
-	                if(!isset($info['require']) or ($version[0]>$info['require'])){
+			if(!isset($info['require']) or ($version[0]>$info['require'])){
 				OC_Log::write('core','App "'.$info['name'].'" can\'t be installed because it is not compatible with this version of ownCloud',OC_Log::ERROR);
 				return false;
 			}else{
@@ -332,8 +331,8 @@ class OC_App{
 	}
 
 	/**
-	* Get the path where to install apps
-  */
+	 * Get the path where to install apps
+	 */
 	public static function getInstallPath() {
 		if(OC_Config::getValue('appstoreenabled', true)==false) {
 			return false;
@@ -608,7 +607,7 @@ class OC_App{
 		//set remote/public handelers
 		$appData=self::getAppInfo($appid);
 		foreach($appData['remote'] as $name=>$path){
-			OCP\CONFIG::setAppValue('core', 'remote_'.$name, $path);
+			OCP\CONFIG::setAppValue('core', 'remote_'.$name, $appid.'/'.$path);
 		}
 		foreach($appData['public'] as $name=>$path){
 			OCP\CONFIG::setAppValue('core', 'public_'.$name, $appid.'/'.$path);
diff --git a/lib/archive/zip.php b/lib/archive/zip.php
index 6631a649b16..b2d6674d639 100644
--- a/lib/archive/zip.php
+++ b/lib/archive/zip.php
@@ -11,7 +11,6 @@ class OC_Archive_ZIP extends OC_Archive{
 	 * @var ZipArchive zip
 	 */
 	private $zip=null;
-	private $success=false;
 	private $path;
 	
 	function __construct($source){
@@ -74,8 +73,7 @@ class OC_Archive_ZIP extends OC_Archive{
 	 * @return int
 	 */
 	function mtime($path){
-		$stat=$this->zip->statName($path);
-		return $stat['mtime'];
+		return filemtime($this->path);
 	}
 	/**
 	 * get the files in a folder
diff --git a/lib/base.php b/lib/base.php
index fe69ad70c0f..888dc265d64 100644
--- a/lib/base.php
+++ b/lib/base.php
@@ -83,6 +83,9 @@ class OC{
 		elseif(strpos($className,'OCP\\')===0){
 			require_once 'public/'.strtolower(str_replace('\\','/',substr($className,3)) . '.php');
 		}
+		elseif(strpos($className,'OCA\\')===0){
+			require_once 'apps/'.strtolower(str_replace('\\','/',substr($className,3)) . '.php');
+		}
 		elseif(strpos($className,'Sabre_')===0) {
 			require_once str_replace('_','/',$className) . '.php';
 		}
@@ -345,7 +348,7 @@ class OC{
 			$_SESSION['user_id'] = '';
 		}
 
-		OC_User::useBackend( OC_Config::getValue( "userbackend", "database" ));
+		OC_User::useBackend(new OC_User_Database());
 		OC_Group::useBackend(new OC_Group_Database());
 
 		// Load Apps
diff --git a/lib/cache.php b/lib/cache.php
index 1f269174fad..55f189a5da8 100644
--- a/lib/cache.php
+++ b/lib/cache.php
@@ -7,48 +7,96 @@
  */
 
 class OC_Cache {
+	/**
+	 * @var OC_Cache $user_cache
+	 */
 	static protected $user_cache;
+	/**
+	 * @var OC_Cache $global_cache
+	 */
 	static protected $global_cache;
+	/**
+	 * @var OC_Cache $global_cache_fast
+	 */
+	static protected $global_cache_fast;
+	/**
+	 * @var OC_Cache $user_cache_fast
+	 */
+	static protected $user_cache_fast;
+	static protected $isFast=null;
 
-	static public function getGlobalCache() {
+	/**
+	 * get the global cache
+	 * @return OC_Cache
+	 */
+	static public function getGlobalCache($fast=false) {
 		if (!self::$global_cache) {
-			$fast_cache = null;
-			if (!$fast_cache && function_exists('xcache_set')) {
-				$fast_cache = new OC_Cache_XCache(true);
+			self::$global_cache_fast = null;
+			if (!self::$global_cache_fast && function_exists('xcache_set')) {
+				self::$global_cache_fast = new OC_Cache_XCache(true);
 			}
-			if (!$fast_cache && function_exists('apc_store')) {
-				$fast_cache = new OC_Cache_APC(true);
+			if (!self::$global_cache_fast && function_exists('apc_store')) {
+				self::$global_cache_fast = new OC_Cache_APC(true);
 			}
+			
 			self::$global_cache = new OC_Cache_FileGlobal();
-			if ($fast_cache) {
-				self::$global_cache = new OC_Cache_Broker($fast_cache, self::$global_cache);
+			if (self::$global_cache_fast) {
+				self::$global_cache = new OC_Cache_Broker(self::$global_cache_fast, self::$global_cache);
+			}
+		}
+		if($fast){
+			if(self::$global_cache_fast){
+				return self::$global_cache_fast;
+			}else{
+				return false;
 			}
 		}
 		return self::$global_cache;
 	}
 
-	static public function getUserCache() {
+	/**
+	 * get the user cache
+	 * @return OC_Cache
+	 */
+	static public function getUserCache($fast=false) {
 		if (!self::$user_cache) {
-			$fast_cache = null;
-			if (!$fast_cache && function_exists('xcache_set')) {
-				$fast_cache = new OC_Cache_XCache();
+			self::$user_cache_fast = null;
+			if (!self::$user_cache_fast && function_exists('xcache_set')) {
+				self::$user_cache_fast = new OC_Cache_XCache();
 			}
-			if (!$fast_cache && function_exists('apc_store')) {
-				$fast_cache = new OC_Cache_APC();
+			if (!self::$user_cache_fast && function_exists('apc_store')) {
+				self::$user_cache_fast = new OC_Cache_APC();
 			}
+			
 			self::$user_cache = new OC_Cache_File();
-			if ($fast_cache) {
-				self::$user_cache = new OC_Cache_Broker($fast_cache, self::$user_cache);
+			if (self::$user_cache_fast) {
+				self::$user_cache = new OC_Cache_Broker(self::$user_cache_fast, self::$user_cache);
+			}
+		}
+
+		if($fast){
+			if(self::$user_cache_fast){
+				return self::$user_cache_fast;
+			}else{
+				return false;
 			}
 		}
 		return self::$user_cache;
 	}
 
+	/**
+	 * get a value from the user cache
+	 * @return mixed
+	 */
 	static public function get($key) {
 		$user_cache = self::getUserCache();
 		return $user_cache->get($key);
 	}
 
+	/**
+	 * set a value in the user cache
+	 * @return bool
+	 */
 	static public function set($key, $value, $ttl=0) {
 		if (empty($key)) {
 			return false;
@@ -57,19 +105,43 @@ class OC_Cache {
 		return $user_cache->set($key, $value, $ttl);
 	}
 
+	/**
+	 * check if a value is set in the user cache
+	 * @return bool
+	 */
 	static public function hasKey($key) {
 		$user_cache = self::getUserCache();
 		return $user_cache->hasKey($key);
 	}
 
+	/**
+	 * remove an item from the user cache
+	 * @return bool
+	 */
 	static public function remove($key) {
 		$user_cache = self::getUserCache();
 		return $user_cache->remove($key);
 	}
 
-	static public function clear() {
+	/**
+	 * clear the user cache of all entries starting with a prefix
+	 * @param string prefix (optional)
+	 * @return bool
+	 */
+	static public function clear($prefix='') {
 		$user_cache = self::getUserCache();
-		return $user_cache->clear();
+		return $user_cache->clear($prefix);
+	}
+
+	/**
+	 * check if a fast memory based cache is available
+	 * @return true
+	 */
+	static public function isFast() {
+		if(is_null(self::$isFast)){
+			self::$isFast=function_exists('xcache_set') || function_exists('apc_store');
+		}
+		return self::$isFast;
 	}
 
 }
diff --git a/lib/cache/apc.php b/lib/cache/apc.php
index 6cf47d0c158..c192fe2f196 100644
--- a/lib/cache/apc.php
+++ b/lib/cache/apc.php
@@ -43,14 +43,15 @@ class OC_Cache_APC {
 		return apc_delete($this->getNamespace().$key);
 	}
 
-	public function clear(){
-		$ns = $this->getNamespace();
+	public function clear($prefix=''){
+		$ns = $this->getNamespace().$prefix;
 		$cache = apc_cache_info('user');
 		foreach($cache['cache_list'] as $entry) {
 			if (strpos($entry['info'], $ns) === 0) {
 				apc_delete($entry['info']);
 			}
 		}
+		return true;
 	}
 }
 if(!function_exists('apc_exists')) {
diff --git a/lib/cache/broker.php b/lib/cache/broker.php
index 931d0dd407e..c2aceabaf53 100644
--- a/lib/cache/broker.php
+++ b/lib/cache/broker.php
@@ -46,8 +46,8 @@ class OC_Cache_Broker {
 		return $this->slow_cache->remove($key);
 	}
 
-	public function clear(){
-		$this->fast_cache->clear();
-		$this->slow_cache->clear();
+	public function clear($prefix=''){
+		$this->fast_cache->clear($prefix);
+		$this->slow_cache->clear($prefix);
 	}
 }
diff --git a/lib/cache/file.php b/lib/cache/file.php
index 0b7d3e30508..562c3d17167 100644
--- a/lib/cache/file.php
+++ b/lib/cache/file.php
@@ -62,15 +62,16 @@ class OC_Cache_File{
 		return $storage->unlink($key);
 	}
 
-	public function clear(){
+	public function clear($prefix=''){
 		$storage = $this->getStorage();
 		if($storage and $storage->is_dir('/')){
 			$dh=$storage->opendir('/');
 			while($file=readdir($dh)){
-				if($file!='.' and $file!='..'){
+				if($file!='.' and $file!='..' and ($prefix==='' || strpos($file, $prefix) === 0)){
 					$storage->unlink('/'.$file);
 				}
 			}
 		}
+		return true;
 	}
 }
diff --git a/lib/cache/xcache.php b/lib/cache/xcache.php
index bd55cee8f6b..951f9b47545 100644
--- a/lib/cache/xcache.php
+++ b/lib/cache/xcache.php
@@ -43,7 +43,8 @@ class OC_Cache_XCache {
 		return xcache_unset($this->getNamespace().$key);
 	}
 
-	public function clear(){
-		return xcache_unset_by_prefix($this->getNamespace());
+	public function clear($prefix=''){
+		xcache_unset_by_prefix($this->getNamespace().$prefix);
+		return true;
 	}
 }
diff --git a/lib/connector/sabre/auth.php b/lib/connector/sabre/auth.php
index ee680391626..99f696e3a07 100644
--- a/lib/connector/sabre/auth.php
+++ b/lib/connector/sabre/auth.php
@@ -31,13 +31,18 @@ class OC_Connector_Sabre_Auth extends Sabre_DAV_Auth_Backend_AbstractBasic {
 	 * @return bool
 	 */
 	protected function validateUserPass($username, $password){
-		OC_Util::setUpFS();//login hooks may need early access to the filesystem
-		if(OC_User::login($username,$password)){
-			OC_Util::setUpFS($username);
+		if (OC_User::isLoggedIn()) {
+			OC_Util::setupFS($username);
 			return true;
-		}
-		else{
-			return false;
+		} else {
+			OC_Util::setUpFS();//login hooks may need early access to the filesystem
+			if(OC_User::login($username,$password)){
+				OC_Util::setUpFS($username);
+				return true;
+			}
+			else{
+				return false;
+			}
 		}
 	}
 } 
diff --git a/lib/connector/sabre/client.php b/lib/connector/sabre/client.php
index 87f9d59b3ae..7e8f21264f9 100644
--- a/lib/connector/sabre/client.php
+++ b/lib/connector/sabre/client.php
@@ -68,18 +68,13 @@ class OC_Connector_Sabre_Client extends Sabre_DAV_Client {
 				// Automatically follow redirects

 				CURLOPT_FOLLOWLOCATION => true,

 				CURLOPT_MAXREDIRS => 5,

-				CURLOPT_SSL_VERIFYPEER => true,

-				//CURLOPT_SSL_VERIFYPEER	=> false,

 		);

-		

+	

 		if($this->trustedCertificates) {

 			$curlSettings[CURLOPT_CAINFO] = $this->trustedCertificates;

 		}

-	

+		

 		switch ($method) {

-			case 'PUT':

-				$curlSettings[CURLOPT_PUT] = true;

-				break;

 			case 'HEAD' :

 	

 				// do not read body with HEAD requests (this is neccessary because cURL does not ignore the body with HEAD

@@ -110,8 +105,15 @@ class OC_Connector_Sabre_Client extends Sabre_DAV_Client {
 			$curlSettings[CURLOPT_PROXY] = $this->proxy;

 		}

 	

-		if ($this->userName) {

-			$curlSettings[CURLOPT_HTTPAUTH] = CURLAUTH_BASIC | CURLAUTH_DIGEST;

+		if ($this->userName && $this->authType) {

+			$curlType = 0;

+			if ($this->authType & self::AUTH_BASIC) {

+				$curlType |= CURLAUTH_BASIC;

+			}

+			if ($this->authType & self::AUTH_DIGEST) {

+				$curlType |= CURLAUTH_DIGEST;

+			}

+			$curlSettings[CURLOPT_HTTPAUTH] = $curlType;

 			$curlSettings[CURLOPT_USERPWD] = $this->userName . ':' . $this->password;

 		}

 	

@@ -167,5 +169,5 @@ class OC_Connector_Sabre_Client extends Sabre_DAV_Client {
 	

 		return $response;

 	

-	}

+	}	

 }
\ No newline at end of file
diff --git a/lib/connector/sabre/directory.php b/lib/connector/sabre/directory.php
index b75bb5c50f5..0842fc4fc65 100644
--- a/lib/connector/sabre/directory.php
+++ b/lib/connector/sabre/directory.php
@@ -26,17 +26,33 @@ class OC_Connector_Sabre_Directory extends OC_Connector_Sabre_Node implements Sa
 	/**
 	 * Creates a new file in the directory
 	 *
-	 * data is a readable stream resource
+	 * Data will either be supplied as a stream resource, or in certain cases
+	 * as a string. Keep in mind that you may have to support either.
+	 *
+	 * After succesful creation of the file, you may choose to return the ETag
+	 * of the new file here.
+	 *
+	 * The returned ETag must be surrounded by double-quotes (The quotes should
+	 * be part of the actual string).
+	 *
+	 * If you cannot accurately determine the ETag, you should not return it.
+	 * If you don't store the file exactly as-is (you're transforming it
+	 * somehow) you should also not return an ETag.
+	 *
+	 * This means that if a subsequent GET to this new file does not exactly
+	 * return the same contents of what was submitted here, you are strongly
+	 * recommended to omit the ETag.
 	 *
 	 * @param string $name Name of the file
-	 * @param resource $data Initial payload
-	 * @return void
+	 * @param resource|string $data Initial payload
+	 * @return null|string
 	 */
 	public function createFile($name, $data = null) {
 
 		$newPath = $this->path . '/' . $name;
 		OC_Filesystem::file_put_contents($newPath,$data);
 
+		return OC_Connector_Sabre_Node::getETagPropertyForFile($newPath);
 	}
 
 	/**
@@ -146,7 +162,7 @@ class OC_Connector_Sabre_Directory extends OC_Connector_Sabre_Node implements Sa
 	 * @return array
 	 */
 	public function getQuotaInfo() {
-		$rootInfo=OC_FileCache::get('');
+		$rootInfo=OC_FileCache_Cached::get('');
 		return array(
 			$rootInfo['size'],
 			OC_Filesystem::free_space()
diff --git a/lib/connector/sabre/file.php b/lib/connector/sabre/file.php
index e4dc8c93445..80f0a0ab4d8 100644
--- a/lib/connector/sabre/file.php
+++ b/lib/connector/sabre/file.php
@@ -26,13 +26,28 @@ class OC_Connector_Sabre_File extends OC_Connector_Sabre_Node implements Sabre_D
 	/**
 	 * Updates the data
 	 *
+	 * The data argument is a readable stream resource.
+	 *
+	 * After a succesful put operation, you may choose to return an ETag. The
+	 * etag must always be surrounded by double-quotes. These quotes must
+	 * appear in the actual string you're returning.
+	 *
+	 * Clients may use the ETag from a PUT request to later on make sure that
+	 * when they update the file, the contents haven't changed in the mean
+	 * time.
+	 *
+	 * If you don't plan to store the file byte-by-byte, and you return a
+	 * different object on a subsequent GET you are strongly recommended to not
+	 * return an ETag, and just return null.
+	 *
 	 * @param resource $data
-	 * @return void
+	 * @return string|null
 	 */
 	public function put($data) {
 
 		OC_Filesystem::file_put_contents($this->path,$data);
 
+		return OC_Connector_Sabre_Node::getETagPropertyForFile($this->path);
 	}
 
 	/**
@@ -42,7 +57,7 @@ class OC_Connector_Sabre_File extends OC_Connector_Sabre_Node implements Sabre_D
 	 */
 	public function get() {
 
-		return OC_Filesystem::readfile($this->path);
+		return OC_Filesystem::fopen($this->path,'rb');
 
 	}
 
@@ -79,9 +94,11 @@ class OC_Connector_Sabre_File extends OC_Connector_Sabre_Node implements Sabre_D
 	 * @return mixed
 	 */
 	public function getETag() {
-
-		return null;
-
+		$properties = $this->getProperties(array(self::GETETAG_PROPERTYNAME));
+		if (isset($properties[self::GETETAG_PROPERTYNAME])) {
+			return $properties[self::GETETAG_PROPERTYNAME];
+		}
+		return $this->getETagPropertyForFile($this->path);
 	}
 
 	/**
diff --git a/lib/connector/sabre/locks.php b/lib/connector/sabre/locks.php
index 94382e68a1a..e95dcf02d27 100644
--- a/lib/connector/sabre/locks.php
+++ b/lib/connector/sabre/locks.php
@@ -108,7 +108,7 @@ class OC_Connector_Sabre_Locks extends Sabre_DAV_Locks_Backend_Abstract {
 
 		$locks = $this->getLocks($uri,false);
 		$exists = false;
-		foreach($locks as $k=>$lock) {
+		foreach($locks as $lock) {
 			if ($lock->token == $lockInfo->token) $exists = true;
 		}
 	
diff --git a/lib/connector/sabre/node.php b/lib/connector/sabre/node.php
index be315a0ffd9..663970487fb 100644
--- a/lib/connector/sabre/node.php
+++ b/lib/connector/sabre/node.php
@@ -22,6 +22,7 @@
  */
 
 abstract class OC_Connector_Sabre_Node implements Sabre_DAV_INode, Sabre_DAV_IProperties {
+	const GETETAG_PROPERTYNAME = '{DAV:}getetag';
 
 	/**
 	 * The path to the current node
@@ -141,6 +142,7 @@ abstract class OC_Connector_Sabre_Node implements Sabre_DAV_INode, Sabre_DAV_IPr
 	public function updateProperties($properties) {
 		$existing = $this->getProperties(array());
 		foreach($properties as $propertyName => $propertyValue) {
+			$propertyName = preg_replace("/^{.*}/", "", $propertyName); // remove leading namespace from property name
 			// If it was null, we need to delete the property
 			if (is_null($propertyValue)) {
 				if(array_key_exists( $propertyName, $existing )){
@@ -178,7 +180,7 @@ abstract class OC_Connector_Sabre_Node implements Sabre_DAV_INode, Sabre_DAV_IPr
 	 * @param array $properties
 	 * @return void
 	 */
-	function getProperties($properties) {
+	public function getProperties($properties) {
 		if (is_null($this->property_cache)) {
 			$query = OC_DB::prepare( 'SELECT * FROM *PREFIX*properties WHERE userid = ? AND propertypath = ?' );
 			$result = $query->execute( array( OC_User::getUser(), $this->path ));
@@ -200,4 +202,29 @@ abstract class OC_Connector_Sabre_Node implements Sabre_DAV_INode, Sabre_DAV_IPr
 		}
 		return $props;
 	}
+
+	/**
+	 * Returns the ETag surrounded by double-quotes for this path.
+	 * @param string $path Path of the file
+	 * @return string|null Returns null if the ETag can not effectively be determined
+	 */
+	static public function getETagPropertyForFile($path) {
+		$tag = OC_Filesystem::hash('md5', $path);
+		if (empty($tag)) {
+			return null;
+		}
+		$etag = '"'.$tag.'"';
+		$query = OC_DB::prepare( 'INSERT INTO *PREFIX*properties (userid,propertypath,propertyname,propertyvalue) VALUES(?,?,?,?)' );
+		$query->execute( array( OC_User::getUser(), $path, self::GETETAG_PROPERTYNAME, $etag ));
+		return $etag;
+	}
+
+	/**
+	 * Remove the ETag from the cache.
+	 * @param string $path Path of the file
+	 */
+	static public function removeETagPropertyForFile($path) {
+		$query = OC_DB::prepare( 'DELETE FROM *PREFIX*properties WHERE userid = ? AND propertypath = ? AND propertyname = ?' );
+		$query->execute( array( OC_User::getUser(), $path, self::GETETAG_PROPERTYNAME ));
+	}
 }
diff --git a/lib/db.php b/lib/db.php
index 2a06d72ea32..6971fe4a583 100644
--- a/lib/db.php
+++ b/lib/db.php
@@ -33,8 +33,6 @@ class OC_DB {
 	static private $MDB2=false;
 	static private $PDO=false;
 	static private $schema=false;
-	static private $affected=0;
-	static private $result=false;
 	static private $inTransaction=false;
 	static private $prefix=null;
 	static private $type=null;
@@ -222,7 +220,7 @@ class OC_DB {
 				echo( '<b>can not connect to database, using '.$type.'. ('.self::$MDB2->getUserInfo().')</center>');
 				OC_Log::write('core',self::$MDB2->getUserInfo(),OC_Log::FATAL);
 				OC_Log::write('core',self::$MDB2->getMessage(),OC_Log::FATAL);
-				die( $error );
+				die();
 			}
 			
 			// We always, really always want associative arrays
@@ -370,9 +368,6 @@ class OC_DB {
 		if( $definition instanceof MDB2_Schema_Error ){
 			die( $definition->getMessage().': '.$definition->getUserInfo());
 		}
-// 		if(OC_Config::getValue('dbtype','sqlite')=='sqlite'){
-// 			$definition['overwrite']=true;//always overwrite for sqlite
-// 		}
 		$ret=self::$schema->createDatabase( $definition );
 
 		// Die in case something went wrong
@@ -519,8 +514,9 @@ class OC_DB {
 		
 		// Delete our temporary file
 		unlink( $file2 );
-		foreach($definition['tables'] as $name=>$table){
-			self::dropTable($name);
+		$tables=array_keys($definition['tables']);
+		foreach($tables as $table){
+			self::dropTable($table);
 		}
 	}
 	
@@ -528,8 +524,7 @@ class OC_DB {
 	 * @brief replaces the owncloud tables with a new set
 	 * @param $file string path to the MDB2 xml db export file
 	 */
-	 public static function replaceDB( $file ){
-	 	
+	public static function replaceDB( $file ){
 	 	$apps = OC_App::getAllApps();
 	 	self::beginTransaction();
 	 	// Delete the old tables
diff --git a/lib/eventsource.php b/lib/eventsource.php
index cf10660b94c..95af2e471bc 100644
--- a/lib/eventsource.php
+++ b/lib/eventsource.php
@@ -36,12 +36,15 @@ class OC_EventSource{
 		header('Cache-Control: no-cache');
 		$this->fallback=isset($_GET['fallback']) and $_GET['fallback']=='true';
 		if($this->fallback){
-			$fallBackId=$_GET['fallback_id'];
+			$this->fallBackId=$_GET['fallback_id'];
 			header("Content-Type: text/html");
 			echo str_repeat('<span></span>'.PHP_EOL,10); //dummy data to keep IE happy
 		}else{
 			header("Content-Type: text/event-stream");
 		}
+		if( !OC_Util::isCallRegistered()){
+			exit();
+		}
 		flush();
 
 	}
diff --git a/lib/exception.php b/lib/exception.php
new file mode 100644
index 00000000000..db516fc12d2
--- /dev/null
+++ b/lib/exception.php
@@ -0,0 +1,93 @@
+<?php
+/**
+ * ownCloud
+ *
+ * @author Georg Ehrke
+ * @copyright 2012 georg@owncloud.com
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+class OC_Exception extends Exception{
+	
+	function __construct($message = null, $code = 0, $file = null, $line = null){
+		parent::__construct($message, $code);
+		if(!is_null($file)){
+			$this->file = $file;
+		}
+		if(!is_null($line)){
+			$this->line = $line;
+		}
+		$this->writelog();
+	}
+	
+	private function writelog(){
+		@OC_Log::write(OC_App::getCurrentApp(), $this->getMessage() . '-' . $this->getFile() . '-' . $this->getLine(), OC_Log::FATAL);
+	}
+	
+	private function generatesysinfo(){
+		return array('phpversion' => PHP_VERSION,
+					 'os' => php_uname('s'),
+					 'osrelease' => php_uname('r'),
+					 'osarchitecture' => php_uname('m'),
+					 'phpserverinterface' => php_sapi_name(),
+					 'serverprotocol' => $_SERVER['SERVER_PROTOCOL'],
+					 'requestmethod' => $_SERVER['REQUEST_METHOD'],
+					 'https' => ($_SERVER['HTTPS']==''?'false':'true'),
+					 'database'=>(@OC_Config::getValue('dbtype')!=''?@OC_Config::getValue('dbtype'):'')
+					);
+	}
+	
+	function __toString(){
+		$tmpl = new OC_Template('core', 'exception', 'guest');
+		$tmpl->assign('showsysinfo', true);
+		$tmpl->assign('message', $this->getMessage());
+		$tmpl->assign('code', $this->getCode());
+		$tmpl->assign('file', $this->getFile());
+		$tmpl->assign('line', $this->getLine());
+		$tmpl->assign('sysinfo', $this->generatesysinfo());
+		$tmpl->printPage();
+	}
+}
+
+function oc_exceptionhandler($exception){
+	switch($exception->getCode()){
+		case E_NOTICE:
+		case E_DEPRECATED:
+		case E_USER_NOTICE:
+		case E_USER_DEPRECATED:
+			break;
+		default:
+			throw new OC_Exception($exception->getMessage(), $exception->getCode(), $exception->getFile(), $exception->getLine());
+			break;
+	}
+	return true;
+}
+
+function oc_errorhandler($errno , $errstr , $errfile , $errline){
+	switch($errno){
+		case E_NOTICE:
+		case E_DEPRECATED:
+		case E_USER_NOTICE:
+		case E_USER_DEPRECATED:
+			break;
+		default:
+			throw new OC_Exception($errstr, $errno, $errfile, $errline);
+			break;	
+	}
+	return true;
+}
+set_exception_handler('oc_exceptionhandler');
+set_error_handler('oc_errorhandler');
+error_reporting(E_ERROR | E_WARNING | E_PARSE);
\ No newline at end of file
diff --git a/lib/filecache.php b/lib/filecache.php
index b6f4d23986b..8211637d141 100644
--- a/lib/filecache.php
+++ b/lib/filecache.php
@@ -98,6 +98,10 @@ class OC_FileCache{
 		if(OC_DB::isError($result)){
 			OC_Log::write('files','error while writing file('.$path.') to cache',OC_Log::ERROR);
 		}
+
+		if($cache=OC_Cache::getUserCache(true)){
+			$cache->remove('fileid/'.$path);//ensure we don't have -1 cached
+		}
 	}
 
 	/**
@@ -126,7 +130,7 @@ class OC_FileCache{
 		$query=OC_DB::prepare($sql);
 		$result=$query->execute($arguments);
 		if(OC_DB::isError($result)){
-			OC_Log::write('files','error while updating file('.$path.') in cache',OC_Log::ERROR);
+			OC_Log::write('files','error while updating file('.$id.') in cache',OC_Log::ERROR);
 		}
 	}
 
@@ -146,6 +150,11 @@ class OC_FileCache{
 		$query=OC_DB::prepare('UPDATE *PREFIX*fscache SET parent=? ,name=?, path=?, path_hash=? WHERE path_hash=?');
 		$query->execute(array($newParent,basename($newPath),$newPath,md5($newPath),md5($oldPath)));
 
+		if(($cache=OC_Cache::getUserCache(true)) && $cache->hasKey('fileid/'.$oldPath)){
+			$cache->set('fileid/'.$newPath,$cache->get('fileid/'.$oldPath));
+			$cache->remove('fileid/'.$oldPath);
+		}
+
 		$query=OC_DB::prepare('SELECT path FROM *PREFIX*fscache WHERE path LIKE ?');
 		$oldLength=strlen($oldPath);
 		$updateQuery=OC_DB::prepare('UPDATE *PREFIX*fscache SET path=?, path_hash=? WHERE path_hash=?');
@@ -153,6 +162,11 @@ class OC_FileCache{
 			$old=$row['path'];
 			$new=$newPath.substr($old,$oldLength);
 			$updateQuery->execute(array($new,md5($new),md5($old)));
+
+			if(($cache=OC_Cache::getUserCache(true)) && $cache->hasKey('fileid/'.$old)){
+				$cache->set('fileid/'.$new,$cache->get('fileid/'.$old));
+				$cache->remove('fileid/'.$old);
+			}
 		}
 	}
 
@@ -171,6 +185,8 @@ class OC_FileCache{
 		//delete everything inside the folder
 		$query=OC_DB::prepare('DELETE FROM *PREFIX*fscache WHERE path LIKE ?');
 		$query->execute(array($root.$path.'/%'));
+
+		OC_Cache::remove('fileid/'.$root.$path);
 	}
 	
 	/**
@@ -245,9 +261,14 @@ class OC_FileCache{
 		if($root===false){
 			$root=OC_Filesystem::getRoot();
 		}
+
+		$fullPath=$root.$path;
+		if(($cache=OC_Cache::getUserCache(true)) && $cache->hasKey('fileid/'.$fullPath)){
+			return $cache->get('fileid/'.$fullPath);
+		}
 		
 		$query=OC_DB::prepare('SELECT id FROM *PREFIX*fscache WHERE path_hash=?');
-		$result=$query->execute(array(md5($root.$path)));
+		$result=$query->execute(array(md5($fullPath)));
 		if(OC_DB::isError($result)){
 			OC_Log::write('files','error while getting file id of '.$path,OC_Log::ERROR);
 			return -1;
@@ -255,10 +276,15 @@ class OC_FileCache{
 		
 		$result=$result->fetchRow();
 		if(is_array($result)){
-			return $result['id'];
+			$id=$result['id'];
 		}else{
-			return -1;
+			$id=-1;
 		}
+		if($cache=OC_Cache::getUserCache(true)){
+			$cache->set('fileid/'.$fullPath,$id);
+		}
+		
+		return $id;
 	}
 	
 	/**
@@ -303,7 +329,7 @@ class OC_FileCache{
 	 */
 	public static function increaseSize($path,$sizeDiff, $root=false){
 		if($sizeDiff==0) return;
-		$id=self::getId($path,'');
+		$id=self::getId($path,$root);
 		while($id!=-1){//walk up the filetree increasing the size of all parent folders
 			$query=OC_DB::prepare('UPDATE *PREFIX*fscache SET size=size+? WHERE id=?');
 			$query->execute(array($sizeDiff,$id));
diff --git a/lib/filecache/update.php b/lib/filecache/update.php
index dd77f491ca0..93b632acb4e 100644
--- a/lib/filecache/update.php
+++ b/lib/filecache/update.php
@@ -207,7 +207,6 @@ class OC_FileCache_Update{
 
 		$cached=OC_FileCache_Cached::get($oldPath,$root);
 		$oldSize=$cached['size'];
-		$size=$view->filesize($newPath);
 		OC_FileCache::increaseSize(dirname($oldPath),-$oldSize,$root);
 		OC_FileCache::increaseSize(dirname($newPath),$oldSize,$root);
 		OC_FileCache::move($oldPath,$newPath);
diff --git a/lib/filestorage.php b/lib/filestorage.php
index c104fca87fe..5d864b5d7bb 100644
--- a/lib/filestorage.php
+++ b/lib/filestorage.php
@@ -24,7 +24,7 @@
  * Provde a common interface to all different storage options
  */
 abstract class OC_Filestorage{
-	public function __construct($parameters){}
+	abstract public function __construct($parameters);
 	abstract public function mkdir($path);
 	abstract public function rmdir($path);
 	abstract public function opendir($path);
@@ -48,7 +48,7 @@ abstract class OC_Filestorage{
 	abstract public function copy($path1,$path2);
 	abstract public function fopen($path,$mode);
 	abstract public function getMimeType($path);
-	abstract public function hash($type,$path,$raw);
+	abstract public function hash($type,$path,$raw = false);
 	abstract public function free_space($path);
 	abstract public function search($query);
 	abstract public function touch($path, $mtime=null);
diff --git a/lib/filestorage/common.php b/lib/filestorage/common.php
index 633c2fdfc76..00c76796c57 100644
--- a/lib/filestorage/common.php
+++ b/lib/filestorage/common.php
@@ -204,7 +204,7 @@ abstract class OC_Filestorage_Common extends OC_Filestorage {
 		unlink($tmpFile);
 		return $mime;
 	}
-	public function hash($type,$path,$raw){
+	public function hash($type,$path,$raw = false){
 		$tmpFile=$this->getLocalFile();
 		$hash=hash($type,$tmpFile,$raw);
 		unlink($tmpFile);
@@ -229,7 +229,7 @@ abstract class OC_Filestorage_Common extends OC_Filestorage {
 		}
 		$tmpFile=OC_Helper::tmpFile($extension);
 		$target=fopen($tmpFile,'w');
-		$count=OC_Helper::streamCopy($source,$target);
+		OC_Helper::streamCopy($source,$target);
 		return $tmpFile;
 	}
 // 	abstract public function touch($path, $mtime=null);
diff --git a/lib/filestorage/local.php b/lib/filestorage/local.php
index 658e14eaf9d..6be04db96ae 100644
--- a/lib/filestorage/local.php
+++ b/lib/filestorage/local.php
@@ -4,7 +4,6 @@
  */
 class OC_Filestorage_Local extends OC_Filestorage_Common{
 	protected $datadir;
-	private static $mimetypes=null;
 	public function __construct($arguments){
 		$this->datadir=$arguments['datadir'];
 		if(substr($this->datadir,-1)!=='/'){
@@ -41,7 +40,7 @@ class OC_Filestorage_Local extends OC_Filestorage_Common{
 	}
 	public function filesize($path){
 		if($this->is_dir($path)){
-			return $this->getFolderSize($path);
+			return 0;
 		}else{
 			return filesize($this->datadir.$path);
 		}
@@ -157,7 +156,7 @@ class OC_Filestorage_Local extends OC_Filestorage_Common{
 		return $return;
 	}
 
-	public function hash($type,$path,$raw){
+	public function hash($path,$type,$raw=false){
 		return hash_file($type,$this->datadir.$path,$raw);
 	}
 
@@ -187,15 +186,6 @@ class OC_Filestorage_Local extends OC_Filestorage_Common{
 	}
 
 	/**
-	 * @brief get the size of folder and it's content
-	 * @param string $path file path
-	 * @return int size of folder and it's content
-	 */
-	public function getFolderSize($path){
-		return 0;//depricated, use OC_FileCach instead
-	}
-
-	/**
 	 * check if a file or folder has been updated since $time
 	 * @param int $time
 	 * @return bool
diff --git a/lib/filesystem.php b/lib/filesystem.php
index 5dfcaa107b8..e5817a1bc82 100644
--- a/lib/filesystem.php
+++ b/lib/filesystem.php
@@ -46,105 +46,106 @@
 class OC_Filesystem{
 	static private $storages=array();
 	static private $mounts=array();
-	static private $storageTypes=array();
 	public static $loaded=false;
-	private $fakeRoot='';
+	/**
+	 * @var OC_Filestorage $defaultInstance
+	 */
 	static private $defaultInstance;
 
 
-  /**
-   * classname which used for hooks handling
-   * used as signalclass in OC_Hooks::emit()
-   */
-  const CLASSNAME = 'OC_Filesystem';
-
-  /**
-   * signalname emited before file renaming
-   * @param oldpath
-   * @param newpath
-   */
-  const signal_rename = 'rename';
-
-  /**
-   * signal emited after file renaming
-   * @param oldpath
-   * @param newpath
-   */
-  const signal_post_rename = 'post_rename';
-	
-  /**
-   * signal emited before file/dir creation
-   * @param path
-   * @param run changing this flag to false in hook handler will cancel event
-   */
-  const signal_create = 'create';
-
-  /**
-   * signal emited after file/dir creation
-   * @param path
-   * @param run changing this flag to false in hook handler will cancel event
-   */
-  const signal_post_create = 'post_create';
-
-  /**
-   * signal emits before file/dir copy
-   * @param oldpath
-   * @param newpath
-   * @param run changing this flag to false in hook handler will cancel event
-   */
-  const signal_copy = 'copy';
-
-  /**
-   * signal emits after file/dir copy
-   * @param oldpath
-   * @param newpath
-   */
-  const signal_post_copy = 'post_copy';
-
-  /**
-   * signal emits before file/dir save
-   * @param path
-   * @param run changing this flag to false in hook handler will cancel event
-   */
-  const signal_write = 'write';
-
-  /**
-   * signal emits after file/dir save
-   * @param path
-   */
-  const signal_post_write = 'post_write';
-	
-  /**
-   * signal emits when reading file/dir
-   * @param path
-   */
-  const signal_read = 'read';
-
-  /**
-   * signal emits when removing file/dir
-   * @param path
-   */
-  const signal_delete = 'delete';
-
-  /**
-   * parameters definitions for signals
-   */
-  const signal_param_path = 'path';
-  const signal_param_oldpath = 'oldpath';
-  const signal_param_newpath = 'newpath';
-
-  /**
-   * run - changing this flag to false in hook handler will cancel event
-   */
-  const signal_param_run = 'run';
-
-  /**
-	* get the mountpoint of the storage object for a path
-	( note: because a storage is not always mounted inside the fakeroot, the returned mountpoint is relative to the absolute root of the filesystem and doesn't take the chroot into account
-	*
-	* @param string path
-	* @return string
-	*/
+	/**
+	 * classname which used for hooks handling
+	 * used as signalclass in OC_Hooks::emit()
+	 */
+	const CLASSNAME = 'OC_Filesystem';
+
+	/**
+	 * signalname emited before file renaming
+	 * @param oldpath
+	 * @param newpath
+	 */
+	const signal_rename = 'rename';
+
+	/**
+	 * signal emited after file renaming
+	 * @param oldpath
+	 * @param newpath
+	 */
+	const signal_post_rename = 'post_rename';
+
+	/**
+	 * signal emited before file/dir creation
+	 * @param path
+	 * @param run changing this flag to false in hook handler will cancel event
+	 */
+	const signal_create = 'create';
+
+	/**
+	 * signal emited after file/dir creation
+	 * @param path
+	 * @param run changing this flag to false in hook handler will cancel event
+	 */
+	const signal_post_create = 'post_create';
+
+	/**
+	 * signal emits before file/dir copy
+	* @param oldpath
+	 * @param newpath
+	  * @param run changing this flag to false in hook handler will cancel event
+	 */
+	const signal_copy = 'copy';
+
+	/**
+	 * signal emits after file/dir copy
+	 * @param oldpath
+	 * @param newpath
+	 */
+	const signal_post_copy = 'post_copy';
+
+	/**
+	 * signal emits before file/dir save
+	 * @param path
+	 * @param run changing this flag to false in hook handler will cancel event
+	 */
+	const signal_write = 'write';
+
+	/**
+	 * signal emits after file/dir save
+	 * @param path
+	 */
+	const signal_post_write = 'post_write';
+
+	/**
+	 * signal emits when reading file/dir
+	 * @param path
+	 */
+	const signal_read = 'read';
+
+	/**
+	 * signal emits when removing file/dir
+	 * @param path
+	 */
+	const signal_delete = 'delete';
+
+	/**
+	 * parameters definitions for signals
+	 */
+	const signal_param_path = 'path';
+	const signal_param_oldpath = 'oldpath';
+	const signal_param_newpath = 'newpath';
+
+	/**
+	 * run - changing this flag to false in hook handler will cancel event
+	 */
+	const signal_param_run = 'run';
+
+	/**
+	 * get the mountpoint of the storage object for a path
+	 ( note: because a storage is not always mounted inside the fakeroot, the returned mountpoint is relative to the absolute root of the filesystem and doesn't take the chroot into account
+	 *
+	 * @param string path
+	  * @return string
+	 */
 	static public function getMountPoint($path){
 		OC_Hook::emit(self::CLASSNAME,'get_mountpoint',array('path'=>$path));
 		if(!$path){
@@ -155,7 +156,8 @@ class OC_Filesystem{
 		}
 		$path=str_replace('//', '/',$path);
 		$foundMountPoint='';
-		foreach(OC_Filesystem::$mounts as $mountpoint=>$storage){
+		$mountPoints=array_keys(OC_Filesystem::$mounts);
+		foreach($mountPoints as $mountpoint){
 			if($mountpoint==$path){
 				return $mountpoint;
 			}
@@ -260,10 +262,7 @@ class OC_Filesystem{
 	 * tear down the filesystem, removing all storage providers
 	 */
 	static public function tearDown(){
-		foreach(self::$storages as $mountpoint=>$storage){
-			unset(self::$storages[$mountpoint]);
-		}
-		$fakeRoot='';
+		self::$storages=array();
 	}
 	
 	/**
@@ -287,7 +286,7 @@ class OC_Filesystem{
 	* @return bool
 	*/
 	static public function chroot($fakeRoot){
-		return self::$defaultInstance->chroot($path);
+		return self::$defaultInstance->chroot($fakeRoot);
 	}
 
 	/**
@@ -320,22 +319,8 @@ class OC_Filesystem{
 		if(substr($mountpoint,-1)!=='/'){
 			$mountpoint=$mountpoint.'/';
 		}
-		if (self::getView() != null && $mountpoint != '/' && !self::is_dir(basename($mountpoint))) {
-			self::mkdir(basename($mountpoint));
-		}
 		self::$mounts[$mountpoint]=array('class'=>$class,'arguments'=>$arguments);
 	}
-
-	/**
-	 * create all storage backends mounted in the filesystem
-	 */
-	static private function mountAll(){
-		foreach(self::$mounts as $mountPoint=>$mount){
-			if(!isset(self::$storages[$mountPoint])){
-				self::$storages[$mountPoint]=self::createStorage($mount['type'],$mount['arguments']);
-			}
-		}
-	}
 	
 	/**
 	* return the path to a local version of the file
@@ -488,8 +473,8 @@ class OC_Filesystem{
 	static public function getMimeType($path){
 		return self::$defaultInstance->getMimeType($path);
 	}
-	static public function hash($type,$path){
-		return self::$defaultInstance->hash($type,$path);
+	static public function hash($type,$path, $raw = false){
+		return self::$defaultInstance->hash($type,$path, $raw);
 	}
 	
 	static public function free_space($path='/'){
@@ -506,9 +491,17 @@ class OC_Filesystem{
 	 * @return bool
 	 */
 	static public function hasUpdated($path,$time){
-		return self::$defaultInstance->hasUpdated($path);
+		return self::$defaultInstance->hasUpdated($path,$time);
+	}
+
+	static public function removeETagHook($params) {
+		$path=$params['path'];
+		OC_Connector_Sabre_Node::removeETagPropertyForFile($path);
 	}
 }
+OC_Hook::connect('OC_Filesystem','post_write', 'OC_Filesystem','removeETagHook');
+OC_Hook::connect('OC_Filesystem','post_delete','OC_Filesystem','removeETagHook');
+OC_Hook::connect('OC_Filesystem','post_rename','OC_Filesystem','removeETagHook');
 
 OC_Util::setupFS();
 require_once('filecache.php');
diff --git a/lib/filesystemview.php b/lib/filesystemview.php
index 05731299467..af1a578ec6a 100644
--- a/lib/filesystemview.php
+++ b/lib/filesystemview.php
@@ -22,19 +22,19 @@
 
 
 /**
- * Class to provide access to ownCloud filesystem via a "view", and methods for 
- * working with files within that view (e.g. read, write, delete, etc.). Each 
- * view is restricted to a set of directories via a virtual root. The default view 
- * uses the currently logged in user's data directory as root (parts of 
+ * Class to provide access to ownCloud filesystem via a "view", and methods for
+ * working with files within that view (e.g. read, write, delete, etc.). Each
+ * view is restricted to a set of directories via a virtual root. The default view
+ * uses the currently logged in user's data directory as root (parts of
  * OC_Filesystem are merely a wrapper for OC_FilesystemView).
- * 
+ *
  * Apps that need to access files outside of the user data folders (to modify files
  * belonging to a user other than the one currently logged in, for example) should
  * use this class directly rather than using OC_Filesystem, or making use of PHP's
- * built-in file manipulation functions. This will ensure all hooks and proxies 
+ * built-in file manipulation functions. This will ensure all hooks and proxies
  * are triggered correctly.
  *
- * Filesystem functions are not called directly; they are passed to the correct 
+ * Filesystem functions are not called directly; they are passed to the correct
  * OC_Filestorage object
  */
 
@@ -43,11 +43,11 @@ class OC_FilesystemView {
 	private $internal_path_cache=array();
 	private $storage_cache=array();
 
-	public function __construct($root){
+	public function __construct($root) {
 		$this->fakeRoot=$root;
 	}
 
-	public function getAbsolutePath($path){
+	public function getAbsolutePath($path) {
 		if(!$path){
 			$path='/';
 		}
@@ -63,9 +63,9 @@ class OC_FilesystemView {
 	* @param  string  fakeRoot
 	* @return bool
 	*/
-	public function chroot($fakeRoot){
+	public function chroot($fakeRoot) {
 		if(!$fakeRoot==''){
-			if($fakeRoot[0]!=='/'){
+			if($fakeRoot[0]!=='/') {
 				$fakeRoot='/'.$fakeRoot;
 			}
 		}
@@ -76,7 +76,7 @@ class OC_FilesystemView {
 	 * get the fake root
 	 * @return string
 	 */
-	public function getRoot(){
+	public function getRoot() {
 		return $this->fakeRoot;
 	}
 
@@ -85,7 +85,7 @@ class OC_FilesystemView {
 	* @param  string  path
 	* @return bool
 	*/
-	public function getInternalPath($path){
+	public function getInternalPath($path) {
 		if (!isset($this->internal_path_cache[$path])) {
 			$this->internal_path_cache[$path] = OC_Filesystem::getInternalPath($this->getAbsolutePath($path));
 		}
@@ -97,23 +97,23 @@ class OC_FilesystemView {
 	 * @param string path
 	 * @return string
 	 */
-	public function getRelativePath($path){
-		if($this->fakeRoot==''){
+	public function getRelativePath($path) {
+		if($this->fakeRoot=='') {
 			return $path;
 		}
-		if(strpos($path,$this->fakeRoot)!==0){
+		if(strpos($path, $this->fakeRoot)!==0) {
 			return null;
 		}else{
-			return substr($path,strlen($this->fakeRoot));
+			return substr($path, strlen($this->fakeRoot));
 		}
 	}
-	
+
 	/**
 	* get the storage object for a path
 	* @param string path
 	* @return OC_Filestorage
 	*/
-	public function getStorage($path){
+	public function getStorage($path) {
 		if (!isset($this->storage_cache[$path])) {
 			$this->storage_cache[$path] = OC_Filesystem::getStorage($this->getAbsolutePath($path));
 		}
@@ -127,7 +127,7 @@ class OC_FilesystemView {
 	* @param string path
 	* @return string
 	*/
-	public function getMountPoint($path){
+	public function getMountPoint($path) {
 		return OC_Filesystem::getMountPoint($this->getAbsolutePath($path));
 	}
 
@@ -137,55 +137,55 @@ class OC_FilesystemView {
 	* @param string path
 	* @return string
 	*/
-	public function getLocalFile($path){
-		$parent=substr($path,0,strrpos($path,'/'));
-		if(OC_Filesystem::isValidPath($parent) and $storage=$this->getStorage($path)){
+	public function getLocalFile($path) {
+		$parent=substr($path, 0, strrpos($path,'/'));
+		if(OC_Filesystem::isValidPath($parent) and $storage=$this->getStorage($path)) {
 			return $storage->getLocalFile($this->getInternalPath($path));
 		}
 	}
 
 	/**
-	 * the following functions operate with arguments and return values identical 
-	 * to those of their PHP built-in equivalents. Mostly they are merely wrappers 
+	 * the following functions operate with arguments and return values identical
+	 * to those of their PHP built-in equivalents. Mostly they are merely wrappers
 	 * for OC_Filestorage via basicOperation().
 	 */
-	public function mkdir($path){
-		return $this->basicOperation('mkdir',$path,array('create','write'));
+	public function mkdir($path) {
+		return $this->basicOperation('mkdir', $path, array('create', 'write'));
 	}
-	public function rmdir($path){
-		return $this->basicOperation('rmdir',$path,array('delete'));
+	public function rmdir($path) {
+		return $this->basicOperation('rmdir', $path, array('delete'));
 	}
-	public function opendir($path){
-		return $this->basicOperation('opendir',$path,array('read'));
+	public function opendir($path) {
+		return $this->basicOperation('opendir', $path, array('read'));
 	}
-	public function readdir($handle){
+	public function readdir($handle) {
 		$fsLocal= new OC_Filestorage_Local( array( 'datadir' => '/' ) );
 		return $fsLocal->readdir( $handle );
 	}
-	public function is_dir($path){
+	public function is_dir($path) {
 		if($path=='/'){
 			return true;
 		}
-		return $this->basicOperation('is_dir',$path);
+		return $this->basicOperation('is_dir', $path);
 	}
-	public function is_file($path){
+	public function is_file($path) {
 		if($path=='/'){
 			return false;
 		}
-		return $this->basicOperation('is_file',$path);
+		return $this->basicOperation('is_file', $path);
 	}
-	public function stat($path){
-		return $this->basicOperation('stat',$path);
+	public function stat($path) {
+		return $this->basicOperation('stat', $path);
 	}
-	public function filetype($path){
-		return $this->basicOperation('filetype',$path);
+	public function filetype($path) {
+		return $this->basicOperation('filetype', $path);
 	}
-	public function filesize($path){
-		return $this->basicOperation('filesize',$path);
+	public function filesize($path) {
+		return $this->basicOperation('filesize', $path);
 	}
-	public function readfile($path){
+	public function readfile($path) {
 		@ob_end_clean();
-		$handle=$this->fopen($path,'rb');
+		$handle=$this->fopen($path, 'rb');
 		if ($handle) {
 			$chunkSize = 8192;// 8 MB chunks
 			while (!feof($handle)) {
@@ -224,131 +224,204 @@ class OC_FilesystemView {
 	public function isSharable($path) {
 		return $this->basicOperation('isSharable', $path);
 	}
-	public function file_exists($path){
+	public function file_exists($path) {
 		if($path=='/'){
 			return true;
 		}
-		return $this->basicOperation('file_exists',$path);
+		return $this->basicOperation('file_exists', $path);
 	}
-	public function filectime($path){
-		return $this->basicOperation('filectime',$path);
+	public function filectime($path) {
+		return $this->basicOperation('filectime', $path);
 	}
-	public function filemtime($path){
-		return $this->basicOperation('filemtime',$path);
+	public function filemtime($path) {
+		return $this->basicOperation('filemtime', $path);
 	}
-	public function touch($path, $mtime=null){
+	public function touch($path, $mtime=null) {
 		return $this->basicOperation('touch', $path, array('write'), $mtime);
 	}
-	public function file_get_contents($path){
-		return $this->basicOperation('file_get_contents',$path,array('read'));
-	}
-	public function file_put_contents($path,$data){
-		if(is_resource($data)){//not having to deal with streams in file_put_contents makes life easier
-			$exists=$this->file_exists($path);
-			$run=true;
-			if(!$exists){
-				OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_create, array( OC_Filesystem::signal_param_path => $path, OC_Filesystem::signal_param_run => &$run));
+	public function file_get_contents($path) {
+		return $this->basicOperation('file_get_contents', $path, array('read'));
+	}
+	public function file_put_contents($path, $data) {
+		if(is_resource($data)) {//not having to deal with streams in file_put_contents makes life easier
+			$exists = $this->file_exists($path);
+			$run = true;
+			if(!$exists) {
+				OC_Hook::emit(
+					OC_Filesystem::CLASSNAME,
+					OC_Filesystem::signal_create,
+					array(
+						OC_Filesystem::signal_param_path => $path,
+						OC_Filesystem::signal_param_run => &$run
+					)
+				);
 			}
-			OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_write, array( OC_Filesystem::signal_param_path => $path, OC_Filesystem::signal_param_run => &$run));
-			if(!$run){
+			OC_Hook::emit(
+				OC_Filesystem::CLASSNAME,
+				OC_Filesystem::signal_write,
+				array(
+					OC_Filesystem::signal_param_path => $path,
+					OC_Filesystem::signal_param_run => &$run
+				)
+			);
+			if(!$run) {
 				return false;
 			}
-			$target=$this->fopen($path,'w');
-			if($target){
-				$count=OC_Helper::streamCopy($data,$target);
+			$target=$this->fopen($path, 'w');
+			if($target) {
+				$count=OC_Helper::streamCopy($data, $target);
 				fclose($target);
 				fclose($data);
-				if(!$exists){
-					OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_post_create, array( OC_Filesystem::signal_param_path => $path));
+				if(!$exists) {
+					OC_Hook::emit(
+						OC_Filesystem::CLASSNAME,
+						OC_Filesystem::signal_post_create,
+						array( OC_Filesystem::signal_param_path => $path)
+					);
 				}
-				OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_post_write, array( OC_Filesystem::signal_param_path => $path));
-				return $count>0;
+				OC_Hook::emit(
+					OC_Filesystem::CLASSNAME,
+					OC_Filesystem::signal_post_write,
+					array( OC_Filesystem::signal_param_path => $path)
+				);
+				return $count > 0;
 			}else{
 				return false;
 			}
 		}else{
-			return $this->basicOperation('file_put_contents',$path,array('create','write'),$data);
+			return $this->basicOperation('file_put_contents', $path, array('create', 'write'), $data);
 		}
 	}
-	public function unlink($path){
-		return $this->basicOperation('unlink',$path,array('delete'));
+	public function unlink($path) {
+		return $this->basicOperation('unlink', $path, array('delete'));
 	}
 	public function deleteAll( $directory, $empty = false ) {
 		return $this->basicOperation( 'deleteAll', $directory, array('delete'), $empty );
 	}
-	public function rename($path1,$path2){
-		$absolutePath1=$this->getAbsolutePath($path1);
-		$absolutePath2=$this->getAbsolutePath($path2);
-		if(OC_FileProxy::runPreProxies('rename',$absolutePath1,$absolutePath2) and OC_Filesystem::isValidPath($path2)){
-			$path1=$this->getRelativePath($absolutePath1);
-			$path2=$this->getRelativePath($absolutePath2);
-			if($path1==null or $path2==null){
+	public function rename($path1, $path2) {
+		$absolutePath1 = $this->getAbsolutePath($path1);
+		$absolutePath2 = $this->getAbsolutePath($path2);
+		if(OC_FileProxy::runPreProxies('rename', $absolutePath1, $absolutePath2) and OC_Filesystem::isValidPath($path2)) {
+			$path1 = $this->getRelativePath($absolutePath1);
+			$path2 = $this->getRelativePath($absolutePath2);
+			if($path1 == null or $path2 == null) {
 				return false;
 			}
 			$run=true;
-			OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_rename, array( OC_Filesystem::signal_param_oldpath => $path1 , OC_Filesystem::signal_param_newpath=>$path2, OC_Filesystem::signal_param_run => &$run));
-			if($run){
-				$mp1=$this->getMountPoint($path1);
-				$mp2=$this->getMountPoint($path2);
-				if($mp1==$mp2){
-					if($storage=$this->getStorage($path1)){
-						$result=$storage->rename($this->getInternalPath($path1),$this->getInternalPath($path2));
+			OC_Hook::emit(
+				OC_Filesystem::CLASSNAME, OC_Filesystem::signal_rename,
+					array(
+						OC_Filesystem::signal_param_oldpath => $path1,
+						OC_Filesystem::signal_param_newpath => $path2,
+						OC_Filesystem::signal_param_run => &$run
+					)
+			);
+			if($run) {
+				$mp1 = $this->getMountPoint($path1);
+				$mp2 = $this->getMountPoint($path2);
+				if($mp1 == $mp2) {
+					if($storage = $this->getStorage($path1)) {
+						$result = $storage->rename($this->getInternalPath($path1), $this->getInternalPath($path2));
 					}
-				}else{
-					$source=$this->fopen($path1,'r');
-					$target=$this->fopen($path2,'w');
-					$count=OC_Helper::streamCopy($source,$target);
-					$storage1=$this->getStorage($path1);
+				} else {
+					$source = $this->fopen($path1, 'r');
+					$target = $this->fopen($path2, 'w');
+					$count = OC_Helper::streamCopy($source, $target);
+					$storage1 = $this->getStorage($path1);
 					$storage1->unlink($this->getInternalPath($path1));
-					$result=$count>0;
+					$result = $count>0;
 				}
-				OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_post_rename, array( OC_Filesystem::signal_param_oldpath => $path1, OC_Filesystem::signal_param_newpath=>$path2));
+				OC_Hook::emit(
+					OC_Filesystem::CLASSNAME,
+					OC_Filesystem::signal_post_rename,
+					array(
+						OC_Filesystem::signal_param_oldpath => $path1,
+						OC_Filesystem::signal_param_newpath => $path2
+					)
+				);
 				return $result;
 			}
 		}
 	}
-	public function copy($path1,$path2){
-		$absolutePath1=$this->getAbsolutePath($path1);
-		$absolutePath2=$this->getAbsolutePath($path2);
-		if(OC_FileProxy::runPreProxies('copy',$absolutePath1,$absolutePath2) and OC_Filesystem::isValidPath($path2)){
-			$path1=$this->getRelativePath($absolutePath1);
-			$path2=$this->getRelativePath($absolutePath2);
-			if($path1==null or $path2==null){
+	public function copy($path1, $path2) {
+		$absolutePath1 = $this->getAbsolutePath($path1);
+		$absolutePath2 = $this->getAbsolutePath($path2);
+		if(OC_FileProxy::runPreProxies('copy', $absolutePath1, $absolutePath2) and OC_Filesystem::isValidPath($path2)) {
+			$path1 = $this->getRelativePath($absolutePath1);
+			$path2 = $this->getRelativePath($absolutePath2);
+			if($path1 == null or $path2 == null) {
 				return false;
 			}
 			$run=true;
-			OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_copy, array( OC_Filesystem::signal_param_oldpath => $path1 , OC_Filesystem::signal_param_newpath=>$path2, OC_Filesystem::signal_param_run => &$run));
+			OC_Hook::emit(
+				OC_Filesystem::CLASSNAME,
+				OC_Filesystem::signal_copy,
+				array(
+					OC_Filesystem::signal_param_oldpath => $path1,
+					OC_Filesystem::signal_param_newpath=>$path2,
+					OC_Filesystem::signal_param_run => &$run
+				)
+			);
 			$exists=$this->file_exists($path2);
-			if($run and !$exists){
-				OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_create, array( OC_Filesystem::signal_param_path => $path2, OC_Filesystem::signal_param_run => &$run));
+			if($run and !$exists) {
+				OC_Hook::emit(
+					OC_Filesystem::CLASSNAME,
+					OC_Filesystem::signal_create,
+					array(
+						OC_Filesystem::signal_param_path => $path2,
+						OC_Filesystem::signal_param_run => &$run
+					)
+				);
 			}
-			if($run){
-				OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_write, array( OC_Filesystem::signal_param_path => $path2, OC_Filesystem::signal_param_run => &$run));
+			if($run) {
+				OC_Hook::emit(
+					OC_Filesystem::CLASSNAME,
+					OC_Filesystem::signal_write,
+					array(
+						OC_Filesystem::signal_param_path => $path2,
+						OC_Filesystem::signal_param_run => &$run
+					)
+				);
 			}
-			if($run){
+			if($run) {
 				$mp1=$this->getMountPoint($path1);
 				$mp2=$this->getMountPoint($path2);
-				if($mp1==$mp2){
-					if($storage=$this->getStorage($path1)){
-						$result=$storage->copy($this->getInternalPath($path1),$this->getInternalPath($path2));
+				if($mp1 == $mp2){
+					if($storage = $this->getStorage($path1)) {
+						$result=$storage->copy($this->getInternalPath($path1), $this->getInternalPath($path2));
 					}
-				}else{
-					$source=$this->fopen($path1,'r');
-					$target=$this->fopen($path2,'w');
-					$result=OC_Helper::streamCopy($source,$target);
+				} else {
+					$source = $this->fopen($path1, 'r');
+					$target = $this->fopen($path2, 'w');
+					$result = OC_Helper::streamCopy($source, $target);
 				}
-        OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_post_copy, array( OC_Filesystem::signal_param_oldpath => $path1 , OC_Filesystem::signal_param_newpath=>$path2));
-				if(!$exists){
-          OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_post_create, array( OC_Filesystem::signal_param_path => $path2));
+				OC_Hook::emit(
+					OC_Filesystem::CLASSNAME,
+					OC_Filesystem::signal_post_copy,
+					array(
+						OC_Filesystem::signal_param_oldpath => $path1,
+						OC_Filesystem::signal_param_newpath=>$path2
+					)
+				);
+				if(!$exists) {
+					OC_Hook::emit(
+						OC_Filesystem::CLASSNAME,
+						OC_Filesystem::signal_post_create,
+						array(OC_Filesystem::signal_param_path => $path2)
+					);
 				}
-        OC_Hook::emit( OC_Filesystem::CLASSNAME, OC_Filesystem::signal_post_write, array( OC_Filesystem::signal_param_path => $path2));
+				OC_Hook::emit(
+					OC_Filesystem::CLASSNAME,
+					OC_Filesystem::signal_post_write,
+					array( OC_Filesystem::signal_param_path => $path2)
+				);
 				return $result;
 			}
 		}
 	}
-	public function fopen($path,$mode){
+	public function fopen($path, $mode) {
 		$hooks=array();
-		switch($mode){
+		switch($mode) {
 			case 'r':
 			case 'rb':
 				$hooks[]='read';
@@ -376,49 +449,68 @@ class OC_FilesystemView {
 				OC_Log::write('core','invalid mode ('.$mode.') for '.$path,OC_Log::ERROR);
 		}
 
-		return $this->basicOperation('fopen',$path,$hooks,$mode);
+		return $this->basicOperation('fopen', $path, $hooks, $mode);
 	}
-	public function toTmpFile($path){
-		if(OC_Filesystem::isValidPath($path)){
-			$source=$this->fopen($path,'r');
-			if($source){
+	public function toTmpFile($path) {
+		if(OC_Filesystem::isValidPath($path)) {
+			$source = $this->fopen($path, 'r');
+			if($source) {
 				$extension='';
-				$extOffset=strpos($path,'.');
+				$extOffset=strpos($path, '.');
 				if($extOffset !== false) {
-					$extension=substr($path,strrpos($path,'.'));
+					$extension=substr($path, strrpos($path,'.'));
 				}
-				$tmpFile=OC_Helper::tmpFile($extension);
-				file_put_contents($tmpFile,$source);
+				$tmpFile = OC_Helper::tmpFile($extension);
+				file_put_contents($tmpFile, $source);
 				return $tmpFile;
 			}
 		}
 	}
-	public function fromTmpFile($tmpFile,$path){
-		if(OC_Filesystem::isValidPath($path)){
-			if(!$tmpFile){
+	public function fromTmpFile($tmpFile, $path) {
+		if(OC_Filesystem::isValidPath($path)) {
+			if(!$tmpFile) {
 				debug_print_backtrace();
 			}
-			$source=fopen($tmpFile,'r');
-			if($source){
-				$this->file_put_contents($path,$source);
+			$source=fopen($tmpFile, 'r');
+			if($source) {
+				$this->file_put_contents($path, $source);
 				unlink($tmpFile);
 				return true;
-			}else{
+			} else {
 			}
-		}else{
+		} else {
 			return false;
 		}
 	}
 
-	public function getMimeType($path){
-		return $this->basicOperation('getMimeType',$path);
-	}
-	public function hash($type,$path){
-		return $this->basicOperation('hash',$path,array('read'));
+	public function getMimeType($path) {
+		return $this->basicOperation('getMimeType', $path);
+	}
+	public function hash($type, $path, $raw = false) {
+		$absolutePath = $this->getAbsolutePath($path);
+		if (OC_FileProxy::runPreProxies('hash', $absolutePath) && OC_Filesystem::isValidPath($path)) {
+			$path = $this->getRelativePath($absolutePath);
+			if ($path == null) {
+				return false;
+			}
+			if (OC_Filesystem::$loaded && $this->fakeRoot == OC_Filesystem::getRoot()) {
+				OC_Hook::emit(
+					OC_Filesystem::CLASSNAME,
+					OC_Filesystem::signal_read,
+					array( OC_Filesystem::signal_param_path => $path)
+				);
+			}
+			if ($storage = $this->getStorage($path)) {
+				$result = $storage->hash($type, $this->getInternalPath($path), $raw);
+				$result = OC_FileProxy::runPostProxies('hash', $absolutePath, $result);
+				return $result;
+			}
+		}
+		return null;
 	}
 
-	public function free_space($path='/'){
-		return $this->basicOperation('free_space',$path);
+	public function free_space($path='/') {
+		return $this->basicOperation('free_space', $path);
 	}
 
 	/**
@@ -428,41 +520,56 @@ class OC_FilesystemView {
 	 * @param array (optional) hooks
 	 * @param mixed (optional) $extraParam
 	 * @return mixed
-	 * 
-	 * This method takes requests for basic filesystem functions (e.g. reading & writing 
-	 * files), processes hooks and proxies, sanitises paths, and finally passes them on to 
+	 *
+	 * This method takes requests for basic filesystem functions (e.g. reading & writing
+	 * files), processes hooks and proxies, sanitises paths, and finally passes them on to
 	 * OC_Filestorage for delegation to a storage backend for execution
 	 */
-	private function basicOperation($operation,$path,$hooks=array(),$extraParam=null){
-		$absolutePath=$this->getAbsolutePath($path);
-		if(OC_FileProxy::runPreProxies($operation,$absolutePath, $extraParam) and OC_Filesystem::isValidPath($path)){
-			$path=$this->getRelativePath($absolutePath);
-			if($path==null){
+	private function basicOperation($operation, $path, $hooks=array(), $extraParam=null) {
+		$absolutePath = $this->getAbsolutePath($path);
+		if(OC_FileProxy::runPreProxies($operation, $absolutePath, $extraParam) and OC_Filesystem::isValidPath($path)) {
+			$path = $this->getRelativePath($absolutePath);
+			if($path == null) {
 				return false;
 			}
-			$internalPath=$this->getInternalPath($path);
-			$run=true;
-			if(OC_Filesystem::$loaded and $this->fakeRoot==OC_Filesystem::getRoot()){
-				foreach($hooks as $hook){
-					if($hook!='read'){
-						OC_Hook::emit( OC_Filesystem::CLASSNAME, $hook, array( OC_Filesystem::signal_param_path => $path, OC_Filesystem::signal_param_run => &$run));
-					}else{
-						OC_Hook::emit( OC_Filesystem::CLASSNAME, $hook, array( OC_Filesystem::signal_param_path => $path));
+			$internalPath = $this->getInternalPath($path);
+			$run = true;
+			if(OC_Filesystem::$loaded and $this->fakeRoot==OC_Filesystem::getRoot()) {
+				foreach($hooks as $hook) {
+					if($hook!='read') {
+						OC_Hook::emit(
+							OC_Filesystem::CLASSNAME,
+							$hook,
+							array(
+								OC_Filesystem::signal_param_path => $path,
+								OC_Filesystem::signal_param_run => &$run
+							)
+						);
+					} else {
+						OC_Hook::emit(
+							OC_Filesystem::CLASSNAME,
+							$hook,
+							array( OC_Filesystem::signal_param_path => $path)
+						);
 					}
 				}
 			}
-			if($run and $storage=$this->getStorage($path)){
-				if(!is_null($extraParam)){
-					$result=$storage->$operation($internalPath,$extraParam);
-				}else{
-					$result=$storage->$operation($internalPath);
+			if($run and $storage = $this->getStorage($path)) {
+				if(!is_null($extraParam)) {
+					$result = $storage->$operation($internalPath, $extraParam);
+				} else {
+					$result = $storage->$operation($internalPath);
 				}
-				$result=OC_FileProxy::runPostProxies($operation,$this->getAbsolutePath($path),$result);
-				if(OC_Filesystem::$loaded and $this->fakeRoot==OC_Filesystem::getRoot()){
-					if($operation!='fopen'){//no post hooks for fopen, the file stream is still open
-						foreach($hooks as $hook){
+				$result = OC_FileProxy::runPostProxies($operation, $this->getAbsolutePath($path), $result);
+				if(OC_Filesystem::$loaded and $this->fakeRoot==OC_Filesystem::getRoot()) {
+					if($operation!='fopen') {//no post hooks for fopen, the file stream is still open
+						foreach($hooks as $hook) {
 							if($hook!='read'){
-								OC_Hook::emit( OC_Filesystem::CLASSNAME, 'post_'.$hook, array( OC_Filesystem::signal_param_path => $path));
+								OC_Hook::emit(
+									OC_Filesystem::CLASSNAME,
+									'post_'.$hook,
+									array( OC_Filesystem::signal_param_path => $path)
+								);
 							}
 						}
 					}
@@ -478,7 +585,7 @@ class OC_FilesystemView {
 	 * @param int $time
 	 * @return bool
 	 */
-	public function hasUpdated($path,$time){
-		return $this->basicOperation('hasUpdated',$path,array(),$time);
+	public function hasUpdated($path, $time) {
+		return $this->basicOperation('hasUpdated', $path, array(), $time);
 	}
 }
diff --git a/lib/group.php b/lib/group.php
index ceee5fa4edb..12e5f5ebb30 100644
--- a/lib/group.php
+++ b/lib/group.php
@@ -43,7 +43,7 @@ class OC_Group {
 	 * @returns true/false
 	 */
 	public static function useBackend( $backend ){
-		if($backend instanceof OC_Group_Backend){
+		if($backend instanceof OC_Group_Interface){
 			self::$_usedBackends[]=$backend;
 		}
 	}
@@ -168,7 +168,7 @@ class OC_Group {
 
 		if($run){
 			$succes=false;
-			
+
 			//add the user to the all backends that have the group
 			foreach(self::$_usedBackends as $backend){
 				if(!$backend->implementsActions(OC_GROUP_BACKEND_ADD_TO_GROUP))
@@ -245,7 +245,7 @@ class OC_Group {
 		asort($groups);
 		return $groups;
 	}
-	
+
 	/**
 	 * check if a group exists
 	 * @param string $gid
@@ -259,7 +259,7 @@ class OC_Group {
 		}
 		return false;
 	}
-	
+
 	/**
 	 * @brief get a list of all users in a group
 	 * @returns array with user ids
diff --git a/lib/group/backend.php b/lib/group/backend.php
index 24778afd1e5..ebc078f152a 100644
--- a/lib/group/backend.php
+++ b/lib/group/backend.php
@@ -37,7 +37,7 @@ define('OC_GROUP_BACKEND_REMOVE_FROM_GOUP',  0x00001000);
 /**
  * Abstract base class for user management
  */
-abstract class OC_Group_Backend {
+abstract class OC_Group_Backend implements OC_Group_Interface {
 	protected $possibleActions = array(
 		OC_GROUP_BACKEND_CREATE_GROUP => 'createGroup',
 		OC_GROUP_BACKEND_DELETE_GROUP => 'deleteGroup',
diff --git a/lib/group/database.php b/lib/group/database.php
index fb173665eb8..2770ec185c4 100644
--- a/lib/group/database.php
+++ b/lib/group/database.php
@@ -41,7 +41,6 @@
  * Class for group management in a SQL Database (e.g. MySQL, SQLite)
  */
 class OC_Group_Database extends OC_Group_Backend {
-	private $userGroupCache=array();
 
 	/**
 	 * @brief Try to create a new group
@@ -116,7 +115,7 @@ class OC_Group_Database extends OC_Group_Backend {
 		// No duplicate entries!
 		if( !$this->inGroup( $uid, $gid )){
 			$query = OC_DB::prepare( "INSERT INTO `*PREFIX*group_user` ( `uid`, `gid` ) VALUES( ?, ? )" );
-			$result = $query->execute( array( $uid, $gid ));
+			$query->execute( array( $uid, $gid ));
 			return true;
 		}else{
 			return false;
@@ -133,7 +132,7 @@ class OC_Group_Database extends OC_Group_Backend {
 	 */
 	public function removeFromGroup( $uid, $gid ){
 		$query = OC_DB::prepare( "DELETE FROM *PREFIX*group_user WHERE uid = ? AND gid = ?" );
-		$result = $query->execute( array( $uid, $gid ));
+		$query->execute( array( $uid, $gid ));
 
 		return true;
 	}
diff --git a/lib/group/dummy.php b/lib/group/dummy.php
index 0825b10708a..1243891023f 100644
--- a/lib/group/dummy.php
+++ b/lib/group/dummy.php
@@ -126,7 +126,8 @@ class OC_Group_Dummy extends OC_Group_Backend {
 	 */
 	public function getUserGroups($uid){
 		$groups=array();
-		foreach($this->groups as $group=>$user){
+		$allGroups=array_keys($this->groups);
+		foreach($allGroups as $group){
 			if($this->inGroup($uid,$group)){
 				$groups[]=$group;
 			}
diff --git a/lib/group/example.php b/lib/group/example.php
index c18562db7a4..9c9ece5ac77 100644
--- a/lib/group/example.php
+++ b/lib/group/example.php
@@ -34,7 +34,7 @@ abstract class OC_Group_Example {
 	 * Trys to create a new group. If the group name already exists, false will
 	 * be returned.
 	 */
-	public static function createGroup($gid){}
+	abstract public static function createGroup($gid);
 
 	/**
 	 * @brief delete a group
@@ -43,7 +43,7 @@ abstract class OC_Group_Example {
 	 *
 	 * Deletes a group and removes it from the group_user-table
 	 */
-	public static function deleteGroup($gid){}
+	abstract public static function deleteGroup($gid);
 
 	/**
 	 * @brief is user in group?
@@ -53,7 +53,7 @@ abstract class OC_Group_Example {
 	 *
 	 * Checks whether the user is member of a group or not.
 	 */
-	public static function inGroup($uid, $gid){}
+	abstract public static function inGroup($uid, $gid);
 
 	/**
 	 * @brief Add a user to a group
@@ -63,7 +63,7 @@ abstract class OC_Group_Example {
 	 *
 	 * Adds a user to a group.
 	 */
-	public static function addToGroup($uid, $gid){}
+	abstract public static function addToGroup($uid, $gid);
 
 	/**
 	 * @brief Removes a user from a group
@@ -73,7 +73,7 @@ abstract class OC_Group_Example {
 	 *
 	 * removes the user from a group.
 	 */
-	public static function removeFromGroup($uid,$gid){}
+	abstract public static function removeFromGroup($uid,$gid);
 
 	/**
 	 * @brief Get all groups a user belongs to
@@ -83,7 +83,7 @@ abstract class OC_Group_Example {
 	 * This function fetches all groups a user belongs to. It does not check
 	 * if the user exists at all.
 	 */
-	public static function getUserGroups($uid){}
+	abstract public static function getUserGroups($uid);
 
 	/**
 	 * @brief get a list of all groups
@@ -91,19 +91,19 @@ abstract class OC_Group_Example {
 	 *
 	 * Returns a list with all groups
 	 */
-	public static function getGroups(){}
+	abstract public static function getGroups();
 
 	/**
 	 * check if a group exists
 	 * @param string $gid
 	 * @return bool
 	 */
-	public function groupExists($gid){}
+	abstract public function groupExists($gid);
 
 	/**
 	 * @brief get a list of all users in a group
 	 * @returns array with user ids
 	 */
-	public static function usersInGroup($gid){}
+	abstract public static function usersInGroup($gid);
 
 }
diff --git a/lib/group/interface.php b/lib/group/interface.php
new file mode 100644
index 00000000000..7cca6061e10
--- /dev/null
+++ b/lib/group/interface.php
@@ -0,0 +1,76 @@
+<?php
+
+/**
+ * ownCloud - group interface
+ *
+ * @author Arthur Schiwon
+ * @copyright 2012 Arthur Schiwon blizzz@owncloud.org
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+interface OC_Group_Interface {
+	/**
+	* @brief Check if backend implements actions
+	* @param $actions bitwise-or'ed actions
+	* @returns boolean
+	*
+	* Returns the supported actions as int to be
+	* compared with OC_GROUP_BACKEND_CREATE_GROUP etc.
+	*/
+	public function implementsActions($actions);
+
+	/**
+	 * @brief is user in group?
+	 * @param $uid uid of the user
+	 * @param $gid gid of the group
+	 * @returns true/false
+	 *
+	 * Checks whether the user is member of a group or not.
+	 */
+	public function inGroup($uid, $gid);
+
+	/**
+	 * @brief Get all groups a user belongs to
+	 * @param $uid Name of the user
+	 * @returns array with group names
+	 *
+	 * This function fetches all groups a user belongs to. It does not check
+	 * if the user exists at all.
+	 */
+	public function getUserGroups($uid);
+
+	/**
+	 * @brief get a list of all groups
+	 * @returns array with group names
+	 *
+	 * Returns a list with all groups
+	 */
+	public function getGroups();
+
+	/**
+	 * check if a group exists
+	 * @param string $gid
+	 * @return bool
+	 */
+	public function groupExists($gid);
+
+	/**
+	 * @brief get a list of all users in a group
+	 * @returns array with user ids
+	 */
+	public function usersInGroup($gid);
+
+}
\ No newline at end of file
diff --git a/lib/helper.php b/lib/helper.php
index 0d18098a4e7..666bc6badfc 100644
--- a/lib/helper.php
+++ b/lib/helper.php
@@ -175,10 +175,8 @@ class OC_Helper {
 	 */
 	public static function mimetypeIcon( $mimetype ){
 		$alias=array('application/xml'=>'code/xml');
-// 		echo $mimetype;
 		if(isset($alias[$mimetype])){
 			$mimetype=$alias[$mimetype];
-// 			echo $mimetype;
 		}
 		// Replace slash with a minus
 		$mimetype = str_replace( "/", "-", $mimetype );
@@ -345,18 +343,24 @@ class OC_Helper {
 	 */
 	static function getMimeType($path){
 		$isWrapped=(strpos($path,'://')!==false) and (substr($path,0,7)=='file://');
-		$mimeType='application/octet-stream';
-		if ($mimeType=='application/octet-stream') {
-			self::$mimetypes = include('mimetypes.fixlist.php');
-			$extension=strtolower(strrchr(basename($path), "."));
-			$extension=substr($extension,1);//remove leading .
-			$mimeType=(isset(self::$mimetypes[$extension]))?self::$mimetypes[$extension]:'application/octet-stream';
 
-		}
 		if (@is_dir($path)) {
 			// directories are easy
 			return "httpd/unix-directory";
 		}
+
+		if(strpos($path,'.')){
+			//try to guess the type by the file extension
+			if(!self::$mimetypes || self::$mimetypes != include('mimetypes.list.php')){
+				self::$mimetypes=include('mimetypes.list.php');
+			}
+			$extension=strtolower(strrchr(basename($path), "."));
+			$extension=substr($extension,1);//remove leading .
+			$mimeType=(isset(self::$mimetypes[$extension]))?self::$mimetypes[$extension]:'application/octet-stream';
+		}else{
+			$mimeType='application/octet-stream';
+		}
+
 		if($mimeType=='application/octet-stream' and function_exists('finfo_open') and function_exists('finfo_file') and $finfo=finfo_open(FILEINFO_MIME)){
 			$info = @strtolower(finfo_file($finfo,$path));
 			if($info){
@@ -385,15 +389,6 @@ class OC_Helper {
 			}
 
 		}
-		if ($mimeType=='application/octet-stream') {
-			// Fallback solution: (try to guess the type by the file extension
-			if(!self::$mimetypes || self::$mimetypes != include('mimetypes.list.php')){
-				self::$mimetypes=include('mimetypes.list.php');
-			}
-			$extension=strtolower(strrchr(basename($path), "."));
-			$extension=substr($extension,1);//remove leading .
-			$mimeType=(isset(self::$mimetypes[$extension]))?self::$mimetypes[$extension]:'application/octet-stream';
-		}
 		return $mimeType;
 	}
 
@@ -676,12 +671,38 @@ class OC_Helper {
 	*/
 	public static function mb_str_replace($search, $replace, $subject, $encoding = 'UTF-8', &$count = null) {
 		$offset = -1;
-		$length = mb_strlen($search, 'UTF-8');
-		while(($i = mb_strrpos($subject, $search, $offset, 'UTF-8'))) {
+		$length = mb_strlen($search, $encoding);
+		while(($i = mb_strrpos($subject, $search, $offset, $encoding))) {
 			$subject = OC_Helper::mb_substr_replace($subject, $replace, $i, $length);
-			$offset = $i - mb_strlen($subject, 'UTF-8') - 1;
+			$offset = $i - mb_strlen($subject, $encoding) - 1;
 			$count++;
 		}
 		return $subject;
 	}
+
+	/**
+	* @brief performs a search in a nested array
+	* @param haystack the array to be searched
+	* @param needle the search string
+	* @param $index optional, only search this key name
+	* @return the key of the matching field, otherwise false
+	*
+	* performs a search in a nested array
+	*
+	* taken from http://www.php.net/manual/en/function.array-search.php#97645
+	*/
+	public static function recursiveArraySearch($haystack, $needle, $index = null) {
+		$aIt = new RecursiveArrayIterator($haystack);
+		$it = new RecursiveIteratorIterator($aIt);
+
+		while($it->valid()) {
+			if (((isset($index) AND ($it->key() == $index)) OR (!isset($index))) AND ($it->current() == $needle)) {
+				return $aIt->key();
+			}
+
+			$it->next();
+		}
+
+		return false;
+	}
 }
diff --git a/lib/image.php b/lib/image.php
index 01e843d8316..90c64320a7c 100644
--- a/lib/image.php
+++ b/lib/image.php
@@ -23,12 +23,12 @@
 
 //From user comments at http://dk2.php.net/manual/en/function.exif-imagetype.php
 if ( ! function_exists( 'exif_imagetype' ) ) {
-    function exif_imagetype ( $filename ) {
-        if ( ( list($width, $height, $type, $attr) = getimagesize( $filename ) ) !== false ) {
-            return $type;
-        }
-    return false;
-    }
+	function exif_imagetype ( $filename ) {
+		if ( ( $info = getimagesize( $filename ) ) !== false ) {
+			return $info[2];
+		}
+		return false;
+	}
 }
 
 function ellipsis($str, $maxlen) {
@@ -66,7 +66,6 @@ class OC_Image {
 	public function __construct($imageref = null) {
 		//OC_Log::write('core',__METHOD__.'(): start', OC_Log::DEBUG);
 		if(!extension_loaded('gd') || !function_exists('gd_info')) {
-		//if(!function_exists('imagecreatefromjpeg')) {
 			OC_Log::write('core',__METHOD__.'(): GD module not installed', OC_Log::ERROR);
 			return false;
 		}
@@ -364,7 +363,7 @@ class OC_Image {
 	public function load($imageref) {
 		if(is_resource($imageref)) {
 			if(get_resource_type($imageref) == 'gd') {
-				$this->resource = $res;
+				$this->resource = $imageref;
 				return $this->resource;
 			} elseif(in_array(get_resource_type($imageref), array('file','stream'))) {
 				return $this->loadFromFileHandle($imageref);
@@ -650,9 +649,6 @@ class OC_Image {
 			OC_Log::write('core',__METHOD__.'(): No image loaded', OC_Log::ERROR);
 			return false;
 		}
-		$width_orig=imageSX($this->resource);
-		$height_orig=imageSY($this->resource);
-		//OC_Log::write('core',__METHOD__.'(): Original size: '.$width_orig.'x'.$height_orig, OC_Log::DEBUG);
 		$process = imagecreatetruecolor($w, $h);
 		if ($process == false) {
 			OC_Log::write('core',__METHOD__.'(): Error creating true color image',OC_Log::ERROR);
diff --git a/lib/installer.php b/lib/installer.php
index 00feb6d4709..a8b56cb34f2 100644
--- a/lib/installer.php
+++ b/lib/installer.php
@@ -126,19 +126,19 @@ class OC_Installer{
 			return false;
 		}
 		$info=OC_App::getAppInfo($extractDir.'/appinfo/info.xml',true);
-                // check the code for not allowed calls
-                if(!OC_Installer::checkCode($info['id'],$extractDir)){
+		// check the code for not allowed calls
+		if(!OC_Installer::checkCode($info['id'],$extractDir)){
 			OC_Log::write('core','App can\'t be installed because of not allowed code in the App',OC_Log::ERROR);
 			OC_Helper::rmdirr($extractDir);
-                        return false;
+			return false;
 		}
 
-                // check if the app is compatible with this version of ownCloud
+		// check if the app is compatible with this version of ownCloud
 		$version=OC_Util::getVersion();	
-                if(!isset($info['require']) or ($version[0]>$info['require'])){
+		if(!isset($info['require']) or ($version[0]>$info['require'])){
 			OC_Log::write('core','App can\'t be installed because it is not compatible with this version of ownCloud',OC_Log::ERROR);
 			OC_Helper::rmdirr($extractDir);
-                        return false;
+			return false;
 		}
 
 		//check if an app with the same id is already installed
@@ -339,12 +339,12 @@ class OC_Installer{
 	}
 
 
-        /**
-         * check the code of an app with some static code checks
-         * @param string $folder the folder of the app to check
-         * @returns true for app is o.k. and false for app is not o.k.
-         */
-        public static function checkCode($appname,$folder){
+	/**
+	 * check the code of an app with some static code checks
+	 * @param string $folder the folder of the app to check
+	 * @returns true for app is o.k. and false for app is not o.k.
+	 */
+	public static function checkCode($appname,$folder){
 
 		$blacklist=array(
 			'exec(',
@@ -377,9 +377,7 @@ class OC_Installer{
 			return true;
 			
 		}else{
-          		return true;
+			return true;
 		}
-        }
-
-
+	}
 }
diff --git a/lib/json.php b/lib/json.php
index c49b831c12b..b46878375d5 100644
--- a/lib/json.php
+++ b/lib/json.php
@@ -94,12 +94,12 @@ class OC_JSON{
 	* Encode and print $data in json format
 	*/
 	public static function encodedPrint($data,$setContentType=true){
-			// Disable mimesniffing, don't move this to setContentTypeHeader!
-			header( 'X-Content-Type-Options: nosniff' );
-			if($setContentType){
-				self::setContentTypeHeader();
-			}
-			array_walk_recursive($data, array('OC_JSON', 'to_string'));
-			echo json_encode($data);
+		// Disable mimesniffing, don't move this to setContentTypeHeader!
+		header( 'X-Content-Type-Options: nosniff' );
+		if($setContentType){
+			self::setContentTypeHeader();
+		}
+		array_walk_recursive($data, array('OC_JSON', 'to_string'));
+		echo json_encode($data);
 	}
 }
diff --git a/lib/l10n.php b/lib/l10n.php
index de8514573d3..e7f5ffea0e4 100644
--- a/lib/l10n.php
+++ b/lib/l10n.php
@@ -154,8 +154,15 @@ class OC_L10N{
 	 *
 	 * Returns the translation. If no translation is found, $textArray will be
 	 * returned.
+	 *
+	 *
+	 * @deprecated deprecated since ownCloud version 5.0
+	 * This method will probably be removed with ownCloud 6.0
+	 *
+	 *
 	 */
 	public function tA($textArray){
+		OC_Log::write('core', 'DEPRECATED: the method tA is deprecated and will be removed soon.',OC_Log::WARN);
 		$result = array();
 		foreach($textArray as $key => $text){
 			$result[$key] = (string)$this->t($text);
diff --git a/lib/migrate.php b/lib/migrate.php
index f788a637d3c..1b6367ed6ec 100644
--- a/lib/migrate.php
+++ b/lib/migrate.php
@@ -91,7 +91,7 @@ class OC_Migrate{
 	 	if( self::$exporttype == 'user' ){
 	 		// Check user exists
 	 		if( !is_null($uid) ){
-                                $db = new OC_User_Database;
+				$db = new OC_User_Database;
 		 		if( !$db->userExists( $uid ) ){
 					OC_Log::write('migration', 'User: '.$uid.' is not in the database and so cannot be exported.', OC_Log::ERROR);
 					return json_encode( array( 'success' => false ) );
diff --git a/lib/mimetypes.fixlist.php b/lib/mimetypes.fixlist.php
deleted file mode 100644
index 13e3f16b369..00000000000
--- a/lib/mimetypes.fixlist.php
+++ /dev/null
@@ -1,22 +0,0 @@
-<?php
-return array(
-	'ics'=>'text/calendar',
-	'ical'=>'text/calendar',
-	'js'=>'application/javascript',
-	'odt'=>'application/vnd.oasis.opendocument.text',
-	'ods'=>'application/vnd.oasis.opendocument.spreadsheet',
-	'odg'=>'application/vnd.oasis.opendocument.graphics',
-	'odp'=>'application/vnd.oasis.opendocument.presentation',
-	'pl'=>'text/x-script.perl',
-	'py'=>'text/x-script.phyton',
-	'vcf' => 'text/vcard',
-	'vcard' => 'text/vcard',
-	'doc'=>'application/msword',
-	'docx'=>'application/msword',
-	'xls'=>'application/msexcel',
-	'xlsx'=>'application/msexcel',
-	'ppt'=>'application/mspowerpoint',
-	'pptx'=>'application/mspowerpoint',
-	'sgf' => 'application/sgf',
-	'cdr' => 'application/coreldraw'
-);
diff --git a/lib/mimetypes.list.php b/lib/mimetypes.list.php
index ccf47999b1c..f7207493f7f 100644
--- a/lib/mimetypes.list.php
+++ b/lib/mimetypes.list.php
@@ -78,5 +78,16 @@ return array(
 	'mpeg'=>'video/mpeg',
 	'mov'=>'video/quicktime',
 	'webm'=>'video/webm',
-	'wmv'=>'video/x-ms-asf'
+	'wmv'=>'video/x-ms-asf',
+	'py'=>'text/x-script.phyton',
+	'vcf' => 'text/vcard',
+	'vcard' => 'text/vcard',
+	'doc'=>'application/msword',
+	'docx'=>'application/msword',
+	'xls'=>'application/msexcel',
+	'xlsx'=>'application/msexcel',
+	'ppt'=>'application/mspowerpoint',
+	'pptx'=>'application/mspowerpoint',
+	'sgf' => 'application/sgf',
+	'cdr' => 'application/coreldraw',
 );
diff --git a/lib/minimizer.php b/lib/minimizer.php
index 3bf5ff9980b..3dc89e331a6 100644
--- a/lib/minimizer.php
+++ b/lib/minimizer.php
@@ -46,3 +46,13 @@ abstract class OC_Minimizer {
 		echo $out;
 	}
 }
+
+if (!function_exists('gzdecode')) {
+	function gzdecode($data,$maxlength=null,&$filename='',&$error='')
+	{
+		if (strcmp(substr($data,0,9),"\x1f\x8b\x8\0\0\0\0\0\0")) {
+			return null;  // Not the GZIP format we expect (See RFC 1952)
+		}
+		return gzinflate(substr($data,10,-8));
+	}
+}
diff --git a/lib/ocs.php b/lib/ocs.php
index 1be41202d78..3157aae99e6 100644
--- a/lib/ocs.php
+++ b/lib/ocs.php
@@ -4,7 +4,9 @@
 * ownCloud
 *
 * @author Frank Karlitschek
+* @author Michael Gapczynski
 * @copyright 2012 Frank Karlitschek frank@owncloud.org
+* @copyright 2012 Michael Gapczynski mtgap@owncloud.com
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
@@ -29,429 +31,453 @@
  */
 class OC_OCS {
 
-  /**
-   * reads input date from get/post/cookies and converts the date to a special data-type
-   *
-   * @param variable $key
-   * @param variable-type $type
-   * @param priority $getpriority
-   * @param default  $default
-   * @return data
-   */
-  public static function readData($key,$type='raw',$getpriority=false,$default='') {
-    if($getpriority) {
-      if(isset($_GET[$key])) {
-        $data=$_GET[$key];
-      } elseif(isset($_POST[$key])) {
-        $data=$_POST[$key];
-      } else {
-        if($default=='') {
-          if(($type=='int') or ($type=='float')) $data=0; else $data='';
-        } else {
-          $data=$default;
-        }
-      }
-    } else {
-      if(isset($_POST[$key])) {
-        $data=$_POST[$key];
-      } elseif(isset($_GET[$key])) {
-        $data=$_GET[$key];
-      } elseif(isset($_COOKIE[$key])) {
-        $data=$_COOKIE[$key];
-      } else {
-        if($default=='') {
-          if(($type=='int') or ($type=='float')) $data=0; else $data='';
-        } else {
-          $data=$default;
-        }
-      }
-    }
-
-    if($type=='raw') return($data);
-    elseif($type=='text') return(addslashes(strip_tags($data)));
-    elseif($type=='int')  { $data = (int) $data; return($data); }
-    elseif($type=='float')  { $data = (float) $data; return($data); }
-    elseif($type=='array')  { $data = $data; return($data); }
-  }
-
-
-  /**
-    main function to handle the REST request
-  **/
-  public static function handle() {
-
-    // overwrite the 404 error page returncode
-    header("HTTP/1.0 200 OK");
-
-
-    if($_SERVER['REQUEST_METHOD'] == 'GET') {
-       $method='get';
-    }elseif($_SERVER['REQUEST_METHOD'] == 'PUT') {
-       $method='put';
-       parse_str(file_get_contents("php://input"),$put_vars);
-    }elseif($_SERVER['REQUEST_METHOD'] == 'POST') {
-       $method='post';
-    }else{
-      echo('internal server error: method not supported');
-      exit();
-    }
-
-    // preprocess url
-    $url=$_SERVER['REQUEST_URI'];
-    if(substr($url,(strlen($url)-1))<>'/') $url.='/';
-    $ex=explode('/',$url);
-    $paracount=count($ex);
-
-    // eventhandler
-    // CONFIG
-    // apiconfig - GET - CONFIG
-    if(($method=='get') and (strtolower($ex[$paracount-3])=='v1.php') and (strtolower($ex[$paracount-2])=='config')){
-      $format=OC_OCS::readdata('format','text');
-      OC_OCS::apiconfig($format);
-
-    // PERSON
-    // personcheck - POST - PERSON/CHECK
-    }elseif(($method=='post') and (strtolower($ex[$paracount-4])=='v1.php') and (strtolower($ex[$paracount-3])=='person') and  (strtolower($ex[$paracount-2])=='check')){
-      $format=OC_OCS::readdata('format','text');
-      $login=OC_OCS::readdata('login','text');
-      $passwd=OC_OCS::readdata('password','text');
-      OC_OCS::personcheck($format,$login,$passwd);
-
-    // ACTIVITY
-    // activityget - GET ACTIVITY   page,pagesize als urlparameter
-    }elseif(($method=='get') and (strtolower($ex[$paracount-3])=='v1.php')and (strtolower($ex[$paracount-2])=='activity')){
-      $format=OC_OCS::readdata('format','text');
-      $page=OC_OCS::readdata('page','int');
-      $pagesize=OC_OCS::readdata('pagesize','int');
-      if($pagesize<1 or $pagesize>100) $pagesize=10;
-      OC_OCS::activityget($format,$page,$pagesize);
-
-    // activityput - POST ACTIVITY
-    }elseif(($method=='post') and (strtolower($ex[$paracount-3])=='v1.php')and (strtolower($ex[$paracount-2])=='activity')){
-      $format=OC_OCS::readdata('format','text');
-      $message=OC_OCS::readdata('message','text');
-      OC_OCS::activityput($format,$message);
-
-    // PRIVATEDATA
-    // get - GET DATA
-    }elseif(($method=='get') and (strtolower($ex[$paracount-4])=='v1.php')and (strtolower($ex[$paracount-2])=='getattribute')){
-      $format=OC_OCS::readdata('format','text');
-      OC_OCS::privateDataGet($format);
-
-    }elseif(($method=='get') and (strtolower($ex[$paracount-5])=='v1.php')and (strtolower($ex[$paracount-3])=='getattribute')){
-      $format=OC_OCS::readdata('format','text');
-      $app=$ex[$paracount-2];
-      OC_OCS::privateDataGet($format, $app);
-	}elseif(($method=='get') and (strtolower($ex[$paracount-6])=='v1.php')and (strtolower($ex[$paracount-4])=='getattribute')){
-      $format=OC_OCS::readdata('format','text');
-      $key=$ex[$paracount-2];
-      $app=$ex[$paracount-3];
-      OC_OCS::privateDataGet($format, $app,$key);
-
-    // set - POST DATA
-    }elseif(($method=='post') and (strtolower($ex[$paracount-6])=='v1.php')and (strtolower($ex[$paracount-4])=='setattribute')){
-      $format=OC_OCS::readdata('format','text');
-      $key=$ex[$paracount-2];
-      $app=$ex[$paracount-3];
-      $value=OC_OCS::readdata('value','text');
-      OC_OCS::privatedataset($format, $app, $key, $value);
-    // delete - POST DATA
-    }elseif(($method=='post') and (strtolower($ex[$paracount-6])=='v1.php')and (strtolower($ex[$paracount-4])=='deleteattribute')){
-      $format=OC_OCS::readdata('format','text');
-      $key=$ex[$paracount-2];
-      $app=$ex[$paracount-3];
-      OC_OCS::privatedatadelete($format, $app, $key);
-
-    }else{
-      $format=OC_OCS::readdata('format','text');
-      $txt='Invalid query, please check the syntax. API specifications are here: http://www.freedesktop.org/wiki/Specifications/open-collaboration-services. DEBUG OUTPUT:'."\n";
-      $txt.=OC_OCS::getdebugoutput();
-      echo(OC_OCS::generatexml($format,'failed',999,$txt));
-    }
-    exit();
-  }
-
-  /**
-   * generated some debug information to make it easier to find faild API calls
-   * @return debug data string
-   */
-  private static function getDebugOutput() {
-    $txt='';
-    $txt.="debug output:\n";
-    if(isset($_SERVER['REQUEST_METHOD'])) $txt.='http request method: '.$_SERVER['REQUEST_METHOD']."\n";
-    if(isset($_SERVER['REQUEST_URI'])) $txt.='http request uri: '.$_SERVER['REQUEST_URI']."\n";
-    if(isset($_GET)) foreach($_GET as $key=>$value) $txt.='get parameter: '.$key.'->'.$value."\n";
-    if(isset($_POST)) foreach($_POST as $key=>$value) $txt.='post parameter: '.$key.'->'.$value."\n";
-    return($txt);
-  }
-
-  /**
-   * checks if the user is authenticated
-   * checks the IP whitlist, apikeys and login/password combination
-   * if $forceuser is true and the authentication failed it returns an 401 http response.
-   * if $forceuser is false and authentification fails it returns an empty username string
-   * @param bool $forceuser
-   * @return username string
-   */
-  private static function checkPassword($forceuser=true) {
-    //valid user account ?
-    if(isset($_SERVER['PHP_AUTH_USER'])) $authuser=$_SERVER['PHP_AUTH_USER']; else $authuser='';
-    if(isset($_SERVER['PHP_AUTH_PW']))   $authpw=$_SERVER['PHP_AUTH_PW']; else $authpw='';
-
-    if(empty($authuser)) {
-      if($forceuser){
-        header('WWW-Authenticate: Basic realm="your valid user account or api key"');
-        header('HTTP/1.0 401 Unauthorized');
-        exit;
-      }else{
-        $identifieduser='';
-      }
-    }else{
-      if(!OC_User::login($authuser,$authpw)){
-        if($forceuser){
-          header('WWW-Authenticate: Basic realm="your valid user account or api key"');
-          header('HTTP/1.0 401 Unauthorized');
-          exit;
-        }else{
-          $identifieduser='';
-        }
-      }else{
-        $identifieduser=$authuser;
-      }
-    }
-
-    return($identifieduser);
-  }
-
-
-  /**
-   * generates the xml or json response for the API call from an multidimenional data array.
-   * @param string $format
-   * @param string $status
-   * @param string $statuscode
-   * @param string $message
-   * @param array $data
-   * @param string $tag
-   * @param string $tagattribute
-   * @param int $dimension
-   * @param int $itemscount
-   * @param int $itemsperpage
-   * @return string xml/json
-   */
-  private static function generateXml($format,$status,$statuscode,$message,$data=array(),$tag='',$tagattribute='',$dimension=-1,$itemscount='',$itemsperpage='') {
-    if($format=='json') {
-
-      $json=array();
-      $json['status']=$status;
-      $json['statuscode']=$statuscode;
-      $json['message']=$message;
-      $json['totalitems']=$itemscount;
-      $json['itemsperpage']=$itemsperpage;
-      $json['data']=$data;
-      return(json_encode($json));
-
-
-    }else{
-      $txt='';
-      $writer = xmlwriter_open_memory();
-      xmlwriter_set_indent( $writer, 2 );
-      xmlwriter_start_document($writer );
-      xmlwriter_start_element($writer,'ocs');
-      xmlwriter_start_element($writer,'meta');
-      xmlwriter_write_element($writer,'status',$status);
-      xmlwriter_write_element($writer,'statuscode',$statuscode);
-      xmlwriter_write_element($writer,'message',$message);
-      if($itemscount<>'') xmlwriter_write_element($writer,'totalitems',$itemscount);
-      if(!empty($itemsperpage)) xmlwriter_write_element($writer,'itemsperpage',$itemsperpage);
-      xmlwriter_end_element($writer);
-      if($dimension=='0') {
-        // 0 dimensions
-        xmlwriter_write_element($writer,'data',$data);
-
-      }elseif($dimension=='1') {
-        xmlwriter_start_element($writer,'data');
-        foreach($data as $key=>$entry) {
-          xmlwriter_write_element($writer,$key,$entry);
-        }
-        xmlwriter_end_element($writer);
-
-      }elseif($dimension=='2') {
-        xmlwriter_start_element($writer,'data');
-        foreach($data as $entry) {
-          xmlwriter_start_element($writer,$tag);
-          if(!empty($tagattribute)) {
-            xmlwriter_write_attribute($writer,'details',$tagattribute);
-          }
-          foreach($entry as $key=>$value) {
-            if(is_array($value)){
-              foreach($value as $k=>$v) {
-                xmlwriter_write_element($writer,$k,$v);
-              }
-            } else {
-              xmlwriter_write_element($writer,$key,$value);
-            }
-          }
-          xmlwriter_end_element($writer);
-        }
-        xmlwriter_end_element($writer);
-
-      }elseif($dimension=='3') {
-        xmlwriter_start_element($writer,'data');
-        foreach($data as $entrykey=>$entry) {
-          xmlwriter_start_element($writer,$tag);
-          if(!empty($tagattribute)) {
-            xmlwriter_write_attribute($writer,'details',$tagattribute);
-          }
-          foreach($entry as $key=>$value) {
-            if(is_array($value)){
-              xmlwriter_start_element($writer,$entrykey);
-              foreach($value as $k=>$v) {
-                xmlwriter_write_element($writer,$k,$v);
-              }
-              xmlwriter_end_element($writer);
-            } else {
-              xmlwriter_write_element($writer,$key,$value);
-            }
-          }
-          xmlwriter_end_element($writer);
-        }
-        xmlwriter_end_element($writer);
-      }elseif($dimension=='dynamic') {
-        xmlwriter_start_element($writer,'data');
-        OC_OCS::toxml($writer,$data,'comment');
-        xmlwriter_end_element($writer);
-      }
-
-      xmlwriter_end_element($writer);
-
-      xmlwriter_end_document( $writer );
-      $txt.=xmlwriter_output_memory( $writer );
-      unset($writer);
-      return($txt);
-    }
-  }
-
-  public static function toXml($writer,$data,$node) {
-    foreach($data as $key => $value) {
-      if (is_numeric($key)) {
-        $key = $node;
-      }
-      if (is_array($value)){
-        xmlwriter_start_element($writer,$key);
-        OC_OCS::toxml($writer,$value,$node);
-        xmlwriter_end_element($writer);
-      }else{
-        xmlwriter_write_element($writer,$key,$value);
-      }
-
-    }
-  }
-
-
-
-
-  /**
-   * return the config data of this server
-   * @param string $format
-   * @return string xml/json
-   */
-  private static function apiConfig($format) {
-    $user=OC_OCS::checkpassword(false);
-    $url=substr(OCP\Util::getServerHost().$_SERVER['SCRIPT_NAME'],0,-11).'';
-
-    $xml['version']='1.5';
-    $xml['website']='ownCloud';
-    $xml['host']=OCP\Util::getServerHost();
-    $xml['contact']='';
-    $xml['ssl']='false';
-    echo(OC_OCS::generatexml($format,'ok',100,'',$xml,'config','',1));
-  }
-
-
-  /**
-   * check if the provided login/apikey/password is valid
-   * @param string $format
-   * @param string $login
-   * @param string $passwd
-   * @return string xml/json
-   */
-  private static function personCheck($format,$login,$passwd) {
-    if($login<>''){
-      if(OC_User::login($login,$passwd)){
-        $xml['person']['personid']=$login;
-        echo(OC_OCS::generatexml($format,'ok',100,'',$xml,'person','check',2));
-      }else{
-        echo(OC_OCS::generatexml($format,'failed',102,'login not valid'));
-      }
-    }else{
-      echo(OC_OCS::generatexml($format,'failed',101,'please specify all mandatory fields'));
-    }
-  }
-
-
-
-  // ACTIVITY API #############################################
-
-  /**
-   * get my activities
-   * @param string $format
-   * @param string $page
-   * @param string $pagesize
-   * @return string xml/json
-   */
-  private static function activityGet($format,$page,$pagesize) {
-    $user=OC_OCS::checkpassword();
-    
-	//TODO
-
-    $txt=OC_OCS::generatexml($format,'ok',100,'',$xml,'activity','full',2,$totalcount,$pagesize);
-    echo($txt);
-  }
-
-  /**
-   * submit a activity
-   * @param string $format
-   * @param string $message
-   * @return string xml/json
-   */
-  private static function activityPut($format,$message) {
-    // not implemented in ownCloud
-    $user=OC_OCS::checkpassword();
-    echo(OC_OCS::generatexml($format,'ok',100,''));
-  }
-
-  // PRIVATEDATA API #############################################
-
-  /**
-   * get private data and create the xml for ocs
-   * @param string $format
-   * @param string $app
-   * @param string $key
-   * @return string xml/json
-   */
-  private static function privateDataGet($format,$app="",$key="") {
-    $user=OC_OCS::checkpassword();
-	$result=OC_OCS::getData($user,$app,$key);
-    $xml=array();
-    foreach($result as $i=>$log) {
-      $xml[$i]['key']=$log['key'];
-      $xml[$i]['app']=$log['app'];
-      $xml[$i]['value']=$log['value'];
-    }
-
-
-    $txt=OC_OCS::generatexml($format, 'ok', 100, '', $xml, 'privatedata', 'full', 2, count($xml), 0);//TODO: replace 'privatedata' with 'attribute' once a new libattice has been released that works with it
-    echo($txt);
-  }
-
-  /**
-   * set private data referenced by $key to $value and generate the xml for ocs
-   * @param string $format
-   * @param string $app
-   * @param string $key
-   * @param string $value
-   * @return string xml/json
-   */
+	/**
+	* reads input date from get/post/cookies and converts the date to a special data-type
+	*
+	* @param string HTTP method to read the key from
+	* @param string Parameter to read
+	* @param string Variable type to format data
+	* @param mixed Default value to return if the key is not found
+	* @return mixed Data or if the key is not found and no default is set it will exit with a 400 Bad request
+	*/
+	public static function readData($method, $key, $type = 'raw', $default = null) {
+		if ($method == 'get') {
+			if (isset($_GET[$key])) {
+				$data = $_GET[$key];
+			} else if (isset($default)) {
+				return $default;
+			} else {
+				$data = false;
+			}
+		} else if ($method == 'post') {
+			if (isset($_POST[$key])) {
+				$data = $_POST[$key];
+			} else if (isset($default)) {
+				return $default;
+			} else {
+				$data = false;
+			}
+		}
+		if ($data === false) {
+			echo self::generateXml('', 'fail', 400, 'Bad request. Please provide a valid '.$key);
+			exit();
+		} else {
+			// NOTE: Is the raw type necessary? It might be a little risky without sanitization
+			if ($type == 'raw') return $data;
+			elseif ($type == 'text') return OC_Util::sanitizeHTML($data);
+			elseif ($type == 'int')  return (int) $data;
+			elseif ($type == 'float') return (float) $data;
+			elseif ($type == 'array') return OC_Util::sanitizeHTML($data);
+			else return OC_Util::sanitizeHTML($data);
+		}
+	}
+
+	/**
+	main function to handle the REST request
+	**/
+	public static function handle() {
+		// overwrite the 404 error page returncode
+		header("HTTP/1.0 200 OK");
+
+
+		if($_SERVER['REQUEST_METHOD'] == 'GET') {
+			$method='get';
+		}elseif($_SERVER['REQUEST_METHOD'] == 'PUT') {
+			$method='put';
+			parse_str(file_get_contents("php://input"),$put_vars);
+		}elseif($_SERVER['REQUEST_METHOD'] == 'POST') {
+			$method='post';
+		}else{
+			echo('internal server error: method not supported');
+			exit();
+		}
+
+		// preprocess url
+		$url = strtolower($_SERVER['REQUEST_URI']);
+		if(substr($url,(strlen($url)-1))<>'/') $url.='/';
+		$ex=explode('/',$url);
+		$paracount=count($ex);
+		$format = self::readData($method, 'format', 'text', '');
+
+		// eventhandler
+		// CONFIG
+		// apiconfig - GET - CONFIG
+		if(($method=='get') and ($ex[$paracount-3] == 'v1.php') and ($ex[$paracount-2] == 'config')){
+			OC_OCS::apiconfig($format);
+
+		// PERSON
+		// personcheck - POST - PERSON/CHECK
+		}elseif(($method=='post') and ($ex[$paracount-4] == 'v1.php') and ($ex[$paracount-3]=='person') and ($ex[$paracount-2] == 'check')){
+			$login = self::readData($method, 'login', 'text');
+			$passwd = self::readData($method, 'password', 'text');
+			OC_OCS::personcheck($format,$login,$passwd);
+
+		// ACTIVITY
+		// activityget - GET ACTIVITY   page,pagesize als urlparameter
+		}elseif(($method=='get') and ($ex[$paracount-3] == 'v1.php') and ($ex[$paracount-2] == 'activity')){
+			$page = self::readData($method, 'page', 'int', 0);
+			$pagesize = self::readData($method, 'pagesize','int', 10);
+			if($pagesize<1 or $pagesize>100) $pagesize=10;
+			OC_OCS::activityget($format,$page,$pagesize);
+
+		// activityput - POST ACTIVITY
+		}elseif(($method=='post') and ($ex[$paracount-3] == 'v1.php') and ($ex[$paracount-2] == 'activity')){
+			$message = self::readData($method, 'message', 'text');
+			OC_OCS::activityput($format,$message);
+
+
+		// PRIVATEDATA
+		// get - GET DATA
+		}elseif(($method=='get') and ($ex[$paracount-4] == 'v1.php') and ($ex[$paracount-2] == 'getattribute')){
+			OC_OCS::privateDataGet($format);
+
+		}elseif(($method=='get') and ($ex[$paracount-5] == 'v1.php') and ($ex[$paracount-3] == 'getattribute')){
+			$app=$ex[$paracount-2];
+			OC_OCS::privateDataGet($format, $app);
+		}elseif(($method=='get') and ($ex[$paracount-6] == 'v1.php') and ($ex[$paracount-4] == 'getattribute')){
+
+			$key=$ex[$paracount-2];
+			$app=$ex[$paracount-3];
+			OC_OCS::privateDataGet($format, $app,$key);
+
+		// set - POST DATA
+		}elseif(($method=='post') and ($ex[$paracount-6] == 'v1.php') and ($ex[$paracount-4] == 'setattribute')){
+			$key=$ex[$paracount-2];
+			$app=$ex[$paracount-3];
+			$value = self::readData($method, 'value', 'text');
+			OC_OCS::privatedataset($format, $app, $key, $value);
+		// delete - POST DATA
+		}elseif(($method=='post') and ($ex[$paracount-6] =='v1.php') and ($ex[$paracount-4] == 'deleteattribute')){
+			$key=$ex[$paracount-2];
+			$app=$ex[$paracount-3];
+			OC_OCS::privatedatadelete($format, $app, $key);
+
+		// CLOUD
+		// systemWebApps 
+		}elseif(($method=='get') and ($ex[$paracount-5] == 'v1.php') and ($ex[$paracount-4]=='cloud') and ($ex[$paracount-3] == 'system') and ($ex[$paracount-2] == 'webapps')){
+			OC_OCS::systemwebapps($format);
+
+		// quotaget 
+		}elseif(($method=='get') and ($ex[$paracount-6] == 'v1.php') and ($ex[$paracount-5]=='cloud') and ($ex[$paracount-4] == 'user') and ($ex[$paracount-2] == 'quota')){
+			$user=$ex[$paracount-3];
+			OC_OCS::quotaget($format,$user);
+
+		// quotaset 
+		}elseif(($method=='post') and ($ex[$paracount-6] == 'v1.php') and ($ex[$paracount-5]=='cloud') and ($ex[$paracount-4] == 'user') and ($ex[$paracount-2] == 'quota')){
+			$user=$ex[$paracount-3];
+			$quota = self::readData('post', 'quota', 'int');
+			OC_OCS::quotaset($format,$user,$quota);
+
+		// keygetpublic 
+		}elseif(($method=='get') and ($ex[$paracount-6] == 'v1.php') and ($ex[$paracount-5]=='cloud') and ($ex[$paracount-4] == 'user') and ($ex[$paracount-2] == 'publickey')){
+			$user=$ex[$paracount-3];
+			OC_OCS::publicKeyGet($format,$user);
+
+		// keygetprivate 
+		}elseif(($method=='get') and ($ex[$paracount-6] == 'v1.php') and ($ex[$paracount-5]=='cloud') and ($ex[$paracount-4] == 'user') and ($ex[$paracount-2] == 'privatekey')){
+			$user=$ex[$paracount-3];
+			OC_OCS::privateKeyGet($format,$user);
+
+
+// add more calls here
+// please document all the call in the draft spec
+// http://www.freedesktop.org/wiki/Specifications/open-collaboration-services-1.7#CLOUD
+
+// TODO:
+// users
+// groups
+// bookmarks
+// sharing
+// versioning
+// news (rss)
+
+
+
+		}else{
+			$txt='Invalid query, please check the syntax. API specifications are here: http://www.freedesktop.org/wiki/Specifications/open-collaboration-services. DEBUG OUTPUT:'."\n";
+			$txt.=OC_OCS::getdebugoutput();
+			echo(OC_OCS::generatexml($format,'failed',999,$txt));
+		}
+		exit();
+	}
+
+	/**
+	* generated some debug information to make it easier to find faild API calls
+	* @return debug data string
+	*/
+	private static function getDebugOutput() {
+		$txt='';
+		$txt.="debug output:\n";
+		if(isset($_SERVER['REQUEST_METHOD'])) $txt.='http request method: '.$_SERVER['REQUEST_METHOD']."\n";
+		if(isset($_SERVER['REQUEST_URI'])) $txt.='http request uri: '.$_SERVER['REQUEST_URI']."\n";
+		if(isset($_GET)) foreach($_GET as $key=>$value) $txt.='get parameter: '.$key.'->'.$value."\n";
+		if(isset($_POST)) foreach($_POST as $key=>$value) $txt.='post parameter: '.$key.'->'.$value."\n";
+		return($txt);
+	}
+
+	/**
+	* checks if the user is authenticated
+	* checks the IP whitlist, apikeys and login/password combination
+	* if $forceuser is true and the authentication failed it returns an 401 http response.
+	* if $forceuser is false and authentification fails it returns an empty username string
+	* @param bool $forceuser
+	* @return username string
+	*/
+	private static function checkPassword($forceuser=true) {
+		//valid user account ?
+		if(isset($_SERVER['PHP_AUTH_USER'])) $authuser=$_SERVER['PHP_AUTH_USER']; else $authuser='';
+		if(isset($_SERVER['PHP_AUTH_PW']))   $authpw=$_SERVER['PHP_AUTH_PW']; else $authpw='';
+
+		if(empty($authuser)) {
+			if($forceuser){
+				header('WWW-Authenticate: Basic realm="your valid user account or api key"');
+				header('HTTP/1.0 401 Unauthorized');
+				exit;
+			}else{
+				$identifieduser='';
+			}
+		}else{
+			if(!OC_User::login($authuser,$authpw)){
+				if($forceuser){
+					header('WWW-Authenticate: Basic realm="your valid user account or api key"');
+					header('HTTP/1.0 401 Unauthorized');
+					exit;
+				}else{
+					$identifieduser='';
+				}
+			}else{
+				$identifieduser=$authuser;
+			}
+		}
+
+		return($identifieduser);
+	}
+
+
+	/**
+	* generates the xml or json response for the API call from an multidimenional data array.
+	* @param string $format
+	* @param string $status
+	* @param string $statuscode
+	* @param string $message
+	* @param array $data
+	* @param string $tag
+	* @param string $tagattribute
+	* @param int $dimension
+	* @param int $itemscount
+	* @param int $itemsperpage
+	* @return string xml/json
+	*/
+	private static function generateXml($format,$status,$statuscode,$message,$data=array(),$tag='',$tagattribute='',$dimension=-1,$itemscount='',$itemsperpage='') {
+		if($format=='json') {
+			$json=array();
+			$json['status']=$status;
+			$json['statuscode']=$statuscode;
+			$json['message']=$message;
+			$json['totalitems']=$itemscount;
+			$json['itemsperpage']=$itemsperpage;
+			$json['data']=$data;
+			return(json_encode($json));
+		}else{
+			$txt='';
+			$writer = xmlwriter_open_memory();
+			xmlwriter_set_indent( $writer, 2 );
+			xmlwriter_start_document($writer );
+			xmlwriter_start_element($writer,'ocs');
+			xmlwriter_start_element($writer,'meta');
+			xmlwriter_write_element($writer,'status',$status);
+			xmlwriter_write_element($writer,'statuscode',$statuscode);
+			xmlwriter_write_element($writer,'message',$message);
+			if($itemscount<>'') xmlwriter_write_element($writer,'totalitems',$itemscount);
+			if(!empty($itemsperpage)) xmlwriter_write_element($writer,'itemsperpage',$itemsperpage);
+			xmlwriter_end_element($writer);
+			if($dimension=='0') {
+				// 0 dimensions
+				xmlwriter_write_element($writer,'data',$data);
+
+			}elseif($dimension=='1') {
+				xmlwriter_start_element($writer,'data');
+				foreach($data as $key=>$entry) {
+				xmlwriter_write_element($writer,$key,$entry);
+				}
+				xmlwriter_end_element($writer);
+
+			}elseif($dimension=='2') {
+				xmlwriter_start_element($writer,'data');
+				foreach($data as $entry) {
+				xmlwriter_start_element($writer,$tag);
+				if(!empty($tagattribute)) {
+				xmlwriter_write_attribute($writer,'details',$tagattribute);
+				}
+				foreach($entry as $key=>$value) {
+				if(is_array($value)){
+				foreach($value as $k=>$v) {
+					xmlwriter_write_element($writer,$k,$v);
+				}
+				} else {
+				xmlwriter_write_element($writer,$key,$value);
+				}
+				}
+				xmlwriter_end_element($writer);
+				}
+				xmlwriter_end_element($writer);
+
+			}elseif($dimension=='3') {
+				xmlwriter_start_element($writer,'data');
+				foreach($data as $entrykey=>$entry) {
+				xmlwriter_start_element($writer,$tag);
+				if(!empty($tagattribute)) {
+				xmlwriter_write_attribute($writer,'details',$tagattribute);
+				}
+				foreach($entry as $key=>$value) {
+				if(is_array($value)){
+				xmlwriter_start_element($writer,$entrykey);
+				foreach($value as $k=>$v) {
+					xmlwriter_write_element($writer,$k,$v);
+				}
+				xmlwriter_end_element($writer);
+				} else {
+				xmlwriter_write_element($writer,$key,$value);
+				}
+				}
+				xmlwriter_end_element($writer);
+				}
+				xmlwriter_end_element($writer);
+			}elseif($dimension=='dynamic') {
+				xmlwriter_start_element($writer,'data');
+				OC_OCS::toxml($writer,$data,'comment');
+				xmlwriter_end_element($writer);
+			}
+
+			xmlwriter_end_element($writer);
+
+			xmlwriter_end_document( $writer );
+			$txt.=xmlwriter_output_memory( $writer );
+			unset($writer);
+			return($txt);
+		}
+	}
+
+	public static function toXml($writer,$data,$node) {
+		foreach($data as $key => $value) {
+			if (is_numeric($key)) {
+				$key = $node;
+			}
+			if (is_array($value)){
+				xmlwriter_start_element($writer,$key);
+				OC_OCS::toxml($writer,$value,$node);
+				xmlwriter_end_element($writer);
+			}else{
+				xmlwriter_write_element($writer,$key,$value);
+			}
+		}
+	}
+
+
+
+
+	/**
+	* return the config data of this server
+	* @param string $format
+	* @return string xml/json
+	*/
+	private static function apiConfig($format) {
+		$user=OC_OCS::checkpassword(false);
+		$url=substr(OCP\Util::getServerHost().$_SERVER['SCRIPT_NAME'],0,-11).'';
+
+		$xml['version']='1.7';
+		$xml['website']='ownCloud';
+		$xml['host']=OCP\Util::getServerHost();
+		$xml['contact']='';
+		$xml['ssl']='false';
+		echo(OC_OCS::generatexml($format,'ok',100,'',$xml,'config','',1));
+	}
+
+
+	/**
+	* check if the provided login/apikey/password is valid
+	* @param string $format
+	* @param string $login
+	* @param string $passwd
+	* @return string xml/json
+	*/
+	private static function personCheck($format,$login,$passwd) {
+		if($login<>''){
+			if(OC_User::login($login,$passwd)){
+				$xml['person']['personid']=$login;
+				echo(OC_OCS::generatexml($format,'ok',100,'',$xml,'person','check',2));
+			}else{
+				echo(OC_OCS::generatexml($format,'failed',102,'login not valid'));
+			}
+		}else{
+			echo(OC_OCS::generatexml($format,'failed',101,'please specify all mandatory fields'));
+		}
+	}
+
+
+
+	// ACTIVITY API #############################################
+
+	/**
+	* get my activities
+	* @param string $format
+	* @param string $page
+	* @param string $pagesize
+	* @return string xml/json
+	*/
+	private static function activityGet($format,$page,$pagesize) {
+		$user=OC_OCS::checkpassword();
+
+			//TODO
+
+		$txt=OC_OCS::generatexml($format,'ok',100,'',$xml,'activity','full',2,$totalcount,$pagesize);
+		echo($txt);
+	}
+
+	/**
+	* submit a activity
+	* @param string $format
+	* @param string $message
+	* @return string xml/json
+	*/
+	private static function activityPut($format,$message) {
+		// not implemented in ownCloud
+		$user=OC_OCS::checkpassword();
+		echo(OC_OCS::generatexml($format,'ok',100,''));
+	}
+
+	// PRIVATEDATA API #############################################
+
+	/**
+	* get private data and create the xml for ocs
+	* @param string $format
+	* @param string $app
+	* @param string $key
+	* @return string xml/json
+	*/
+	private static function privateDataGet($format,$app="",$key="") {
+		$user=OC_OCS::checkpassword();
+		$result=OC_OCS::getData($user,$app,$key);
+		$xml=array();
+		foreach($result as $i=>$log) {
+			$xml[$i]['key']=$log['key'];
+			$xml[$i]['app']=$log['app'];
+			$xml[$i]['value']=$log['value'];
+		}
+
+
+		$txt=OC_OCS::generatexml($format, 'ok', 100, '', $xml, 'privatedata', 'full', 2, count($xml), 0);//TODO: replace 'privatedata' with 'attribute' once a new libattice has been released that works with it
+		echo($txt);
+	}
+
+	/**
+	* set private data referenced by $key to $value and generate the xml for ocs
+	* @param string $format
+	* @param string $app
+	* @param string $key
+	* @param string $value
+	* @return string xml/json
+	*/
 	private static function privateDataSet($format, $app, $key, $value) {
 		$user=OC_OCS::checkpassword();
 		if(OC_OCS::setData($user,$app,$key,$value)){
@@ -529,4 +555,134 @@ class OC_OCS {
 	public static function deleteData($user, $app, $key) {
 		return OC_Preferences::deleteKey($user,$app,$key);
 	}
+
+
+        // CLOUD API #############################################
+
+        /**
+        * get a list of installed web apps
+        * @param string $format
+        * @return string xml/json
+        */
+        private static function systemWebApps($format) {
+                $login=OC_OCS::checkpassword();
+		$apps=OC_App::getEnabledApps();
+		$values=array();
+		foreach($apps as $app) {
+			$info=OC_App::getAppInfo($app);
+			if(isset($info['standalone'])) {
+				$newvalue=array('name'=>$info['name'],'url'=>OC_Helper::linkToAbsolute($app,''),'icon'=>'');
+				$values[]=$newvalue;
+			}
+
+		}
+		$txt=OC_OCS::generatexml($format, 'ok', 100, '', $values, 'cloud', '', 2, 0, 0);
+		echo($txt);
+
+        }
+
+
+        /**
+        * get the quota of a user
+        * @param string $format
+        * @param string $user
+        * @return string xml/json
+        */
+        private static function quotaGet($format,$user) {
+                $login=OC_OCS::checkpassword();
+		if(OC_Group::inGroup($login, 'admin') or ($login==$user)) {
+
+			if(OC_User::userExists($user)){
+				// calculate the disc space
+				$user_dir = '/'.$user.'/files';
+				OC_Filesystem::init($user_dir);
+				$rootInfo=OC_FileCache::get('');
+				$sharedInfo=OC_FileCache::get('/Shared');
+				$used=$rootInfo['size']-$sharedInfo['size'];
+				$free=OC_Filesystem::free_space();
+				$total=$free+$used;
+				if($total==0) $total=1;  // prevent division by zero
+				$relative=round(($used/$total)*10000)/100;
+
+				$xml=array();
+				$xml['quota']=$total;
+				$xml['free']=$free;
+				$xml['used']=$used;
+				$xml['relative']=$relative;
+
+				$txt=OC_OCS::generatexml($format, 'ok', 100, '', $xml, 'cloud', '', 1, 0, 0);
+				echo($txt);
+			}else{
+				echo self::generateXml('', 'fail', 300, 'User does not exist');
+			}
+		}else{
+			echo self::generateXml('', 'fail', 300, 'You don´t have permission to access this ressource.');
+		}
+        }
+
+        /**
+        * set the quota of a user
+        * @param string $format
+        * @param string $user
+        * @param string $quota
+        * @return string xml/json
+        */
+        private static function quotaSet($format,$user,$quota) {
+                $login=OC_OCS::checkpassword();
+                if(OC_Group::inGroup($login, 'admin')) {
+
+			// todo
+			// not yet implemented
+			// add logic here
+			error_log('OCS call: user:'.$user.' quota:'.$quota);
+
+                        $xml=array();
+                        $txt=OC_OCS::generatexml($format, 'ok', 100, '', $xml, 'cloud', '', 1, 0, 0);
+                        echo($txt);
+                }else{
+                        echo self::generateXml('', 'fail', 300, 'You don´t have permission to access this ressource.');
+                }
+        }
+
+        /**
+        * get the public key of a user
+        * @param string $format
+        * @param string $user
+        * @return string xml/json
+        */
+        private static function publicKeyGet($format,$user) {
+                $login=OC_OCS::checkpassword();
+
+		if(OC_User::userExists($user)){
+			// calculate the disc space
+			$txt='this is the public key of '.$user;
+			echo($txt);
+		}else{
+			echo self::generateXml('', 'fail', 300, 'User does not exist');
+		}
+	}
+
+        /**
+        * get the private key of a user
+        * @param string $format
+        * @param string $user
+        * @return string xml/json
+        */
+        private static function privateKeyGet($format,$user) {
+                $login=OC_OCS::checkpassword();
+                if(OC_Group::inGroup($login, 'admin') or ($login==$user)) {
+
+                        if(OC_User::userExists($user)){
+                                // calculate the disc space
+                                $txt='this is the private key of '.$user;
+                                echo($txt);
+                        }else{
+                                echo self::generateXml('', 'fail', 300, 'User does not exist');
+                        }
+                }else{
+                        echo self::generateXml('', 'fail', 300, 'You don´t have permission to access this ressource.');
+                }
+        }
+
+
 }
diff --git a/lib/ocsclient.php b/lib/ocsclient.php
index 951d761d7e6..ae35470cff6 100644
--- a/lib/ocsclient.php
+++ b/lib/ocsclient.php
@@ -71,7 +71,7 @@ class OC_OCSClient{
 		$tmp=$data->data;
 		$cats=array();
 
-		foreach($tmp->category as $key=>$value) {
+		foreach($tmp->category as $value) {
 
 			$id= (int) $value->id;
 			$name= (string) $value->name;
diff --git a/lib/preferences.php b/lib/preferences.php
index f72378ce94f..c91423e69bc 100644
--- a/lib/preferences.php
+++ b/lib/preferences.php
@@ -165,7 +165,7 @@ class OC_Preferences{
 	public static function deleteKey( $user, $app, $key ){
 		// No need for more comments
 		$query = OC_DB::prepare( 'DELETE FROM *PREFIX*preferences WHERE userid = ? AND appid = ? AND configkey = ?' );
-		$result = $query->execute( array( $user, $app, $key ));
+		$query->execute( array( $user, $app, $key ));
 
 		return true;
 	}
@@ -181,7 +181,7 @@ class OC_Preferences{
 	public static function deleteApp( $user, $app ){
 		// No need for more comments
 		$query = OC_DB::prepare( 'DELETE FROM *PREFIX*preferences WHERE userid = ? AND appid = ?' );
-		$result = $query->execute( array( $user, $app ));
+		$query->execute( array( $user, $app ));
 
 		return true;
 	}
@@ -196,7 +196,7 @@ class OC_Preferences{
 	public static function deleteUser( $user ){
 		// No need for more comments
 		$query = OC_DB::prepare( 'DELETE FROM *PREFIX*preferences WHERE userid = ?' );
-		$result = $query->execute( array( $user ));
+		$query->execute( array( $user ));
 
 		return true;
 	}
@@ -211,7 +211,7 @@ class OC_Preferences{
 	public static function deleteAppFromAllUsers( $app ){
 		// No need for more comments
 		$query = OC_DB::prepare( 'DELETE FROM *PREFIX*preferences WHERE appid = ?' );
-		$result = $query->execute( array( $app ));
+		$query->execute( array( $app ));
 
 		return true;
 	}
diff --git a/lib/public/app.php b/lib/public/app.php
index 38c51af9cdb..28411933beb 100644
--- a/lib/public/app.php
+++ b/lib/public/app.php
@@ -34,28 +34,6 @@ namespace OCP;
  * This class provides functions to manage apps in ownCloud
  */
 class App {
-
-        /**
-         * @brief Makes owncloud aware of this app
-         * @brief This call is deprecated and not necessary to use.
-         * @param $data array with all information
-         * @returns true/false
-         *
-         * This function registers the application. $data is an associative array.
-         * The following keys are required:
-         *   - id: id of the application, has to be unique ('addressbook')
-         *   - name: Human readable name ('Addressbook')
-         *   - version: array with Version (major, minor, bugfix) ( array(1, 0, 2))
-         *
-         * The following keys are optional:
-         *   - order: integer, that influences the position of your application in
-         *     a list of applications. Lower values come first.
-         *
-         */
-        public static function register( $data ){
-        }
-
-
         /**
          * @brief adds an entry to the navigation
          * @param $data array containing the data
diff --git a/lib/public/groupinterface.php b/lib/public/groupinterface.php
new file mode 100644
index 00000000000..97833028118
--- /dev/null
+++ b/lib/public/groupinterface.php
@@ -0,0 +1,31 @@
+<?php
+/**
+* ownCloud
+*
+* @author Arthur Schiwon
+* @copyright 2012 Arthur Schiwon blizzz@owncloud.org
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+* License as published by the Free Software Foundation; either
+* version 3 of the License, or any later version.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+*
+* You should have received a copy of the GNU Affero General Public
+* License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+*
+*/
+
+/**
+ * Public interface of ownCloud for apps to use.
+ * Group Class.
+ *
+ */
+
+namespace OCP;
+
+interface GroupInterface extends \OC_Group_Interface {}
\ No newline at end of file
diff --git a/lib/public/json.php b/lib/public/json.php
index 1bc1e3ab4d5..99df79173eb 100644
--- a/lib/public/json.php
+++ b/lib/public/json.php
@@ -35,70 +35,137 @@ namespace OCP;
  */
 class JSON {
 
-
 	/**
 	* @brief Encode and print $data in JSON format
 	* @param array $data The data to use
 	* @param string $setContentType the optional content type
+	* @return string json formatted string.
 	*/
 	public static function encodedPrint( $data, $setContentType=true ){
 		return(\OC_JSON::encodedPrint( $data, $setContentType ));
 	}
 
-
 	/**
-	* @brief Check if the user is logged in, send json error msg if not
+	* Check if the user is logged in, send json error msg if not.
+	* 
+	* This method checks if a user is logged in. If not, a json error
+	* response will be return and the method will exit from execution
+	* of the script.
+	* The returned json will be in the format:
+	* 
+	*     {"status":"error","data":{"message":"Authentication error."}}
+	* 
+	* Add this call to the start of all ajax method files that requires
+	* an authenticated user.
+	* 
+	* @return string json formatted error string if not authenticated.
 	*/
 	public static function checkLoggedIn(){
 		return(\OC_JSON::checkLoggedIn());
 	}
 
 	/**
-	 * @brief Check an ajax get/post call if the request token is valid.
-	 * @return json Error msg if not valid.
-	 */
+	* Check an ajax get/post call if the request token is valid.
+	* 
+	* This method checks for a valid variable 'requesttoken' in $_GET,
+	* $_POST and $_SERVER. If a valid token is not found, a json error
+	* response will be return and the method will exit from execution
+	* of the script.
+	* The returned json will be in the format:
+	* 
+	*     {"status":"error","data":{"message":"Token expired. Please reload page."}}
+	* 
+	* Add this call to the start of all ajax method files that creates, 
+	* updates or deletes anything.
+	* In cases where you e.g. use an ajax call to load a dialog containing
+	* a submittable form, you will need to add the requesttoken first as a
+	* parameter to the ajax call, then assign it to the template and finally
+	* add a hidden input field also named 'requesttoken' containing the value.
+	* 
+	* @return string json formatted error string if not valid.
+	*/
 	public static function callCheck(){
 		return(\OC_JSON::callCheck());
 	}
 
 	/**
-	* @brief Send json success msg
+	* Send json success msg
+	* 
+	* Return a json success message with optional extra data.
+	* @see OCP\JSON::error() 		for the format to use.
+	* 
 	* @param array $data The data to use
+	* @return string json formatted string.
 	*/
 	public static function success( $data = array() ){
 		return(\OC_JSON::success( $data ));
 	}
 
-
 	/**
-	* @brief Send json error msg
+	* Send json error msg
+	* 
+	* Return a json error message with optional extra data for 
+	* error message or app specific data.
+	* 
+	* Example use:
+	* 
+	*     $id = [some value]
+	*     OCP\JSON::error(array('data':array('message':'An error happened', 'id': $id)));
+	* 
+	* Will return the json formatted string:
+	* 
+	*     {"status":"error","data":{"message":"An error happened", "id":[some value]}}
+	* 
 	* @param array $data The data to use
+	* @return string json formatted error string.
 	*/
 	public static function error( $data = array() ){
 		return(\OC_JSON::error( $data ));
 	}
 
-
 	/**
-	 * @brief set Content-Type header to jsonrequest
-	 * @param array $type The contwnt type header
-	 */
+	* @brief set Content-Type header to jsonrequest
+	* @param array $type The contwnt type header
+	* @return string json formatted string.
+	*/
 	public static function setContentTypeHeader( $type='application/json' ){
 		return(\OC_JSON::setContentTypeHeader( $type ));
 	}
 
-
 	/**
-	 * @brief Check if the App is enabled and send JSON error message instead
-	 * @param string $app The app to check
-	 */
+	* Check if the App is enabled and send JSON error message instead
+	* 
+	* This method checks if a specific app is enabled. If not, a json error
+	* response will be return and the method will exit from execution
+	* of the script.
+	* The returned json will be in the format:
+	* 
+	*     {"status":"error","data":{"message":"Application is not enabled."}}
+	* 
+	* Add this call to the start of all ajax method files that requires
+	* a specific app to be enabled.
+	* 
+	* @param string $app The app to check
+	* @return string json formatted string if not enabled.
+	*/
 	public static function checkAppEnabled( $app ){
 		return(\OC_JSON::checkAppEnabled( $app ));
 	}
 
-
 	/**
-	* @brief Check if the user is a admin, send json error msg if not
+	* Check if the user is a admin, send json error msg if not
+	* 
+	* This method checks if the current user has admin rights. If not, a json error
+	* response will be return and the method will exit from execution
+	* of the script.
+	* The returned json will be in the format:
+	* 
+	*     {"status":"error","data":{"message":"Authentication error."}}
+	* 
+	* Add this call to the start of all ajax method files that requires
+	* administrative rights.
+	* 
+	* @return string json formatted string if not admin user.
 	*/
 	public static function checkAdminUser(){
 		return(\OC_JSON::checkAdminUser());
diff --git a/lib/public/userinterface.php b/lib/public/userinterface.php
new file mode 100644
index 00000000000..b73a8f8d8b0
--- /dev/null
+++ b/lib/public/userinterface.php
@@ -0,0 +1,31 @@
+<?php
+/**
+* ownCloud
+*
+* @author Arthur Schiwon
+* @copyright 2012 Arthur Schiwon blizzz@owncloud.org
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+* License as published by the Free Software Foundation; either
+* version 3 of the License, or any later version.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+*
+* You should have received a copy of the GNU Affero General Public
+* License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+*
+*/
+
+/**
+ * Public interface of ownCloud for apps to use.
+ * User Class.
+ *
+ */
+
+namespace OCP;
+
+interface UserInterface extends \OC_User_Interface {}
\ No newline at end of file
diff --git a/lib/public/util.php b/lib/public/util.php
index 43f9e3cee5d..75ca29f7129 100644
--- a/lib/public/util.php
+++ b/lib/public/util.php
@@ -320,4 +320,15 @@ class Util {
 	public static function mb_str_replace($search, $replace, $subject, $encoding = 'UTF-8', &$count = null) {
 		return(\OC_Helper::mb_str_replace($search, $replace, $subject, $encoding, $count));
 	}
+
+	/**
+	* @brief performs a search in a nested array
+	* @param haystack the array to be searched
+	* @param needle the search string
+	* @param $index optional, only search this key name
+	* @return the key of the matching field, otherwise false
+	*/
+	public static function recursiveArraySearch($haystack, $needle, $index = null) {
+		return(\OC_Helper::recursiveArraySearch($haystack, $needle, $index));
+	}
 }
diff --git a/lib/search/provider.php b/lib/search/provider.php
index 838ab696d04..b3ee79b4770 100644
--- a/lib/search/provider.php
+++ b/lib/search/provider.php
@@ -2,13 +2,17 @@
 /**
  * provides search functionalty
  */
-class OC_Search_Provider {
-	public function __construct($options){}
+abstract class OC_Search_Provider {
+	private $options;
+	
+	public function __construct($options){
+		$this->options=$options;
+	}
 	
 	/**
 	 * search for $query
 	 * @param string $query
 	 * @return array An array of OC_Search_Result's
 	 */
-	public function search($query){}
+	abstract public function search($query);
 }
diff --git a/lib/setup.php b/lib/setup.php
index 2f73c486c9c..4d71bed86e2 100644
--- a/lib/setup.php
+++ b/lib/setup.php
@@ -102,7 +102,6 @@ class OC_Setup {
 				}
 				else {
 					$oldUser=OC_Config::getValue('dbuser', false);
-					$oldPassword=OC_Config::getValue('dbpassword', false);
 					
 					$query="SELECT user FROM mysql.user WHERE user='$dbuser'"; //this should be enough to check for admin rights in mysql
 					if(mysql_query($query, $connection)) {
@@ -257,7 +256,7 @@ class OC_Setup {
 				OC_Installer::installShippedApps();
 
 				//create htaccess files for apache hosts
-				if (strstr($_SERVER['SERVER_SOFTWARE'], 'Apache')) {
+				if (isset($_SERVER['SERVER_SOFTWARE']) && strstr($_SERVER['SERVER_SOFTWARE'], 'Apache')) {
 					self::createHtaccess();
 				}
 
diff --git a/lib/streamwrappers.php b/lib/streamwrappers.php
index f1e0fa0e1d9..f502c6170bd 100644
--- a/lib/streamwrappers.php
+++ b/lib/streamwrappers.php
@@ -1,6 +1,4 @@
 <?php
-global $FAKEDIRS;
-$FAKEDIRS=array();
 
 class OC_FakeDirStream{
 	public static $dirs=array();
@@ -8,8 +6,6 @@ class OC_FakeDirStream{
 	private $index;
 
 	public function dir_opendir($path,$options){
-		global $FAKEDIRS;
-		$url=parse_url($path);
 		$this->name=substr($path,strlen('fakedir://'));
 		$this->index=0;
 		if(!isset(self::$dirs[$this->name])){
@@ -161,7 +157,6 @@ class OC_StaticStreamWrapper {
 	public function stream_write($data) {
 		if (!$this->writable) return 0;
 		$size = strlen($data);
-		$len = strlen(self::$data[$this->path]);
 		if ($this->stream_eof()) {
 			self::$data[$this->path] .= $data;
 		} else {
diff --git a/lib/template.php b/lib/template.php
index 3b48c27b9b4..5b6999af533 100644
--- a/lib/template.php
+++ b/lib/template.php
@@ -82,7 +82,6 @@ function relative_modified_date($timestamp) {
 	$diffhours = round($diffminutes/60);
 	$diffdays = round($diffhours/24);
 	$diffmonths = round($diffdays/31);
-	$diffyears = round($diffdays/365);
 
 	if($timediff < 60) { return $l->t('seconds ago'); }
 	else if($timediff < 120) { return $l->t('1 minute ago'); }
diff --git a/lib/templatelayout.php b/lib/templatelayout.php
index d33a87e9e4c..588a7845997 100644
--- a/lib/templatelayout.php
+++ b/lib/templatelayout.php
@@ -123,7 +123,7 @@ class OC_TemplateLayout extends OC_Template {
 					elseif(self::appendIfExist($files, $apps_dir['path'], $apps_dir['url'], "$style.css")) { $append =true; break; }
 				}
 				if(! $append) {
-					echo('css file not found: style:'.$script.' formfactor:'.$fext.' webroot:'.OC::$WEBROOT.' serverroot:'.OC::$SERVERROOT);
+					echo('css file not found: style:'.$style.' formfactor:'.$fext.' webroot:'.OC::$WEBROOT.' serverroot:'.OC::$SERVERROOT);
 					die();
 				}
 			}
diff --git a/lib/user.php b/lib/user.php
index f1903093d6d..e3c9c23effa 100644
--- a/lib/user.php
+++ b/lib/user.php
@@ -21,7 +21,7 @@
  */
 
 /**
- * This class provides wrapper methods for user management. Multiple backends are 
+ * This class provides wrapper methods for user management. Multiple backends are
  * supported. User management operations are delegated to the configured backend for
  * execution.
  *
@@ -50,8 +50,8 @@ class OC_User {
 	 *
 	 * Makes a list of backends that can be used by other modules
 	 */
-	public static function registerBackend( $name ){
-		self::$_backends[] = $name;
+	public static function registerBackend( $backend ){
+		self::$_backends[] = $backend;
 		return true;
 	}
 
@@ -83,28 +83,38 @@ class OC_User {
 	 * Set the User Authentication Module
 	 */
 	public static function useBackend( $backend = 'database' ){
-		// You'll never know what happens
-		if( null === $backend OR !is_string( $backend )){
-			$backend = 'database';
-		}
+		if($backend instanceof OC_User_Interface){
+			self::$_usedBackends[get_class($backend)]=$backend;
+		}else{
+			// You'll never know what happens
+			if( null === $backend OR !is_string( $backend )){
+				$backend = 'database';
+			}
 
-		// Load backend
-		switch( $backend ){
-			case 'database':
-			case 'mysql':
-			case 'sqlite':
-				self::$_usedBackends[$backend] = new OC_User_Database();
-				break;
-			default:
-				$className = 'OC_USER_' . strToUpper($backend);
-				self::$_usedBackends[$backend] = new $className();
-				break;
+			// Load backend
+			switch( $backend ){
+				case 'database':
+				case 'mysql':
+				case 'sqlite':
+					self::$_usedBackends[$backend] = new OC_User_Database();
+					break;
+				default:
+					$className = 'OC_USER_' . strToUpper($backend);
+					self::$_usedBackends[$backend] = new $className();
+					break;
+			}
 		}
-
 		true;
 	}
 
 	/**
+	 * remove all used backends
+	 */
+	public static function clearBackends(){
+		self::$_usedBackends=array();
+	}
+
+	/**
 	 * @brief Create a new user
 	 * @param $uid The username of the user to create
 	 * @param $password The password of the new user
@@ -200,7 +210,7 @@ class OC_User {
 		if( $run ){
 			$uid=self::checkPassword( $uid, $password );
 			if($uid){
-				session_regenerate_id();
+				session_regenerate_id(true);
 				self::setUserId($uid);
 				OC_Hook::emit( "OC_User", "post_login", array( "uid" => $uid, 'password'=>$password ));
 				return true;
diff --git a/lib/user/backend.php b/lib/user/backend.php
index be068a63ce0..daa942d261c 100644
--- a/lib/user/backend.php
+++ b/lib/user/backend.php
@@ -42,7 +42,7 @@ define('OC_USER_BACKEND_CHECK_PASSWORD',    0x000100);
  *
  * Subclass this for your own backends, and see OC_User_Example for descriptions
  */
-abstract class OC_User_Backend {
+abstract class OC_User_Backend implements OC_User_Interface {
 
 	protected $possibleActions = array(
 		OC_USER_BACKEND_CREATE_USER => 'createUser',
diff --git a/lib/user/database.php b/lib/user/database.php
index a48b8357d64..cc27b3ddbfd 100644
--- a/lib/user/database.php
+++ b/lib/user/database.php
@@ -39,7 +39,6 @@ require_once 'phpass/PasswordHash.php';
  * Class for user management in a SQL Database (e.g. MySQL, SQLite)
  */
 class OC_User_Database extends OC_User_Backend {
-	static private $userGroupCache=array();
 	/**
 	 * @var PasswordHash
 	 */
@@ -87,7 +86,7 @@ class OC_User_Database extends OC_User_Backend {
 	public function deleteUser( $uid ){
 		// Delete user-group-relation
 		$query = OC_DB::prepare( "DELETE FROM `*PREFIX*users` WHERE uid = ?" );
-		$result = $query->execute( array( $uid ));
+		$query->execute( array( $uid ));
 		return true;
 	}
 
@@ -104,11 +103,10 @@ class OC_User_Database extends OC_User_Backend {
 			$hasher=$this->getHasher();
 			$hash = $hasher->HashPassword($password.OC_Config::getValue('passwordsalt', ''));
 			$query = OC_DB::prepare( "UPDATE *PREFIX*users SET password = ? WHERE uid = ?" );
-			$result = $query->execute( array( $hash, $uid ));
+			$query->execute( array( $hash, $uid ));
 
 			return true;
-		}
-		else{
+		}else{
 			return false;
 		}
 	}
diff --git a/lib/user/example.php b/lib/user/example.php
index 7f3fd1b8578..77246d8136c 100644
--- a/lib/user/example.php
+++ b/lib/user/example.php
@@ -35,9 +35,7 @@ abstract class OC_User_Example extends OC_User_Backend {
 		* Creates a new user. Basic checking of username is done in OC_User
 		* itself, not in its subclasses.
 		*/
-	public function createUser($uid, $password){
-		return OC_USER_BACKEND_NOT_IMPLEMENTED;
-	}
+	abstract public function createUser($uid, $password);
 
 	/**
 		* @brief Set password
@@ -47,9 +45,7 @@ abstract class OC_User_Example extends OC_User_Backend {
 		*
 		* Change the password of a user
 		*/
-	public function setPassword($uid, $password){
-		return OC_USER_BACKEND_NOT_IMPLEMENTED;
-	}
+	abstract public function setPassword($uid, $password);
 
 	/**
 		* @brief Check if the password is correct
@@ -60,7 +56,5 @@ abstract class OC_User_Example extends OC_User_Backend {
 		* Check if the password is correct without logging in the user
 		* returns the user id or false
 		*/
-	public function checkPassword($uid, $password){
-		return OC_USER_BACKEND_NOT_IMPLEMENTED;
-	}
+	abstract public function checkPassword($uid, $password);
 }
diff --git a/lib/user/interface.php b/lib/user/interface.php
new file mode 100644
index 00000000000..dc3685dc20d
--- /dev/null
+++ b/lib/user/interface.php
@@ -0,0 +1,60 @@
+<?php
+
+/**
+ * ownCloud - user interface
+ *
+ * @author Arthur Schiwon
+ * @copyright 2012 Arthur Schiwon blizzz@owncloud.org
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+interface OC_User_Interface {
+
+	/**
+	* @brief Check if backend implements actions
+	* @param $actions bitwise-or'ed actions
+	* @returns boolean
+	*
+	* Returns the supported actions as int to be
+	* compared with OC_USER_BACKEND_CREATE_USER etc.
+	*/
+	public function implementsActions($actions);
+
+	/**
+	* @brief delete a user
+	* @param $uid The username of the user to delete
+	* @returns true/false
+	*
+	* Deletes a user
+	*/
+	public function deleteUser($uid);
+
+	/**
+	* @brief Get a list of all users
+	* @returns array with all uids
+	*
+	* Get a list of all users.
+	*/
+	public function getUsers();
+
+	/**
+	* @brief check if a user exists
+	* @param string $uid the username
+	* @return boolean
+	*/
+	public function userExists($uid);
+
+}
\ No newline at end of file
diff --git a/lib/util.php b/lib/util.php
index 2a7b8a922f9..0c563278cc5 100755
--- a/lib/util.php
+++ b/lib/util.php
@@ -77,13 +77,13 @@ class OC_Util {
 		return '5 pre alpha';
 	}
 
-        /**
-         * get the current installed edition of ownCloud. There is the community edition that just returns an empty string and the enterprise edition that returns "Enterprise".
-         * @return string
-         */
-        public static function getEditionString(){
-                return '';
-        }
+	/**
+	 * get the current installed edition of ownCloud. There is the community edition that just returns an empty string and the enterprise edition that returns "Enterprise".
+	 * @return string
+	 */
+	public static function getEditionString(){
+			return '';
+	}
 
 	/**
 	 * add a javascript file
@@ -131,12 +131,12 @@ class OC_Util {
 		self::$headers[]=array('tag'=>$tag,'attributes'=>$attributes,'text'=>$text);
 	}
 
-   /**
-     * formats a timestamp in the "right" way
-     *
-     * @param int timestamp $timestamp
-     * @param bool dateOnly option to ommit time from the result
-     */
+	/**
+	 * formats a timestamp in the "right" way
+	 *
+	 * @param int timestamp $timestamp
+	 * @param bool dateOnly option to ommit time from the result
+	 */
     public static function formatDate( $timestamp,$dateOnly=false){
 		if(isset($_SESSION['timezone'])){//adjust to clients timezone if we know it
 			$systemTimeZone = intval(date('O'));
@@ -189,8 +189,6 @@ class OC_Util {
 		if(!(is_callable('sqlite_open') or class_exists('SQLite3')) and !is_callable('mysql_connect') and !is_callable('pg_connect')){
 			$errors[]=array('error'=>'No database drivers (sqlite, mysql, or postgresql) installed.<br/>','hint'=>'');//TODO: sane hint
 		}
-		$CONFIG_DBTYPE = OC_Config::getValue( "dbtype", "sqlite" );
-		$CONFIG_DBNAME = OC_Config::getValue( "dbname", "owncloud" );
 
 		//common hint for all file permissons error messages
 		$permissionsHint="Permissions can usually be fixed by giving the webserver write access to the ownCloud directory";
@@ -440,26 +438,25 @@ class OC_Util {
 	}
 
 
-        /**
-         * Check if the htaccess file is working by creating a test file in the data directory and trying to access via http
-         */
-        public static function ishtaccessworking() {
-
+	/**
+	 * Check if the htaccess file is working by creating a test file in the data directory and trying to access via http
+	 */
+	public static function ishtaccessworking() {
 		// testdata
 		$filename='/htaccesstest.txt';
 		$testcontent='testcontent';
 
 		// creating a test file
-                $testfile = OC_Config::getValue( "datadirectory", OC::$SERVERROOT."/data" ).'/'.$filename;
-                $fp = @fopen($testfile, 'w');
-                @fwrite($fp, $testcontent);
-                @fclose($fp);
+		$testfile = OC_Config::getValue( "datadirectory", OC::$SERVERROOT."/data" ).'/'.$filename;
+		$fp = @fopen($testfile, 'w');
+		@fwrite($fp, $testcontent);
+		@fclose($fp);
 
 		// accessing the file via http
-                $url = OC_Helper::serverProtocol(). '://'  . OC_Helper::serverHost() . OC::$WEBROOT.'/data'.$filename;
-                $fp = @fopen($url, 'r');
-                $content=@fread($fp, 2048);
-                @fclose($fp);
+		$url = OC_Helper::serverProtocol(). '://'  . OC_Helper::serverHost() . OC::$WEBROOT.'/data'.$filename;
+		$fp = @fopen($url, 'r');
+		$content=@fread($fp, 2048);
+		@fclose($fp);
 
 		// cleanup
 		@unlink($testfile);
@@ -469,13 +466,7 @@ class OC_Util {
 			return(false);
 		}else{
 			return(true);
-
 		}
-
-        }
-
-
-
-
+	}
 
 }