433 lines
14 KiB
PHP
Executable file
433 lines
14 KiB
PHP
Executable file
<?php
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/**
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* Class for utility functions
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*
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*/
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class OC_Util {
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public static $scripts=array();
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public static $styles=array();
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public static $headers=array();
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private static $rootMounted=false;
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private static $fsSetup=false;
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public static $core_styles=array();
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public static $core_scripts=array();
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// Can be set up
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public static function setupFS( $user = '' ){// configure the initial filesystem based on the configuration
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if(self::$fsSetup){//setting up the filesystem twice can only lead to trouble
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return false;
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}
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$CONFIG_DATADIRECTORY = OC_Config::getValue( "datadirectory", OC::$SERVERROOT."/data" );
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//first set up the local "root" storage
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if(!self::$rootMounted){
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OC_Filesystem::mount('OC_Filestorage_Local',array('datadir'=>$CONFIG_DATADIRECTORY),'/');
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self::$rootMounted=true;
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}
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// If we are not forced to load a specific user we load the one that is logged in
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if( $user == "" && OC_User::isLoggedIn()){
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$user = OC_User::getUser();
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}
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if( $user != "" ){ //if we aren't logged in, there is no use to set up the filesystem
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$user_dir = '/'.$user.'/files';
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$userdirectory = $CONFIG_DATADIRECTORY.$user_dir;
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if( !is_dir( $userdirectory )){
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mkdir( $userdirectory, 0755, true );
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}
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//jail the user into his "home" directory
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OC_Filesystem::init($user_dir);
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$quotaProxy=new OC_FileProxy_Quota();
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OC_FileProxy::register($quotaProxy);
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self::$fsSetup=true;
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// Load personal mount config
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if (is_file($CONFIG_DATADIRECTORY.'/'.$user.'/mount.php')) {
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$mountConfig = include($CONFIG_DATADIRECTORY.'/'.$user.'/mount.php');
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if (isset($mountConfig['user'][$user])) {
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foreach ($mountConfig['user'][$user] as $mountPoint => $options) {
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OC_Filesystem::mount($options['class'], $options['options'], $mountPoint);
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}
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}
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}
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OC_Hook::emit('OC_Filesystem', 'setup', array('user' => $user, 'user_dir' => $user_dir));
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}
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}
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public static function tearDownFS(){
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OC_Filesystem::tearDown();
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self::$fsSetup=false;
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}
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/**
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* get the current installed version of ownCloud
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* @return array
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*/
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public static function getVersion(){
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return array(4,80,1);
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}
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/**
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* get the current installed version string of ownCloud
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* @return string
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*/
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public static function getVersionString(){
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return '5 pre alpha';
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}
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/**
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* 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".
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* @return string
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*/
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public static function getEditionString(){
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return '';
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}
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/**
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* add a javascript file
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*
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* @param appid $application
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* @param filename $file
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*/
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public static function addScript( $application, $file = null ){
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if( is_null( $file )){
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$file = $application;
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$application = "";
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}
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if( !empty( $application )){
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self::$scripts[] = "$application/js/$file";
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}else{
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self::$scripts[] = "js/$file";
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}
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}
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/**
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* add a css file
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*
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* @param appid $application
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* @param filename $file
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*/
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public static function addStyle( $application, $file = null ){
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if( is_null( $file )){
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$file = $application;
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$application = "";
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}
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if( !empty( $application )){
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self::$styles[] = "$application/css/$file";
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}else{
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self::$styles[] = "css/$file";
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}
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}
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/**
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* @brief Add a custom element to the header
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* @param string tag tag name of the element
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* @param array $attributes array of attributes for the element
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* @param string $text the text content for the element
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*/
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public static function addHeader( $tag, $attributes, $text=''){
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self::$headers[]=array('tag'=>$tag,'attributes'=>$attributes,'text'=>$text);
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}
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/**
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* formats a timestamp in the "right" way
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*
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* @param int timestamp $timestamp
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* @param bool dateOnly option to ommit time from the result
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*/
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public static function formatDate( $timestamp,$dateOnly=false){
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if(isset($_SESSION['timezone'])){//adjust to clients timezone if we know it
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$systemTimeZone = intval(date('O'));
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$systemTimeZone=(round($systemTimeZone/100,0)*60)+($systemTimeZone%100);
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$clientTimeZone=$_SESSION['timezone']*60;
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$offset=$clientTimeZone-$systemTimeZone;
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$timestamp=$timestamp+$offset*60;
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}
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$timeformat=$dateOnly?'F j, Y':'F j, Y, H:i';
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return date($timeformat,$timestamp);
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}
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/**
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* Shows a pagenavi widget where you can jump to different pages.
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*
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* @param int $pagecount
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* @param int $page
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* @param string $url
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* @return OC_Template
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*/
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public static function getPageNavi($pagecount,$page,$url) {
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$pagelinkcount=8;
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if ($pagecount>1) {
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$pagestart=$page-$pagelinkcount;
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if($pagestart<0) $pagestart=0;
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$pagestop=$page+$pagelinkcount;
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if($pagestop>$pagecount) $pagestop=$pagecount;
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$tmpl = new OC_Template( '', 'part.pagenavi', '' );
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$tmpl->assign('page',$page);
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$tmpl->assign('pagecount',$pagecount);
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$tmpl->assign('pagestart',$pagestart);
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$tmpl->assign('pagestop',$pagestop);
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$tmpl->assign('url',$url);
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return $tmpl;
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}
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}
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/**
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* check if the current server configuration is suitable for ownCloud
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* @return array arrays with error messages and hints
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*/
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public static function checkServer(){
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$errors=array();
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//check for database drivers
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if(!(is_callable('sqlite_open') or class_exists('SQLite3')) and !is_callable('mysql_connect') and !is_callable('pg_connect')){
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$errors[]=array('error'=>'No database drivers (sqlite, mysql, or postgresql) installed.<br/>','hint'=>'');//TODO: sane hint
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}
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$CONFIG_DBTYPE = OC_Config::getValue( "dbtype", "sqlite" );
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$CONFIG_DBNAME = OC_Config::getValue( "dbname", "owncloud" );
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//common hint for all file permissons error messages
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$permissionsHint="Permissions can usually be fixed by giving the webserver write access to the ownCloud directory";
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// Check if config folder is writable.
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if(!is_writable(OC::$SERVERROOT."/config/")) {
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$errors[]=array('error'=>"Can't write into config directory 'config'",'hint'=>"You can usually fix this by giving the webserver user write access to the config directory in owncloud");
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}
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// Check if apps folder is writable.
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if(OC_Config::getValue('writable_appsdir', true) && !is_writable(OC::$SERVERROOT."/apps/")) {
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$errors[]=array('error'=>"Can't write into apps directory 'apps'",'hint'=>"You can usually fix this by giving the webserver user write access to the config directory in owncloud");
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}
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$CONFIG_DATADIRECTORY = OC_Config::getValue( "datadirectory", OC::$SERVERROOT."/data" );
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//check for correct file permissions
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if(!stristr(PHP_OS, 'WIN')){
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$permissionsModHint="Please change the permissions to 0770 so that the directory cannot be listed by other users.";
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$prems=substr(decoct(@fileperms($CONFIG_DATADIRECTORY)),-3);
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if(substr($prems,-1)!='0'){
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OC_Helper::chmodr($CONFIG_DATADIRECTORY,0770);
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clearstatcache();
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$prems=substr(decoct(@fileperms($CONFIG_DATADIRECTORY)),-3);
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if(substr($prems,2,1)!='0'){
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$errors[]=array('error'=>'Data directory ('.$CONFIG_DATADIRECTORY.') is readable for other users<br/>','hint'=>$permissionsModHint);
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}
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}
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if( OC_Config::getValue( "enablebackup", false )){
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$CONFIG_BACKUPDIRECTORY = OC_Config::getValue( "backupdirectory", OC::$SERVERROOT."/backup" );
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$prems=substr(decoct(@fileperms($CONFIG_BACKUPDIRECTORY)),-3);
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if(substr($prems,-1)!='0'){
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OC_Helper::chmodr($CONFIG_BACKUPDIRECTORY,0770);
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clearstatcache();
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$prems=substr(decoct(@fileperms($CONFIG_BACKUPDIRECTORY)),-3);
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if(substr($prems,2,1)!='0'){
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$errors[]=array('error'=>'Data directory ('.$CONFIG_BACKUPDIRECTORY.') is readable for other users<br/>','hint'=>$permissionsModHint);
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}
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}
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}
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}else{
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//TODO: permissions checks for windows hosts
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}
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// Create root dir.
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if(!is_dir($CONFIG_DATADIRECTORY)){
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$success=@mkdir($CONFIG_DATADIRECTORY);
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if(!$success) {
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$errors[]=array('error'=>"Can't create data directory (".$CONFIG_DATADIRECTORY.")",'hint'=>"You can usually fix this by giving the webserver write access to the ownCloud directory '".OC::$SERVERROOT."' (in a terminal, use the command 'chown -R www-data:www-data /path/to/your/owncloud/install/data' ");
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}
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} else if(!is_writable($CONFIG_DATADIRECTORY)){
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$errors[]=array('error'=>'Data directory ('.$CONFIG_DATADIRECTORY.') not writable by ownCloud<br/>','hint'=>$permissionsHint);
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}
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// check if all required php modules are present
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if(!class_exists('ZipArchive')){
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$errors[]=array('error'=>'PHP module zip not installed.<br/>','hint'=>'Please ask your server administrator to install the module.');
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}
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if(!function_exists('mb_detect_encoding')){
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$errors[]=array('error'=>'PHP module mb multibyte not installed.<br/>','hint'=>'Please ask your server administrator to install the module.');
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}
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if(!function_exists('ctype_digit')){
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$errors[]=array('error'=>'PHP module ctype is not installed.<br/>','hint'=>'Please ask your server administrator to install the module.');
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}
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if(!function_exists('json_encode')){
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$errors[]=array('error'=>'PHP module JSON is not installed.<br/>','hint'=>'Please ask your server administrator to install the module.');
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}
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if(!function_exists('imagepng')){
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$errors[]=array('error'=>'PHP module GD is not installed.<br/>','hint'=>'Please ask your server administrator to install the module.');
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}
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if(floatval(phpversion())<5.3){
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$errors[]=array('error'=>'PHP 5.3 is required.<br/>','hint'=>'Please ask your server administrator to update PHP to version 5.3 or higher. PHP 5.2 is no longer supported by ownCloud and the PHP community.');
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}
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if(!defined('PDO::ATTR_DRIVER_NAME')){
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$errors[]=array('error'=>'PHP PDO module is not installed.<br/>','hint'=>'Please ask your server administrator to install the module.');
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}
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return $errors;
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}
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public static function displayLoginPage($parameters = array()){
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if(isset($_COOKIE["username"])){
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$parameters["username"] = $_COOKIE["username"];
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} else {
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$parameters["username"] = '';
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}
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$sectoken=rand(1000000,9999999);
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$_SESSION['sectoken']=$sectoken;
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$parameters["sectoken"] = $sectoken;
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OC_Template::printGuestPage("", "login", $parameters);
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}
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/**
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* Check if the app is enabled, redirects to home if not
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*/
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public static function checkAppEnabled($app){
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if( !OC_App::isEnabled($app)){
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header( 'Location: '.OC_Helper::linkToAbsolute( '', 'index.php' ));
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exit();
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}
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}
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/**
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* Check if the user is logged in, redirects to home if not. With
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* redirect URL parameter to the request URI.
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*/
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public static function checkLoggedIn(){
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// Check if we are a user
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if( !OC_User::isLoggedIn()){
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header( 'Location: '.OC_Helper::linkToAbsolute( '', 'index.php' ).'?redirect_url='.urlencode($_SERVER["REQUEST_URI"]));
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exit();
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}
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}
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/**
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* Check if the user is a admin, redirects to home if not
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*/
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public static function checkAdminUser(){
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// Check if we are a user
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self::checkLoggedIn();
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if( !OC_Group::inGroup( OC_User::getUser(), 'admin' )){
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header( 'Location: '.OC_Helper::linkToAbsolute( '', 'index.php' ));
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exit();
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}
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}
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/**
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* Redirect to the user default page
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*/
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public static function redirectToDefaultPage(){
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OC_Log::write('core','redirectToDefaultPage',OC_Log::DEBUG);
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if(isset($_REQUEST['redirect_url']) && (substr($_REQUEST['redirect_url'], 0, strlen(OC::$WEBROOT)) == OC::$WEBROOT || $_REQUEST['redirect_url'][0] == '/')) {
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header( 'Location: '.$_REQUEST['redirect_url']);
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} else {
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header( 'Location: '.OC::$WEBROOT.'/'.OC_Appconfig::getValue('core', 'defaultpage', '?app=files'));
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}
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exit();
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}
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/**
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* get an id unqiue for this instance
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* @return string
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*/
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public static function getInstanceId(){
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$id=OC_Config::getValue('instanceid',null);
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if(is_null($id)){
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$id=uniqid();
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OC_Config::setValue('instanceid',$id);
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}
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return $id;
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}
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/**
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* @brief Register an get/post call. This is important to prevent CSRF attacks
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* Todo: Write howto
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* @return $token Generated token.
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*/
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public static function callRegister(){
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//mamimum time before token exires
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$maxtime=(60*60); // 1 hour
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// generate a random token.
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$token=mt_rand(1000,9000).mt_rand(1000,9000).mt_rand(1000,9000);
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// store the token together with a timestamp in the session.
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$_SESSION['requesttoken-'.$token]=time();
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// cleanup old tokens garbage collector
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// only run every 20th time so we don't waste cpu cycles
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if(rand(0,20)==0) {
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foreach($_SESSION as $key=>$value) {
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// search all tokens in the session
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if(substr($key,0,12)=='requesttoken') {
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if($value+$maxtime<time()){
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// remove outdated tokens
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unset($_SESSION[$key]);
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}
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}
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}
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}
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// return the token
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return($token);
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}
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/**
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* @brief Check an ajax get/post call if the request token is valid.
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* @return boolean False if request token is not set or is invalid.
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*/
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public static function isCallRegistered(){
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//mamimum time before token exires
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$maxtime=(60*60); // 1 hour
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if(isset($_GET['requesttoken'])) {
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$token=$_GET['requesttoken'];
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}elseif(isset($_POST['requesttoken'])){
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$token=$_POST['requesttoken'];
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}elseif(isset($_SERVER['HTTP_REQUESTTOKEN'])){
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$token=$_SERVER['HTTP_REQUESTTOKEN'];
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}else{
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//no token found.
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return false;
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}
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if(isset($_SESSION['requesttoken-'.$token])) {
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$timestamp=$_SESSION['requesttoken-'.$token];
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if($timestamp+$maxtime<time()){
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return false;
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}else{
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//token valid
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return true;
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}
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}else{
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return false;
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}
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}
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/**
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* @brief Check an ajax get/post call if the request token is valid. exit if not.
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* Todo: Write howto
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*/
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public static function callCheck(){
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if(!OC_Util::isCallRegistered()) {
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exit;
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}
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}
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/**
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* @brief Public function to sanitize HTML
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*
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* This function is used to sanitize HTML and should be applied on any string or array of strings before displaying it on a web page.
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*
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* @param string or array of strings
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* @return array with sanitized strings or a single sinitized string, depends on the input parameter.
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*/
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public static function sanitizeHTML( &$value ){
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if (is_array($value) || is_object($value)) array_walk_recursive($value,'OC_Util::sanitizeHTML');
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else $value = htmlentities($value, ENT_QUOTES, 'UTF-8'); //Specify encoding for PHP<5.4
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return $value;
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}
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}
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