nextcloud/lib/util.php

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<?php
require_once 'Patchwork/PHP/Shim/Normalizer.php';
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/**
* Class for utility functions
*
*/
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class OC_Util {
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public static $scripts=array();
public static $styles=array();
public static $headers=array();
private static $rootMounted=false;
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private static $fsSetup=false;
public static $core_styles=array();
public static $core_scripts=array();
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// Can be set up
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public static function setupFS( $user = '' ) {// configure the initial filesystem based on the configuration
if(self::$fsSetup) {//setting up the filesystem twice can only lead to trouble
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return false;
}
// 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()) {
$user = OC_User::getUser();
}
// load all filesystem apps before, so no setup-hook gets lost
if(!isset($RUNTIME_NOAPPS) || !$RUNTIME_NOAPPS) {
OC_App::loadApps(array('filesystem'));
}
// the filesystem will finish when $user is not empty,
// mark fs setup here to avoid doing the setup from loading
// OC_Filesystem
if ($user != '') {
self::$fsSetup=true;
}
$CONFIG_DATADIRECTORY = OC_Config::getValue( "datadirectory", OC::$SERVERROOT."/data" );
//first set up the local "root" storage
\OC\Files\Filesystem::initMounts();
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if(!self::$rootMounted) {
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\OC\Files\Filesystem::mount('\OC\Files\Storage\Local', array('datadir'=>$CONFIG_DATADIRECTORY), '/');
self::$rootMounted=true;
}
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if( $user != "" ) { //if we aren't logged in, there is no use to set up the filesystem
$user_dir = '/'.$user.'/files';
$user_root = OC_User::getHome($user);
$userdirectory = $user_root . '/files';
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if( !is_dir( $userdirectory )) {
mkdir( $userdirectory, 0755, true );
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}
//jail the user into his "home" directory
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\OC\Files\Filesystem::init($user, $user_dir);
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$quotaProxy=new OC_FileProxy_Quota();
$fileOperationProxy = new OC_FileProxy_FileOperations();
OC_FileProxy::register($quotaProxy);
OC_FileProxy::register($fileOperationProxy);
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OC_Hook::emit('OC_Filesystem', 'setup', array('user' => $user, 'user_dir' => $user_dir));
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}
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return true;
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}
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public static function tearDownFS() {
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\OC\Files\Filesystem::tearDown();
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self::$fsSetup=false;
self::$rootMounted=false;
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}
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/**
* get the current installed version of ownCloud
* @return array
*/
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public static function getVersion() {
// hint: We only can count up. Reset minor/patchlevel when
// updating major/minor version number.
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return array(5, 80, 05);
}
/**
* get the current installed version string of ownCloud
* @return string
*/
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public static function getVersionString() {
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return '6.0 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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public static function getEditionString() {
return '';
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}
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/**
* add a javascript file
*
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* @param appid $application
* @param filename $file
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*/
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public static function addScript( $application, $file = null ) {
if( is_null( $file )) {
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$file = $application;
$application = "";
}
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if( !empty( $application )) {
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self::$scripts[] = "$application/js/$file";
}else{
self::$scripts[] = "js/$file";
}
}
/**
* add a css file
*
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* @param appid $application
* @param filename $file
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*/
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public static function addStyle( $application, $file = null ) {
if( is_null( $file )) {
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$file = $application;
$application = "";
}
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if( !empty( $application )) {
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self::$styles[] = "$application/css/$file";
}else{
self::$styles[] = "css/$file";
}
}
/**
* @brief Add a custom element to the header
* @param string tag tag name of the element
* @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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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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/**
* formats a timestamp in the "right" way
*
* @param int timestamp $timestamp
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* @param bool dateOnly option to omit time from the result
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*/
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public static function formatDate( $timestamp, $dateOnly=false) {
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if(\OC::$session->exists('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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$clientTimeZone=\OC::$session->get('timezone')*60;
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$offset=$clientTimeZone-$systemTimeZone;
$timestamp=$timestamp+$offset*60;
}
$l=OC_L10N::get('lib');
return $l->l($dateOnly ? 'date' : 'datetime', $timestamp);
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}
/**
* check if the current server configuration is suitable for ownCloud
* @return array arrays with error messages and hints
*/
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public static function checkServer() {
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$errors=array();
Merge https://github.com/owncloud/core/pull/3827 Squashed commit of the following: commit eed4b49cebcbcc252a75ed85097730b73213b0da Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 8 10:03:23 2013 +0200 initialize OC_Defaults only once commit bf6f07ccc8fb87535a069ca341789a590cb187ee Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 8 10:02:48 2013 +0200 link to doc in error messages commit ea61ee60e06ee98f2671aec1fdaff666c50f47c2 Merge: e41af3d 3c1308f Author: Björn Schießle <schiessle@owncloud.com> Date: Thu Jul 4 11:10:56 2013 +0200 Merge branch 'master' into better-messages commit e41af3d7bad26aa5ca9ab21ec7dcbadd3cfe5d4f Author: Björn Schießle <schiessle@owncloud.com> Date: Thu Jul 4 11:10:41 2013 +0200 move to non-static defaults.php commit 9e4258b1905244bdf34943a825421f041cbed43d Author: Björn Schießle <schiessle@owncloud.com> Date: Tue Jul 2 10:32:13 2013 +0200 no sprintf here, lets t() handle it commit fe1df349e248667a137f70d78b04225e5b42a111 Merge: d8f6859 cb5811b Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 1 11:13:38 2013 +0200 Merge branch 'master' into better-messages commit d8f68595df2dc0e0917d916cbde511ec5333010b Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 1 11:10:57 2013 +0200 use document base url from defaults.php commit 6c5403748a45717125a2aa375550f05646317d72 Merge: bea6b1c 7b0e3e6 Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 1 11:00:15 2013 +0200 Merge branch 'master' into better-messages commit bea6b1c8a0968846065b9153e0a3f46a4e3245ee Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Mon Jun 24 16:21:12 2013 +0200 link to docs in WebDAV message, ref #3791 commit 3119b364a1094769e711283d1ce9014505f64ab9 Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Mon Jun 24 16:10:21 2013 +0200 link to docs in error messages, fix #3819
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$defaults = new \OC_Defaults();
$web_server_restart= false;
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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')
and !is_callable('oci_connect')) {
$errors[]=array('error'=>'No database drivers (sqlite, mysql, or postgresql) installed.',
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'hint'=>'');//TODO: sane hint
$web_server_restart= true;
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}
//common hint for all file permissons error messages
Merge https://github.com/owncloud/core/pull/3827 Squashed commit of the following: commit eed4b49cebcbcc252a75ed85097730b73213b0da Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 8 10:03:23 2013 +0200 initialize OC_Defaults only once commit bf6f07ccc8fb87535a069ca341789a590cb187ee Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 8 10:02:48 2013 +0200 link to doc in error messages commit ea61ee60e06ee98f2671aec1fdaff666c50f47c2 Merge: e41af3d 3c1308f Author: Björn Schießle <schiessle@owncloud.com> Date: Thu Jul 4 11:10:56 2013 +0200 Merge branch 'master' into better-messages commit e41af3d7bad26aa5ca9ab21ec7dcbadd3cfe5d4f Author: Björn Schießle <schiessle@owncloud.com> Date: Thu Jul 4 11:10:41 2013 +0200 move to non-static defaults.php commit 9e4258b1905244bdf34943a825421f041cbed43d Author: Björn Schießle <schiessle@owncloud.com> Date: Tue Jul 2 10:32:13 2013 +0200 no sprintf here, lets t() handle it commit fe1df349e248667a137f70d78b04225e5b42a111 Merge: d8f6859 cb5811b Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 1 11:13:38 2013 +0200 Merge branch 'master' into better-messages commit d8f68595df2dc0e0917d916cbde511ec5333010b Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 1 11:10:57 2013 +0200 use document base url from defaults.php commit 6c5403748a45717125a2aa375550f05646317d72 Merge: bea6b1c 7b0e3e6 Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 1 11:00:15 2013 +0200 Merge branch 'master' into better-messages commit bea6b1c8a0968846065b9153e0a3f46a4e3245ee Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Mon Jun 24 16:21:12 2013 +0200 link to docs in WebDAV message, ref #3791 commit 3119b364a1094769e711283d1ce9014505f64ab9 Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Mon Jun 24 16:10:21 2013 +0200 link to docs in error messages, fix #3819
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$permissionsHint = 'Permissions can usually be fixed by '
.'<a href="' . $defaults->getDocBaseUrl() . '/server/5.0/admin_manual/installation/installation_source.html#set-the-directory-permissions" target="_blank">giving the webserver write access to the root directory</a>.';
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// Check if config folder is writable.
if(!is_writable(OC::$SERVERROOT."/config/") or !is_readable(OC::$SERVERROOT."/config/")) {
Merge https://github.com/owncloud/core/pull/3827 Squashed commit of the following: commit eed4b49cebcbcc252a75ed85097730b73213b0da Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 8 10:03:23 2013 +0200 initialize OC_Defaults only once commit bf6f07ccc8fb87535a069ca341789a590cb187ee Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 8 10:02:48 2013 +0200 link to doc in error messages commit ea61ee60e06ee98f2671aec1fdaff666c50f47c2 Merge: e41af3d 3c1308f Author: Björn Schießle <schiessle@owncloud.com> Date: Thu Jul 4 11:10:56 2013 +0200 Merge branch 'master' into better-messages commit e41af3d7bad26aa5ca9ab21ec7dcbadd3cfe5d4f Author: Björn Schießle <schiessle@owncloud.com> Date: Thu Jul 4 11:10:41 2013 +0200 move to non-static defaults.php commit 9e4258b1905244bdf34943a825421f041cbed43d Author: Björn Schießle <schiessle@owncloud.com> Date: Tue Jul 2 10:32:13 2013 +0200 no sprintf here, lets t() handle it commit fe1df349e248667a137f70d78b04225e5b42a111 Merge: d8f6859 cb5811b Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 1 11:13:38 2013 +0200 Merge branch 'master' into better-messages commit d8f68595df2dc0e0917d916cbde511ec5333010b Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 1 11:10:57 2013 +0200 use document base url from defaults.php commit 6c5403748a45717125a2aa375550f05646317d72 Merge: bea6b1c 7b0e3e6 Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 1 11:00:15 2013 +0200 Merge branch 'master' into better-messages commit bea6b1c8a0968846065b9153e0a3f46a4e3245ee Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Mon Jun 24 16:21:12 2013 +0200 link to docs in WebDAV message, ref #3791 commit 3119b364a1094769e711283d1ce9014505f64ab9 Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Mon Jun 24 16:10:21 2013 +0200 link to docs in error messages, fix #3819
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$errors[] = array(
'error' => "Can't write into config directory",
'hint' => 'This can usually be fixed by '
.'<a href="' . $defaults->getDocBaseUrl() . '/server/5.0/admin_manual/installation/installation_source.html#set-the-directory-permissions" target="_blank">giving the webserver write access to the config directory</a>.'
);
}
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// Check if there is a writable install folder.
if(OC_Config::getValue('appstoreenabled', true)) {
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if( OC_App::getInstallPath() === null
|| !is_writable(OC_App::getInstallPath())
|| !is_readable(OC_App::getInstallPath()) ) {
Merge https://github.com/owncloud/core/pull/3827 Squashed commit of the following: commit eed4b49cebcbcc252a75ed85097730b73213b0da Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 8 10:03:23 2013 +0200 initialize OC_Defaults only once commit bf6f07ccc8fb87535a069ca341789a590cb187ee Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 8 10:02:48 2013 +0200 link to doc in error messages commit ea61ee60e06ee98f2671aec1fdaff666c50f47c2 Merge: e41af3d 3c1308f Author: Björn Schießle <schiessle@owncloud.com> Date: Thu Jul 4 11:10:56 2013 +0200 Merge branch 'master' into better-messages commit e41af3d7bad26aa5ca9ab21ec7dcbadd3cfe5d4f Author: Björn Schießle <schiessle@owncloud.com> Date: Thu Jul 4 11:10:41 2013 +0200 move to non-static defaults.php commit 9e4258b1905244bdf34943a825421f041cbed43d Author: Björn Schießle <schiessle@owncloud.com> Date: Tue Jul 2 10:32:13 2013 +0200 no sprintf here, lets t() handle it commit fe1df349e248667a137f70d78b04225e5b42a111 Merge: d8f6859 cb5811b Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 1 11:13:38 2013 +0200 Merge branch 'master' into better-messages commit d8f68595df2dc0e0917d916cbde511ec5333010b Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 1 11:10:57 2013 +0200 use document base url from defaults.php commit 6c5403748a45717125a2aa375550f05646317d72 Merge: bea6b1c 7b0e3e6 Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 1 11:00:15 2013 +0200 Merge branch 'master' into better-messages commit bea6b1c8a0968846065b9153e0a3f46a4e3245ee Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Mon Jun 24 16:21:12 2013 +0200 link to docs in WebDAV message, ref #3791 commit 3119b364a1094769e711283d1ce9014505f64ab9 Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Mon Jun 24 16:10:21 2013 +0200 link to docs in error messages, fix #3819
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$errors[] = array(
'error' => "Can't write into apps directory",
'hint' => 'This can usually be fixed by '
.'<a href="' . $defaults->getDocBaseUrl() . '/server/5.0/admin_manual/installation/installation_source.html#set-the-directory-permissions" target="_blank">giving the webserver write access to the apps directory</a> '
.'or disabling the appstore in the config file.'
);
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}
}
$CONFIG_DATADIRECTORY = OC_Config::getValue( "datadirectory", OC::$SERVERROOT."/data" );
// Create root dir.
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if(!is_dir($CONFIG_DATADIRECTORY)) {
$success=@mkdir($CONFIG_DATADIRECTORY);
if ($success) {
$errors = array_merge($errors, self::checkDataDirectoryPermissions($CONFIG_DATADIRECTORY));
} else {
Merge https://github.com/owncloud/core/pull/3827 Squashed commit of the following: commit eed4b49cebcbcc252a75ed85097730b73213b0da Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 8 10:03:23 2013 +0200 initialize OC_Defaults only once commit bf6f07ccc8fb87535a069ca341789a590cb187ee Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 8 10:02:48 2013 +0200 link to doc in error messages commit ea61ee60e06ee98f2671aec1fdaff666c50f47c2 Merge: e41af3d 3c1308f Author: Björn Schießle <schiessle@owncloud.com> Date: Thu Jul 4 11:10:56 2013 +0200 Merge branch 'master' into better-messages commit e41af3d7bad26aa5ca9ab21ec7dcbadd3cfe5d4f Author: Björn Schießle <schiessle@owncloud.com> Date: Thu Jul 4 11:10:41 2013 +0200 move to non-static defaults.php commit 9e4258b1905244bdf34943a825421f041cbed43d Author: Björn Schießle <schiessle@owncloud.com> Date: Tue Jul 2 10:32:13 2013 +0200 no sprintf here, lets t() handle it commit fe1df349e248667a137f70d78b04225e5b42a111 Merge: d8f6859 cb5811b Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 1 11:13:38 2013 +0200 Merge branch 'master' into better-messages commit d8f68595df2dc0e0917d916cbde511ec5333010b Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 1 11:10:57 2013 +0200 use document base url from defaults.php commit 6c5403748a45717125a2aa375550f05646317d72 Merge: bea6b1c 7b0e3e6 Author: Björn Schießle <schiessle@owncloud.com> Date: Mon Jul 1 11:00:15 2013 +0200 Merge branch 'master' into better-messages commit bea6b1c8a0968846065b9153e0a3f46a4e3245ee Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Mon Jun 24 16:21:12 2013 +0200 link to docs in WebDAV message, ref #3791 commit 3119b364a1094769e711283d1ce9014505f64ab9 Author: Jan-Christoph Borchardt <hey@jancborchardt.net> Date: Mon Jun 24 16:10:21 2013 +0200 link to docs in error messages, fix #3819
2013-07-08 12:07:57 +04:00
$errors[] = array(
'error' => "Can't create data directory (".$CONFIG_DATADIRECTORY.")",
'hint' => 'This can usually be fixed by '
.'<a href="' . $defaults->getDocBaseUrl() . '/server/5.0/admin_manual/installation/installation_source.html#set-the-directory-permissions" target="_blank">giving the webserver write access to the root directory</a>.'
);
}
} else if(!is_writable($CONFIG_DATADIRECTORY) or !is_readable($CONFIG_DATADIRECTORY)) {
$errors[]=array('error'=>'Data directory ('.$CONFIG_DATADIRECTORY.') not writable by ownCloud',
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'hint'=>$permissionsHint);
} else {
$errors = array_merge($errors, self::checkDataDirectoryPermissions($CONFIG_DATADIRECTORY));
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}
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// check if all required php modules are present
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if(!class_exists('ZipArchive')) {
$errors[]=array('error'=>'PHP module zip not installed.',
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'hint'=>'Please ask your server administrator to install the module.');
$web_server_restart=true;
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}
if(!class_exists('DOMDocument')) {
$errors[] = array('error' => 'PHP module dom not installed.',
'hint' => 'Please ask your server administrator to install the module.');
$web_server_restart =true;
}
if(!function_exists('xml_parser_create')) {
$errors[] = array('error' => 'PHP module libxml not installed.',
'hint' => 'Please ask your server administrator to install the module.');
$web_server_restart =true;
}
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if(!function_exists('mb_detect_encoding')) {
$errors[]=array('error'=>'PHP module mb multibyte not installed.',
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'hint'=>'Please ask your server administrator to install the module.');
$web_server_restart=true;
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}
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if(!function_exists('ctype_digit')) {
$errors[]=array('error'=>'PHP module ctype is not installed.',
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'hint'=>'Please ask your server administrator to install the module.');
$web_server_restart=true;
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}
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if(!function_exists('json_encode')) {
$errors[]=array('error'=>'PHP module JSON is not installed.',
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'hint'=>'Please ask your server administrator to install the module.');
$web_server_restart=true;
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}
if(!extension_loaded('gd') || !function_exists('gd_info')) {
$errors[]=array('error'=>'PHP module GD is not installed.',
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'hint'=>'Please ask your server administrator to install the module.');
$web_server_restart=true;
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}
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if(!function_exists('gzencode')) {
$errors[]=array('error'=>'PHP module zlib is not installed.',
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'hint'=>'Please ask your server administrator to install the module.');
$web_server_restart=true;
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}
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if(!function_exists('iconv')) {
$errors[]=array('error'=>'PHP module iconv is not installed.',
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'hint'=>'Please ask your server administrator to install the module.');
$web_server_restart=true;
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}
if(!function_exists('simplexml_load_string')) {
$errors[]=array('error'=>'PHP module SimpleXML is not installed.',
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'hint'=>'Please ask your server administrator to install the module.');
$web_server_restart=true;
}
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if(floatval(phpversion())<5.3) {
$errors[]=array('error'=>'PHP 5.3 is required.',
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'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.');
$web_server_restart=true;
}
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if(!defined('PDO::ATTR_DRIVER_NAME')) {
$errors[]=array('error'=>'PHP PDO module is not installed.',
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'hint'=>'Please ask your server administrator to install the module.');
$web_server_restart=true;
}
if (((strtolower(@ini_get('safe_mode')) == 'on')
|| (strtolower(@ini_get('safe_mode')) == 'yes')
|| (strtolower(@ini_get('safe_mode')) == 'true')
|| (ini_get("safe_mode") == 1 ))) {
$errors[]=array('error'=>'PHP Safe Mode is enabled. ownCloud requires that it is disabled to work properly.',
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'hint'=>'PHP Safe Mode is a deprecated and mostly useless setting that should be disabled. Please ask your server administrator to disable it in php.ini or in your webserver config.');
$web_server_restart=true;
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}
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if (get_magic_quotes_gpc() == 1 ) {
$errors[]=array('error'=>'Magic Quotes is enabled. ownCloud requires that it is disabled to work properly.',
'hint'=>'Magic Quotes is a deprecated and mostly useless setting that should be disabled. Please ask your server administrator to disable it in php.ini or in your webserver config.');
$web_server_restart=true;
}
if($web_server_restart) {
$errors[]=array('error'=>'PHP modules have been installed, but they are still listed as missing?',
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'hint'=>'Please ask your server administrator to restart the web server.');
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}
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return $errors;
}
/**
* Check for correct file permissions of data directory
* @return array arrays with error messages and hints
*/
public static function checkDataDirectoryPermissions($dataDirectory) {
$errors = array();
if (stristr(PHP_OS, 'WIN')) {
//TODO: permissions checks for windows hosts
} else {
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$permissionsModHint = 'Please change the permissions to 0770 so that the directory'
.' cannot be listed by other users.';
$prems = substr(decoct(@fileperms($dataDirectory)), -3);
if (substr($prems, -1) != '0') {
OC_Helper::chmodr($dataDirectory, 0770);
clearstatcache();
$prems = substr(decoct(@fileperms($dataDirectory)), -3);
if (substr($prems, 2, 1) != '0') {
$errors[] = array('error' => 'Data directory ('.$dataDirectory.') is readable for other users',
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'hint' => $permissionsModHint);
}
}
}
return $errors;
}
public static function displayLoginPage($errors = array()) {
$parameters = array();
foreach( $errors as $key => $value ) {
$parameters[$value] = true;
}
if (!empty($_POST['user'])) {
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$parameters["username"] = $_POST['user'];
$parameters['user_autofocus'] = false;
} else {
$parameters["username"] = '';
$parameters['user_autofocus'] = true;
}
if (isset($_REQUEST['redirect_url'])) {
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$redirect_url = $_REQUEST['redirect_url'];
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$parameters['redirect_url'] = urlencode($redirect_url);
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}
$parameters['alt_login'] = OC_App::getAlternativeLogIns();
OC_Template::printGuestPage("", "login", $parameters);
}
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/**
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* Check if the app is enabled, redirects to home if not
*/
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public static function checkAppEnabled($app) {
if( !OC_App::isEnabled($app)) {
header( 'Location: '.OC_Helper::linkToAbsolute( '', 'index.php' ));
exit();
}
}
/**
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* Check if the user is logged in, redirects to home if not. With
* redirect URL parameter to the request URI.
*/
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public static function checkLoggedIn() {
// 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',
array('redirect_url' => OC_Request::requestUri())));
exit();
}
}
/**
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* Check if the user is a admin, redirects to home if not
*/
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public static function checkAdminUser() {
if( !OC_User::isAdminUser(OC_User::getUser())) {
header( 'Location: '.OC_Helper::linkToAbsolute( '', 'index.php' ));
exit();
}
}
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/**
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* Check if the user is a subadmin, redirects to home if not
* @return array $groups where the current user is subadmin
*/
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public static function checkSubAdminUser() {
if(!OC_SubAdmin::isSubAdmin(OC_User::getUser())) {
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header( 'Location: '.OC_Helper::linkToAbsolute( '', 'index.php' ));
exit();
}
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return true;
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}
/**
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* Redirect to the user default page
*/
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public static function redirectToDefaultPage() {
if(isset($_REQUEST['redirect_url'])) {
$location = OC_Helper::makeURLAbsolute(urldecode($_REQUEST['redirect_url']));
}
else if (isset(OC::$REQUESTEDAPP) && !empty(OC::$REQUESTEDAPP)) {
$location = OC_Helper::linkToAbsolute( OC::$REQUESTEDAPP, 'index.php' );
}
else {
$defaultpage = OC_Appconfig::getValue('core', 'defaultpage');
if ($defaultpage) {
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$location = OC_Helper::makeURLAbsolute(OC::$WEBROOT.'/'.$defaultpage);
}
else {
$location = OC_Helper::linkToAbsolute( 'files', 'index.php' );
}
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}
OC_Log::write('core', 'redirectToDefaultPage: '.$location, OC_Log::DEBUG);
header( 'Location: '.$location );
exit();
}
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/**
* get an id unique for this instance
* @return string
*/
public static function getInstanceId() {
$id = OC_Config::getValue('instanceid', null);
if(is_null($id)) {
// We need to guarantee at least one letter in instanceid so it can be used as the session_name
$id = 'oc' . OC_Util::generate_random_bytes(10);
OC_Config::setValue('instanceid', $id);
}
return $id;
}
/**
* @brief Static lifespan (in seconds) when a request token expires.
* @see OC_Util::callRegister()
* @see OC_Util::isCallRegistered()
* @description
* Also required for the client side to compute the piont in time when to
* request a fresh token. The client will do so when nearly 97% of the
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* timespan coded here has expired.
*/
public static $callLifespan = 3600; // 3600 secs = 1 hour
/**
* @brief Register an get/post call. Important to prevent CSRF attacks.
* @todo Write howto: CSRF protection guide
* @return $token Generated token.
* @description
* Creates a 'request token' (random) and stores it inside the session.
* Ever subsequent (ajax) request must use such a valid token to succeed,
* otherwise the request will be denied as a protection against CSRF.
* The tokens expire after a fixed lifespan.
* @see OC_Util::$callLifespan
* @see OC_Util::isCallRegistered()
*/
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public static function callRegister() {
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// Check if a token exists
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if(!\OC::$session->exists('requesttoken')) {
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// No valid token found, generate a new one.
$requestToken = self::generate_random_bytes(20);
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\OC::$session->set('requesttoken', $requestToken);
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} else {
// Valid token already exists, send it
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$requestToken = \OC::$session->get('requesttoken');
}
return($requestToken);
}
/**
* @brief Check an ajax get/post call if the request token is valid.
* @return boolean False if request token is not set or is invalid.
* @see OC_Util::$callLifespan
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* @see OC_Util::callRegister()
*/
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public static function isCallRegistered() {
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if(!\OC::$session->exists('requesttoken')) {
return false;
}
if(isset($_GET['requesttoken'])) {
$token=$_GET['requesttoken'];
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} elseif(isset($_POST['requesttoken'])) {
$token=$_POST['requesttoken'];
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} elseif(isset($_SERVER['HTTP_REQUESTTOKEN'])) {
$token=$_SERVER['HTTP_REQUESTTOKEN'];
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} else {
//no token found.
return false;
}
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// Check if the token is valid
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if($token !== \OC::$session->get('requesttoken')) {
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// Not valid
return false;
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} else {
// Valid token
return true;
}
}
/**
* @brief Check an ajax get/post call if the request token is valid. exit if not.
* Todo: Write howto
*/
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public static function callCheck() {
if(!OC_Util::isCallRegistered()) {
exit;
}
}
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/**
* @brief Public function to sanitize HTML
*
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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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*
* @param string or array of strings
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* @return array with sanitized strings or a single sanitized string, depends on the input parameter.
*/
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public static function sanitizeHTML( &$value ) {
if (is_array($value)) {
array_walk_recursive($value, 'OC_Util::sanitizeHTML');
} else {
$value = htmlentities((string)$value, ENT_QUOTES, 'UTF-8'); //Specify encoding for PHP<5.4
}
return $value;
}
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/**
* @brief Public function to encode url parameters
*
* This function is used to encode path to file before output.
* Encoding is done according to RFC 3986 with one exception:
* Character '/' is preserved as is.
*
* @param string $component part of URI to encode
* @return string
*/
public static function encodePath($component) {
$encoded = rawurlencode($component);
$encoded = str_replace('%2F', '/', $encoded);
return $encoded;
}
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/**
* 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';
$testcontent='testcontent';
// creating a test file
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$testfile = OC_Config::getValue( "datadirectory", OC::$SERVERROOT."/data" ).'/'.$filename;
if(file_exists($testfile)) {// already running this test, possible recursive call
return false;
}
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$fp = @fopen($testfile, 'w');
@fwrite($fp, $testcontent);
@fclose($fp);
// accessing the file via http
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$url = OC_Helper::makeURLAbsolute(OC::$WEBROOT.'/data'.$filename);
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$fp = @fopen($url, 'r');
$content=@fread($fp, 2048);
@fclose($fp);
// cleanup
@unlink($testfile);
// does it work ?
if($content==$testcontent) {
return(false);
}else{
return(true);
}
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}
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/**
* we test if webDAV is working properly
*
* The basic assumption is that if the server returns 401/Not Authenticated for an unauthenticated PROPFIND
* the web server it self is setup properly.
*
* Why not an authenticated PROFIND and other verbs?
* - We don't have the password available
* - We have no idea about other auth methods implemented (e.g. OAuth with Bearer header)
*
*/
public static function isWebDAVWorking() {
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if (!function_exists('curl_init')) {
return true;
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}
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$settings = array(
'baseUri' => OC_Helper::linkToRemote('webdav'),
);
// save the old timeout so that we can restore it later
$old_timeout=ini_get("default_socket_timeout");
// use a 5 sec timeout for the check. Should be enough for local requests.
ini_set("default_socket_timeout", 5);
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$client = new \Sabre_DAV_Client($settings);
// for this self test we don't care if the ssl certificate is self signed and the peer cannot be verified.
$client->setVerifyPeer(false);
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$return = true;
try {
// test PROPFIND
$client->propfind('', array('{DAV:}resourcetype'));
} catch(\Sabre_DAV_Exception_NotAuthenticated $e) {
$return = true;
} catch(\Exception $e) {
OC_Log::write('core', 'isWebDAVWorking: NO - Reason: '.$e->getMessage(). ' ('.get_class($e).')', OC_Log::WARN);
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$return = false;
}
// restore the original timeout
ini_set("default_socket_timeout", $old_timeout);
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return $return;
}
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/**
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* Check if the setlocal call doesn't work. This can happen if the right
* local packages are not available on the server.
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*/
public static function issetlocaleworking() {
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// setlocale test is pointless on Windows
if (OC_Util::runningOnWindows() ) {
return true;
}
$result = setlocale(LC_ALL, 'en_US.UTF-8', 'en_US.UTF8');
if($result == false) {
return false;
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}
return true;
}
/**
* Check if the PHP module fileinfo is loaded.
* @return bool
*/
public static function fileInfoLoaded() {
return function_exists('finfo_open');
}
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/**
* Check if the ownCloud server can connect to the internet
*/
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public static function isInternetConnectionWorking() {
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// in case there is no internet connection on purpose return false
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if (self::isInternetConnectionEnabled() === false) {
return false;
}
// try to connect to owncloud.org to see if http connections to the internet are possible.
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$connected = @fsockopen("www.owncloud.org", 80);
if ($connected) {
fclose($connected);
return true;
}else{
// second try in case one server is down
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$connected = @fsockopen("apps.owncloud.com", 80);
if ($connected) {
fclose($connected);
return true;
}else{
return false;
}
}
}
/**
* Check if the connection to the internet is disabled on purpose
*/
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public static function isInternetConnectionEnabled(){
return \OC_Config::getValue("has_internet_connection", true);
}
/**
* clear all levels of output buffering
*/
public static function obEnd(){
while (ob_get_level()) {
ob_end_clean();
}
}
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/**
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* @brief Generates a cryptographical secure pseudorandom string
* @param Int with the length of the random string
* @return String
* Please also update secureRNG_available if you change something here
*/
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public static function generate_random_bytes($length = 30) {
// Try to use openssl_random_pseudo_bytes
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if(function_exists('openssl_random_pseudo_bytes')) {
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$pseudo_byte = bin2hex(openssl_random_pseudo_bytes($length, $strong));
if($strong == true) {
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return substr($pseudo_byte, 0, $length); // Truncate it to match the length
}
}
// Try to use /dev/urandom
$fp = @file_get_contents('/dev/urandom', false, null, 0, $length);
if ($fp !== false) {
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$string = substr(bin2hex($fp), 0, $length);
return $string;
}
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// Fallback to mt_rand()
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$characters = '0123456789';
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$characters .= 'abcdefghijklmnopqrstuvwxyz';
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$charactersLength = strlen($characters)-1;
$pseudo_byte = "";
// Select some random characters
for ($i = 0; $i < $length; $i++) {
$pseudo_byte .= $characters[mt_rand(0, $charactersLength)];
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}
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return $pseudo_byte;
}
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/**
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* @brief Checks if a secure random number generator is available
* @return bool
*/
public static function secureRNG_available() {
// Check openssl_random_pseudo_bytes
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if(function_exists('openssl_random_pseudo_bytes')) {
openssl_random_pseudo_bytes(1, $strong);
if($strong == true) {
return true;
}
}
// Check /dev/urandom
$fp = @file_get_contents('/dev/urandom', false, null, 0, 1);
if ($fp !== false) {
return true;
}
return false;
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}
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/**
* @Brief Get file content via curl.
* @param string $url Url to get content
* @return string of the response or false on error
* This function get the content of a page via curl, if curl is enabled.
* If not, file_get_element is used.
*/
public static function getUrlContent($url){
if (function_exists('curl_init')) {
$curl = curl_init();
curl_setopt($curl, CURLOPT_HEADER, 0);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 10);
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($curl, CURLOPT_MAXREDIRS, 10);
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curl_setopt($curl, CURLOPT_USERAGENT, "ownCloud Server Crawler");
if(OC_Config::getValue('proxy', '')<>'') {
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curl_setopt($curl, CURLOPT_PROXY, OC_Config::getValue('proxy'));
}
if(OC_Config::getValue('proxyuserpwd', '')<>'') {
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curl_setopt($curl, CURLOPT_PROXYUSERPWD, OC_Config::getValue('proxyuserpwd'));
}
$data = curl_exec($curl);
curl_close($curl);
} else {
$contextArray = null;
if(OC_Config::getValue('proxy', '')<>'') {
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$contextArray = array(
'http' => array(
'timeout' => 10,
'proxy' => OC_Config::getValue('proxy')
)
);
} else {
$contextArray = array(
'http' => array(
'timeout' => 10
)
);
}
$ctx = stream_context_create(
$contextArray
);
$data=@file_get_contents($url, 0, $ctx);
}
return $data;
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}
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/**
* @return bool - well are we running on windows or not
*/
public static function runningOnWindows() {
return (substr(PHP_OS, 0, 3) === "WIN");
}
/**
* Handles the case that there may not be a theme, then check if a "default"
* theme exists and take that one
* @return string the theme
*/
public static function getTheme() {
$theme = OC_Config::getValue("theme", '');
if($theme === '') {
if(is_dir(OC::$SERVERROOT . '/themes/default')) {
$theme = 'default';
}
}
return $theme;
}
/**
* Clear the opcode cache if one exists
* This is necessary for writing to the config file
* in case the opcode cache doesn't revalidate files
*/
public static function clearOpcodeCache() {
// APC
if (function_exists('apc_clear_cache')) {
apc_clear_cache();
}
// Zend Opcache
if (function_exists('accelerator_reset')) {
accelerator_reset();
}
// XCache
if (function_exists('xcache_clear_cache')) {
xcache_clear_cache(XC_TYPE_VAR, 0);
}
}
/**
* Normalize a unicode string
* @param string $value a not normalized string
* @return bool|string
*/
public static function normalizeUnicode($value) {
if(class_exists('Patchwork\PHP\Shim\Normalizer')) {
$normalizedValue = \Patchwork\PHP\Shim\Normalizer::normalize($value);
if($normalizedValue === false) {
\OC_Log::write( 'core', 'normalizing failed for "' . $value . '"', \OC_Log::WARN);
} else {
$value = $normalizedValue;
}
}
return $value;
}
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}