616 lines
17 KiB
PHP
616 lines
17 KiB
PHP
<?php
|
|
/**
|
|
* ownCloud
|
|
*
|
|
* @author Frank Karlitschek
|
|
* @author Jakob Sack
|
|
* @copyright 2010 Frank Karlitschek karlitschek@kde.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/>.
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* Collection of useful functions
|
|
*/
|
|
class OC_Helper {
|
|
private static $mimetypes=array();
|
|
private static $tmpFiles=array();
|
|
|
|
/**
|
|
* @brief Creates an url
|
|
* @param $app app
|
|
* @param $file file
|
|
* @returns the url
|
|
*
|
|
* Returns a url to the given app and file.
|
|
*/
|
|
public static function linkTo( $app, $file ){
|
|
if( $app != '' ){
|
|
$app .= '/';
|
|
// Check if the app is in the app folder
|
|
if( file_exists( OC::$APPSROOT . '/apps/'. $app.$file )){
|
|
if(substr($file, -3) == 'php' || substr($file, -3) == 'css'){
|
|
if(substr($app, -1, 1) == '/'){
|
|
$app = substr($app, 0, strlen($app) - 1);
|
|
}
|
|
$urlLinkTo = OC::$WEBROOT . '/?app=' . $app;
|
|
$urlLinkTo .= ($file!='index.php')?'&getfile=' . urlencode($file):'';
|
|
}else{
|
|
$urlLinkTo = OC::$APPSWEBROOT . '/apps/' . $app . $file;
|
|
}
|
|
}
|
|
else{
|
|
$urlLinkTo = OC::$WEBROOT . '/' . $app . $file;
|
|
}
|
|
}
|
|
else{
|
|
if( file_exists( OC::$SERVERROOT . '/core/'. $file )){
|
|
$urlLinkTo = OC::$WEBROOT . '/core/'.$file;
|
|
}
|
|
else{
|
|
$urlLinkTo = OC::$WEBROOT . '/'.$file;
|
|
}
|
|
}
|
|
|
|
return $urlLinkTo;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the server host
|
|
* @returns the server host
|
|
*
|
|
* Returns the server host, even if the website uses one or more
|
|
* reverse proxies
|
|
*/
|
|
public static function serverHost() {
|
|
if (isset($_SERVER['HTTP_X_FORWARDED_HOST'])) {
|
|
if (strpos($_SERVER['HTTP_X_FORWARDED_HOST'], ",") !== false) {
|
|
$host = trim(array_pop(explode(",", $_SERVER['HTTP_X_FORWARDED_HOST'])));
|
|
}
|
|
else{
|
|
$host=$_SERVER['HTTP_X_FORWARDED_HOST'];
|
|
}
|
|
}
|
|
else{
|
|
$host = $_SERVER['HTTP_HOST'];
|
|
}
|
|
return $host;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the server protocol
|
|
* @returns the server protocol
|
|
*
|
|
* Returns the server protocol. It respects reverse proxy servers and load balancers
|
|
*/
|
|
public static function serverProtocol() {
|
|
if (isset($_SERVER['HTTP_X_FORWARDED_PROTO'])) {
|
|
$proto = strtolower($_SERVER['HTTP_X_FORWARDED_PROTO']);
|
|
}else{
|
|
if(isset($_SERVER['HTTPS']) and !empty($_SERVER['HTTPS']) and ($_SERVER['HTTPS']!='off')) {
|
|
$proto = 'https';
|
|
}else{
|
|
$proto = 'http';
|
|
}
|
|
}
|
|
return($proto);
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Creates an absolute url
|
|
* @param $app app
|
|
* @param $file file
|
|
* @returns the url
|
|
*
|
|
* Returns a absolute url to the given app and file.
|
|
*/
|
|
public static function linkToAbsolute( $app, $file ) {
|
|
$urlLinkTo = self::linkTo( $app, $file );
|
|
$urlLinkTo = OC_Helper::serverProtocol(). '://' . self::serverHost() . $urlLinkTo;
|
|
return $urlLinkTo;
|
|
}
|
|
|
|
/**
|
|
* @brief Creates an absolute url for remote use
|
|
* @param $service id
|
|
* @returns the url
|
|
*
|
|
* Returns a absolute url to the given service.
|
|
*/
|
|
public static function linkToRemote( $service ) {
|
|
return self::linkToAbsolute( '', 'remote.php') . '/' . $service . '/';
|
|
}
|
|
|
|
/**
|
|
* @brief Creates path to an image
|
|
* @param $app app
|
|
* @param $image image name
|
|
* @returns the url
|
|
*
|
|
* Returns the path to the image.
|
|
*/
|
|
public static function imagePath( $app, $image ){
|
|
// Read the selected theme from the config file
|
|
$theme=OC_Config::getValue( "theme" );
|
|
|
|
// Check if the app is in the app folder
|
|
if( file_exists( OC::$SERVERROOT."/themes/$theme/apps/$app/img/$image" )){
|
|
return OC::$WEBROOT."/themes/$theme/apps/$app/img/$image";
|
|
}elseif( file_exists( OC::$APPSROOT."/apps/$app/img/$image" )){
|
|
return OC::$APPSWEBROOT."/apps/$app/img/$image";
|
|
}elseif( !empty( $app ) and file_exists( OC::$SERVERROOT."/themes/$theme/$app/img/$image" )){
|
|
return OC::$WEBROOT."/themes/$theme/$app/img/$image";
|
|
}elseif( !empty( $app ) and file_exists( OC::$SERVERROOT."/$app/img/$image" )){
|
|
return OC::$WEBROOT."/$app/img/$image";
|
|
}elseif( file_exists( OC::$SERVERROOT."/themes/$theme/core/img/$image" )){
|
|
return OC::$WEBROOT."/themes/$theme/core/img/$image";
|
|
}elseif( file_exists( OC::$SERVERROOT."/core/img/$image" )){
|
|
return OC::$WEBROOT."/core/img/$image";
|
|
}else{
|
|
echo('image not found: image:'.$image.' webroot:'.OC::$WEBROOT.' serverroot:'.OC::$SERVERROOT);
|
|
die();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief get path to icon of file type
|
|
* @param $mimetype mimetype
|
|
* @returns the url
|
|
*
|
|
* Returns the path to the image of this file type.
|
|
*/
|
|
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 );
|
|
|
|
// Is it a dir?
|
|
if( $mimetype == "dir" ){
|
|
return OC::$WEBROOT."/core/img/filetypes/folder.png";
|
|
}
|
|
|
|
// Icon exists?
|
|
if( file_exists( OC::$SERVERROOT."/core/img/filetypes/$mimetype.png" )){
|
|
return OC::$WEBROOT."/core/img/filetypes/$mimetype.png";
|
|
}
|
|
//try only the first part of the filetype
|
|
$mimetype=substr($mimetype,0,strpos($mimetype,'-'));
|
|
if( file_exists( OC::$SERVERROOT."/core/img/filetypes/$mimetype.png" )){
|
|
return OC::$WEBROOT."/core/img/filetypes/$mimetype.png";
|
|
}
|
|
else{
|
|
return OC::$WEBROOT."/core/img/filetypes/file.png";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Make a human file size
|
|
* @param $bytes file size in bytes
|
|
* @returns a human readable file size
|
|
*
|
|
* Makes 2048 to 2 kB.
|
|
*/
|
|
public static function humanFileSize( $bytes ){
|
|
if( $bytes < 1024 ){
|
|
return "$bytes B";
|
|
}
|
|
$bytes = round( $bytes / 1024, 1 );
|
|
if( $bytes < 1024 ){
|
|
return "$bytes kB";
|
|
}
|
|
$bytes = round( $bytes / 1024, 1 );
|
|
if( $bytes < 1024 ){
|
|
return "$bytes MB";
|
|
}
|
|
|
|
// Wow, heavy duty for owncloud
|
|
$bytes = round( $bytes / 1024, 1 );
|
|
return "$bytes GB";
|
|
}
|
|
|
|
/**
|
|
* @brief Make a computer file size
|
|
* @param $str file size in a fancy format
|
|
* @returns a file size in bytes
|
|
*
|
|
* Makes 2kB to 2048.
|
|
*
|
|
* Inspired by: http://www.php.net/manual/en/function.filesize.php#92418
|
|
*/
|
|
public static function computerFileSize( $str ){
|
|
$bytes = 0;
|
|
$str=strtolower($str);
|
|
|
|
$bytes_array = array(
|
|
'b' => 1,
|
|
'k' => 1024,
|
|
'kb' => 1024,
|
|
'mb' => 1024 * 1024,
|
|
'm' => 1024 * 1024,
|
|
'gb' => 1024 * 1024 * 1024,
|
|
'g' => 1024 * 1024 * 1024,
|
|
'tb' => 1024 * 1024 * 1024 * 1024,
|
|
't' => 1024 * 1024 * 1024 * 1024,
|
|
'pb' => 1024 * 1024 * 1024 * 1024 * 1024,
|
|
'p' => 1024 * 1024 * 1024 * 1024 * 1024,
|
|
);
|
|
|
|
$bytes = floatval($str);
|
|
|
|
if (preg_match('#([kmgtp]?b?)$#si', $str, $matches) && !empty($bytes_array[$matches[1]])) {
|
|
$bytes *= $bytes_array[$matches[1]];
|
|
}
|
|
|
|
$bytes = round($bytes, 2);
|
|
|
|
return $bytes;
|
|
}
|
|
|
|
/**
|
|
* @brief Recusive editing of file permissions
|
|
* @param $path path to file or folder
|
|
* @param $filemode unix style file permissions as integer
|
|
*
|
|
*/
|
|
static function chmodr($path, $filemode) {
|
|
if (!is_dir($path))
|
|
return chmod($path, $filemode);
|
|
$dh = opendir($path);
|
|
while (($file = readdir($dh)) !== false) {
|
|
if($file != '.' && $file != '..') {
|
|
$fullpath = $path.'/'.$file;
|
|
if(is_link($fullpath))
|
|
return FALSE;
|
|
elseif(!is_dir($fullpath) && !@chmod($fullpath, $filemode))
|
|
return FALSE;
|
|
elseif(!self::chmodr($fullpath, $filemode))
|
|
return FALSE;
|
|
}
|
|
}
|
|
closedir($dh);
|
|
if(@chmod($path, $filemode))
|
|
return TRUE;
|
|
else
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* @brief Recusive copying of folders
|
|
* @param string $src source folder
|
|
* @param string $dest target folder
|
|
*
|
|
*/
|
|
static function copyr($src, $dest) {
|
|
if(is_dir($src)){
|
|
if(!is_dir($dest)){
|
|
mkdir($dest);
|
|
}
|
|
$files = scandir($src);
|
|
foreach ($files as $file){
|
|
if ($file != "." && $file != ".."){
|
|
self::copyr("$src/$file", "$dest/$file");
|
|
}
|
|
}
|
|
}elseif(file_exists($src)){
|
|
copy($src, $dest);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Recusive deletion of folders
|
|
* @param string $dir path to the folder
|
|
*
|
|
*/
|
|
static function rmdirr($dir) {
|
|
if(is_dir($dir)) {
|
|
$files=scandir($dir);
|
|
foreach($files as $file){
|
|
if ($file != "." && $file != ".."){
|
|
self::rmdirr("$dir/$file");
|
|
}
|
|
}
|
|
rmdir($dir);
|
|
}elseif(file_exists($dir)){
|
|
unlink($dir);
|
|
}
|
|
if(file_exists($dir)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* get the mimetype form a local file
|
|
* @param string path
|
|
* @return string
|
|
* does NOT work for ownClouds filesystem, use OC_FileSystem::getMimeType instead
|
|
*/
|
|
static function getMimeType($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($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){
|
|
$mimeType=substr($info,0,strpos($info,';'));
|
|
}
|
|
finfo_close($finfo);
|
|
}
|
|
if (!$isWrapped and $mimeType=='application/octet-stream' && function_exists("mime_content_type")) {
|
|
// use mime magic extension if available
|
|
$mimeType = mime_content_type($path);
|
|
}
|
|
if (!$isWrapped and $mimeType=='application/octet-stream' && OC_Helper::canExecute("file")) {
|
|
// it looks like we have a 'file' command,
|
|
// lets see it it does have mime support
|
|
$path=escapeshellarg($path);
|
|
$fp = popen("file -i -b $path 2>/dev/null", "r");
|
|
$reply = fgets($fp);
|
|
pclose($fp);
|
|
|
|
//trim the character set from the end of the response
|
|
$mimeType=substr($reply,0,strrpos($reply,' '));
|
|
}
|
|
if ($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 $mimeType;
|
|
}
|
|
|
|
/**
|
|
* get the mimetype form a data string
|
|
* @param string data
|
|
* @return string
|
|
*/
|
|
static function getStringMimeType($data){
|
|
if(function_exists('finfo_open') and function_exists('finfo_file')){
|
|
$finfo=finfo_open(FILEINFO_MIME);
|
|
return finfo_buffer($finfo, $data);
|
|
}else{
|
|
$tmpFile=OC_Helper::tmpFile();
|
|
$fh=fopen($tmpFile,'wb');
|
|
fwrite($fh,$data,8024);
|
|
fclose($fh);
|
|
$mime=self::getMimeType($tmpFile);
|
|
unset($tmpFile);
|
|
return $mime;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Checks $_REQUEST contains a var for the $s key. If so, returns the html-escaped value of this var; otherwise returns the default value provided by $d.
|
|
* @param $s name of the var to escape, if set.
|
|
* @param $d default value.
|
|
* @returns the print-safe value.
|
|
*
|
|
*/
|
|
|
|
//FIXME: should also check for value validation (i.e. the email is an email).
|
|
public static function init_var($s, $d="") {
|
|
$r = $d;
|
|
if(isset($_REQUEST[$s]) && !empty($_REQUEST[$s]))
|
|
$r = stripslashes(htmlspecialchars($_REQUEST[$s]));
|
|
|
|
return $r;
|
|
}
|
|
|
|
/**
|
|
* returns "checked"-attribut if request contains selected radio element OR if radio element is the default one -- maybe?
|
|
* @param string $s Name of radio-button element name
|
|
* @param string $v Value of current radio-button element
|
|
* @param string $d Value of default radio-button element
|
|
*/
|
|
public static function init_radio($s, $v, $d) {
|
|
if((isset($_REQUEST[$s]) && $_REQUEST[$s]==$v) || (!isset($_REQUEST[$s]) && $v == $d))
|
|
print "checked=\"checked\" ";
|
|
}
|
|
|
|
/**
|
|
* detect if a given program is found in the search PATH
|
|
*
|
|
* @param string program name
|
|
* @param string optional search path, defaults to $PATH
|
|
* @return bool true if executable program found in path
|
|
*/
|
|
public static function canExecute($name, $path = false){
|
|
// path defaults to PATH from environment if not set
|
|
if ($path === false) {
|
|
$path = getenv("PATH");
|
|
}
|
|
// check method depends on operating system
|
|
if (!strncmp(PHP_OS, "WIN", 3)) {
|
|
// on Windows an appropriate COM or EXE file needs to exist
|
|
$exts = array(".exe", ".com");
|
|
$check_fn = "file_exists";
|
|
} else {
|
|
// anywhere else we look for an executable file of that name
|
|
$exts = array("");
|
|
$check_fn = "is_executable";
|
|
}
|
|
// Default check will be done with $path directories :
|
|
$dirs = explode(PATH_SEPARATOR, $path);
|
|
// WARNING : We have to check if open_basedir is enabled :
|
|
$obd = ini_get('open_basedir');
|
|
if($obd != "none")
|
|
$obd_values = explode(PATH_SEPARATOR, $obd);
|
|
if(count($obd_values) > 0 and $obd_values[0])
|
|
{
|
|
// open_basedir is in effect !
|
|
// We need to check if the program is in one of these dirs :
|
|
$dirs = $obd_values;
|
|
}
|
|
foreach($dirs as $dir)
|
|
{
|
|
foreach($exts as $ext)
|
|
{
|
|
if($check_fn("$dir/$name".$ext))
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* copy the contents of one stream to another
|
|
* @param resource source
|
|
* @param resource target
|
|
* @return int the number of bytes copied
|
|
*/
|
|
public static function streamCopy($source,$target){
|
|
if(!$source or !$target){
|
|
return false;
|
|
}
|
|
$count=0;
|
|
while(!feof($source)){
|
|
$count+=fwrite($target,fread($source,8192));
|
|
}
|
|
return $count;
|
|
}
|
|
|
|
/**
|
|
* create a temporary file with an unique filename
|
|
* @param string postfix
|
|
* @return string
|
|
*
|
|
* temporary files are automatically cleaned up after the script is finished
|
|
*/
|
|
public static function tmpFile($postfix=''){
|
|
$file=get_temp_dir().'/'.md5(time().rand()).$postfix;
|
|
$fh=fopen($file,'w');
|
|
fclose($fh);
|
|
self::$tmpFiles[]=$file;
|
|
return $file;
|
|
}
|
|
|
|
/**
|
|
* create a temporary folder with an unique filename
|
|
* @return string
|
|
*
|
|
* temporary files are automatically cleaned up after the script is finished
|
|
*/
|
|
public static function tmpFolder(){
|
|
$path=get_temp_dir().'/'.md5(time().rand());
|
|
mkdir($path);
|
|
self::$tmpFiles[]=$path;
|
|
return $path.'/';
|
|
}
|
|
|
|
/**
|
|
* remove all files created by self::tmpFile
|
|
*/
|
|
public static function cleanTmp(){
|
|
$leftoversFile=get_temp_dir().'/oc-not-deleted';
|
|
if(file_exists($leftoversFile)){
|
|
$leftovers=file($leftoversFile);
|
|
foreach($leftovers as $file) {
|
|
self::rmdirr($file);
|
|
}
|
|
unlink($leftoversFile);
|
|
}
|
|
|
|
foreach(self::$tmpFiles as $file){
|
|
if(file_exists($file)){
|
|
if(!self::rmdirr($file)) {
|
|
file_put_contents($leftoversFile, $file."\n", FILE_APPEND);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Adds a suffix to the name in case the file exists
|
|
*
|
|
* @param $path
|
|
* @param $filename
|
|
* @return string
|
|
*/
|
|
public static function buildNotExistingFileName($path, $filename){
|
|
if($path==='/'){
|
|
$path='';
|
|
}
|
|
if ($pos = strrpos($filename, '.')) {
|
|
$name = substr($filename, 0, $pos);
|
|
$ext = substr($filename, $pos);
|
|
} else {
|
|
$name = $filename;
|
|
}
|
|
|
|
$newpath = $path . '/' . $filename;
|
|
$newname = $filename;
|
|
$counter = 2;
|
|
while (OC_Filesystem::file_exists($newpath)) {
|
|
$newname = $name . ' (' . $counter . ')' . $ext;
|
|
$newpath = $path . '/' . $newname;
|
|
$counter++;
|
|
}
|
|
|
|
return $newpath;
|
|
}
|
|
|
|
/*
|
|
* checks if $sub is a subdirectory of $parent
|
|
*
|
|
* @param $sub
|
|
* @param $parent
|
|
* @return bool
|
|
*/
|
|
public static function issubdirectory($sub, $parent){
|
|
if($sub == null || $sub == '' || $parent == null || $parent == ''){
|
|
return false;
|
|
}
|
|
$realpath_sub = realpath($sub);
|
|
$realpath_parent = realpath($parent);
|
|
if(($realpath_sub == false && substr_count($realpath_sub, './') != 0) || ($realpath_parent == false && substr_count($realpath_parent, './') != 0)){ //it checks for both ./ and ../
|
|
return false;
|
|
}
|
|
if($realpath_sub && $realpath_sub != '' && $realpath_parent && $realpath_parent != ''){
|
|
if(substr($realpath_sub, 0, strlen($realpath_parent)) == $realpath_parent){
|
|
return true;
|
|
}
|
|
}else{
|
|
if(substr($sub, 0, strlen($parent)) == $parent){
|
|
return true;
|
|
}
|
|
}
|
|
/*echo 'SUB: ' . $sub . "\n";
|
|
echo 'PAR: ' . $parent . "\n";
|
|
echo 'REALSUB: ' . $realpath_sub . "\n";
|
|
echo 'REALPAR: ' . $realpath_parent . "\n";
|
|
echo substr($realpath_sub, 0, strlen($realpath_parent));
|
|
exit;*/
|
|
return false;
|
|
}
|
|
}
|