589 lines
16 KiB
PHP
589 lines
16 KiB
PHP
<?php
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/**
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* ownCloud
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*
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* @author Frank Karlitschek
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* @author Jakob Sack
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* @copyright 2010 Frank Karlitschek karlitschek@kde.org
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* Collection of useful functions
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*/
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class OC_Helper {
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private static $mimetypes=array();
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private static $tmpFiles=array();
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/**
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* @brief Creates an url
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* @param $app app
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* @param $file file
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* @returns the url
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*
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* Returns a url to the given app and file.
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*/
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public static function linkTo( $app, $file ){
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if( $app != '' ){
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$app .= '/';
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// Check if the app is in the app folder
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if( file_exists( OC::$APPSROOT . '/apps/'. $app.$file )){
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if(substr($file, -3) == 'php' || substr($file, -3) == 'css'){
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if(substr($app, -1, 1) == '/'){
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$app = substr($app, 0, strlen($app) - 1);
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}
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$urlLinkTo = OC::$WEBROOT . '/?app=' . $app;
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$urlLinkTo .= ($file!='index.php')?'&getfile=' . urlencode($file):'';
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}else{
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$urlLinkTo = OC::$APPSWEBROOT . '/apps/' . $app . $file;
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}
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}
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else{
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$urlLinkTo = OC::$WEBROOT . '/' . $app . $file;
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}
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}
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else{
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if( file_exists( OC::$SERVERROOT . '/core/'. $file )){
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$urlLinkTo = OC::$WEBROOT . '/core/'.$file;
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}
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else{
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$urlLinkTo = OC::$WEBROOT . '/'.$file;
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}
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}
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return $urlLinkTo;
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}
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/**
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* @brief Returns the server host
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* @returns the server host
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*
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* Returns the server host, even if the website uses one or more
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* reverse proxies
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*/
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public static function serverHost() {
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if (isset($_SERVER['HTTP_X_FORWARDED_HOST'])) {
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if (strpos($_SERVER['HTTP_X_FORWARDED_HOST'], ",") !== false) {
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$host = trim(array_pop(explode(",", $_SERVER['HTTP_X_FORWARDED_HOST'])));
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}
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else{
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$host=$_SERVER['HTTP_X_FORWARDED_HOST'];
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}
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}
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else{
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$host = $_SERVER['HTTP_HOST'];
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}
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return $host;
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}
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/**
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* @brief Creates an absolute url
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* @param $app app
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* @param $file file
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* @returns the url
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*
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* Returns a absolute url to the given app and file.
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*/
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public static function linkToAbsolute( $app, $file ) {
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$urlLinkTo = self::linkTo( $app, $file );
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// Checking if the request was made through HTTPS. The last in line is for IIS
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$protocol = isset($_SERVER['HTTPS']) && !empty($_SERVER['HTTPS']) && ($_SERVER['HTTPS']!='off');
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$urlLinkTo = ($protocol?'https':'http') . '://' . self::serverHost() . $urlLinkTo;
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return $urlLinkTo;
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}
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/**
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* @brief Creates path to an image
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* @param $app app
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* @param $image image name
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* @returns the url
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*
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* Returns the path to the image.
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*/
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public static function imagePath( $app, $image ){
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// Read the selected theme from the config file
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$theme=OC_Config::getValue( "theme" );
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// Check if the app is in the app folder
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if( file_exists( OC::$SERVERROOT."/themes/$theme/apps/$app/img/$image" )){
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return OC::$WEBROOT."/themes/$theme/apps/$app/img/$image";
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}elseif( file_exists( OC::$APPSROOT."/apps/$app/img/$image" )){
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return OC::$APPSWEBROOT."/apps/$app/img/$image";
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}elseif( !empty( $app ) and file_exists( OC::$SERVERROOT."/themes/$theme/$app/img/$image" )){
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return OC::$WEBROOT."/themes/$theme/$app/img/$image";
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}elseif( !empty( $app ) and file_exists( OC::$SERVERROOT."/$app/img/$image" )){
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return OC::$WEBROOT."/$app/img/$image";
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}elseif( file_exists( OC::$SERVERROOT."/themes/$theme/core/img/$image" )){
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return OC::$WEBROOT."/themes/$theme/core/img/$image";
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}elseif( file_exists( OC::$SERVERROOT."/core/img/$image" )){
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return OC::$WEBROOT."/core/img/$image";
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}else{
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echo('image not found: image:'.$image.' webroot:'.OC::$WEBROOT.' serverroot:'.OC::$SERVERROOT);
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die();
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}
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}
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/**
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* @brief get path to icon of file type
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* @param $mimetype mimetype
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* @returns the url
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*
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* Returns the path to the image of this file type.
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*/
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public static function mimetypeIcon( $mimetype ){
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$alias=array('application/xml'=>'code/xml');
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// echo $mimetype;
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if(isset($alias[$mimetype])){
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$mimetype=$alias[$mimetype];
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// echo $mimetype;
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}
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// Replace slash with a minus
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$mimetype = str_replace( "/", "-", $mimetype );
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// Is it a dir?
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if( $mimetype == "dir" ){
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return OC::$WEBROOT."/core/img/filetypes/folder.png";
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}
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// Icon exists?
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if( file_exists( OC::$SERVERROOT."/core/img/filetypes/$mimetype.png" )){
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return OC::$WEBROOT."/core/img/filetypes/$mimetype.png";
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}
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//try only the first part of the filetype
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$mimetype=substr($mimetype,0,strpos($mimetype,'-'));
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if( file_exists( OC::$SERVERROOT."/core/img/filetypes/$mimetype.png" )){
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return OC::$WEBROOT."/core/img/filetypes/$mimetype.png";
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}
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else{
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return OC::$WEBROOT."/core/img/filetypes/file.png";
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}
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}
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/**
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* @brief Make a human file size
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* @param $bytes file size in bytes
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* @returns a human readable file size
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*
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* Makes 2048 to 2 kB.
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*/
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public static function humanFileSize( $bytes ){
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if( $bytes < 1024 ){
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return "$bytes B";
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}
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$bytes = round( $bytes / 1024, 1 );
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if( $bytes < 1024 ){
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return "$bytes kB";
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}
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$bytes = round( $bytes / 1024, 1 );
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if( $bytes < 1024 ){
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return "$bytes MB";
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}
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// Wow, heavy duty for owncloud
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$bytes = round( $bytes / 1024, 1 );
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return "$bytes GB";
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}
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/**
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* @brief Make a computer file size
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* @param $str file size in a fancy format
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* @returns a file size in bytes
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*
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* Makes 2kB to 2048.
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*
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* Inspired by: http://www.php.net/manual/en/function.filesize.php#92418
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*/
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public static function computerFileSize( $str ){
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$bytes = 0;
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$str=strtolower($str);
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$bytes_array = array(
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'b' => 1,
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'k' => 1024,
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'kb' => 1024,
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'mb' => 1024 * 1024,
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'm' => 1024 * 1024,
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'gb' => 1024 * 1024 * 1024,
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'g' => 1024 * 1024 * 1024,
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'tb' => 1024 * 1024 * 1024 * 1024,
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't' => 1024 * 1024 * 1024 * 1024,
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'pb' => 1024 * 1024 * 1024 * 1024 * 1024,
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'p' => 1024 * 1024 * 1024 * 1024 * 1024,
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);
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$bytes = floatval($str);
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if (preg_match('#([kmgtp]?b?)$#si', $str, $matches) && !empty($bytes_array[$matches[1]])) {
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$bytes *= $bytes_array[$matches[1]];
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}
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$bytes = round($bytes, 2);
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return $bytes;
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}
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/**
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* @brief Recusive editing of file permissions
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* @param $path path to file or folder
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* @param $filemode unix style file permissions as integer
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*
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*/
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static function chmodr($path, $filemode) {
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if (!is_dir($path))
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return chmod($path, $filemode);
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$dh = opendir($path);
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while (($file = readdir($dh)) !== false) {
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if($file != '.' && $file != '..') {
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$fullpath = $path.'/'.$file;
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if(is_link($fullpath))
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return FALSE;
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elseif(!is_dir($fullpath) && !@chmod($fullpath, $filemode))
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return FALSE;
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elseif(!self::chmodr($fullpath, $filemode))
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return FALSE;
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}
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}
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closedir($dh);
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if(@chmod($path, $filemode))
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return TRUE;
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else
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return FALSE;
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}
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/**
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* @brief Recusive copying of folders
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* @param string $src source folder
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* @param string $dest target folder
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*
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*/
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static function copyr($src, $dest) {
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if(is_dir($src)){
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if(!is_dir($dest)){
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mkdir($dest);
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}
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$files = scandir($src);
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foreach ($files as $file){
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if ($file != "." && $file != ".."){
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self::copyr("$src/$file", "$dest/$file");
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}
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}
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}elseif(file_exists($src)){
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copy($src, $dest);
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}
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}
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/**
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* @brief Recusive deletion of folders
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* @param string $dir path to the folder
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*
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*/
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static function rmdirr($dir) {
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if(is_dir($dir)) {
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$files=scandir($dir);
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foreach($files as $file){
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if ($file != "." && $file != ".."){
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self::rmdirr("$dir/$file");
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}
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}
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rmdir($dir);
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}elseif(file_exists($dir)){
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unlink($dir);
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}
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if(file_exists($dir)) {
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return false;
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}
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}
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/**
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* get the mimetype form a local file
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* @param string path
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* @return string
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* does NOT work for ownClouds filesystem, use OC_FileSystem::getMimeType instead
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*/
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static function getMimeType($path){
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$isWrapped=(strpos($path,'://')!==false) and (substr($path,0,7)=='file://');
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$mimeType='application/octet-stream';
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if ($mimeType=='application/octet-stream') {
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self::$mimetypes = include('mimetypes.fixlist.php');
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$extension=strtolower(strrchr(basename($path), "."));
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$extension=substr($extension,1);//remove leading .
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$mimeType=(isset(self::$mimetypes[$extension]))?self::$mimetypes[$extension]:'application/octet-stream';
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}
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if (@is_dir($path)) {
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// directories are easy
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return "httpd/unix-directory";
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}
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if($mimeType=='application/octet-stream' and function_exists('finfo_open') and function_exists('finfo_file') and $finfo=finfo_open(FILEINFO_MIME)){
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$info = @strtolower(finfo_file($finfo,$path));
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if($info){
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$mimeType=substr($info,0,strpos($info,';'));
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}
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finfo_close($finfo);
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}
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if (!$isWrapped and $mimeType=='application/octet-stream' && function_exists("mime_content_type")) {
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// use mime magic extension if available
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$mimeType = mime_content_type($path);
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}
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if (!$isWrapped and $mimeType=='application/octet-stream' && OC_Helper::canExecute("file")) {
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// it looks like we have a 'file' command,
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// lets see it it does have mime support
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$path=escapeshellarg($path);
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$fp = popen("file -i -b $path 2>/dev/null", "r");
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$reply = fgets($fp);
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pclose($fp);
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//trim the character set from the end of the response
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$mimeType=substr($reply,0,strrpos($reply,' '));
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}
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if ($mimeType=='application/octet-stream') {
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// Fallback solution: (try to guess the type by the file extension
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if(!self::$mimetypes || self::$mimetypes != include('mimetypes.list.php')){
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self::$mimetypes=include('mimetypes.list.php');
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}
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$extension=strtolower(strrchr(basename($path), "."));
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$extension=substr($extension,1);//remove leading .
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$mimeType=(isset(self::$mimetypes[$extension]))?self::$mimetypes[$extension]:'application/octet-stream';
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}
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return $mimeType;
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}
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/**
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* get the mimetype form a data string
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* @param string data
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* @return string
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*/
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static function getStringMimeType($data){
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if(function_exists('finfo_open') and function_exists('finfo_file')){
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$finfo=finfo_open(FILEINFO_MIME);
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return finfo_buffer($finfo, $data);
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}else{
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$tmpFile=OC_Helper::tmpFile();
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$fh=fopen($tmpFile,'wb');
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fwrite($fh,$data,8024);
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fclose($fh);
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$mime=self::getMimeType($tmpFile);
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unset($tmpFile);
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return $mime;
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}
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}
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/**
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* @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.
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* @param $s name of the var to escape, if set.
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* @param $d default value.
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* @returns the print-safe value.
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*
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*/
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//FIXME: should also check for value validation (i.e. the email is an email).
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public static function init_var($s, $d="") {
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$r = $d;
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if(isset($_REQUEST[$s]) && !empty($_REQUEST[$s]))
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$r = stripslashes(htmlspecialchars($_REQUEST[$s]));
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return $r;
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}
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/**
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* returns "checked"-attribut if request contains selected radio element OR if radio element is the default one -- maybe?
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* @param string $s Name of radio-button element name
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* @param string $v Value of current radio-button element
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* @param string $d Value of default radio-button element
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*/
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public static function init_radio($s, $v, $d) {
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if((isset($_REQUEST[$s]) && $_REQUEST[$s]==$v) || (!isset($_REQUEST[$s]) && $v == $d))
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print "checked=\"checked\" ";
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}
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/**
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* detect if a given program is found in the search PATH
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*
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* @param string program name
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* @param string optional search path, defaults to $PATH
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* @return bool true if executable program found in path
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*/
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public static function canExecute($name, $path = false){
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// path defaults to PATH from environment if not set
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if ($path === false) {
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$path = getenv("PATH");
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}
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// check method depends on operating system
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if (!strncmp(PHP_OS, "WIN", 3)) {
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// on Windows an appropriate COM or EXE file needs to exist
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$exts = array(".exe", ".com");
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$check_fn = "file_exists";
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} else {
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// anywhere else we look for an executable file of that name
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$exts = array("");
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$check_fn = "is_executable";
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}
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// Default check will be done with $path directories :
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$dirs = explode(PATH_SEPARATOR, $path);
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// WARNING : We have to check if open_basedir is enabled :
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$obd = ini_get('open_basedir');
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if($obd != "none")
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$obd_values = explode(PATH_SEPARATOR, $obd);
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if(count($obd_values) > 0 and $obd_values[0])
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{
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// open_basedir is in effect !
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// We need to check if the program is in one of these dirs :
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$dirs = $obd_values;
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}
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foreach($dirs as $dir)
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{
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foreach($exts as $ext)
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{
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if($check_fn("$dir/$name".$ext))
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return true;
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}
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}
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return false;
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}
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/**
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* copy the contents of one stream to another
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* @param resource source
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* @param resource target
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* @return int the number of bytes copied
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*/
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public static function streamCopy($source,$target){
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if(!$source or !$target){
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return false;
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}
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$count=0;
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while(!feof($source)){
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$count+=fwrite($target,fread($source,8192));
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}
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return $count;
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}
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/**
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* create a temporary file with an unique filename
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* @param string postfix
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* @return string
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*
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* temporary files are automatically cleaned up after the script is finished
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*/
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public static function tmpFile($postfix=''){
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$file=get_temp_dir().'/'.md5(time().rand()).$postfix;
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$fh=fopen($file,'w');
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fclose($fh);
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self::$tmpFiles[]=$file;
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return $file;
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}
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/**
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* create a temporary folder with an unique filename
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* @return string
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*
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* temporary files are automatically cleaned up after the script is finished
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*/
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public static function tmpFolder(){
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$path=get_temp_dir().'/'.md5(time().rand());
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mkdir($path);
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self::$tmpFiles[]=$path;
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return $path.'/';
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}
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/**
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* remove all files created by self::tmpFile
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*/
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public static function cleanTmp(){
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$leftoversFile='/tmp/oc-not-deleted';
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if(file_exists($leftoversFile)){
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$leftovers=file($leftoversFile);
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foreach($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;
|
|
}
|
|
}
|