428 lines
12 KiB
PHP
428 lines
12 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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* @copyright 2012 Frank Karlitschek frank@owncloud.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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* Class for fileserver access
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*
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*/
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class OC_Files {
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static $tmpFiles=array();
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/**
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* get the content of a directory
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* @param dir $directory path under datadirectory
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*/
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public static function getDirectoryContent($directory, $mimetype_filter = ''){
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$files = array();
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if (substr($directory, 0, 7) == '/Shared') {
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if ($directory == '/Shared') {
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$files = OCP\Share::getItemsSharedWith('file', OC_Share_Backend_File::FORMAT_FILE_APP, array('mimetype_filter' => $mimetype_filter));
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} else {
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$pos = strpos($directory, '/', 8);
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// Get shared folder name
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if ($pos !== false) {
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$itemTarget = substr($directory, 0, $pos);
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} else {
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$itemTarget = $directory;
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}
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$files = OCP\Share::getItemSharedWith('folder', $itemTarget, OC_Share_Backend_File::FORMAT_FILE_APP, array('folder' => $directory, 'mimetype_filter' => $mimetype_filter));
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}
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} else {
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$files = OC_FileCache::getFolderContent($directory, false, $mimetype_filter);
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if ($directory == '') {
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// Add 'Shared' folder
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$files = array_merge($files, OCP\Share::getItemsSharedWith('file', OC_Share_Backend_File::FORMAT_FILE_APP_ROOT));
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}
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}
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foreach ($files as &$file) {
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$file['directory'] = $directory;
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$file['type'] = ($file['mimetype'] == 'httpd/unix-directory') ? 'dir' : 'file';
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}
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usort($files, "fileCmp");//TODO: remove this once ajax is merged
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return $files;
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}
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/**
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* return the content of a file or return a zip file containning multiply files
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*
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* @param dir $dir
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* @param file $file ; seperated list of files to download
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* @param boolean $only_header ; boolean to only send header of the request
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*/
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public static function get($dir,$files, $only_header = false){
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if(strpos($files,';')){
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$files=explode(';',$files);
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}
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if(is_array($files)){
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self::validateZipDownload($dir,$files);
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$executionTime = intval(ini_get('max_execution_time'));
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set_time_limit(0);
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$zip = new ZipArchive();
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$filename = OC_Helper::tmpFile('.zip');
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if ($zip->open($filename, ZIPARCHIVE::CREATE | ZIPARCHIVE::OVERWRITE)!==TRUE) {
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exit("cannot open <$filename>\n");
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}
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foreach($files as $file){
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$file=$dir.'/'.$file;
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if(OC_Filesystem::is_file($file)){
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$tmpFile=OC_Filesystem::toTmpFile($file);
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self::$tmpFiles[]=$tmpFile;
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$zip->addFile($tmpFile,basename($file));
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}elseif(OC_Filesystem::is_dir($file)){
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self::zipAddDir($file,$zip);
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}
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}
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$zip->close();
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set_time_limit($executionTime);
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}elseif(OC_Filesystem::is_dir($dir.'/'.$files)){
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self::validateZipDownload($dir,$files);
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$executionTime = intval(ini_get('max_execution_time'));
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set_time_limit(0);
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$zip = new ZipArchive();
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$filename = OC_Helper::tmpFile('.zip');
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if ($zip->open($filename, ZIPARCHIVE::CREATE | ZIPARCHIVE::OVERWRITE)!==TRUE) {
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exit("cannot open <$filename>\n");
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}
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$file=$dir.'/'.$files;
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self::zipAddDir($file,$zip);
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$zip->close();
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set_time_limit($executionTime);
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}else{
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$zip=false;
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$filename=$dir.'/'.$files;
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}
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@ob_end_clean();
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if($zip or OC_Filesystem::is_readable($filename)){
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header('Content-Disposition: attachment; filename="'.basename($filename).'"');
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header('Content-Transfer-Encoding: binary');
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OC_Response::disableCaching();
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if($zip){
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ini_set('zlib.output_compression', 'off');
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header('Content-Type: application/zip');
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header('Content-Length: ' . filesize($filename));
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}else{
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header('Content-Type: '.OC_Filesystem::getMimeType($filename));
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}
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}elseif($zip or !OC_Filesystem::file_exists($filename)){
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header("HTTP/1.0 404 Not Found");
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$tmpl = new OC_Template( '', '404', 'guest' );
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$tmpl->assign('file',$filename);
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$tmpl->printPage();
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}else{
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header("HTTP/1.0 403 Forbidden");
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die('403 Forbidden');
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}
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if($only_header){
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if(!$zip)
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header("Content-Length: ".OC_Filesystem::filesize($filename));
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return ;
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}
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if($zip){
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$handle=fopen($filename,'r');
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if ($handle) {
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$chunkSize = 8*1024;// 1 MB chunks
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while (!feof($handle)) {
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echo fread($handle, $chunkSize);
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flush();
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}
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}
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unlink($filename);
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}else{
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OC_Filesystem::readfile($filename);
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}
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foreach(self::$tmpFiles as $tmpFile){
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if(file_exists($tmpFile) and is_file($tmpFile)){
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unlink($tmpFile);
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}
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}
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}
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public static function zipAddDir($dir,$zip,$internalDir=''){
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$dirname=basename($dir);
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$zip->addEmptyDir($internalDir.$dirname);
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$internalDir.=$dirname.='/';
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$files=OC_Files::getdirectorycontent($dir);
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foreach($files as $file){
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$filename=$file['name'];
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$file=$dir.'/'.$filename;
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if(OC_Filesystem::is_file($file)){
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$tmpFile=OC_Filesystem::toTmpFile($file);
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OC_Files::$tmpFiles[]=$tmpFile;
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$zip->addFile($tmpFile,$internalDir.$filename);
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}elseif(OC_Filesystem::is_dir($file)){
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self::zipAddDir($file,$zip,$internalDir);
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}
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}
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}
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/**
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* move a file or folder
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*
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* @param dir $sourceDir
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* @param file $source
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* @param dir $targetDir
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* @param file $target
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*/
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public static function move($sourceDir,$source,$targetDir,$target){
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if(OC_User::isLoggedIn() && ($sourceDir != '' || $source != 'Shared') && !OC_Filesystem::file_exists($targetDir.'/'.$target)){
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$targetFile=self::normalizePath($targetDir.'/'.$target);
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$sourceFile=self::normalizePath($sourceDir.'/'.$source);
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return OC_Filesystem::rename($sourceFile,$targetFile);
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} else {
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return false;
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}
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}
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/**
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* copy a file or folder
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*
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* @param dir $sourceDir
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* @param file $source
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* @param dir $targetDir
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* @param file $target
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*/
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public static function copy($sourceDir,$source,$targetDir,$target){
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if(OC_User::isLoggedIn()){
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$targetFile=$targetDir.'/'.$target;
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$sourceFile=$sourceDir.'/'.$source;
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return OC_Filesystem::copy($sourceFile,$targetFile);
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}
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}
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/**
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* create a new file or folder
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*
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* @param dir $dir
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* @param file $name
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* @param type $type
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*/
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public static function newFile($dir,$name,$type){
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if(OC_User::isLoggedIn()){
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$file=$dir.'/'.$name;
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if($type=='dir'){
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return OC_Filesystem::mkdir($file);
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}elseif($type=='file'){
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$fileHandle=OC_Filesystem::fopen($file, 'w');
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if($fileHandle){
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fclose($fileHandle);
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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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}
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}
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/**
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* deletes a file or folder
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*
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* @param dir $dir
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* @param file $name
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*/
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public static function delete($dir,$file){
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if(OC_User::isLoggedIn() && ($dir!= '' || $file != 'Shared')) {
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$file=$dir.'/'.$file;
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return OC_Filesystem::unlink($file);
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}
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}
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/**
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* checks if the selected files are within the size constraint. If not, outputs an error page.
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*
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* @param dir $dir
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* @param files $files
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*/
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static function validateZipDownload($dir, $files) {
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if(!OC_Config::getValue('allowZipDownload', true)) {
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$l = OC_L10N::get('files');
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header("HTTP/1.0 409 Conflict");
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$tmpl = new OC_Template( '', 'error', 'user' );
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$errors = array(
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array(
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'error' => $l->t('ZIP download is turned off.'),
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'hint' => $l->t('Files need to be downloaded one by one.') . '<br/><a href="javascript:history.back()">' . $l->t('Back to Files') . '</a>',
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)
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);
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$tmpl->assign('errors', $errors);
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$tmpl->printPage();
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exit;
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}
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$zipLimit = OC_Config::getValue('maxZipInputSize', OC_Helper::computerFileSize('800 MB'));
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if($zipLimit > 0) {
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$totalsize = 0;
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if(is_array($files)){
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foreach($files as $file){
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$totalsize += OC_Filesystem::filesize($dir.'/'.$file);
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}
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}else{
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$totalsize += OC_Filesystem::filesize($dir.'/'.$files);
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}
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if($totalsize > $zipLimit) {
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$l = OC_L10N::get('files');
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header("HTTP/1.0 409 Conflict");
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$tmpl = new OC_Template( '', 'error', 'user' );
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$errors = array(
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array(
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'error' => $l->t('Selected files too large to generate zip file.'),
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'hint' => 'Download the files in smaller chunks, seperately or kindly ask your administrator.<br/><a href="javascript:history.back()">' . $l->t('Back to Files') . '</a>',
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)
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);
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$tmpl->assign('errors', $errors);
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$tmpl->printPage();
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exit;
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}
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}
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}
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/**
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* try to detect the mime type of a file
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*
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* @param string path
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* @return string guessed mime type
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*/
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static function getMimeType($path){
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return OC_Filesystem::getMimeType($path);
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}
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/**
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* get a file tree
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*
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* @param string path
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* @return array
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*/
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static function getTree($path){
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return OC_Filesystem::getTree($path);
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}
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/**
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* pull a file from a remote server
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* @param string source
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* @param string token
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* @param string dir
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* @param string file
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* @return string guessed mime type
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*/
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static function pull($source,$token,$dir,$file){
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$tmpfile=tempnam(get_temp_dir(),'remoteCloudFile');
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$fp=fopen($tmpfile,'w+');
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$url=$source.="/files/pull.php?token=$token";
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$ch=curl_init();
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curl_setopt($ch,CURLOPT_URL,$url);
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curl_setopt($ch, CURLOPT_FILE, $fp);
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curl_exec($ch);
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fclose($fp);
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$info=curl_getinfo($ch);
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$httpCode=$info['http_code'];
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curl_close($ch);
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if($httpCode==200 or $httpCode==0){
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OC_Filesystem::fromTmpFile($tmpfile,$dir.'/'.$file);
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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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/**
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* set the maximum upload size limit for apache hosts using .htaccess
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* @param int size filesisze in bytes
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* @return false on failure, size on success
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*/
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static function setUploadLimit($size){
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//don't allow user to break his config -- upper boundary
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if($size > PHP_INT_MAX) {
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//max size is always 1 byte lower than computerFileSize returns
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if($size > PHP_INT_MAX+1)
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return false;
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$size -=1;
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} else {
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$size=OC_Helper::humanFileSize($size);
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$size=substr($size,0,-1);//strip the B
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$size=str_replace(' ','',$size); //remove the space between the size and the postfix
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}
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//don't allow user to break his config -- broken or malicious size input
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if(intval($size) == 0) {
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return false;
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}
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$htaccess = @file_get_contents(OC::$SERVERROOT.'/.htaccess'); //supress errors in case we don't have permissions for
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if(!$htaccess) {
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return false;
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}
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$phpValueKeys = array(
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'upload_max_filesize',
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'post_max_size'
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);
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foreach($phpValueKeys as $key) {
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$pattern = '/php_value '.$key.' (\S)*/';
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$setting = 'php_value '.$key.' '.$size;
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$hasReplaced = 0;
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$content = preg_replace($pattern, $setting, $htaccess, 1, $hasReplaced);
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if($content !== NULL) {
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$htaccess = $content;
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}
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if($hasReplaced == 0) {
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$htaccess .= "\n" . $setting;
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}
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}
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//check for write permissions
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if(is_writable(OC::$SERVERROOT.'/.htaccess')) {
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file_put_contents(OC::$SERVERROOT.'/.htaccess', $htaccess);
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return OC_Helper::computerFileSize($size);
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} else { OC_Log::write('files','Can\'t write upload limit to '.OC::$SERVERROOT.'/.htaccess. Please check the file permissions',OC_Log::WARN); }
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return false;
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}
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/**
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* normalize a path, removing any double, add leading /, etc
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* @param string $path
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* @return string
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*/
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static public function normalizePath($path){
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$path='/'.$path;
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$old='';
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while($old!=$path){//replace any multiplicity of slashes with a single one
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$old=$path;
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$path=str_replace('//','/',$path);
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}
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return $path;
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}
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}
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function fileCmp($a,$b){
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if($a['type']=='dir' and $b['type']!='dir'){
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return -1;
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}elseif($a['type']!='dir' and $b['type']=='dir'){
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return 1;
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}else{
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return strnatcasecmp($a['name'],$b['name']);
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}
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}
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