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files.php 10.85 KiB
<?php
/**
* ownCloud
*
* @author Frank Karlitschek
* @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/>.
*
*/
/**
* Class for fileserver access
*
*/
class OC_Files {
static $tmpFiles=array();
/**
* get the content of a directory
* @param dir $directory
*/
public static function getDirectoryContent($directory, $mimetype_filter = ''){
if(strpos($directory,OC::$CONFIG_DATADIRECTORY)===0){
$directory=substr($directory,strlen(OC::$CONFIG_DATADIRECTORY));
}
$files=OC_FileCache::getFolderContent($directory, '', $mimetype_filter);
foreach($files as &$file){
$file['directory']=$directory;
$file['type']=($file['mimetype']=='httpd/unix-directory')?'dir':'file';
}
usort($files, "fileCmp");//TODO: remove this once ajax is merged
return $files;
}
/**
* return the content of a file or return a zip file containning multiply files
*
* @param dir $dir
* @param file $file ; seperated list of files to download
* @param boolean $only_header ; boolean to only send header of the request
*/
public static function get($dir,$files, $only_header = false){
if(strpos($files,';')){
$files=explode(';',$files);
}
if(is_array($files)){
self::validateZipDownload($dir,$files);
$executionTime = intval(ini_get('max_execution_time'));
set_time_limit(0);
$zip = new ZipArchive();
$filename = OC_Helper::tmpFile('.zip');
if ($zip->open($filename, ZIPARCHIVE::CREATE | ZIPARCHIVE::OVERWRITE)!==TRUE) {
exit("cannot open <$filename>\n");
} foreach($files as $file){
$file=$dir.'/'.$file;
if(OC_Filesystem::is_file($file)){
$tmpFile=OC_Filesystem::toTmpFile($file);
self::$tmpFiles[]=$tmpFile;
$zip->addFile($tmpFile,basename($file));
}elseif(OC_Filesystem::is_dir($file)){
self::zipAddDir($file,$zip);
}
}
$zip->close();
set_time_limit($executionTime);
}elseif(OC_Filesystem::is_dir($dir.'/'.$files)){
self::validateZipDownload($dir,$files);
$executionTime = intval(ini_get('max_execution_time'));
set_time_limit(0);
$zip = new ZipArchive();
$filename = OC_Helper::tmpFile('.zip');
if ($zip->open($filename, ZIPARCHIVE::CREATE | ZIPARCHIVE::OVERWRITE)!==TRUE) {
exit("cannot open <$filename>\n");
}
$file=$dir.'/'.$files;
self::zipAddDir($file,$zip);
$zip->close();
set_time_limit($executionTime);
}else{
$zip=false;
$filename=$dir.'/'.$files;
}
@ob_end_clean();
if($zip or OC_Filesystem::is_readable($filename)){
header('Content-Disposition: attachment; filename="'.basename($filename).'"');
header('Content-Transfer-Encoding: binary');
OC_Response::disableCaching();
if($zip){
ini_set('zlib.output_compression', 'off');
header('Content-Type: application/zip');
header('Content-Length: ' . filesize($filename));
}else{
$fileData=OC_FileCache::get($filename);
header('Content-Type: ' . $fileData['mimetype']);
}
}elseif($zip or !OC_Filesystem::file_exists($filename)){
header("HTTP/1.0 404 Not Found");
$tmpl = new OC_Template( '', '404', 'guest' );
$tmpl->assign('file',$filename);
$tmpl->printPage();
}else{
header("HTTP/1.0 403 Forbidden");
die('403 Forbidden');
}
if($only_header){
if(!$zip)
header("Content-Length: ".OC_Filesystem::filesize($filename));
return ;
}
if($zip){
$handle=fopen($filename,'r');
if ($handle) {
$chunkSize = 8*1024;// 1 MB chunks
while (!feof($handle)) {
echo fread($handle, $chunkSize);
flush();
}
}
unlink($filename);
}else{
OC_Filesystem::readfile($filename);
}
foreach(self::$tmpFiles as $tmpFile){ if(file_exists($tmpFile) and is_file($tmpFile)){
unlink($tmpFile);
}
}
}
public static function zipAddDir($dir,$zip,$internalDir=''){
$dirname=basename($dir);
$zip->addEmptyDir($internalDir.$dirname);
$internalDir.=$dirname.='/';
$files=OC_Files::getdirectorycontent($dir);
foreach($files as $file){
$filename=$file['name'];
$file=$dir.'/'.$filename;
if(OC_Filesystem::is_file($file)){
$tmpFile=OC_Filesystem::toTmpFile($file);
OC_Files::$tmpFiles[]=$tmpFile;
$zip->addFile($tmpFile,$internalDir.$filename);
}elseif(OC_Filesystem::is_dir($file)){
self::zipAddDir($file,$zip,$internalDir);
}
}
}
/**
* move a file or folder
*
* @param dir $sourceDir
* @param file $source
* @param dir $targetDir
* @param file $target
*/
public static function move($sourceDir,$source,$targetDir,$target){
if(OC_User::isLoggedIn()){
$targetFile=self::normalizePath($targetDir.'/'.$target);
$sourceFile=self::normalizePath($sourceDir.'/'.$source);
return OC_Filesystem::rename($sourceFile,$targetFile);
}
}
/**
* copy a file or folder
*
* @param dir $sourceDir
* @param file $source
* @param dir $targetDir
* @param file $target
*/
public static function copy($sourceDir,$source,$targetDir,$target){
if(OC_User::isLoggedIn()){
$targetFile=$targetDir.'/'.$target;
$sourceFile=$sourceDir.'/'.$source;
return OC_Filesystem::copy($sourceFile,$targetFile);
}
}
/**
* create a new file or folder
*
* @param dir $dir
* @param file $name
* @param type $type
*/
public static function newFile($dir,$name,$type){
if(OC_User::isLoggedIn()){
$file=$dir.'/'.$name;
if($type=='dir'){
return OC_Filesystem::mkdir($file);
}elseif($type=='file'){
$fileHandle=OC_Filesystem::fopen($file, 'w');
if($fileHandle){ fclose($fileHandle);
return true;
}else{
return false;
}
}
}
}
/**
* deletes a file or folder
*
* @param dir $dir
* @param file $name
*/
public static function delete($dir,$file){
if(OC_User::isLoggedIn()){
$file=$dir.'/'.$file;
return OC_Filesystem::unlink($file);
}
}
/**
* checks if the selected files are within the size constraint. If not, outputs an error page.
*
* @param dir $dir
* @param files $files
*/
static function validateZipDownload($dir, $files) {
if(!OC_Config::getValue('allowZipDownload', true)) {
$l = OC_L10N::get('files');
header("HTTP/1.0 409 Conflict");
$tmpl = new OC_Template( '', 'error', 'user' );
$errors = array(
array(
'error' => $l->t('ZIP download is turned off.'),
'hint' => $l->t('Files need to be downloaded one by one.') . '<br/><a href="javascript:history.back()">' . $l->t('Back to Files') . '</a>',
)
);
$tmpl->assign('errors', $errors);
$tmpl->printPage();
exit;
}
$zipLimit = OC_Config::getValue('maxZipInputSize', OC_Helper::computerFileSize('800 MB'));
if($zipLimit > 0) {
$totalsize = 0;
if(is_array($files)){
foreach($files as $file){
$totalsize += OC_Filesystem::filesize($dir.'/'.$file);
}
}else{
$totalsize += OC_Filesystem::filesize($dir.'/'.$files);
}
if($totalsize > $zipLimit) {
$l = OC_L10N::get('files');
header("HTTP/1.0 409 Conflict");
$tmpl = new OC_Template( '', 'error', 'user' );
$errors = array(
array(
'error' => $l->t('Selected files too large to generate zip file.'),
'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>',
)
);
$tmpl->assign('errors', $errors);
$tmpl->printPage();
exit;
}
}
}
/**
* try to detect the mime type of a file
*
* @param string path
* @return string guessed mime type
*/
static function getMimeType($path){
return OC_Filesystem::getMimeType($path);
}
/**
* get a file tree
*
* @param string path
* @return array
*/
static function getTree($path){
return OC_Filesystem::getTree($path);
}
/**
* pull a file from a remote server
* @param string source
* @param string token
* @param string dir
* @param string file
* @return string guessed mime type
*/
static function pull($source,$token,$dir,$file){
$tmpfile=tempnam(get_temp_dir(),'remoteCloudFile');
$fp=fopen($tmpfile,'w+');
$url=$source.="/files/pull.php?token=$token";
$ch=curl_init();
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_FILE, $fp);
curl_exec($ch);
fclose($fp);
$info=curl_getinfo($ch);
$httpCode=$info['http_code'];
curl_close($ch);
if($httpCode==200 or $httpCode==0){
OC_Filesystem::fromTmpFile($tmpfile,$dir.'/'.$file);
return true;
}else{
return false;
}
}
/**
* set the maximum upload size limit for apache hosts using .htaccess
* @param int size filesisze in bytes
* @return false on failure, size on success
*/
static function setUploadLimit($size){
//don't allow user to break his config -- upper boundary
if($size > PHP_INT_MAX) {
//max size is always 1 byte lower than computerFileSize returns
if($size > PHP_INT_MAX+1)
return false;
$size -=1;
} else {
$size=OC_Helper::humanFileSize($size);
$size=substr($size,0,-1);//strip the B
$size=str_replace(' ','',$size); //remove the space between the size and the postfix
}
//don't allow user to break his config -- broken or malicious size input
if(intval($size) == 0) {
return false; }
$htaccess = @file_get_contents(OC::$SERVERROOT.'/.htaccess'); //supress errors in case we don't have permissions for
if(!$htaccess) {
return false;
}
$phpValueKeys = array(
'upload_max_filesize',
'post_max_size'
);
foreach($phpValueKeys as $key) {
$pattern = '/php_value '.$key.' (\S)*/';
$setting = 'php_value '.$key.' '.$size;
$hasReplaced = 0;
$content = preg_replace($pattern, $setting, $htaccess, 1, $hasReplaced);
if($content !== NULL) {
$htaccess = $content;
}
if($hasReplaced == 0) {
$htaccess .= "\n" . $setting;
}
}
//supress errors in case we don't have permissions for it
if(@file_put_contents(OC::$SERVERROOT.'/.htaccess', $htaccess)) {
return OC_Helper::computerFileSize($size);
}
return false;
}
/**
* normalize a path, removing any double, add leading /, etc
* @param string $path
* @return string
*/
static public function normalizePath($path){
$path='/'.$path;
$old='';
while($old!=$path){//replace any multiplicity of slashes with a single one
$old=$path;
$path=str_replace('//','/',$path);
}
return $path;
}
}
function fileCmp($a,$b){
if($a['type']=='dir' and $b['type']!='dir'){
return -1;
}elseif($a['type']!='dir' and $b['type']=='dir'){
return 1;
}else{
return strnatcasecmp($a['name'],$b['name']);
}
}