nextcloud/inc/lib_filestorage.php

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2010-05-08 23:32:20 +04:00
<?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 Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* Privde a common interface to all different storage options
*/
class OC_FILESTORAGE{
private $observers=array();
/**
* add an observer to the list
* @param OC_FILEOBERSER observer
*/
public function addObserver($observer){
$this->observers[]=$observer;
}
/**
* notify the observers about an action
* @param int action a combination of OC_FILEACTION_WRITE and OC_FILEACTION_READ
* @param string path relative path of the file
*/
public function notifyObservers($path,$action){
foreach($this->observers as $observer){
if($observer->mask & $action){
$observer->notify($path,$action,$this);
}
}
}
public function __construct($parameters){}
public function mkdir($path){}
public function rmdir($path){}
public function opendir($path){}
public function is_dir($path){}
public function is_file($path){}
public function stat($path){}
public function filetype($path){}
public function filesize($path){}
public function is_readable($path){}
public function is_writeable($path){}
public function file_exists($path){}
public function readfile($path){}
public function filectime($path){}
public function filemtime($path){}
public function fileatime($path){}
public function file_get_contents($path){}
public function file_put_contents($path){}
public function unlink($path){}
public function rename($path1,$path2){}
public function copy($path1,$path2){}
public function fopen($path,$mode){}
public function toTmpFile($path){}//copy the file to a temporary file, used for cross-storage file actions
public function fromTmpFile($tmpPath,$path){}//copy a file from a temporary file, used for cross-storage file actions
public function getMimeType($path){}
public function delTree($path){}
public function find($path){}
}
/**
* for local filestore, we only have to map the paths
*/
class OC_FILESTORAGE_LOCAL extends OC_FILESTORAGE{
private $datadir;
public function __construct($arguments){
$this->datadir=$arguments['datadir'];
if(substr($this->datadir,-1)!=='/'){
$this->datadir.='/';
}
}
public function mkdir($path){
if($return=mkdir($this->datadir.$path)){
$this->notifyObservers($path,OC_FILEACTION_CREATE);
}
return $return;
}
public function rmdir($path){
if($return=rmdir($this->datadir.$path)){
$this->notifyObservers($path,OC_FILEACTION_DELETE);
}
return $return;
}
public function opendir($path){
if($return=opendir($this->datadir.$path)){
$this->notifyObservers($path,OC_FILEACTION_READ);
}
return $return;
}
public function is_dir($path){
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return (is_dir($this->datadir.$path) or substr($path,-1)=='/');
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}
public function is_file($path){
return is_file($this->datadir.$path);
}
public function stat($path){
return stat($this->datadir.$path);
}
public function filetype($path){
return filetype($this->datadir.$path);
}
public function filesize($path){
return filesize($this->datadir.$path);
}
public function is_readable($path){
return is_readable($this->datadir.$path);
}
public function is_writeable($path){
return is_writeable($this->datadir.$path);
}
public function file_exists($path){
return file_exists($this->datadir.$path);
}
public function readfile($path){
if($return=readfile($this->datadir.$path)){
$this->notifyObservers($path,OC_FILEACTION_READ);
}
return $return;
}
public function filectime($path){
return filectime($this->datadir.$path);
}
public function filemtime($path){
return filemtime($this->datadir.$path);
}
public function fileatime($path){
return fileatime($this->datadir.$path);
}
public function file_get_contents($path){
if($return=file_get_contents($this->datadir.$path)){
$this->notifyObservers($path,OC_FILEACTION_READ);
}
return $return;
}
public function file_put_contents($path){
if($return=file_put_contents($this->datadir.$path)){
$this->notifyObservers($path,OC_FILEACTION_WRITE);
}
}
public function unlink($path){
if($return=unlink($this->datadir.$path)){
$this->notifyObservers($path,OC_FILEACTION_DELETE);
}
return $return;
}
public function rename($path1,$path2){
if($return=rename($this->datadir.$path1,$this->datadir.$path2)){
$this->notifyObservers($path1.'->'.$path2,OC_FILEACTION_RENAME);
}
return $return;
}
public function copy($path1,$path2){
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if($this->is_dir($path2)){
if(!$this->file_exists($path2)){
$this->mkdir($path2);
}
$source=substr($path1,strrpos($path1,'/')+1);
$path2.=$source;
// sleep(30);
}else{
error_log('isfile');
}
error_log("copy $path1 to {$this->datadir}$path2");
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if($return=copy($this->datadir.$path1,$this->datadir.$path2)){
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error_log('success');
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$this->notifyObservers($path2,OC_FILEACTION_CREATE);
}
return $return;
}
public function fopen($path,$mode){
if($return=fopen($this->datadir.$path,$mode)){
switch($mode){
case 'r':
$this->notifyObservers($path,OC_FILEACTION_READ);
break;
case 'r+':
case 'w+':
case 'x+':
case 'a+':
$this->notifyObservers($path,OC_FILEACTION_READ | OC_FILEACTION_WRITE);
break;
case 'w':
case 'x':
case 'a':
$this->notifyObservers($path,OC_FILEACTION_WRITE);
break;
}
}
return $return;
}
public function getMimeType($fspath){
if (@is_dir($this->datadir.$fspath)) {
// directories are easy
return "httpd/unix-directory";
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}elseif (function_exists('finfo_open') and function_exists('finfo_file') and $finfo=finfo_open(FILEINFO_MIME)){
$mimeType =strtolower(finfo_file($finfo,$this->datadir.$fspath));
$mimeType=substr($mimeType,0,strpos($mimeType,';'));
finfo_close($finfo);
return $mimeType;
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} else if (function_exists("mime_content_type")) {
// use mime magic extension if available
$mime_type = mime_content_type($this->datadir.$fspath);
} else if (self::canExecute("file")) {
// it looks like we have a 'file' command,
// lets see it it does have mime support
$fp = popen("file -i '$fspath' 2>/dev/null", "r");
$reply = fgets($fp);
pclose($fp);
// popen will not return an error if the binary was not found
// and find may not have mime support using "-i"
// so we test the format of the returned string
// the reply begins with the requested filename
if (!strncmp($reply, "$fspath: ", strlen($fspath)+2)) {
$reply = substr($reply, strlen($fspath)+2);
// followed by the mime type (maybe including options)
if (preg_match('/^[[:alnum:]_-]+/[[:alnum:]_-]+;?.*/', $reply, $matches)) {
$mime_type = $matches[0];
}
}
}
if (empty($mime_type)) {
// Fallback solution: try to guess the type by the file extension
// TODO: add more ...
switch (strtolower(strrchr(basename($fspath), "."))) {
case ".html":
$mime_type = "text/html";
break;
case ".txt":
$mime_type = "text/plain";
break;
case ".css":
$mime_type = "text/css";
break;
case ".gif":
$mime_type = "image/gif";
break;
case ".jpg":
$mime_type = "image/jpeg";
break;
case ".jpeg":
$mime_type = "image/jpeg";
break;
case ".png":
$mime_type = "image/png";
break;
default:
$mime_type = "application/octet-stream";
break;
}
}
return $mime_type;
}
/**
* detect if a given program is found in the search PATH
*
* helper function used by _mimetype() to detect if the
* external 'file' utility is available
*
* @param string program name
* @param string optional search path, defaults to $PATH
* @return bool true if executable program found in path
*/
private function canExecute($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";
}
// now check the directories in the path for the program
foreach (explode(PATH_SEPARATOR, $path) as $dir) {
// skip invalid path entries
if (!file_exists($dir)) continue;
if (!is_dir($dir)) continue;
// and now look for the file
foreach ($exts as $ext) {
if ($check_fn("$dir/$name".$ext)) return true;
}
}
return false;
}
public function toTmpFile($path){
$tmpFolder=sys_get_temp_dir();
$filename=tempnam($tmpFolder,'OC_TEMP_FILE_'.substr($path,strrpos($path,'.')));
if(copy($this->datadir.$path,$filename)){
$this->notifyObservers($path,OC_FILEACTION_READ);
return $filename;
}else{
return false;
}
}
public function fromTmpFile($tmpFile,$path){
if(rename($tmpFile,$this->datadir.$path)){
$this->notifyObservers($path,OC_FILEACTION_CREATE);
return true;
}else{
return false;
}
}
public function delTree($dir) {
$dirRelative=$dir;
$dir=$this->datadir.$dir;
if (!file_exists($dir)) return true;
if (!is_dir($dir) || is_link($dir)) return unlink($dir);
foreach (scandir($dir) as $item) {
if ($item == '.' || $item == '..') continue;
if(is_file($dir.'/'.$item)){
if(unlink($dir.'/'.$item)){
$this->notifyObservers($dir.'/'.$item,OC_FILEACTION_DELETE);
}
}elseif(is_dir($dir.'/'.$item)){
if (!$this->delTree($dirRelative. "/" . $item)){
return false;
};
}
}
if($return=rmdir($dir)){
$this->notifyObservers($dir,OC_FILEACTION_DELETE);
}
return $return;
}
public function find($path){
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$return=System::find($this->datadir.$path);
foreach($return as &$file){
$file=str_replace($file,$this->datadir,'');
}
return $return;
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}
}
?>