139 lines
3.8 KiB
PHP
139 lines
3.8 KiB
PHP
<?php
|
|
/**
|
|
* @author Bart Visscher <bartv@thisnet.nl>
|
|
* @author Felix Moeller <mail@felixmoeller.de>
|
|
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
|
|
* @author Morris Jobke <hey@morrisjobke.de>
|
|
* @author Robin Appelman <icewind@owncloud.com>
|
|
* @author Robin McCorkell <rmccorkell@karoshi.org.uk>
|
|
* @author Scrutinizer Auto-Fixer <auto-fixer@scrutinizer-ci.com>
|
|
* @author Thomas Müller <thomas.mueller@tmit.eu>
|
|
* @author Vincent Petry <pvince81@owncloud.com>
|
|
*
|
|
* @copyright Copyright (c) 2015, ownCloud, Inc.
|
|
* @license AGPL-3.0
|
|
*
|
|
* This code is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Affero General Public License, version 3,
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* This program 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, version 3,
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* Class for manipulating filesystem requests
|
|
*
|
|
* Manipulation happens by using 2 kind of proxy operations, pre and post proxies
|
|
* that manipulate the filesystem call and the result of the call respectively
|
|
*
|
|
* A pre-proxy recieves the filepath as arugments (or 2 filespaths in case of
|
|
* operations like copy or move) and return a boolean
|
|
* If a pre-proxy returns false the file operation will be canceled
|
|
* All filesystem operations have a pre-proxy
|
|
*
|
|
* A post-proxy recieves 2 arguments, the filepath and the result of the operation.
|
|
* The return value of the post-proxy will be used as the new result of the operation
|
|
* The operations that have a post-proxy are:
|
|
* file_get_contents, is_file, is_dir, file_exists, stat, is_readable,
|
|
* is_writable, filemtime, filectime, file_get_contents,
|
|
* getMimeType, hash, fopen, free_space and search
|
|
*/
|
|
|
|
class OC_FileProxy{
|
|
private static $proxies=array();
|
|
public static $enabled=true;
|
|
|
|
/**
|
|
* fallback function when a proxy operation is not implemented
|
|
* @param string $function the name of the proxy operation
|
|
* @param mixed $arguments
|
|
*
|
|
* this implements a dummy proxy for all operations
|
|
*/
|
|
public function __call($function, $arguments) {
|
|
if(substr($function, 0, 3)=='pre') {
|
|
return true;
|
|
}else{
|
|
return $arguments[1];
|
|
}
|
|
}
|
|
|
|
/**
|
|
* register a proxy to be used
|
|
* @param OC_FileProxy $proxy
|
|
*/
|
|
public static function register($proxy) {
|
|
self::$proxies[]=$proxy;
|
|
}
|
|
|
|
/**
|
|
* @param string $operation
|
|
*/
|
|
public static function getProxies($operation = null) {
|
|
if ($operation === null) {
|
|
// return all
|
|
return self::$proxies;
|
|
}
|
|
$proxies=array();
|
|
foreach(self::$proxies as $proxy) {
|
|
if(method_exists($proxy, $operation)) {
|
|
$proxies[]=$proxy;
|
|
}
|
|
}
|
|
return $proxies;
|
|
}
|
|
|
|
/**
|
|
* @param string $operation
|
|
* @param string|boolean $filepath
|
|
*/
|
|
public static function runPreProxies($operation,&$filepath,&$filepath2=null) {
|
|
if(!self::$enabled) {
|
|
return true;
|
|
}
|
|
$operation='pre'.$operation;
|
|
$proxies=self::getProxies($operation);
|
|
foreach($proxies as $proxy) {
|
|
if(!is_null($filepath2)) {
|
|
if($proxy->$operation($filepath, $filepath2)===false) {
|
|
return false;
|
|
}
|
|
}else{
|
|
if($proxy->$operation($filepath)===false) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @param string $operation
|
|
* @param string|boolean $path
|
|
*
|
|
* @return string
|
|
*/
|
|
public static function runPostProxies($operation, $path, $result) {
|
|
if(!self::$enabled) {
|
|
return $result;
|
|
}
|
|
$operation='post'.$operation;
|
|
$proxies=self::getProxies($operation);
|
|
foreach($proxies as $proxy) {
|
|
$result=$proxy->$operation($path, $result);
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
public static function clearProxies() {
|
|
self::$proxies=array();
|
|
}
|
|
}
|