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<?php
use Sabre\DAV\URLUtil;
/**
* This plugin check user quota and deny creating files when they exceeds the quota.
*
* @author Sergio Cambra
* @copyright Copyright (C) 2012 entreCables S.L. All rights reserved.
* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
*/
class OC_Connector_Sabre_QuotaPlugin extends \Sabre\DAV\ServerPlugin {
/**
* @var \OC\Files\View
*/
private $view;
/**
* Reference to main server object
*
* @var \Sabre\DAV\Server
*/
private $server;
/**
* @param \OC\Files\View $view
*/
public function __construct($view) {
$this->view = $view;
}
/**
* This initializes the plugin.
*
* This function is called by \Sabre\DAV\Server, after
* addPlugin is called.
*
* This method should set up the requires event subscriptions.
*
* @param \Sabre\DAV\Server $server
* @return void
*/
public function initialize(\Sabre\DAV\Server $server) {
$this->server = $server;
$server->subscribeEvent('beforeWriteContent', array($this, 'checkQuota'), 10);
$server->subscribeEvent('beforeCreateFile', array($this, 'checkQuota'), 10);
}
/**
* This method is called before any HTTP method and validates there is enough free space to store the file
*
* @param string $uri
* @param null $data
* @throws \Sabre\DAV\Exception\InsufficientStorage
* @return bool
*/
public function checkQuota($uri, $data = null) {
$length = $this->getLength();
if ($length) {
if (substr($uri, 0, 1) !== '/') {
$uri = '/' . $uri;
}
list($parentUri, $newName) = URLUtil::splitPath($uri);
$req = $this->server->httpRequest;
if ($req->getHeader('OC-Chunked')) {
$info = OC_FileChunking::decodeName($newName);
$chunkHandler = new OC_FileChunking($info);
// subtract the already uploaded size to see whether
// there is still enough space for the remaining chunks
$length -= $chunkHandler->getCurrentSize();
}
$freeSpace = $this->getFreeSpace($parentUri);
if ($freeSpace !== \OCP\Files\FileInfo::SPACE_UNKNOWN && $length > $freeSpace) {
if (isset($chunkHandler)) {
$chunkHandler->cleanup();
}
throw new \Sabre\DAV\Exception\InsufficientStorage();
}
}
return true;
}
public function getLength() {
$req = $this->server->httpRequest;
$length = $req->getHeader('X-Expected-Entity-Length');
if (!is_numeric($length)) {
$length = $req->getHeader('Content-Length');
$length = is_numeric($length) ? $length : null;
}
$ocLength = $req->getHeader('OC-Total-Length');
if (is_numeric($length) && is_numeric($ocLength)) {
return max($length, $ocLength);
}
return $length;
}
/**
* @param string $parentUri
* @return mixed
*/
public function getFreeSpace($parentUri) {
try {
$freeSpace = $this->view->free_space($parentUri);
return $freeSpace;
} catch (\OCP\Files\StorageNotAvailableException $e) {
throw new \Sabre\DAV\Exception\ServiceUnavailable($e->getMessage());
}
}
}
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