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<?php
/**
* @author Lukas Reschke <lukas@owncloud.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <icewind@owncloud.com>
* @author Robin McCorkell <rmccorkell@karoshi.org.uk>
* @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/>
*
*/
namespace OC\Connector\Sabre;
use Sabre\DAV\IFile;
use \Sabre\DAV\PropFind;
use \Sabre\DAV\PropPatch;
use \Sabre\HTTP\RequestInterface;
use \Sabre\HTTP\ResponseInterface;
class FilesPlugin extends \Sabre\DAV\ServerPlugin {
// namespace
const NS_OWNCLOUD = 'http://owncloud.org/ns';
const FILEID_PROPERTYNAME = '{http://owncloud.org/ns}id';
const PERMISSIONS_PROPERTYNAME = '{http://owncloud.org/ns}permissions';
const DOWNLOADURL_PROPERTYNAME = '{http://owncloud.org/ns}downloadURL';
const SIZE_PROPERTYNAME = '{http://owncloud.org/ns}size';
const GETETAG_PROPERTYNAME = '{DAV:}getetag';
const GETLASTMODIFIED_PROPERTYNAME = '{DAV:}getlastmodified';
/**
* Reference to main server object
*
* @var \Sabre\DAV\Server
*/
private $server;
/**
* @var \Sabre\DAV\Tree
*/
private $tree;
/**
* @param \Sabre\DAV\Tree $tree
*/
public function __construct(\Sabre\DAV\Tree $tree) {
$this->tree = $tree;
}
/**
* This initializes the plugin.
*
* This function is called by \Sabre\DAV\Server, after
* addPlugin is called.
*
* This method should set up the required event subscriptions.
*
* @param \Sabre\DAV\Server $server
* @return void
*/
public function initialize(\Sabre\DAV\Server $server) {
$server->xmlNamespaces[self::NS_OWNCLOUD] = 'oc';
$server->protectedProperties[] = self::FILEID_PROPERTYNAME;
$server->protectedProperties[] = self::PERMISSIONS_PROPERTYNAME;
$server->protectedProperties[] = self::SIZE_PROPERTYNAME;
$server->protectedProperties[] = self::DOWNLOADURL_PROPERTYNAME;
// normally these cannot be changed (RFC4918), but we want them modifiable through PROPPATCH
$allowedProperties = ['{DAV:}getetag', '{DAV:}getlastmodified'];
$server->protectedProperties = array_diff($server->protectedProperties, $allowedProperties);
$this->server = $server;
$this->server->on('propFind', array($this, 'handleGetProperties'));
$this->server->on('propPatch', array($this, 'handleUpdateProperties'));
$this->server->on('afterBind', array($this, 'sendFileIdHeader'));
$this->server->on('afterWriteContent', array($this, 'sendFileIdHeader'));
$this->server->on('afterMethod:GET', [$this,'httpGet']);
$this->server->on('afterResponse', function($request, ResponseInterface $response) {
$body = $response->getBody();
if (is_resource($body)) {
fclose($body);
}
});
}
/**
* Plugin that adds a 'Content-Disposition: attachment' header to all files
* delivered by SabreDAV.
* @param RequestInterface $request
* @param ResponseInterface $response
*/
function httpGet(RequestInterface $request, ResponseInterface $response) {
// Only handle valid files
$node = $this->tree->getNodeForPath($request->getPath());
if (!($node instanceof IFile)) return;
$response->addHeader('Content-Disposition', 'attachment');
}
/**
* Adds all ownCloud-specific properties
*
* @param PropFind $propFind
* @param \Sabre\DAV\INode $node
* @return void
*/
public function handleGetProperties(PropFind $propFind, \Sabre\DAV\INode $node) {
if ($node instanceof \OC\Connector\Sabre\Node) {
$propFind->handle(self::FILEID_PROPERTYNAME, function() use ($node) {
return $node->getFileId();
});
$propFind->handle(self::PERMISSIONS_PROPERTYNAME, function() use ($node) {
return $node->getDavPermissions();
});
$propFind->handle(self::GETETAG_PROPERTYNAME, function() use ($node) {
return $node->getEtag();
});
}
if ($node instanceof \OC\Connector\Sabre\File) {
$propFind->handle(self::DOWNLOADURL_PROPERTYNAME, function() use ($node) {
/** @var $node \OC\Connector\Sabre\File */
$directDownloadUrl = $node->getDirectDownload();
if (isset($directDownloadUrl['url'])) {
return $directDownloadUrl['url'];
}
return false;
});
}
if ($node instanceof \OC\Connector\Sabre\Directory) {
$propFind->handle(self::SIZE_PROPERTYNAME, function() use ($node) {
return $node->getSize();
});
}
}
/**
* Update ownCloud-specific properties
*
* @param string $path
* @param PropPatch $propPatch
*
* @return void
*/
public function handleUpdateProperties($path, PropPatch $propPatch) {
$propPatch->handle(self::GETLASTMODIFIED_PROPERTYNAME, function($time) use ($path) {
if (empty($time)) {
return false;
}
$node = $this->tree->getNodeForPath($path);
if (is_null($node)) {
return 404;
}
$node->touch($time);
return true;
});
$propPatch->handle(self::GETETAG_PROPERTYNAME, function($etag) use ($path) {
if (empty($etag)) {
return false;
}
$node = $this->tree->getNodeForPath($path);
if (is_null($node)) {
return 404;
}
if ($node->setEtag($etag) !== -1) {
return true;
}
return false;
});
}
/**
* @param string $filePath
* @param \Sabre\DAV\INode $node
* @throws \Sabre\DAV\Exception\BadRequest
*/
public function sendFileIdHeader($filePath, \Sabre\DAV\INode $node = null) {
// chunked upload handling
if (isset($_SERVER['HTTP_OC_CHUNKED'])) {
list($path, $name) = \Sabre\HTTP\URLUtil::splitPath($filePath);
$info = \OC_FileChunking::decodeName($name);
if (!empty($info)) {
$filePath = $path . '/' . $info['name'];
}
}
// we get the node for the given $filePath here because in case of afterCreateFile $node is the parent folder
if (!$this->server->tree->nodeExists($filePath)) {
return;
}
$node = $this->server->tree->getNodeForPath($filePath);
if ($node instanceof \OC\Connector\Sabre\Node) {
$fileId = $node->getFileId();
if (!is_null($fileId)) {
$this->server->httpResponse->setHeader('OC-FileId', $fileId);
}
}
}
}
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