nextcloud/lib/private/connector/sabre/server.php

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<?php
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/**
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* @author Andreas Fischer <bantu@owncloud.com>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author scolebrook <scolebrook@mac.com>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <pvince81@owncloud.com>
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*
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* @copyright Copyright (c) 2015, ownCloud, Inc.
* @license AGPL-3.0
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*
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* 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.
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*
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* 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.
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*
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* 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/>
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*
*/
class OC_Connector_Sabre_Server extends Sabre\DAV\Server {
/**
* @var string
*/
private $overLoadedUri = null;
/**
* @var boolean
*/
private $ignoreRangeHeader = false;
/**
* @see \Sabre\DAV\Server
*/
public function __construct($treeOrNode = null) {
parent::__construct($treeOrNode);
self::$exposeVersion = false;
}
public function getRequestUri() {
if (!is_null($this->overLoadedUri)) {
return $this->overLoadedUri;
}
return parent::getRequestUri();
}
public function checkPreconditions($handleAsGET = false) {
// chunked upload handling
if (isset($_SERVER['HTTP_OC_CHUNKED'])) {
$filePath = parent::getRequestUri();
list($path, $name) = \Sabre\DAV\URLUtil::splitPath($filePath);
$info = OC_FileChunking::decodeName($name);
if (!empty($info)) {
$filePath = $path . '/' . $info['name'];
$this->overLoadedUri = $filePath;
}
}
$result = parent::checkPreconditions($handleAsGET);
$this->overLoadedUri = null;
return $result;
}
public function getHTTPRange() {
if ($this->ignoreRangeHeader) {
return null;
}
return parent::getHTTPRange();
}
protected function httpGet($uri) {
$range = $this->getHTTPRange();
if (OC_App::isEnabled('files_encryption') && $range) {
// encryption does not support range requests
$this->ignoreRangeHeader = true;
}
return parent::httpGet($uri);
}
/**
* @see \Sabre\DAV\Server
*/
protected function httpPropfind($uri) {
// $xml = new \Sabre\DAV\XMLReader(file_get_contents('php://input'));
$requestedProperties = $this->parsePropFindRequest($this->httpRequest->getBody(true));
$depth = $this->getHTTPDepth(1);
// The only two options for the depth of a propfind is 0 or 1
// if ($depth!=0) $depth = 1;
$newProperties = $this->getPropertiesForPath($uri,$requestedProperties,$depth);
// This is a multi-status response
$this->httpResponse->sendStatus(207);
$this->httpResponse->setHeader('Content-Type','application/xml; charset=utf-8');
$this->httpResponse->setHeader('Vary','Brief,Prefer');
// Normally this header is only needed for OPTIONS responses, however..
// iCal seems to also depend on these being set for PROPFIND. Since
// this is not harmful, we'll add it.
$features = array('1','3', 'extended-mkcol');
foreach($this->plugins as $plugin) {
$features = array_merge($features,$plugin->getFeatures());
}
$this->httpResponse->setHeader('DAV',implode(', ',$features));
$prefer = $this->getHTTPPrefer();
$minimal = $prefer['return-minimal'];
$data = $this->generateMultiStatus($newProperties, $minimal);
$this->httpResponse->sendBody($data);
}
/**
* Small helper to support PROPFIND with DEPTH_INFINITY.
* @param string $path
*/
private function addPathNodesRecursively(&$nodes, $path) {
foreach($this->tree->getChildren($path) as $childNode) {
$nodes[$path . '/' . $childNode->getName()] = $childNode;
if ($childNode instanceof \Sabre\DAV\ICollection)
$this->addPathNodesRecursively($nodes, $path . '/' . $childNode->getName());
}
}
public function getPropertiesForPath($path, $propertyNames = array(), $depth = 0) {
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// if ($depth!=0) $depth = 1;
$path = rtrim($path,'/');
// This event allows people to intercept these requests early on in the
// process.
//
// We're not doing anything with the result, but this can be helpful to
// pre-fetch certain expensive live properties.
$this->broadCastEvent('beforeGetPropertiesForPath', array($path, $propertyNames, $depth));
$returnPropertyList = array();
$parentNode = $this->tree->getNodeForPath($path);
$nodes = array(
$path => $parentNode
);
if ($depth==1 && $parentNode instanceof \Sabre\DAV\ICollection) {
foreach($this->tree->getChildren($path) as $childNode)
$nodes[$path . '/' . $childNode->getName()] = $childNode;
} else if ($depth == self::DEPTH_INFINITY && $parentNode instanceof \Sabre\DAV\ICollection) {
$this->addPathNodesRecursively($nodes, $path);
}
// If the propertyNames array is empty, it means all properties are requested.
// We shouldn't actually return everything we know though, and only return a
// sensible list.
$allProperties = count($propertyNames)==0;
foreach($nodes as $myPath=>$node) {
$currentPropertyNames = $propertyNames;
$newProperties = array(
'200' => array(),
'404' => array(),
);
if ($allProperties) {
// Default list of propertyNames, when all properties were requested.
$currentPropertyNames = array(
'{DAV:}getlastmodified',
'{DAV:}getcontentlength',
'{DAV:}resourcetype',
'{DAV:}quota-used-bytes',
'{DAV:}quota-available-bytes',
'{DAV:}getetag',
'{DAV:}getcontenttype',
);
}
// If the resourceType was not part of the list, we manually add it
// and mark it for removal. We need to know the resourcetype in order
// to make certain decisions about the entry.
// WebDAV dictates we should add a / and the end of href's for collections
$removeRT = false;
if (!in_array('{DAV:}resourcetype',$currentPropertyNames)) {
$currentPropertyNames[] = '{DAV:}resourcetype';
$removeRT = true;
}
$result = $this->broadcastEvent('beforeGetProperties',array($myPath, $node, &$currentPropertyNames, &$newProperties));
// If this method explicitly returned false, we must ignore this
// node as it is inaccessible.
if ($result===false) continue;
if (count($currentPropertyNames) > 0) {
if ($node instanceof \Sabre\DAV\IProperties) {
$nodeProperties = $node->getProperties($currentPropertyNames);
// The getProperties method may give us too much,
// properties, in case the implementor was lazy.
//
// So as we loop through this list, we will only take the
// properties that were actually requested and discard the
// rest.
foreach($currentPropertyNames as $k=>$currentPropertyName) {
if (isset($nodeProperties[$currentPropertyName])) {
unset($currentPropertyNames[$k]);
$newProperties[200][$currentPropertyName] = $nodeProperties[$currentPropertyName];
}
}
}
}
foreach($currentPropertyNames as $prop) {
if (isset($newProperties[200][$prop])) continue;
switch($prop) {
case '{DAV:}getlastmodified' : if ($node->getLastModified()) $newProperties[200][$prop] = new \Sabre\DAV\Property\GetLastModified($node->getLastModified()); break;
case '{DAV:}getcontentlength' :
if ($node instanceof \Sabre\DAV\IFile) {
$size = $node->getSize();
if (!is_null($size)) {
$newProperties[200][$prop] = 0 + $size;
}
}
break;
case '{DAV:}quota-used-bytes' :
if ($node instanceof \Sabre\DAV\IQuota) {
$quotaInfo = $node->getQuotaInfo();
$newProperties[200][$prop] = $quotaInfo[0];
}
break;
case '{DAV:}quota-available-bytes' :
if ($node instanceof \Sabre\DAV\IQuota) {
$quotaInfo = $node->getQuotaInfo();
$newProperties[200][$prop] = $quotaInfo[1];
}
break;
case '{DAV:}getetag' : if ($node instanceof \Sabre\DAV\IFile && $etag = $node->getETag()) $newProperties[200][$prop] = $etag; break;
case '{DAV:}getcontenttype' : if ($node instanceof \Sabre\DAV\IFile && $ct = $node->getContentType()) $newProperties[200][$prop] = $ct; break;
case '{DAV:}supported-report-set' :
$reports = array();
foreach($this->plugins as $plugin) {
$reports = array_merge($reports, $plugin->getSupportedReportSet($myPath));
}
$newProperties[200][$prop] = new \Sabre\DAV\Property\SupportedReportSet($reports);
break;
case '{DAV:}resourcetype' :
$newProperties[200]['{DAV:}resourcetype'] = new \Sabre\DAV\Property\ResourceType();
foreach($this->resourceTypeMapping as $className => $resourceType) {
if ($node instanceof $className) $newProperties[200]['{DAV:}resourcetype']->add($resourceType);
}
break;
}
// If we were unable to find the property, we will list it as 404.
if (!$allProperties && !isset($newProperties[200][$prop])) $newProperties[404][$prop] = null;
}
$this->broadcastEvent('afterGetProperties',array(trim($myPath,'/'),&$newProperties, $node));
$newProperties['href'] = trim($myPath,'/');
// Its is a WebDAV recommendation to add a trailing slash to collectionnames.
// Apple's iCal also requires a trailing slash for principals (rfc 3744), though this is non-standard.
if ($myPath!='' && isset($newProperties[200]['{DAV:}resourcetype'])) {
$rt = $newProperties[200]['{DAV:}resourcetype'];
if ($rt->is('{DAV:}collection') || $rt->is('{DAV:}principal')) {
$newProperties['href'] .='/';
}
}
// If the resourcetype property was manually added to the requested property list,
// we will remove it again.
if ($removeRT) unset($newProperties[200]['{DAV:}resourcetype']);
$returnPropertyList[] = $newProperties;
}
return $returnPropertyList;
}
}