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<?php
/**
* Copyright (c) 2013 Thomas Müller <thomas.mueller@tmit.eu>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
/**
* Class OC_Connector_Sabre_AbortedUploadDetectionPlugin
*
* This plugin will verify if the uploaded data has been stored completely.
* This is done by comparing the content length of the request with the file size on storage.
*/
class OC_Connector_Sabre_AbortedUploadDetectionPlugin extends Sabre_DAV_ServerPlugin {
/**
* Reference to main server object
*
* @var Sabre_DAV_Server
*/
private $server;
/**
* @var \OC\Files\View
*/
private $fileView;
/**
* @param \OC\Files\View $view
*/
public function __construct($view) {
$this->fileView = $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
*/
public function initialize(Sabre_DAV_Server $server) {
$this->server = $server;
$server->subscribeEvent('afterCreateFile', array($this, 'verifyContentLength'), 10);
$server->subscribeEvent('afterWriteContent', array($this, 'verifyContentLength'), 10);
}
/**
* @param string $filePath
* @param Sabre_DAV_INode $node
* @throws Sabre_DAV_Exception_BadRequest
*/
public function verifyContentLength($filePath, Sabre_DAV_INode $node = null) {
// we should only react on PUT which is used for upload
// e.g. with LOCK this will not work, but LOCK uses createFile() as well
if ($this->server->httpRequest->getMethod() !== 'PUT') {
return;
}
// ownCloud chunked upload will be handled in its own plugin
$chunkHeader = $this->server->httpRequest->getHeader('OC-Chunked');
if ($chunkHeader) {
return;
}
// compare expected and actual size
$expected = $this->getLength();
if (!$expected) {
return;
}
$actual = $this->fileView->filesize($filePath);
if ($actual != $expected) {
$this->fileView->unlink($filePath);
throw new Sabre_DAV_Exception_BadRequest('expected filesize ' . $expected . ' got ' . $actual);
}
}
/**
* @return string
*/
public function getLength() {
$req = $this->server->httpRequest;
$length = $req->getHeader('X-Expected-Entity-Length');
if (!$length) {
$length = $req->getHeader('Content-Length');
}
return $length;
}
}
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