107 lines
3.1 KiB
PHP
107 lines
3.1 KiB
PHP
<?php
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/**
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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*
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* @copyright Copyright (c) 2017, ownCloud GmbH
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* 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,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* 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,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OCA\DAV\Upload;
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use Sabre\DAV\Exception\BadRequest;
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use Sabre\DAV\Server;
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use Sabre\DAV\ServerPlugin;
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class ChunkingPlugin extends ServerPlugin {
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/** @var Server */
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private $server;
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/** @var FutureFile */
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private $sourceNode;
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/**
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* @inheritdoc
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*/
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function initialize(Server $server) {
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$server->on('beforeMove', [$this, 'beforeMove']);
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$this->server = $server;
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}
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/**
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* @param string $sourcePath source path
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* @param string $destination destination path
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*/
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function beforeMove($sourcePath, $destination) {
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$this->sourceNode = $this->server->tree->getNodeForPath($sourcePath);
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if (!$this->sourceNode instanceof FutureFile) {
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// skip handling as the source is not a chunked FutureFile
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return;
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}
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$this->verifySize();
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return $this->performMove($sourcePath, $destination);
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}
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/**
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* Move handler for future file.
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*
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* This overrides the default move behavior to prevent Sabre
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* to delete the target file before moving. Because deleting would
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* lose the file id and metadata.
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*
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* @param string $path source path
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* @param string $destination destination path
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* @return bool|void false to stop handling, void to skip this handler
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*/
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public function performMove($path, $destination) {
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if (!$this->server->tree->nodeExists($destination)) {
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// skip and let the default handler do its work
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return;
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}
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// do a move manually, skipping Sabre's default "delete" for existing nodes
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$this->server->tree->move($path, $destination);
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// trigger all default events (copied from CorePlugin::move)
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$this->server->emit('afterMove', [$path, $destination]);
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$this->server->emit('afterUnbind', [$path]);
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$this->server->emit('afterBind', [$destination]);
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$response = $this->server->httpResponse;
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$response->setHeader('Content-Length', '0');
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$response->setStatus(204);
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return false;
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}
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/**
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* @throws BadRequest
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*/
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private function verifySize() {
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$expectedSize = $this->server->httpRequest->getHeader('OC-Total-Length');
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if ($expectedSize === null) {
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return;
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}
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$actualSize = $this->sourceNode->getSize();
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// casted to string because cast to float cause equality for non equal numbers
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// and integer has the problem of limited size on 32 bit systems
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if ((string)$expectedSize !== (string)$actualSize) {
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throw new BadRequest("Chunks on server do not sum up to $expectedSize but to $actualSize bytes");
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}
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}
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}
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