119 lines
4.1 KiB
PHP
119 lines
4.1 KiB
PHP
<?php
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/**
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* @author Björn Schießle <schiessle@owncloud.com>
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* @author Georg Ehrke <georg@owncloud.com>
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* @author Lukas Reschke <lukas@owncloud.com>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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*
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* @copyright Copyright (c) 2015, ownCloud, Inc.
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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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OCP\JSON::checkAppEnabled('files_sharing');
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\OC_User::setIncognitoMode(true);
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$file = array_key_exists('file', $_GET) ? (string) $_GET['file'] : '';
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$maxX = array_key_exists('x', $_GET) ? (int) $_GET['x'] : '32';
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$maxY = array_key_exists('y', $_GET) ? (int) $_GET['y'] : '32';
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$scalingUp = array_key_exists('scalingup', $_GET) ? (bool) $_GET['scalingup'] : true;
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$token = array_key_exists('t', $_GET) ? (string) $_GET['t'] : '';
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$keepAspect = array_key_exists('a', $_GET) ? true : false;
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if($token === ''){
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\OC_Response::setStatus(\OC_Response::STATUS_BAD_REQUEST);
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\OCP\Util::writeLog('core-preview', 'No token parameter was passed', \OCP\Util::DEBUG);
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exit;
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}
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$linkedItem = \OCP\Share::getShareByToken($token);
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if($linkedItem === false || ($linkedItem['item_type'] !== 'file' && $linkedItem['item_type'] !== 'folder')) {
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\OC_Response::setStatus(\OC_Response::STATUS_NOT_FOUND);
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\OCP\Util::writeLog('core-preview', 'Passed token parameter is not valid', \OCP\Util::DEBUG);
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exit;
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}
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if(!isset($linkedItem['uid_owner']) || !isset($linkedItem['file_source'])) {
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\OC_Response::setStatus(\OC_Response::STATUS_INTERNAL_SERVER_ERROR);
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\OCP\Util::writeLog('core-preview', 'Passed token seems to be valid, but it does not contain all necessary information . ("' . $token . '")', \OCP\Util::WARN);
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exit;
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}
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$rootLinkItem = OCP\Share::resolveReShare($linkedItem);
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$userId = $rootLinkItem['uid_owner'];
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OCP\JSON::checkUserExists($rootLinkItem['uid_owner']);
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\OC_Util::setupFS($userId);
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\OC\Files\Filesystem::initMountPoints($userId);
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$view = new \OC\Files\View('/' . $userId . '/files');
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$pathId = $linkedItem['file_source'];
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$path = $view->getPath($pathId);
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if($path === null) {
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\OC_Response::setStatus(\OC_Response::STATUS_NOT_FOUND);
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\OCP\Util::writeLog('core-preview', 'Could not resolve file for shared item', \OCP\Util::WARN);
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exit;
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}
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$pathInfo = $view->getFileInfo($path);
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$sharedFile = null;
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if($linkedItem['item_type'] === 'folder') {
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$isValid = \OC\Files\Filesystem::isValidPath($file);
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if(!$isValid) {
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\OC_Response::setStatus(\OC_Response::STATUS_BAD_REQUEST);
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\OCP\Util::writeLog('core-preview', 'Passed filename is not valid, might be malicious (file:"' . $file . '";ip:"' . \OC::$server->getRequest()->getRemoteAddress() . '")', \OCP\Util::WARN);
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exit;
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}
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$sharedFile = \OC\Files\Filesystem::normalizePath($file);
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}
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if($linkedItem['item_type'] === 'file') {
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$parent = $pathInfo['parent'];
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$path = $view->getPath($parent);
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$sharedFile = $pathInfo['name'];
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}
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$path = \OC\Files\Filesystem::normalizePath($path, false);
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if(substr($path, 0, 1) === '/') {
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$path = substr($path, 1);
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}
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if($maxX === 0 || $maxY === 0) {
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\OC_Response::setStatus(\OC_Response::STATUS_BAD_REQUEST);
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\OCP\Util::writeLog('core-preview', 'x and/or y set to 0', \OCP\Util::DEBUG);
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exit;
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}
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$root = 'files/' . $path;
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try{
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$preview = new \OC\Preview($userId, $root);
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$preview->setFile($sharedFile);
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$preview->setMaxX($maxX);
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$preview->setMaxY($maxY);
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$preview->setScalingUp($scalingUp);
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$preview->setKeepAspect($keepAspect);
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$preview->showPreview();
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} catch (\Exception $e) {
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\OC_Response::setStatus(\OC_Response::STATUS_INTERNAL_SERVER_ERROR);
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\OCP\Util::writeLog('core', $e->getmessage(), \OCP\Util::DEBUG);
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}
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