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nextcloud/apps/files_sharing/lib/Controller/ShareController.php

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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Bjoern Schiessle <bjoern@schiessle.org>
* @author Björn Schießle <bjoern@schiessle.org>
* @author Georg Ehrke <georg@owncloud.com>
* @author Joas Schilling <coding@schilljs.com>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Piotr Filiciak <piotr@filiciak.pl>
* @author Robin Appelman <robin@icewind.nl>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Vincent Petry <pvince81@owncloud.com>
*
* @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 OCA\Files_Sharing\Controller;
use OC_Files;
use OC_Util;
use OCA\FederatedFileSharing\FederatedShareProvider;
use OCP\Defaults;
use OCP\IL10N;
use OCP\Template;
use OCP\Share;
use OCP\AppFramework\Controller;
use OCP\IRequest;
use OCP\AppFramework\Http\TemplateResponse;
use OCP\AppFramework\Http\RedirectResponse;
use OCP\AppFramework\Http\NotFoundResponse;
use OCP\IURLGenerator;
use OCP\IConfig;
use OCP\ILogger;
use OCP\IUserManager;
use OCP\ISession;
use OCP\IPreview;
use OCP\Util;
use OCA\Files_Sharing\Activity;
use \OCP\Files\NotFoundException;
use OCP\Files\IRootFolder;
use OCP\Share\Exceptions\ShareNotFound;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
/**
* Class ShareController
*
* @package OCA\Files_Sharing\Controllers
*/
class ShareController extends Controller {
/** @var IConfig */
protected $config;
/** @var IURLGenerator */
protected $urlGenerator;
/** @var IUserManager */
protected $userManager;
/** @var ILogger */
protected $logger;
/** @var \OCP\Activity\IManager */
protected $activityManager;
/** @var \OCP\Share\IManager */
protected $shareManager;
/** @var ISession */
protected $session;
/** @var IPreview */
protected $previewManager;
/** @var IRootFolder */
protected $rootFolder;
/** @var FederatedShareProvider */
protected $federatedShareProvider;
/** @var EventDispatcherInterface */
protected $eventDispatcher;
/** @var IL10N */
protected $l10n;
/** @var Defaults */
protected $defaults;
/**
* @param string $appName
* @param IRequest $request
* @param IConfig $config
* @param IURLGenerator $urlGenerator
* @param IUserManager $userManager
* @param ILogger $logger
* @param \OCP\Activity\IManager $activityManager
* @param \OCP\Share\IManager $shareManager
* @param ISession $session
* @param IPreview $previewManager
* @param IRootFolder $rootFolder
* @param FederatedShareProvider $federatedShareProvider
* @param EventDispatcherInterface $eventDispatcher
* @param IL10N $l10n
* @param \OC_Defaults $defaults
*/
public function __construct($appName,
IRequest $request,
IConfig $config,
IURLGenerator $urlGenerator,
IUserManager $userManager,
ILogger $logger,
\OCP\Activity\IManager $activityManager,
\OCP\Share\IManager $shareManager,
ISession $session,
IPreview $previewManager,
IRootFolder $rootFolder,
FederatedShareProvider $federatedShareProvider,
EventDispatcherInterface $eventDispatcher,
IL10N $l10n,
\OC_Defaults $defaults) {
parent::__construct($appName, $request);
$this->config = $config;
$this->urlGenerator = $urlGenerator;
$this->userManager = $userManager;
$this->logger = $logger;
$this->activityManager = $activityManager;
$this->shareManager = $shareManager;
$this->session = $session;
$this->previewManager = $previewManager;
$this->rootFolder = $rootFolder;
$this->federatedShareProvider = $federatedShareProvider;
$this->eventDispatcher = $eventDispatcher;
$this->l10n = $l10n;
$this->defaults = $defaults;
}
/**
* @PublicPage
* @NoCSRFRequired
*
* @param string $token
* @return TemplateResponse|RedirectResponse
*/
public function showAuthenticate($token) {
$share = $this->shareManager->getShareByToken($token);
if($this->linkShareAuth($share)) {
return new RedirectResponse($this->urlGenerator->linkToRoute('files_sharing.sharecontroller.showShare', array('token' => $token)));
}
return new TemplateResponse($this->appName, 'authenticate', array(), 'guest');
}
/**
* @PublicPage
* @UseSession
*
* Authenticates against password-protected shares
* @param string $token
* @param string $password
* @return RedirectResponse|TemplateResponse|NotFoundResponse
*/
public function authenticate($token, $password = '') {
// Check whether share exists
try {
$share = $this->shareManager->getShareByToken($token);
} catch (ShareNotFound $e) {
return new NotFoundResponse();
}
$authenticate = $this->linkShareAuth($share, $password);
if($authenticate === true) {
return new RedirectResponse($this->urlGenerator->linkToRoute('files_sharing.sharecontroller.showShare', array('token' => $token)));
}
return new TemplateResponse($this->appName, 'authenticate', array('wrongpw' => true), 'guest');
}
/**
* Authenticate a link item with the given password.
* Or use the session if no password is provided.
*
* This is a modified version of Helper::authenticate
* TODO: Try to merge back eventually with Helper::authenticate
*
* @param \OCP\Share\IShare $share
* @param string|null $password
* @return bool
*/
private function linkShareAuth(\OCP\Share\IShare $share, $password = null) {
if ($password !== null) {
if ($this->shareManager->checkPassword($share, $password)) {
$this->session->set('public_link_authenticated', (string)$share->getId());
} else {
$this->emitAccessShareHook($share, 403, 'Wrong password');
return false;
}
} else {
// not authenticated ?
if ( ! $this->session->exists('public_link_authenticated')
|| $this->session->get('public_link_authenticated') !== (string)$share->getId()) {
return false;
}
}
return true;
}
/**
* throws hooks when a share is attempted to be accessed
*
* @param \OCP\Share\IShare|string $share the Share instance if available,
* otherwise token
* @param int $errorCode
* @param string $errorMessage
* @throws \OC\HintException
* @throws \OC\ServerNotAvailableException
*/
protected function emitAccessShareHook($share, $errorCode = 200, $errorMessage = '') {
$itemType = $itemSource = $uidOwner = '';
$token = $share;
$exception = null;
if($share instanceof \OCP\Share\IShare) {
try {
$token = $share->getToken();
$uidOwner = $share->getSharedBy();
$itemType = $share->getNodeType();
$itemSource = $share->getNodeId();
} catch (\Exception $e) {
// we log what we know and pass on the exception afterwards
$exception = $e;
}
}
\OC_Hook::emit('OCP\Share', 'share_link_access', [
'itemType' => $itemType,
'itemSource' => $itemSource,
'uidOwner' => $uidOwner,
'token' => $token,
'errorCode' => $errorCode,
'errorMessage' => $errorMessage,
]);
if(!is_null($exception)) {
throw $exception;
}
}
/**
* Validate the permissions of the share
*
* @param Share\IShare $share
* @return bool
*/
private function validateShare(\OCP\Share\IShare $share) {
return $share->getNode()->isReadable() && $share->getNode()->isShareable();
}
/**
* @PublicPage
* @NoCSRFRequired
*
* @param string $token
* @param string $path
* @return TemplateResponse|RedirectResponse|NotFoundResponse
* @throws NotFoundException
* @throws \Exception
*/
public function showShare($token, $path = '') {
\OC_User::setIncognitoMode(true);
// Check whether share exists
try {
$share = $this->shareManager->getShareByToken($token);
} catch (ShareNotFound $e) {
$this->emitAccessShareHook($token, 404, 'Share not found');
return new NotFoundResponse();
}
// Share is password protected - check whether the user is permitted to access the share
if ($share->getPassword() !== null && !$this->linkShareAuth($share)) {
return new RedirectResponse($this->urlGenerator->linkToRoute('files_sharing.sharecontroller.authenticate',
array('token' => $token)));
}
if (!$this->validateShare($share)) {
throw new NotFoundException();
}
// We can't get the path of a file share
try {
if ($share->getNode() instanceof \OCP\Files\File && $path !== '') {
$this->emitAccessShareHook($share, 404, 'Share not found');
throw new NotFoundException();
}
} catch (\Exception $e) {
$this->emitAccessShareHook($share, 404, 'Share not found');
throw $e;
}
$shareTmpl = [];
$shareTmpl['displayName'] = $this->userManager->get($share->getShareOwner())->getDisplayName();
$shareTmpl['owner'] = $share->getShareOwner();
$shareTmpl['filename'] = $share->getNode()->getName();
$shareTmpl['directory_path'] = $share->getTarget();
$shareTmpl['mimetype'] = $share->getNode()->getMimetype();
$shareTmpl['previewSupported'] = $this->previewManager->isMimeSupported($share->getNode()->getMimetype());
$shareTmpl['dirToken'] = $token;
$shareTmpl['sharingToken'] = $token;
$shareTmpl['server2serversharing'] = $this->federatedShareProvider->isOutgoingServer2serverShareEnabled();
$shareTmpl['protected'] = $share->getPassword() !== null ? 'true' : 'false';
$shareTmpl['dir'] = '';
$shareTmpl['nonHumanFileSize'] = $share->getNode()->getSize();
$shareTmpl['fileSize'] = \OCP\Util::humanFileSize($share->getNode()->getSize());
// Show file list
$hideFileList = false;
if ($share->getNode() instanceof \OCP\Files\Folder) {
/** @var \OCP\Files\Folder $rootFolder */
$rootFolder = $share->getNode();
try {
$folderNode = $rootFolder->get($path);
} catch (\OCP\Files\NotFoundException $e) {
$this->emitAccessShareHook($share, 404, 'Share not found');
throw new NotFoundException();
}
$shareTmpl['dir'] = $rootFolder->getRelativePath($folderNode->getPath());
/*
* The OC_Util methods require a view. This just uses the node API
*/
$freeSpace = $share->getNode()->getStorage()->free_space($share->getNode()->getInternalPath());
if ($freeSpace < \OCP\Files\FileInfo::SPACE_UNLIMITED) {
$freeSpace = max($freeSpace, 0);
} else {
$freeSpace = (INF > 0) ? INF: PHP_INT_MAX; // work around https://bugs.php.net/bug.php?id=69188
}
$hideFileList = $share->getPermissions() & \OCP\Constants::PERMISSION_READ ? false : true;
$maxUploadFilesize = $freeSpace;
$folder = new Template('files', 'list', '');
$folder->assign('dir', $rootFolder->getRelativePath($folderNode->getPath()));
$folder->assign('dirToken', $token);
$folder->assign('permissions', \OCP\Constants::PERMISSION_READ);
$folder->assign('isPublic', true);
$folder->assign('hideFileList', $hideFileList);
$folder->assign('publicUploadEnabled', 'no');
$folder->assign('uploadMaxFilesize', $maxUploadFilesize);
$folder->assign('uploadMaxHumanFilesize', \OCP\Util::humanFileSize($maxUploadFilesize));
$folder->assign('freeSpace', $freeSpace);
$folder->assign('usedSpacePercent', 0);
$folder->assign('trash', false);
$shareTmpl['folder'] = $folder->fetchPage();
}
$shareTmpl['hideFileList'] = $hideFileList;
$shareTmpl['shareOwner'] = $this->userManager->get($share->getShareOwner())->getDisplayName();
$shareTmpl['downloadURL'] = $this->urlGenerator->linkToRouteAbsolute('files_sharing.sharecontroller.downloadShare', ['token' => $token]);
$shareTmpl['shareUrl'] = $this->urlGenerator->linkToRouteAbsolute('files_sharing.sharecontroller.showShare', ['token' => $token]);
$shareTmpl['maxSizeAnimateGif'] = $this->config->getSystemValue('max_filesize_animated_gifs_public_sharing', 10);
$shareTmpl['previewEnabled'] = $this->config->getSystemValue('enable_previews', true);
$shareTmpl['previewMaxX'] = $this->config->getSystemValue('preview_max_x', 1024);
$shareTmpl['previewMaxY'] = $this->config->getSystemValue('preview_max_y', 1024);
$shareTmpl['disclaimer'] = $this->config->getAppValue('core', 'shareapi_public_link_disclaimertext', null);
if ($shareTmpl['previewSupported']) {
$shareTmpl['previewImage'] = $this->urlGenerator->linkToRouteAbsolute( 'core_ajax_public_preview',
['x' => 200, 'y' => 200, 'file' => $shareTmpl['directory_path'], 't' => $shareTmpl['dirToken']]);
} else {
$shareTmpl['previewImage'] = $this->urlGenerator->getAbsoluteURL($this->urlGenerator->imagePath('core', 'favicon-fb.png'));
}
// Load files we need
\OCP\Util::addScript('files', 'file-upload');
\OCP\Util::addStyle('files_sharing', 'public');
\OCP\Util::addStyle('files_sharing', 'mobile');
\OCP\Util::addScript('files_sharing', 'public');
\OCP\Util::addScript('files', 'fileactions');
\OCP\Util::addScript('files', 'fileactionsmenu');
\OCP\Util::addScript('files', 'jquery.fileupload');
\OCP\Util::addScript('files_sharing', 'files_drop');
if (isset($shareTmpl['folder'])) {
// JS required for folders
\OCP\Util::addStyle('files', 'files');
\OCP\Util::addStyle('files', 'upload');
\OCP\Util::addScript('files', 'filesummary');
\OCP\Util::addScript('files', 'breadcrumb');
\OCP\Util::addScript('files', 'fileinfomodel');
\OCP\Util::addScript('files', 'newfilemenu');
\OCP\Util::addScript('files', 'files');
\OCP\Util::addScript('files', 'filelist');
\OCP\Util::addScript('files', 'keyboardshortcuts');
}
// OpenGraph Support: http://ogp.me/
\OCP\Util::addHeader('meta', ['property' => "og:title", 'content' => $this->defaults->getName() . ' - ' . $this->defaults->getSlogan()]);
\OCP\Util::addHeader('meta', ['property' => "og:description", 'content' => $this->l10n->t('%s is publicly shared', [$shareTmpl['filename']])]);
\OCP\Util::addHeader('meta', ['property' => "og:site_name", 'content' => $this->defaults->getName()]);
\OCP\Util::addHeader('meta', ['property' => "og:url", 'content' => $shareTmpl['shareUrl']]);
\OCP\Util::addHeader('meta', ['property' => "og:type", 'content' => "object"]);
\OCP\Util::addHeader('meta', ['property' => "og:image", 'content' => $shareTmpl['previewImage']]);
$this->eventDispatcher->dispatch('OCA\Files_Sharing::loadAdditionalScripts');
$csp = new \OCP\AppFramework\Http\ContentSecurityPolicy();
$csp->addAllowedFrameDomain('\'self\'');
$response = new TemplateResponse($this->appName, 'public', $shareTmpl, 'base');
$response->setContentSecurityPolicy($csp);
$this->emitAccessShareHook($share);
return $response;
}
/**
* @PublicPage
* @NoCSRFRequired
*
* @param string $token
* @param string $files
* @param string $path
* @param string $downloadStartSecret
* @return void|\OCP\AppFramework\Http\Response
* @throws NotFoundException
*/
public function downloadShare($token, $files = null, $path = '', $downloadStartSecret = '') {
\OC_User::setIncognitoMode(true);
$share = $this->shareManager->getShareByToken($token);
if(!($share->getPermissions() & \OCP\Constants::PERMISSION_READ)) {
return new \OCP\AppFramework\Http\DataResponse('Share is read-only');
}
// Share is password protected - check whether the user is permitted to access the share
if ($share->getPassword() !== null && !$this->linkShareAuth($share)) {
return new RedirectResponse($this->urlGenerator->linkToRoute('files_sharing.sharecontroller.authenticate',
['token' => $token]));
}
$files_list = null;
if (!is_null($files)) { // download selected files
$files_list = json_decode($files);
// in case we get only a single file
if ($files_list === null) {
$files_list = [$files];
}
}
$userFolder = $this->rootFolder->getUserFolder($share->getShareOwner());
$originalSharePath = $userFolder->getRelativePath($share->getNode()->getPath());
if (!$this->validateShare($share)) {
throw new NotFoundException();
}
// Single file share
if ($share->getNode() instanceof \OCP\Files\File) {
// Single file download
$event = $this->activityManager->generateEvent();
$event->setApp('files_sharing')
->setType(Activity::TYPE_PUBLIC_LINKS)
->setSubject(Activity::SUBJECT_PUBLIC_SHARED_FILE_DOWNLOADED, [$userFolder->getRelativePath($share->getNode()->getPath())])
->setAffectedUser($share->getShareOwner())
->setObject('files', $share->getNode()->getId(), $userFolder->getRelativePath($share->getNode()->getPath()));
$this->activityManager->publish($event);
}
// Directory share
else {
/** @var \OCP\Files\Folder $node */
$node = $share->getNode();
// Try to get the path
if ($path !== '') {
try {
$node = $node->get($path);
} catch (NotFoundException $e) {
$this->emitAccessShareHook($share, 404, 'Share not found');
return new NotFoundResponse();
}
}
$originalSharePath = $userFolder->getRelativePath($node->getPath());
if ($node instanceof \OCP\Files\File) {
// Single file download
$event = $this->activityManager->generateEvent();
$event->setApp('files_sharing')
->setType(Activity::TYPE_PUBLIC_LINKS)
->setSubject(Activity::SUBJECT_PUBLIC_SHARED_FILE_DOWNLOADED, [$userFolder->getRelativePath($node->getPath())])
->setAffectedUser($share->getShareOwner())
->setObject('files', $node->getId(), $userFolder->getRelativePath($node->getPath()));
$this->activityManager->publish($event);
} else if (!empty($files_list)) {
/** @var \OCP\Files\Folder $node */
// Subset of files is downloaded
foreach ($files_list as $file) {
$subNode = $node->get($file);
$event = $this->activityManager->generateEvent();
$event->setApp('files_sharing')
->setType(Activity::TYPE_PUBLIC_LINKS)
->setAffectedUser($share->getShareOwner())
->setObject('files', $subNode->getId(), $userFolder->getRelativePath($subNode->getPath()));
if ($subNode instanceof \OCP\Files\File) {
$event->setSubject(Activity::SUBJECT_PUBLIC_SHARED_FILE_DOWNLOADED, [$userFolder->getRelativePath($subNode->getPath())]);
} else {
$event->setSubject(Activity::SUBJECT_PUBLIC_SHARED_FOLDER_DOWNLOADED, [$userFolder->getRelativePath($subNode->getPath())]);
}
$this->activityManager->publish($event);
}
} else {
// The folder is downloaded
$event = $this->activityManager->generateEvent();
$event->setApp('files_sharing')
->setType(Activity::TYPE_PUBLIC_LINKS)
->setSubject(Activity::SUBJECT_PUBLIC_SHARED_FOLDER_DOWNLOADED, [$userFolder->getRelativePath($node->getPath())])
->setAffectedUser($share->getShareOwner())
->setObject('files', $node->getId(), $userFolder->getRelativePath($node->getPath()));
$this->activityManager->publish($event);
}
}
/* FIXME: We should do this all nicely in OCP */
OC_Util::tearDownFS();
OC_Util::setupFS($share->getShareOwner());
/**
* this sets a cookie to be able to recognize the start of the download
* the content must not be longer than 32 characters and must only contain
* alphanumeric characters
*/
if (!empty($downloadStartSecret)
&& !isset($downloadStartSecret[32])
&& preg_match('!^[a-zA-Z0-9]+$!', $downloadStartSecret) === 1) {
// FIXME: set on the response once we use an actual app framework response
setcookie('ocDownloadStarted', $downloadStartSecret, time() + 20, '/');
}
$this->emitAccessShareHook($share);
$server_params = array( 'head' => $this->request->getMethod() == 'HEAD' );
/**
* Http range requests support
*/
if (isset($_SERVER['HTTP_RANGE'])) {
$server_params['range'] = $this->request->getHeader('Range');
}
// download selected files
if (!is_null($files) && $files !== '') {
// FIXME: The exit is required here because otherwise the AppFramework is trying to add headers as well
// after dispatching the request which results in a "Cannot modify header information" notice.
OC_Files::get($originalSharePath, $files_list, $server_params);
exit();
} else {
// FIXME: The exit is required here because otherwise the AppFramework is trying to add headers as well
// after dispatching the request which results in a "Cannot modify header information" notice.
OC_Files::get(dirname($originalSharePath), basename($originalSharePath), $server_params);
exit();
}
}
}
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