server/apps/files_sharing/lib/controllers/sharecontroller.php

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<?php
/**
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* @author Björn Schießle <schiessle@owncloud.com>
* @author Georg Ehrke <georg@owncloud.com>
* @author Joas Schilling <nickvergessen@owncloud.com>
* @author Lukas Reschke <lukas@owncloud.com>
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* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <icewind@owncloud.com>
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* @author Robin McCorkell <robin@mccorkell.me.uk>
* @author Scrutinizer Auto-Fixer <auto-fixer@scrutinizer-ci.com>
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* @author Vincent Petry <pvince81@owncloud.com>
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*
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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* @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\Controllers;
use OC;
use OC\Files\Filesystem;
use OC_Files;
use OC_Util;
use OCP;
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 OCA\Files_Sharing\Helper;
use OCP\Util;
use OCA\Files_Sharing\Activity;
use \OCP\Files\NotFoundException;
use \OC\Share20\IShare;
use OCP\Files\IRootFolder;
/**
* 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 OC\Share20\Manager */
protected $shareManager;
/** @var ISession */
protected $session;
/** @var IPreview */
protected $previewManager;
/** @var IRootFolder */
protected $rootFolder;
/**
* @param string $appName
* @param IRequest $request
* @param IConfig $config
* @param IURLGenerator $urlGenerator
* @param IUserManager $userManager
* @param ILogger $logger
* @param OCP\Activity\IManager $activityManager
* @param \OC\Share20\Manager $shareManager
* @param ISession $session
* @param IPreview $previewManager
*/
public function __construct($appName,
IRequest $request,
IConfig $config,
IURLGenerator $urlGenerator,
IUserManager $userManager,
ILogger $logger,
\OCP\Activity\IManager $activityManager,
\OC\Share20\Manager $shareManager,
ISession $session,
IPreview $previewManager,
IRootFolder $rootFolder) {
parent::__construct($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;
}
/**
* @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 $password
* @return RedirectResponse|TemplateResponse
*/
public function authenticate($token, $password = '') {
// Check whether share exists
try {
$share = $this->shareManager->getShareByToken($token);
} catch (\OC\Share20\Exception\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 IShare $share
* @param string|null $password
* @return bool
*/
private function linkShareAuth(IShare $share, $password = null) {
if ($password !== null) {
if ($this->shareManager->checkPassword($share, $password)) {
$this->session->set('public_link_authenticated', (string)$share->getId());
} else {
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;
}
/**
* @PublicPage
* @NoCSRFRequired
*
* @param string $token
* @param string $path
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* @return TemplateResponse|RedirectResponse
* @throws NotFoundException
*/
public function showShare($token, $path = '') {
\OC_User::setIncognitoMode(true);
// Check whether share exists
try {
$share = $this->shareManager->getShareByToken($token);
} catch (\OC\Share20\Exception\ShareNotFound $e) {
return new NotFoundResponse();
}
// Share is password protected - check whether the user is permitted to access the share
if ($share->getPassword() !== null && !$this->linkShareAuth($share)) {
return new RedirectResponse($this->urlGenerator->linkToRoute('files_sharing.sharecontroller.authenticate',
array('token' => $token)));
}
// We can't get the path of a file share
if ($share->getPath() instanceof \OCP\Files\File && $path !== '') {
throw new NotFoundException();
}
$rootFolder = null;
if ($share->getPath() instanceof \OCP\Files\Folder) {
/** @var \OCP\Files\Folder $rootFolder */
$rootFolder = $share->getPath();
try {
$path = $rootFolder->get($path);
} catch (\OCP\Files\NotFoundException $e) {
throw new NotFoundException();
}
}
$shareTmpl = [];
$shareTmpl['displayName'] = $share->getShareOwner()->getDisplayName();
$shareTmpl['owner'] = $share->getShareOwner()->getUID();
$shareTmpl['filename'] = $share->getPath()->getName();
$shareTmpl['directory_path'] = $share->getTarget();
$shareTmpl['mimetype'] = $share->getPath()->getMimetype();
$shareTmpl['previewSupported'] = $this->previewManager->isMimeSupported($share->getPath()->getMimetype());
$shareTmpl['dirToken'] = $token;
$shareTmpl['sharingToken'] = $token;
$shareTmpl['server2serversharing'] = Helper::isOutgoingServer2serverShareEnabled();
$shareTmpl['protected'] = $share->getPassword() !== null ? 'true' : 'false';
$shareTmpl['dir'] = '';
$shareTmpl['nonHumanFileSize'] = $share->getPath()->getSize();
$shareTmpl['fileSize'] = \OCP\Util::humanFileSize($share->getPath()->getSize());
// Show file list
if ($share->getPath() instanceof \OCP\Files\Folder) {
$shareTmpl['dir'] = $rootFolder->getRelativePath($path->getPath());
/*
* The OC_Util methods require a view. This just uses the node API
*/
$freeSpace = $share->getPath()->getStorage()->free_space($share->getPath()->getInternalPath());
if ($freeSpace !== \OCP\Files\FileInfo::SPACE_UNKNOWN) {
$freeSpace = max($freeSpace, 0);
} else {
$freeSpace = (INF > 0) ? INF: PHP_INT_MAX; // work around https://bugs.php.net/bug.php?id=69188
}
$uploadLimit = Util::uploadLimit();
$maxUploadFilesize = min($freeSpace, $uploadLimit);
$folder = new Template('files', 'list', '');
$folder->assign('dir', $rootFolder->getRelativePath($path->getPath()));
$folder->assign('dirToken', $token);
$folder->assign('permissions', \OCP\Constants::PERMISSION_READ);
$folder->assign('isPublic', true);
$folder->assign('publicUploadEnabled', 'no');
$folder->assign('uploadMaxFilesize', $maxUploadFilesize);
$folder->assign('uploadMaxHumanFilesize', OCP\Util::humanFileSize($maxUploadFilesize));
$folder->assign('freeSpace', $freeSpace);
$folder->assign('uploadLimit', $uploadLimit); // PHP upload limit
$folder->assign('usedSpacePercent', 0);
$folder->assign('trash', false);
$shareTmpl['folder'] = $folder->fetchPage();
}
$shareTmpl['downloadURL'] = $this->urlGenerator->linkToRouteAbsolute('files_sharing.sharecontroller.downloadShare', array('token' => $token));
$shareTmpl['maxSizeAnimateGif'] = $this->config->getSystemValue('max_filesize_animated_gifs_public_sharing', 10);
$shareTmpl['previewEnabled'] = $this->config->getSystemValue('enable_previews', true);
$csp = new OCP\AppFramework\Http\ContentSecurityPolicy();
$csp->addAllowedFrameDomain('\'self\'');
$response = new TemplateResponse($this->appName, 'public', $shareTmpl, 'base');
$response->setContentSecurityPolicy($csp);
return $response;
}
/**
* @PublicPage
* @NoCSRFRequired
*
* @param string $token
* @param string $files
* @param string $path
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* @param string $downloadStartSecret
* @return void|RedirectResponse
*/
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public function downloadShare($token, $files = null, $path = '', $downloadStartSecret = '') {
\OC_User::setIncognitoMode(true);
$share = $this->shareManager->getShareByToken($token);
// 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()->getUID());
$originalSharePath = $userFolder->getRelativePath($share->getPath()->getPath());
// Single file share
if ($share->getPath() instanceof \OCP\Files\File) {
$this->activityManager->publishActivity(
'files_sharing', Activity::SUBJECT_PUBLIC_SHARED_FILE_DOWNLOADED, [$originalSharePath], '', [],
$originalSharePath, '', $share->getShareOwner()->getUID(), Activity::TYPE_PUBLIC_LINKS, Activity::PRIORITY_MEDIUM
);
}
// Directory share
else {
/** @var \OCP\Files\Folder $node */
$node = $share->getPath();
// Try to get the path
if ($path !== '') {
try {
$node = $node->get($path);
} catch (NotFoundException $e) {
return new NotFoundResponse();
}
}
$originalSharePath = $userFolder->getRelativePath($node->getPath());
if ($node instanceof \OCP\Files\File) {
// Single file download
$this->activityManager->publishActivity(
'files_sharing', Activity::SUBJECT_PUBLIC_SHARED_FILE_DOWNLOADED, [$originalSharePath], '', [],
$originalSharePath, '', $share->getShareOwner()->getUID(), Activity::TYPE_PUBLIC_LINKS, Activity::PRIORITY_MEDIUM
);
} else if (!empty($files_list)) {
/** @var \OCP\Files\Folder $node */
// Subset of files is downloaded
foreach ($files_list as $file) {
$subNode = $node->get($file);
$nodePath = $userFolder->getRelativePath($subNode->getPath());
if ($subNode instanceof \OCP\Files\File) {
$this->activityManager->publishActivity(
'files_sharing', Activity::SUBJECT_PUBLIC_SHARED_FILE_DOWNLOADED, [$nodePath], '', [],
$nodePath, '', $share->getShareOwner()->getUID(), Activity::TYPE_PUBLIC_LINKS, Activity::PRIORITY_MEDIUM
);
} else {
$this->activityManager->publishActivity(
'files_sharing', Activity::SUBJECT_PUBLIC_SHARED_FOLDER_DOWNLOADED, [$nodePath], '', [],
$nodePath, '', $share->getShareOwner()->getUID(), Activity::TYPE_PUBLIC_LINKS, Activity::PRIORITY_MEDIUM
);
}
}
} else {
// The folder is downloaded
$this->activityManager->publishActivity(
'files_sharing', Activity::SUBJECT_PUBLIC_SHARED_FOLDER_DOWNLOADED, [$originalSharePath], '', [],
$originalSharePath, '', $share->getShareOwner()->getUID(), Activity::TYPE_PUBLIC_LINKS, Activity::PRIORITY_MEDIUM
);
}
}
/* FIXME: We should do this all nicely in OCP */
OC_Util::tearDownFS();
OC_Util::setupFS($share->getShareOwner()->getUID());
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/**
* 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', $downloadStartSecret, time() + 20, '/');
}
// download selected files
if (!is_null($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, $_SERVER['REQUEST_METHOD'] == 'HEAD');
exit();
} else {
// FIXME: The exit is required here because otherwise the AppFramework is trying to add headers as well
// after dispatching the request which results in a "Cannot modify header information" notice.
OC_Files::get(dirname($originalSharePath), basename($originalSharePath), $_SERVER['REQUEST_METHOD'] == 'HEAD');
exit();
}
}
}