196 lines
5.0 KiB
PHP
196 lines
5.0 KiB
PHP
<?php
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/**
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* @author Scrutinizer Auto-Fixer <auto-fixer@scrutinizer-ci.com>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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*
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* @copyright Copyright (c) 2016, 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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namespace OCA\DAV\CardDAV\Sharing;
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use OCA\DAV\Connector\Sabre\Auth;
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use OCP\IRequest;
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use Sabre\DAV\Exception\BadRequest;
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use Sabre\DAV\Exception\NotFound;
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use Sabre\DAV\Server;
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use Sabre\DAV\ServerPlugin;
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use Sabre\DAV\XMLUtil;
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use Sabre\DAVACL\IACL;
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use Sabre\HTTP\RequestInterface;
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use Sabre\HTTP\ResponseInterface;
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class Plugin extends ServerPlugin {
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/** @var Auth */
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private $auth;
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/** @var IRequest */
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private $request;
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/**
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* Plugin constructor.
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*
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* @param Auth $authBackEnd
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* @param IRequest $request
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*/
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public function __construct(Auth $authBackEnd, IRequest $request) {
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$this->auth = $authBackEnd;
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$this->request = $request;
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}
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/**
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* Reference to SabreDAV server object.
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*
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* @var \Sabre\DAV\Server
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*/
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protected $server;
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/**
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* This method should return a list of server-features.
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*
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* This is for example 'versioning' and is added to the DAV: header
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* in an OPTIONS response.
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*
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* @return string[]
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*/
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function getFeatures() {
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return ['oc-addressbook-sharing'];
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}
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/**
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* Returns a plugin name.
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*
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* Using this name other plugins will be able to access other plugins
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* using Sabre\DAV\Server::getPlugin
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*
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* @return string
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*/
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function getPluginName() {
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return 'carddav-sharing';
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}
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/**
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* This initializes the plugin.
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*
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* This function is called by Sabre\DAV\Server, after
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* addPlugin is called.
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*
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* This method should set up the required event subscriptions.
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*
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* @param Server $server
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* @return void
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*/
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function initialize(Server $server) {
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$this->server = $server;
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$server->resourceTypeMapping['OCA\\DAV\CardDAV\\ISharedAddressbook'] = '{' . \Sabre\CardDAV\Plugin::NS_CARDDAV . '}shared';
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$this->server->xml->elementMap['{' . \Sabre\CardDAV\Plugin::NS_CARDDAV . '}share'] = 'OCA\\DAV\\CardDAV\\Sharing\\Xml\\ShareRequest';
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$this->server->on('method:POST', [$this, 'httpPost']);
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}
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/**
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* We intercept this to handle POST requests on calendars.
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*
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* @param RequestInterface $request
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* @param ResponseInterface $response
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* @return null|false
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*/
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function httpPost(RequestInterface $request, ResponseInterface $response) {
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$path = $request->getPath();
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// Only handling xml
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$contentType = $request->getHeader('Content-Type');
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if (strpos($contentType, 'application/xml') === false && strpos($contentType, 'text/xml') === false)
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return;
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// Making sure the node exists
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try {
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$node = $this->server->tree->getNodeForPath($path);
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} catch (NotFound $e) {
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return;
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}
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// CSRF protection
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$this->protectAgainstCSRF();
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$requestBody = $request->getBodyAsString();
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// If this request handler could not deal with this POST request, it
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// will return 'null' and other plugins get a chance to handle the
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// request.
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//
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// However, we already requested the full body. This is a problem,
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// because a body can only be read once. This is why we preemptively
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// re-populated the request body with the existing data.
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$request->setBody($requestBody);
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$message = $this->server->xml->parse($requestBody, $request->getUrl(), $documentType);
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switch ($documentType) {
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// Dealing with the 'share' document, which modified invitees on a
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// calendar.
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case '{' . \Sabre\CardDAV\Plugin::NS_CARDDAV . '}share' :
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// We can only deal with IShareableCalendar objects
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if (!$node instanceof IShareableAddressBook) {
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return;
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}
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$this->server->transactionType = 'post-oc-addressbook-share';
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// Getting ACL info
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$acl = $this->server->getPlugin('acl');
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// If there's no ACL support, we allow everything
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if ($acl) {
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/** @var \Sabre\DAVACL\Plugin $acl */
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$acl->checkPrivileges($path, '{DAV:}write');
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}
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$node->updateShares($message->set, $message->remove);
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$response->setStatus(200);
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// Adding this because sending a response body may cause issues,
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// and I wanted some type of indicator the response was handled.
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$response->setHeader('X-Sabre-Status', 'everything-went-well');
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// Breaking the event chain
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return false;
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}
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}
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private function protectAgainstCSRF() {
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$user = $this->auth->getCurrentUser();
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if ($this->auth->isDavAuthenticated($user)) {
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return true;
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}
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if ($this->request->passesCSRFCheck()) {
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return true;
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}
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throw new BadRequest();
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}
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}
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