2024-05-03 18:18:33 +02:00
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<?php
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declare(strict_types=1);
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/**
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* @copyright 2024 Jonathan Treffler <mail@jonathan-treffler.de>
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*
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* @author Jonathan Treffler <mail@jonathan-treffler.de>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program 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 as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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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
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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\DavPush\Dav;
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2024-06-12 01:58:00 +02:00
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use OCA\DavPush\Transport\TransportManager;
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use OCA\DavPush\Db\Subscription;
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use OCA\DavPush\Db\SubscriptionMapper;
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2024-05-03 18:18:33 +02:00
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2024-06-12 01:58:00 +02:00
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use OCP\IUserSession;
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use OCP\IURLGenerator;
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2024-05-03 18:18:33 +02:00
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use OCP\AppFramework\Http;
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use Sabre\DAV\Server;
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use Sabre\DAV\ServerPlugin;
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use Sabre\HTTP\RequestInterface;
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use Sabre\HTTP\ResponseInterface;
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class SubscriptionManagementPlugin extends ServerPlugin {
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public const PUSH_PREFIX = '{DAV:Push}';
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public const PUSH_REGISTER = self::PUSH_PREFIX . "push-register";
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public const PUSH_SUBSCRIPTION = self::PUSH_PREFIX . "subscription";
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public const PUSH_EXPIRES = self::PUSH_PREFIX . "expires";
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2024-06-12 01:58:00 +02:00
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public const IMF_FIXDATE_FORMAT = "D, d M Y H:i:s O+";
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2024-05-03 18:18:33 +02:00
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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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public function __construct(
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private IUserSession $userSession,
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2024-06-12 01:58:00 +02:00
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private TransportManager $transportManager,
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private IURLGenerator $URLGenerator,
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private SubscriptionMapper $subscriptionMapper,
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private $userId,
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2024-05-03 18:18:33 +02:00
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) {
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}
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public function initialize(Server $server): void {
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$this->server = $server;
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$this->server->on('method:POST', [$this, 'httpPost']);
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}
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public function httpPost(RequestInterface $request, ResponseInterface $response) {
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// Only handle xml
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$contentType = (string) $request->getHeader('Content-Type');
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if (!(str_contains($contentType, 'application/xml') || str_contains($contentType, 'text/xml'))) {
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return;
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}
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2024-06-12 01:58:00 +02:00
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$node = $this->server->tree->getNodeForPath($this->server->getRequestUri());
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2024-05-03 18:18:33 +02:00
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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($requestBody);
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$parameters = $this->server->xml->parse($requestBody, $request->getUrl(), $documentType);
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if($documentType == self::PUSH_REGISTER) {
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$errors = [];
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$subscriptionParameterIncluded = False;
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$subscriptionType = "";
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$subscriptionOptions = [];
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$subscriptionExpires = False;
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foreach($parameters as $parameter) {
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if($parameter["name"] == self::PUSH_SUBSCRIPTION && !$subscriptionParameterIncluded) {
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$subscriptionParameterIncluded = True;
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if(sizeof($parameter["value"]) == 1) {
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$subscriptionType = $parameter["value"][0]["name"];
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$subscriptionOptions = $parameter["value"][0]["value"];
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} else {
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$errors[] = "only one subscription allowed";
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}
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2024-06-12 01:58:00 +02:00
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} elseif($parameter["name"] == self::PUSH_EXPIRES && !$subscriptionExpires) {
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$subscriptionExpires = \DateTime::createFromFormat(self::IMF_FIXDATE_FORMAT, $parameter["value"]);
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2024-05-03 18:18:33 +02:00
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}
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}
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if(!$subscriptionParameterIncluded) {
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$errors[] = "no subscription included";
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}
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2024-06-12 01:58:00 +02:00
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$transport = $this->transportManager->getTransport(preg_replace('/^\{DAV:Push\}/', '', $subscriptionType));
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if($transport === null) {
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$errors[] = $subscriptionType . " transport does not exist";
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}
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2024-05-03 18:18:33 +02:00
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2024-06-12 01:58:00 +02:00
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[
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'success' => $registerSuccess,
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'error' => $registerError,
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'responseStatus' => $responseStatus,
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'response' => $responseContent,
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'unsubscribeLink' => $unsubscribeLink,
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'data' => $data
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] = $transport->registerSubscription($subscriptionOptions);
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2024-05-03 18:18:33 +02:00
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2024-06-12 01:58:00 +02:00
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$responseStatus = $responseStatus ?? Http::STATUS_CREATED;
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$data = $data ?? False;
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if(!$registerSuccess) {
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$errors[] = $registerError;
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}
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if(sizeof($errors) == 0) {
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$response->setStatus($responseStatus);
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// create subscription entry in db
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$subscription = new Subscription();
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$subscription->setUserId($this->userId);
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$subscription->setCollectionName($node->getName());
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$subscription->setCreationTimestamp(time());
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if(!$subscriptionExpires) {
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$subscription->setExpirationTimestamp(0);
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} else {
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$subscription->setExpirationTimestamp($subscriptionExpires->getTimestamp());
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}
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$subscription->setData(json_encode($data));
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$subscription = $this->subscriptionMapper->insert($subscription);
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// generate default unsubscribe link, unless transport requested a custom url
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$unsubscribeLink = $unsubscribeLink ?? $this->URLGenerator->getAbsoluteURL("/apps/dav_push/subscriptions/" . $subscription->getId());
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$response->setHeader("Location", $unsubscribeLink);
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$xml = $this->server->xml->write(self::PUSH_REGISTER, $responseContent);
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$response->setBody($xml);
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2024-05-03 18:18:33 +02:00
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} else {
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$response->setStatus(Http::STATUS_BAD_REQUEST);
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$errorsXML = [];
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foreach($errors as $error) {
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$errorsXML[] = [
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"name" => "error",
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"value" => $error
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];
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}
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$xml = $this->server->xml->write(
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'{DAV:}error',
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$errorsXML
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);
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$response->setBody($xml);
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}
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return false;
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}
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}
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}
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