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<?php
declare(strict_types=1);
/**
* @copyright 2020 Christoph Wurst <christoph@winzerhof-wurst.at>
*
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC\Http\WellKnown;
use OC\AppFramework\Bootstrap\Coordinator;
use OC\AppFramework\Bootstrap\ServiceRegistration;
use OCP\AppFramework\QueryException;
use OCP\Http\WellKnown\IHandler;
use OCP\Http\WellKnown\IRequestContext;
use OCP\Http\WellKnown\IResponse;
use OCP\Http\WellKnown\JrdResponse;
use OCP\IRequest;
use OCP\IServerContainer;
use Psr\Log\LoggerInterface;
use RuntimeException;
use function array_reduce;
class RequestManager {
/** @var Coordinator */
private $coordinator;
/** @var IServerContainer */
private $container;
/** @var LoggerInterface */
private $logger;
public function __construct(Coordinator $coordinator,
IServerContainer $container,
LoggerInterface $logger) {
$this->coordinator = $coordinator;
$this->container = $container;
$this->logger = $logger;
}
public function process(string $service, IRequest $request): ?IResponse {
$handlers = $this->loadHandlers();
$context = new class($request) implements IRequestContext {
/** @var IRequest */
private $request;
public function __construct(IRequest $request) {
$this->request = $request;
}
public function getHttpRequest(): IRequest {
return $this->request;
}
};
$subject = $request->getParam('resource');
$initialResponse = new JrdResponse($subject ?? '');
$finalResponse = array_reduce($handlers, function (?IResponse $previousResponse, IHandler $handler) use ($context, $service) {
return $handler->handle($service, $context, $previousResponse);
}, $initialResponse);
if ($finalResponse instanceof JrdResponse && $finalResponse->isEmpty()) {
return null;
}
return $finalResponse;
}
/**
* @return IHandler[]
*/
private function loadHandlers(): array {
$context = $this->coordinator->getRegistrationContext();
if ($context === null) {
throw new RuntimeException("Well known handlers requested before the apps had been fully registered");
}
$registrations = $context->getWellKnownHandlers();
$this->logger->debug(count($registrations) . " well known handlers registered");
return array_filter(
array_map(function (ServiceRegistration $registration) {
/** @var ServiceRegistration<IHandler> $registration */
$class = $registration->getService();
try {
$handler = $this->container->get($class);
if (!($handler) instanceof IHandler) {
$this->logger->error("Well known handler $class is invalid");
return null;
}
return $handler;
} catch (QueryException $e) {
$this->logger->error("Could not load well known handler $class", [
'exception' => $e,
'app' => $registration->getAppId(),
]);
return null;
}
}, $registrations)
);
}
}
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