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<?php
declare(strict_types=1);
/*
* This file is part of the TYPO3 CMS project.
*
* It is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, either version 2
* of the License, or any later version.
*
* For the full copyright and license information, please read the
* LICENSE.txt file that was distributed with this source code.
*
* The TYPO3 project - inspiring people to share!
*/
namespace TYPO3\CMS\Webhooks\MessageHandler;
use Psr\Http\Message\ResponseInterface;
use Psr\Log\LoggerInterface;
use TYPO3\CMS\Core\Http\RequestFactory;
use TYPO3\CMS\Core\Messaging\WebhookMessageInterface;
use TYPO3\CMS\Webhooks\Model\WebhookInstruction;
use TYPO3\CMS\Webhooks\Repository\WebhookRepository;
/**
* A Message Handler to deal with a webhook message.
* It sends the message to all registered HTTP endpoints.
*/
class WebhookMessageHandler
{
private string $algo = 'sha256';
public function __construct(
private readonly WebhookRepository $repository,
private readonly RequestFactory $requestFactory,
private readonly LoggerInterface $logger,
) {}
public function __invoke(WebhookMessageInterface $message): void
{
$configuredWebhooks = $this->repository->getConfiguredWebhooksByType(get_class($message));
foreach ($configuredWebhooks as $webhookInstruction) {
$this->logger->info('Sending webhook', [
'webhook-identifier' => $webhookInstruction->getIdentifier(),
]);
try {
$response = $this->sendRequest($webhookInstruction, $message);
$this->logger->debug('Webhook sent', [
'target_url' => $webhookInstruction->getTargetUrl(),
'response_code' => $response->getStatusCode(),
]);
} catch (\Exception $e) {
$this->logger->error('Webhook sending failed', [
'failure_message' => $e->getMessage(),
]);
}
}
}
protected function sendRequest(WebhookInstruction $webhookInstruction, WebhookMessageInterface $message): ResponseInterface
{
$body = json_encode($message, JSON_THROW_ON_ERROR);
$headers = $this->buildHeaders($webhookInstruction, $body);
$options = [
'headers' => $headers,
'body' => $body,
];
if (!$webhookInstruction->verifySSL()) {
$options['verify'] = false;
}
return $this->requestFactory->request(
$webhookInstruction->getTargetUrl(),
$webhookInstruction->getHttpMethod(),
$options
);
}
private function buildHash(WebhookInstruction $webhookInstruction, string $body): string
{
return hash_hmac($this->algo, sprintf(
'%s:%s',
$webhookInstruction->getIdentifier(),
$body
), $webhookInstruction->getSecret());
}
private function buildHeaders(WebhookInstruction $webhookInstruction, string $body): array
{
$headers = $GLOBALS['TYPO3_CONF_VARS']['HTTP']['headers'] ?? [];
$headers['Content-Type'] = 'application/json';
$headers['Webhook-Signature-Algo'] = $this->algo;
$headers = array_merge($headers, $webhookInstruction->getAdditionalHeaders());
$headers['Webhook-Signature'] = $this->buildHash($webhookInstruction, $body);
return $headers;
}
}