function FinalExceptionSubscriber::onException
Same name in other branches
- 8.9.x core/lib/Drupal/Core/EventSubscriber/FinalExceptionSubscriber.php \Drupal\Core\EventSubscriber\FinalExceptionSubscriber::onException()
- 10 core/lib/Drupal/Core/EventSubscriber/FinalExceptionSubscriber.php \Drupal\Core\EventSubscriber\FinalExceptionSubscriber::onException()
- 11.x core/lib/Drupal/Core/EventSubscriber/FinalExceptionSubscriber.php \Drupal\Core\EventSubscriber\FinalExceptionSubscriber::onException()
Handles exceptions for this subscriber.
Parameters
\Symfony\Component\HttpKernel\Event\ExceptionEvent $event: The event to process.
File
-
core/
lib/ Drupal/ Core/ EventSubscriber/ FinalExceptionSubscriber.php, line 79
Class
- FinalExceptionSubscriber
- Last-chance handler for exceptions: the final exception subscriber.
Namespace
Drupal\Core\EventSubscriberCode
public function onException(ExceptionEvent $event) {
$exception = $event->getThrowable();
$error = Error::decodeException($exception);
// Display the message if the current error reporting level allows this type
// of message to be displayed, and unconditionally in update.php.
$message = '';
if ($this->isErrorDisplayable($error)) {
// If error type is 'User notice' then treat it as debug information
// instead of an error message.
if ($error['%type'] == 'User notice') {
$error['%type'] = 'Debug';
}
$error = $this->simplifyFileInError($error);
unset($error['backtrace'], $error['exception'], $error['severity_level']);
if (!$this->isErrorLevelVerbose()) {
// Without verbose logging, use a simple message.
// We use \Drupal\Component\Render\FormattableMarkup directly here,
// rather than use t() since we are in the middle of error handling, and
// we don't want t() to cause further errors.
$message = new FormattableMarkup(Error::DEFAULT_ERROR_MESSAGE, $error);
}
else {
// With verbose logging, we will also include a backtrace.
$backtrace_exception = $exception;
while ($backtrace_exception->getPrevious()) {
$backtrace_exception = $backtrace_exception->getPrevious();
}
$backtrace = $backtrace_exception->getTrace();
// First trace is the error itself, already contained in the message.
// While the second trace is the error source and also contained in the
// message, the message doesn't contain argument values, so we output it
// once more in the backtrace.
array_shift($backtrace);
// Generate a backtrace containing only scalar argument values.
$error['@backtrace'] = Error::formatBacktrace($backtrace);
$message = new FormattableMarkup(Error::DEFAULT_ERROR_MESSAGE . ' <pre class="backtrace">@backtrace</pre>', $error);
}
}
$content_type = $event->getRequest()
->getRequestFormat() == 'html' ? 'text/html' : 'text/plain';
$content = $this->t('The website encountered an unexpected error. Please try again later.');
$content .= $message ? '<br><br>' . $message : '';
$response = new Response($content, 500, [
'Content-Type' => $content_type,
]);
if ($exception instanceof HttpExceptionInterface) {
$response->setStatusCode($exception->getStatusCode());
$response->headers
->add($exception->getHeaders());
}
else {
$response->setStatusCode(Response::HTTP_INTERNAL_SERVER_ERROR, '500 Service unavailable (with message)');
}
$event->setResponse($response);
}
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