/**
* Processes a generic exception into an HTTP 500 response.
*
* @param \Symfony\Component\Debug\Exception\FlattenException $exception
* Metadata about the exception that was thrown.
* @param \Symfony\Component\HttpFoundation\Request $request
* The request object that triggered this exception.
*
* @return \Symfony\Component\HttpFoundation\Response
* A response object.
*/
public function on500Html(FlattenException $exception, Request $request)
{
$error = $this->decodeException($exception);
// Because the kernel doesn't run until full bootstrap, we know that
// most subsystems are already initialized.
$headers = array();
// When running inside the testing framework, we relay the errors
// to the tested site by the way of HTTP headers.
if (DRUPAL_TEST_IN_CHILD_SITE && !headers_sent() && (!defined('SIMPLETEST_COLLECT_ERRORS') || SIMPLETEST_COLLECT_ERRORS)) {
// $number does not use drupal_static as it should not be reset
// as it uniquely identifies each PHP error.
static $number = 0;
$assertion = array($error['!message'], $error['%type'], array('function' => $error['%function'], 'file' => $error['%file'], 'line' => $error['%line']));
$headers['X-Drupal-Assertion-' . $number] = rawurlencode(serialize($assertion));
$number++;
}
watchdog('php', '%type: !message in %function (line %line of %file).', $error, $error['severity_level']);
// Display the message if the current error reporting level allows this type
// of message to be displayed, and unconditionnaly in update.php.
if (error_displayable($error)) {
$class = 'error';
// If error type is 'User notice' then treat it as debug information
// instead of an error message.
// @see debug()
if ($error['%type'] == 'User notice') {
$error['%type'] = 'Debug';
$class = 'status';
}
// Attempt to reduce verbosity by removing DRUPAL_ROOT from the file path
// in the message. This does not happen for (false) security.
$root_length = strlen(DRUPAL_ROOT);
if (substr($error['%file'], 0, $root_length) == DRUPAL_ROOT) {
$error['%file'] = substr($error['%file'], $root_length + 1);
}
// Should not translate the string to avoid errors producing more errors.
$message = String::format('%type: !message in %function (line %line of %file).', $error);
// Check if verbose error reporting is on.
$error_level = $this->container->get('config.factory')->get('system.logging')->get('error_level');
if ($error_level == ERROR_REPORTING_DISPLAY_VERBOSE) {
$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.
$message .= '<pre class="backtrace">' . Error::formatFlattenedBacktrace($backtrace) . '</pre>';
}
drupal_set_message(SafeMarkup::set($message), $class, TRUE);
}
$content = $this->t('The website has encountered an error. Please try again later.');
$output = DefaultHtmlPageRenderer::renderPage($content, $this->t('Error'));
$response = new Response($output);
$response->setStatusCode(500, '500 Service unavailable (with message)');
return $response;
}
/**
* Handles any exception as a generic error page for HTML.
*
* @param \Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event
* The event to process.
*/
protected function onHtml(GetResponseForExceptionEvent $event)
{
$exception = $event->getException();
$error = Error::decodeException($exception);
$flatten_exception = FlattenException::create($exception, 500);
// Display the message if the current error reporting level allows this type
// of message to be displayed, and unconditionally in update.php.
if (error_displayable($error)) {
$class = 'error';
// If error type is 'User notice' then treat it as debug information
// instead of an error message.
// @see debug()
if ($error['%type'] == 'User notice') {
$error['%type'] = 'Debug';
$class = 'status';
}
// Attempt to reduce verbosity by removing DRUPAL_ROOT from the file path
// in the message. This does not happen for (false) security.
$root_length = strlen(DRUPAL_ROOT);
if (substr($error['%file'], 0, $root_length) == DRUPAL_ROOT) {
$error['%file'] = substr($error['%file'], $root_length + 1);
}
// Do not translate the string to avoid errors producing more errors.
unset($error['backtrace']);
$message = String::format('%type: !message in %function (line %line of %file).', $error);
// Check if verbose error reporting is on.
if ($this->getErrorLevel() == ERROR_REPORTING_DISPLAY_VERBOSE) {
$backtrace_exception = $flatten_exception;
while ($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.
$message .= '<pre class="backtrace">' . Error::formatFlattenedBacktrace($backtrace) . '</pre>';
}
drupal_set_message(SafeMarkup::set($message), $class, TRUE);
}
$content = $this->t('The website has encountered an error. Please try again later.');
$output = DefaultHtmlPageRenderer::renderPage($content, $this->t('Error'));
$response = new Response($output);
if ($exception instanceof HttpExceptionInterface) {
$response->setStatusCode($exception->getStatusCode());
} else {
$response->setStatusCode(Response::HTTP_INTERNAL_SERVER_ERROR, '500 Service unavailable (with message)');
}
$event->setResponse($response);
}
