protected DefaultExceptionSubscriber::onHtml(GetResponseForExceptionEvent $event)
Handles any exception as a generic error page for HTML.
Parameters
\Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event: The event to process.
File
- core/lib/Drupal/Core/EventSubscriber/DefaultExceptionSubscriber.php, line 68
Class
- DefaultExceptionSubscriber
- Last-chance handler for exceptions.
Namespace
Drupal\Core\EventSubscriber
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 | protected function onHtml(GetResponseForExceptionEvent $event) { $exception = $event->getException(); $error = Error::decodeException($exception); // Display the message if the current error reporting level allows this type // of message to be displayed, and unconditionally in update.php. $message = ''; if (error_displayable($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'; } // 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'], $root_length + 1); } unset($error['backtrace']); if ($this->getErrorLevel() != ERROR_REPORTING_DISPLAY_VERBOSE) { // Without verbose logging, use a simple message. // We call SafeMarkup::format 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 = SafeMarkup::format('%type: @message in %function (line %line of %file).', $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 = SafeMarkup::format('%type: @message in %function (line %line of %file). <pre class="backtrace">@backtrace</pre>', $error); } } $content = $this->t('The website encountered an unexpected error. Please try again later.'); $content .= $message ? '</br></br>' . $message : ''; $response = new Response($content, 500); 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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