+++ /dev/null
-<?php
-
-namespace Drupal\Core\EventSubscriber;
-
-use Drupal\Component\Utility\SafeMarkup;
-use Drupal\Core\Config\ConfigFactoryInterface;
-use Drupal\Core\StringTranslation\StringTranslationTrait;
-use Drupal\Core\Utility\Error;
-use Symfony\Component\EventDispatcher\EventSubscriberInterface;
-use Symfony\Component\HttpFoundation\JsonResponse;
-use Symfony\Component\HttpFoundation\Request;
-use Symfony\Component\HttpFoundation\Response;
-use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
-use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
-use Symfony\Component\HttpKernel\KernelEvents;
-
-/**
- * Last-chance handler for exceptions.
- *
- * This handler will catch any exceptions not caught elsewhere and report
- * them as an error page.
- */
-class DefaultExceptionSubscriber implements EventSubscriberInterface {
- use StringTranslationTrait;
-
- /**
- * @var string
- *
- * One of the error level constants defined in bootstrap.inc.
- */
- protected $errorLevel;
-
- /**
- * The config factory.
- *
- * @var \Drupal\Core\Config\ConfigFactoryInterface
- */
- protected $configFactory;
-
- /**
- * Constructs a new DefaultExceptionSubscriber.
- *
- * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
- * The configuration factory.
- */
- public function __construct(ConfigFactoryInterface $config_factory) {
- $this->configFactory = $config_factory;
- }
-
- /**
- * Gets the configured error level.
- *
- * @return string
- */
- protected function getErrorLevel() {
- if (!isset($this->errorLevel)) {
- $this->errorLevel = $this->configFactory->get('system.logging')->get('error_level');
- }
- return $this->errorLevel;
- }
-
- /**
- * 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);
-
- // 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);
- }
-
- /**
- * Handles any exception as a generic error page for JSON.
- *
- * @todo This should probably check the error reporting level.
- *
- * @param \Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event
- * The event to process.
- */
- protected function onJson(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,
- $data = NULL;
- if (error_displayable($error) && $message = $exception->getMessage()) {
- $data = ['message' => sprintf('A fatal error occurred: %s', $message)];
- }
-
- $response = new JsonResponse($data, Response::HTTP_INTERNAL_SERVER_ERROR);
- if ($exception instanceof HttpExceptionInterface) {
- $response->setStatusCode($exception->getStatusCode());
- $response->headers->add($exception->getHeaders());
- }
-
- $event->setResponse($response);
- }
-
- /**
- * Handles an HttpExceptionInterface exception for unknown formats.
- *
- * @param \Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event
- * The event to process.
- */
- protected function onFormatUnknown(GetResponseForExceptionEvent $event) {
- /** @var \Symfony\Component\HttpKernel\Exception\HttpExceptionInterface|\Exception $exception */
- $exception = $event->getException();
-
- $response = new Response($exception->getMessage(), $exception->getStatusCode(), $exception->getHeaders());
- $event->setResponse($response);
- }
-
- /**
- * Handles errors for this subscriber.
- *
- * @param \Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event
- * The event to process.
- */
- public function onException(GetResponseForExceptionEvent $event) {
- $format = $this->getFormat($event->getRequest());
- $exception = $event->getException();
-
- $method = 'on' . $format;
- if (!method_exists($this, $method)) {
- if ($exception instanceof HttpExceptionInterface) {
- $this->onFormatUnknown($event);
- $response = $event->getResponse();
- $response->headers->set('Content-Type', 'text/plain');
- }
- else {
- $this->onHtml($event);
- }
- }
- else {
- $this->$method($event);
- }
- }
-
- /**
- * Gets the error-relevant format from the request.
- *
- * @param \Symfony\Component\HttpFoundation\Request $request
- * The request object.
- *
- * @return string
- * The format as which to treat the exception.
- */
- protected function getFormat(Request $request) {
- $format = $request->query->get(MainContentViewSubscriber::WRAPPER_FORMAT, $request->getRequestFormat());
-
- // These are all JSON errors for our purposes. Any special handling for
- // them can/should happen in earlier listeners if desired.
- if (in_array($format, ['drupal_modal', 'drupal_dialog', 'drupal_ajax'])) {
- $format = 'json';
- }
-
- // Make an educated guess that any Accept header type that includes "json"
- // can probably handle a generic JSON response for errors. As above, for
- // any format this doesn't catch or that wants custom handling should
- // register its own exception listener.
- foreach ($request->getAcceptableContentTypes() as $mime) {
- if (strpos($mime, 'html') === FALSE && strpos($mime, 'json') !== FALSE) {
- $format = 'json';
- }
- }
-
- return $format;
- }
-
- /**
- * Registers the methods in this class that should be listeners.
- *
- * @return array
- * An array of event listener definitions.
- */
- public static function getSubscribedEvents() {
- $events[KernelEvents::EXCEPTION][] = ['onException', -256];
- return $events;
- }
-
-}
projects / yaffs-website / blobdiff