vendor/symfony/symfony/src/Symfony/Component/HttpKernel/EventListener/ProfilerListener.php line 100

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  1. <?php
  3. /*
  4.  * This file is part of the Symfony package.
  5.  *
  6.  * (c) Fabien Potencier <[email protected]>
  7.  *
  8.  * For the full copyright and license information, please view the LICENSE
  9.  * file that was distributed with this source code.
  10.  */
  12. namespace Symfony\Component\HttpKernel\EventListener;
  14. use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  15. use Symfony\Component\HttpFoundation\RequestMatcherInterface;
  16. use Symfony\Component\HttpFoundation\RequestStack;
  17. use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
  18. use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
  19. use Symfony\Component\HttpKernel\Event\PostResponseEvent;
  20. use Symfony\Component\HttpKernel\KernelEvents;
  21. use Symfony\Component\HttpKernel\Profiler\Profiler;
  23. /**
  24.  * ProfilerListener collects data for the current request by listening to the kernel events.
  25.  *
  26.  * @author Fabien Potencier <[email protected]>
  27.  */
  28. class ProfilerListener implements EventSubscriberInterface
  29. {
  30.     protected $profiler;
  31.     protected $matcher;
  32.     protected $onlyException;
  33.     protected $onlyMasterRequests;
  34.     protected $exception;
  35.     protected $profiles;
  36.     protected $requestStack;
  37.     protected $parents;
  39.     /**
  40.      * @param Profiler                     $profiler           A Profiler instance
  41.      * @param RequestStack                 $requestStack       A RequestStack instance
  42.      * @param RequestMatcherInterface|null $matcher            A RequestMatcher instance
  43.      * @param bool                         $onlyException      True if the profiler only collects data when an exception occurs, false otherwise
  44.      * @param bool                         $onlyMasterRequests True if the profiler only collects data when the request is a master request, false otherwise
  45.      */
  46.     public function __construct(Profiler $profiler, RequestStack $requestStack, RequestMatcherInterface $matcher = null, $onlyException = false, $onlyMasterRequests = false)
  47.     {
  48.         $this->profiler = $profiler;
  49.         $this->matcher = $matcher;
  50.         $this->onlyException = (bool) $onlyException;
  51.         $this->onlyMasterRequests = (bool) $onlyMasterRequests;
  52.         $this->profiles = new \SplObjectStorage();
  53.         $this->parents = new \SplObjectStorage();
  54.         $this->requestStack = $requestStack;
  55.     }
  57.     /**
  58.      * Handles the onKernelException event.
  59.      */
  60.     public function onKernelException(GetResponseForExceptionEvent $event)
  61.     {
  62.         if ($this->onlyMasterRequests && !$event->isMasterRequest()) {
  63.             return;
  64.         }
  66.         $this->exception = $event->getException();
  67.     }
  69.     /**
  70.      * Handles the onKernelResponse event.
  71.      */
  72.     public function onKernelResponse(FilterResponseEvent $event)
  73.     {
  74.         $master = $event->isMasterRequest();
  75.         if ($this->onlyMasterRequests && !$master) {
  76.             return;
  77.         }
  79.         if ($this->onlyException && null === $this->exception) {
  80.             return;
  81.         }
  83.         $request = $event->getRequest();
  84.         $exception = $this->exception;
  85.         $this->exception = null;
  87.         if (null !== $this->matcher && !$this->matcher->matches($request)) {
  88.             return;
  89.         }
  91.         if (!$profile = $this->profiler->collect($request, $event->getResponse(), $exception)) {
  92.             return;
  93.         }
  95.         $this->profiles[$request] = $profile;
  97.         $this->parents[$request] = $this->requestStack->getParentRequest();
  98.     }
  100.     public function onKernelTerminate(PostResponseEvent $event)
  101.     {
  102.         // attach children to parents
  103.         foreach ($this->profiles as $request) {
  104.             if (null !== $parentRequest = $this->parents[$request]) {
  105.                 if (isset($this->profiles[$parentRequest])) {
  106.                     $this->profiles[$parentRequest]->addChild($this->profiles[$request]);
  107.                 }
  108.             }
  109.         }
  111.         // save profiles
  112.         foreach ($this->profiles as $request) {
  113.             $this->profiler->saveProfile($this->profiles[$request]);
  114.         }
  116.         $this->profiles = new \SplObjectStorage();
  117.         $this->parents = new \SplObjectStorage();
  118.     }
  120.     public static function getSubscribedEvents()
  121.     {
  122.         return [
  123.             KernelEvents::RESPONSE => ['onKernelResponse', -100],
  124.             KernelEvents::EXCEPTION => 'onKernelException',
  125.             KernelEvents::TERMINATE => ['onKernelTerminate', -1024],
  126.         ];
  127.     }
  128. }