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<?php |
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namespace MovingImage\Bundle\VMProApiBundle\EventListener; |
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use MovingImage\Bundle\VMProApiBundle\Service\Stopwatch; |
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use Symfony\Component\HttpFoundation\Response; |
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use Symfony\Component\HttpKernel\Event\FilterResponseEvent; |
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use Symfony\Component\HttpKernel\KernelEvents; |
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use Symfony\Component\EventDispatcher\EventSubscriberInterface; |
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/** |
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* Sets the headers with durations of each API request, as well as the total time for all requests. |
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*/ |
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class StopwatchListener implements EventSubscriberInterface |
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{ |
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/** |
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* @var Stopwatch |
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*/ |
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private $stopwatch; |
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/** |
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* @param Stopwatch $stopwatch |
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*/ |
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public function __construct(Stopwatch $stopwatch) |
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{ |
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$this->stopwatch = $stopwatch; |
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} |
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/** |
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* @param FilterResponseEvent $event |
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*/ |
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public function onKernelResponse(FilterResponseEvent $event) |
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{ |
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$totalDuration = 0; |
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foreach ($this->stopwatch->getSections() as $section) { |
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foreach ($section->getEvents() as $name => $stopwatchEvent) { |
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$duration = $stopwatchEvent->getDuration(); |
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$totalDuration += $duration; |
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$this->setHeader($event->getResponse(), $name, $duration); |
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} |
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} |
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$this->setHeader($event->getResponse(), 'total', $totalDuration); |
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} |
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/** |
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* @return array |
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*/ |
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public static function getSubscribedEvents() |
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{ |
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return [ |
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KernelEvents::RESPONSE => 'onKernelResponse', |
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]; |
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} |
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/** |
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* Sets the header for the specified stage (eg X-API-RESPONSE-GET-VIDEOS). |
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* |
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* @param Response $response |
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* @param string $stage |
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* @param int $duration |
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*/ |
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private function setHeader(Response $response, $stage, $duration) |
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{ |
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$headerName = 'X-API-RESPONSE-'.strtoupper($stage); |
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$response->headers->set($headerName, $duration); |
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} |
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} |
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MovingImage24 /
VMProApiBundle
