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1 <?php
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2
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3 namespace Drupal\Core\EventSubscriber;
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4
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5 use Drupal\Core\Routing\RouteBuildEvent;
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6 use Drupal\Core\Routing\RoutingEvents;
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7 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
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8
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9 /**
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10 * Provides a default value for the HTTP method restriction on routes.
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11 *
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12 * Most routes will only deal with GET and POST requests, so we restrict them to
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13 * those two if nothing else is specified. This is necessary to give other
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14 * routes a chance during the route matching process when they are listening
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15 * for example to DELETE requests on the same path. A typical use case are REST
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16 * web service routes that use the full spectrum of HTTP methods.
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17 */
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18 class RouteMethodSubscriber implements EventSubscriberInterface {
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19
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20 /**
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21 * Sets a default value of GET|POST for the _method route property.
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22 *
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23 * @param \Drupal\Core\Routing\RouteBuildEvent $event
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24 * The event containing the build routes.
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25 */
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26 public function onRouteBuilding(RouteBuildEvent $event) {
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27 foreach ($event->getRouteCollection() as $route) {
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28 $methods = $route->getMethods();
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29 if (empty($methods)) {
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30 $route->setMethods(['GET', 'POST']);
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31 }
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32 }
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33 }
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34
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35 /**
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36 * {@inheritdoc}
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37 */
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38 public static function getSubscribedEvents() {
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39 // Set a higher priority to ensure that routes get the default HTTP methods
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40 // as early as possible.
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41 $events[RoutingEvents::ALTER][] = ['onRouteBuilding', 5000];
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42 return $events;
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43 }
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44
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45 }
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