Question

有什么办法可以在EVENT_DISPATCH监听器中抛出异常？

class Module
{
    public function onBootstrap(EventInterface $event)
    {
        $application    = $event->getTarget();
        $eventManager   = $application->getEventManager();

        $eventManager->attach(MvcEvent::EVENT_DISPATCH, function(MvcEvent $event) {
            throw new ForbiddenException("403 - Fobidden");
        });
    }
}

我有一种常见的服务方式ForbiddenException，如设置403，返回JSON等等......所有逻辑都附加到MvcEvent::EVENT_DISPATCH_ERROR侦听器。如何将ForbiddenException传递给调度错误侦听器内的侦听器？从调度侦听器抛出它会导致Uncaught异常错误...

任何帮助或提示如何克服它将不胜感激！

Answer 1

您应该使用sharedevent manager来绑定事件。像这样：

public function onBootstrap(MvcEvent $e)
{
    $eventManager = $e->getApplication()->getEventManager();
    $moduleRouteListener = new ModuleRouteListener();
    $moduleRouteListener->attach($eventManager);

    $sharedManager = $e->getApplication()->getEventManager()->getSharedManager();
    $sm = $e->getApplication()->getServiceManager();
    $sharedManager->attach(
         'Zend\Mvc\Application', 
         'dispatch.error',
         function($e) use ($sm) {
            //Do what you want here
         }
    );
}

我建议用一个可调用的类替换匿名函数。

Answer 2

如果我正确理解您，您希望附加到EVENT_DISPATCH_ERROR事件的听众处理您提出的异常。

要做到这一点，您应该使用异常实例自行触发调度错误事件，而不仅仅是throw异常。其中一个参数，例如......

class Module
{
    public function onBootstrap(EventInterface $event)
    {
        $application    = $event->getTarget();
        $eventManager   = $application->getEventManager();

        $eventManager->attach(MvcEvent::EVENT_DISPATCH, function(MvcEvent $event) use ($eventManager) {
            // set some identifier for your error listener to look for
            $event->setError('forbidden');
            // add an instance of your exception
            $event->setParam('exception', new ForbiddenException("403 - Fobidden"));
            // trigger the dispatch error with your event payload
            $eventManager->trigger(MvcEvent::EVENT_DISPATCH_ERROR, $event);
        });
    }
}

一旦触发，您的错误监听器就应该接管并处理您的异常

ZF3 / 2 - 如何捕获EVENT_DISPATCH监听器中抛出的异常？

2 个答案: