Zend framework2 手动触发404错误
我一直在努力从另一个控制器侦听器中手动触发Zend framework2 手动触发404错误,zend-framework2,Zend Framework2,我一直在努力从另一个控制器侦听器中手动触发dispatch.error 目标是在路由参数无效时引发404错误,并让标准Zend\Mvc\View\Http\RouteNotFoundStrategy捕获该错误,从而呈现404页面 public function FooController extends AbstractActionController { protected $foo; public function getEventManager() {
dispatch.error
目标是在路由参数无效时引发404错误,并让标准Zend\Mvc\View\Http\RouteNotFoundStrategy
捕获该错误,从而呈现404页面
public function FooController extends AbstractActionController
{
protected $foo;
public function getEventManager()
{
$em = parent::getEventManager();
// Attach with higher priority than dispatched indexAction
$em->attach('dispatch', array($this, 'getFooFromRouteParam'), 10);
}
public function indexAction()
{
$foo = $this->getFoo(); // Error 500 (not 400)
}
public function getFooFromRouteParam(EventInterface $event)
{
$id = $this->params('id', false);
if (! empty($id)) {
$foo = $this->aDatabaseService->loadFromTheDatabase($id);
if ($foo instanceof Foo) {
$this->setFoo($foo);
return;
}
}
$response = $event->getResponse();
$response->setStatusCode(404);
$event->setError(\Zend\Mvc\Application::ERROR_ROUTER_NO_MATCH);
$event->getApplication()
->getEventManager()
->trigger('dispatch.error', $event);
//return $response;
}
public function getObjectFoo()
{
if (null == $this->foo) {
throw new \RuntimeException('foo not set');
}
return $this->foo;
}
public fucntion setObjectFoo(Foo $object)
{
$this->foo = $object;
}
}
事件已正确触发,调试这些事件会提供:
调用了Zend\Mvc\View\Http\RouteNotFoundStrategy::detectNotFoundError
(错误为:找不到错误控制器
)
调用Zend\Mvc\View\Http\RouteNotFoundStrategy::prepareNotFoundViewModel
调用Zend\Mvc\View\Http\RouteNotFoundStrategy::injectNotFoundReason
但是,返回后面的响应会给我一个没有主体的404
return $response; // ends execution with 404 but no body, just white screen.
如果我没有返回响应,调度将继续,我将得到一个500
错误
运行时异常“未设置foo”
如何手动触发404错误并正确呈现404模板?我认为您不能,也不应该。当您在控制器中时,路由器已经完成了它的工作,因此返回到
Zend\Mvc\View\Http\RouteNotFoundStrategy
将不起作用
您应该做的是在路由中设置所需的参数,以便路由器为您进行检查
如果您已经考虑过这一点,但仍然希望对请求处理错误使用404响应,请查看实际DispatchListener如何处理此错误:
$event->setError($application::ERROR_EXCEPTION)
->setController($controllerName)
->setParam('exception', $exception);
$events = $application->getEventManager();
$results = $events->trigger(MvcEvent::EVENT_DISPATCH_ERROR, $event);
$return = $results->last();
if (! $return) {
$return = $event->getResult();
}
终于找到了问题所在
Zend\Mvc\Controller\AbstractController
方法期望在停止执行控制器事件之前返回响应
这是分派
方法的相关部分
$result = $this->getEventManager()->trigger(MvcEvent::EVENT_DISPATCH, $e,
function ($test) {
return ($test instanceof Response);
}
);
if ($result->stopped()) {
return $result->last();
}
return $e->getResult();
我需要做的是返回结果(即错误视图模型)并手动停止事件传播(以确保未执行其余的控制器操作)
适用于Zend Framework 3
手动将触发器404放入控制器并将其放入错误侦听器:
public function articleAction()
{
// For eg. if we can not found article fetched by url_slug
if(!$article){
$this->getResponse()->setStatusCode(404);
$this->getEvent()->setName(MvcEvent::EVENT_DISPATCH_ERROR);
$this->getEvent()->getApplication()->getEventManager()->triggerEvent($this->getEvent());
return false;
}
return ['article' => $article];
}
谢谢你的意见。route参数实际上已经是必需的参数;如果没有提供,它将是404。问题是,我需要使用它加载一个对象,如果该对象无效,则使用404。这不是404,因为请求与操作匹配,并且处理请求时出现问题。404是专门为无法匹配的请求而设计的。在这种情况下,我将使用错误消息(即:flash messages)重定向HTTP响应需要是404
。然而,我认为您对实现细节的理解可能是正确的。我不应该在routenotfound策略中处理错误,而应该在ExceptionStrategy
中处理错误。这将允许我捕获自定义错误,以不同的方式进行解释,并仍然返回404HTTP响应。我会回来报到的。
public function articleAction()
{
// For eg. if we can not found article fetched by url_slug
if(!$article){
$this->getResponse()->setStatusCode(404);
$this->getEvent()->setName(MvcEvent::EVENT_DISPATCH_ERROR);
$this->getEvent()->getApplication()->getEventManager()->triggerEvent($this->getEvent());
return false;
}
return ['article' => $article];
}