bwaidelich/DispatchComponent.php

## DispatchComponent.php
<?php
namespace Wwwision\Test\Mvc;

/*                                                                        *
 * This script belongs to the TYPO3 Flow package "Wwwision.Test".         *
 *                                                                        *
 *                                                                        */

use TYPO3\Flow\Annotations as Flow;
use TYPO3\Flow\Http\Component\ComponentChain;
use TYPO3\Flow\Http\Component\ComponentContext;
use TYPO3\Flow\Mvc\Routing\UriBuilder;
use TYPO3\Flow\Security\Exception\AccessDeniedException;

/**
 * A custom implementation of the default DispatchComponent that allows for redirecting to a configurable URI upon access denied exceptions
 */
class DispatchComponent extends \TYPO3\Flow\Mvc\DispatchComponent {

	/**
	 * @param ComponentContext $componentContext
	 * @return void
	 */
	public function handle(ComponentContext $componentContext) {
		try {
			parent::handle($componentContext);
		} catch (AccessDeniedException $exception) {
			$this->initiateRedirect($componentContext);
		}
	}

	/**
	 * Triggers the redirect, if configured
	 *
	 * @param ComponentContext $componentContext
	 * @return void
	 */
	protected function initiateRedirect(ComponentContext $componentContext) {
		if (isset($this->options['redirectUriUponAccessDenied']['routeValues'])) {
			$routeValues = $this->options['redirectUriUponAccessDenied']['routeValues'];
			$actionRequest = $componentContext->getParameter('TYPO3\Flow\Mvc\DispatchComponent', 'actionRequest');
			$uriBuilder = new UriBuilder();
			$uriBuilder->setRequest($actionRequest);

			$actionName = $this->extractRouteValue($routeValues, '@action');
			$controllerName = $this->extractRouteValue($routeValues, '@controller');
			$packageKey = $this->extractRouteValue($routeValues, '@package');
			$subPackageKey = $this->extractRouteValue($routeValues, '@subpackage');
			$uri = $uriBuilder->setCreateAbsoluteUri(TRUE)->uriFor($actionName, $routeValues, $controllerName, $packageKey, $subPackageKey);
		} elseif (isset($this->options['redirectUriUponAccessDenied']['uri'])) {
			$uri = $this->options['redirectUriUponAccessDenied']['uri'];
			if (strpos($uri, '://') === FALSE) {
				$uri = $componentContext->getHttpRequest()->getBaseUri() . $uri;
			}
		} else {
				// no redirect URI configured
			return;
		}

		$response = $componentContext->getHttpResponse();
		$response->setContent(sprintf('<html><head><meta http-equiv="refresh" content="0;url=%s"/></head></html>', htmlentities($uri, ENT_QUOTES, 'utf-8')));
		$response->setStatus(303);
		$response->setHeader('Location', $uri);

		$componentContext->setParameter(ComponentChain::class, 'cancel', TRUE);
	}

	/**
	 * Returns the entry $key from the array $routeValues removing the original array item.
	 * If $key does not exist, NULL is returned.
	 *
	 * @param array $routeValues
	 * @param string $key
	 * @return mixed the specified route value or NULL if it is not set
	 */
	protected function extractRouteValue(array &$routeValues, $key) {
		if (!isset($routeValues[$key])) {
			return NULL;
		}
		$routeValue = $routeValues[$key];
		unset($routeValues[$key]);
		return $routeValue;
	}
}

## Settings.yaml
TYPO3:
  Flow:
    http:
      chain:
        'process':
          chain:
            'dispatching':
              component: 'Wwwision\Test\Mvc\DispatchComponent'
              componentOptions:
                'redirectUriUponAccessDenied':
                  routeValues:
                    '@package': 'Wwwision.Test'
                    '@controller': 'Login'
                    '@action': 'login'
	<?php
	namespace Wwwision\Test\Mvc;

	/* *
	* This script belongs to the TYPO3 Flow package "Wwwision.Test". *
	* *
	* */

	use TYPO3\Flow\Annotations as Flow;
	use TYPO3\Flow\Http\Component\ComponentChain;
	use TYPO3\Flow\Http\Component\ComponentContext;
	use TYPO3\Flow\Mvc\Routing\UriBuilder;
	use TYPO3\Flow\Security\Exception\AccessDeniedException;

	/**
	* A custom implementation of the default DispatchComponent that allows for redirecting to a configurable URI upon access denied exceptions
	*/
	class DispatchComponent extends \TYPO3\Flow\Mvc\DispatchComponent {

	/**
	* @param ComponentContext $componentContext
	* @return void
	*/
	public function handle(ComponentContext $componentContext) {
	try {
	parent::handle($componentContext);
	} catch (AccessDeniedException $exception) {
	$this->initiateRedirect($componentContext);
	}
	}

	/**
	* Triggers the redirect, if configured
	*
	* @param ComponentContext $componentContext
	* @return void
	*/
	protected function initiateRedirect(ComponentContext $componentContext) {
	if (isset($this->options['redirectUriUponAccessDenied']['routeValues'])) {
	$routeValues = $this->options['redirectUriUponAccessDenied']['routeValues'];
	$actionRequest = $componentContext->getParameter('TYPO3\Flow\Mvc\DispatchComponent', 'actionRequest');
	$uriBuilder = new UriBuilder();
	$uriBuilder->setRequest($actionRequest);

	$actionName = $this->extractRouteValue($routeValues, '@action');
	$controllerName = $this->extractRouteValue($routeValues, '@controller');
	$packageKey = $this->extractRouteValue($routeValues, '@package');
	$subPackageKey = $this->extractRouteValue($routeValues, '@subpackage');
	$uri = $uriBuilder->setCreateAbsoluteUri(TRUE)->uriFor($actionName, $routeValues, $controllerName, $packageKey, $subPackageKey);
	} elseif (isset($this->options['redirectUriUponAccessDenied']['uri'])) {
	$uri = $this->options['redirectUriUponAccessDenied']['uri'];
	if (strpos($uri, '://') === FALSE) {
	$uri = $componentContext->getHttpRequest()->getBaseUri() . $uri;
	}
	} else {
	// no redirect URI configured
	return;
	}

	$response = $componentContext->getHttpResponse();
	$response->setContent(sprintf('<html><head><meta http-equiv="refresh" content="0;url=%s"/></head></html>', htmlentities($uri, ENT_QUOTES, 'utf-8')));
	$response->setStatus(303);
	$response->setHeader('Location', $uri);

	$componentContext->setParameter(ComponentChain::class, 'cancel', TRUE);
	}

	/**
	* Returns the entry $key from the array $routeValues removing the original array item.
	* If $key does not exist, NULL is returned.
	*
	* @param array $routeValues
	* @param string $key
	* @return mixed the specified route value or NULL if it is not set
	*/
	protected function extractRouteValue(array &$routeValues, $key) {
	if (!isset($routeValues[$key])) {
	return NULL;
	}
	$routeValue = $routeValues[$key];
	unset($routeValues[$key]);
	return $routeValue;
	}
	}
	TYPO3:
	Flow:
	http:
	chain:
	'process':
	chain:
	'dispatching':
	component: 'Wwwision\Test\Mvc\DispatchComponent'
	componentOptions:
	'redirectUriUponAccessDenied':
	routeValues:
	'@package': 'Wwwision.Test'
	'@controller': 'Login'
	'@action': 'login'