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sources/lib/private/appframework/http/dispatcher.php
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<?php
/**
* ownCloud - App Framework
*
* @author Bernhard Posselt, Thomas Tanghus, Bart Visscher
* @copyright 2012 Bernhard Posselt nukeawhale@gmail.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC\AppFramework\Http;
use \OC\AppFramework\Middleware\MiddlewareDispatcher;
use \OC\AppFramework\Http;
use OCP\AppFramework\Controller;
/**
* Class to dispatch the request to the middleware dispatcher
*/
class Dispatcher {
private $middlewareDispatcher;
private $protocol;
/**
* @param Http $protocol the http protocol with contains all status headers
* @param MiddlewareDispatcher $middlewareDispatcher the dispatcher which
* runs the middleware
*/
public function __construct(Http $protocol,
MiddlewareDispatcher $middlewareDispatcher) {
$this->protocol = $protocol;
$this->middlewareDispatcher = $middlewareDispatcher;
}
/**
* Handles a request and calls the dispatcher on the controller
* @param Controller $controller the controller which will be called
* @param string $methodName the method name which will be called on
* the controller
* @return array $array[0] contains a string with the http main header,
* $array[1] contains headers in the form: $key => value, $array[2] contains
* the response output
*/
public function dispatch(Controller $controller, $methodName) {
$out = array(null, array(), null);
try {
$this->middlewareDispatcher->beforeController($controller,
$methodName);
$response = $controller->$methodName();
// if an exception appears, the middleware checks if it can handle the
// exception and creates a response. If no response is created, it is
// assumed that theres no middleware who can handle it and the error is
// thrown again
} catch(\Exception $exception){
$response = $this->middlewareDispatcher->afterException(
$controller, $methodName, $exception);
if (is_null($response)) {
throw $exception;
}
}
$response = $this->middlewareDispatcher->afterController(
$controller, $methodName, $response);
// get the output which should be printed and run the after output
// middleware to modify the response
$output = $response->render();
$out[2] = $this->middlewareDispatcher->beforeOutput(
$controller, $methodName, $output);
// depending on the cache object the headers need to be changed
$out[0] = $this->protocol->getStatusHeader($response->getStatus(),
$response->getLastModified(), $response->getETag());
$out[1] = $response->getHeaders();
return $out;
}
}
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