101 lines
3.5 KiB
PHP
101 lines
3.5 KiB
PHP
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<?php
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/**
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* ownCloud - App Framework
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*
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* @author Bernhard Posselt
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* @copyright 2012 Bernhard Posselt nukeawhale@gmail.com
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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namespace OC\AppFramework\Middleware;
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use OC\AppFramework\Http\Response;
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/**
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* Middleware is used to provide hooks before or after controller methods and
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* deal with possible exceptions raised in the controller methods.
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* They're modeled after Django's middleware system:
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* https://docs.djangoproject.com/en/dev/topics/http/middleware/
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*/
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abstract class Middleware {
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/**
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* This is being run in normal order before the controller is being
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* called which allows several modifications and checks
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*
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* @param Controller $controller the controller that is being called
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* @param string $methodName the name of the method that will be called on
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* the controller
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*/
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public function beforeController($controller, $methodName){
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}
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/**
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* This is being run when either the beforeController method or the
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* controller method itself is throwing an exception. The middleware is
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* asked in reverse order to handle the exception and to return a response.
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* If the response is null, it is assumed that the exception could not be
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* handled and the error will be thrown again
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*
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* @param Controller $controller the controller that is being called
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* @param string $methodName the name of the method that will be called on
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* the controller
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* @param \Exception $exception the thrown exception
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* @throws \Exception the passed in exception if it cant handle it
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* @return Response a Response object in case that the exception was handled
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*/
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public function afterException($controller, $methodName, \Exception $exception){
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throw $exception;
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}
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/**
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* This is being run after a successful controllermethod call and allows
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* the manipulation of a Response object. The middleware is run in reverse order
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*
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* @param Controller $controller the controller that is being called
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* @param string $methodName the name of the method that will be called on
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* the controller
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* @param Response $response the generated response from the controller
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* @return Response a Response object
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*/
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public function afterController($controller, $methodName, Response $response){
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return $response;
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}
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/**
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* This is being run after the response object has been rendered and
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* allows the manipulation of the output. The middleware is run in reverse order
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*
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* @param Controller $controller the controller that is being called
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* @param string $methodName the name of the method that will be called on
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* the controller
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* @param string $output the generated output from a response
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* @return string the output that should be printed
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*/
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public function beforeOutput($controller, $methodName, $output){
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return $output;
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}
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}
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