1: <?php
 2: /**
 3:  * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
 4:  * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
 5:  *
 6:  * Licensed under The MIT License
 7:  * For full copyright and license information, please see the LICENSE.txt
 8:  * Redistributions of files must retain the above copyright notice.
 9:  *
10:  * @copyright     Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
11:  * @link          http://cakephp.org CakePHP(tm) Project
12:  * @since         CakePHP(tm) v 2.2
13:  * @license       http://www.opensource.org/licenses/mit-license.php MIT License
14:  */
15: 
16: App::uses('DispatcherFilter', 'Routing');
17: 
18: /**
19:  * This filter will check whether the response was previously cached in the file system
20:  * and served it back to the client if appropriate.
21:  *
22:  * @package Cake.Routing.Filter
23:  */
24: class CacheDispatcher extends DispatcherFilter {
25: 
26: /**
27:  * Default priority for all methods in this filter
28:  * This filter should run before the request gets parsed by router
29:  *
30:  * @var int
31:  */
32:     public $priority = 9;
33: 
34: /**
35:  * Checks whether the response was cached and set the body accordingly.
36:  *
37:  * @param CakeEvent $event containing the request and response object
38:  * @return CakeResponse with cached content if found, null otherwise
39:  */
40:     public function beforeDispatch(CakeEvent $event) {
41:         if (Configure::read('Cache.check') !== true) {
42:             return;
43:         }
44: 
45:         $path = $event->data['request']->here();
46:         if ($path === '/') {
47:             $path = 'home';
48:         }
49:         $prefix = Configure::read('Cache.viewPrefix');
50:         if ($prefix) {
51:             $path = $prefix . '_' . $path;
52:         }
53:         $path = strtolower(Inflector::slug($path));
54: 
55:         $filename = CACHE . 'views' . DS . $path . '.php';
56: 
57:         if (!file_exists($filename)) {
58:             $filename = CACHE . 'views' . DS . $path . '_index.php';
59:         }
60:         if (file_exists($filename)) {
61:             $controller = null;
62:             $view = new View($controller);
63:             $view->response = $event->data['response'];
64:             $result = $view->renderCache($filename, microtime(true));
65:             if ($result !== false) {
66:                 $event->stopPropagation();
67:                 $event->data['response']->body($result);
68:                 return $event->data['response'];
69:             }
70:         }
71:     }
72: 
73: }
74: