ZF Snippets

1
2
3
4
56
7
8
9
1011
12
13
14
1516
17
18
19
2021
22
23
24
2526
27
28
29
3031
32
33
34
3536
37
38
39
4041
42
43
44
4546
47
48
49
5051
52
53
54
5556
57
58
59
6061
62
63
64
6566
67
68
69
7071
72
73
74
7576
77
78
79
8081
82
83
84
8586
87
88
89
9091
92
93
94
9596
97
98
99

<?php
 
/**
 * A Zend_Controller_Front plugin to give HTTP Gateway Cache capabilities to a Zend Framework application
 * * @author Christian Soronellas <theunic@gmail.com>
 */
class Zend_Controller_Plugin_HttpGatewayCache extends Zend_Controller_Plugin_Abstract
{
    /**     * The cache
     * @var Zend_Cache_Core
     */
    protected $_cache;
        /**
     * A flag for whether the response comes already cached
     * 
     * @var boolean
     */    protected $_responseCached = false;
 
    /**
     * Class constructor
     */    public function __construct(Zend_Cache_Core $cache)
    {
        $this->_cache = $cache;
    }
     /**
     * \\\"dispatchLoopStartup\\\" event. Fired when the dispatch loop starts.
     */
    public function dispatchLoopStartup(Zend_Controller_Request_Abstract $request)
    {        if (false !== ($data = $this->_cache->load($this->_getCacheKey($request)))) {
            $this->_process($data);
            $this->_responseCached = true;
            $request->isDispatched(true);
        }    }
    
    /**
     * "dispatchLoopShutdown" event. Fired when the dispatch loop has finished.
     */    public function dispatchLoopShutdown()
    {
        // Here we have a full generated response, so replace ESI parts,
        // cache the response, and go on.
        if (!$this->_responseCached) {            $content = $this->getResponse()->getBody();
            
            // Get the "Cache-control" header and extract the value. This
            // value will be the cached content lifetime. If no "Cache-control"
            // header set, the content won't be cached.            foreach ($this->getResponse()->getHeaders() as $header) {
                if ('cache-control' == strtolower($header['name'])) {
                    // Extract the value, cache the content and go sleep! :)
                    $lifetime = (int) sscanf(trim($header['value']), 'max-age=%d');
                    $this->_cache->save($content, $this->_getCacheKey($request), array(), $lifetime);                }
            }
 
            $this->_process($content);
        }    }
    
    /**
     * Generates a cache key using the Request's path info
     *      * @param Zend_Controller_Request_Abstract $request
     * @return string
     */
    protected function _getCacheKey(Zend_Controller_Request_Abstract $request)
    {        return md5($this->getRequest()->getPathInfo());
    }
 
    /**
     * Search for any esi include, and replace by its content     */
    protected function _process($content)
    {
        $matches = array();
        if (preg_match_all('#<esi\:include\s+src="(.*?)"\s*/>#', $content, $matches) > 0) {            $frontController = Zend_Controller_Front::getInstance();
            $frontController->returnResponse(true);
 
            foreach ($matches as $match) {
                $request = new Zend_Controller_Request_Http($match[1] . '?standalone');                $response = $frontController->dispatch($request);
                $content = str_replace($match[0], $response->getBody(), $content);
            }
 
            $this->getResponse()->setBody($content);            $frontController->returnResponse(false);
        }
    }
}