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 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Server
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * Zend_Server_Cache: cache server definitions
  *
  * @category   Zend
  * @package    Zend_Server
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Server_Cache
 {
     /**
      * @var array Methods to skip when caching server
      */
     protected static $_skipMethods = array();
 
     /**
      * Cache a file containing the dispatch list.
      *
      * Serializes the server definition stores the information
      * in $filename.
      *
      * Returns false on any error (typically, inability to write to file), true
      * on success.
      *
      * @param  string $filename
      * @param  Zend_Server_Interface $server
      * @return bool
      */
     public static function save($filename, Zend_Server_Interface $server)
     {
         if (!is_string($filename)
             || (!file_exists($filename) && !is_writable(dirname($filename))))
         {
             return false;
         }
 
         $methods = $server->getFunctions();
 
         if ($methods instanceof Zend_Server_Definition) {
             $definition = new Zend_Server_Definition();
             foreach ($methods as $method) {
                 if (in_array($method->getName(), self::$_skipMethods)) {
                     continue;
                 }
                 $definition->addMethod($method);
             }
             $methods = $definition;
         }
 
         if (0 === @file_put_contents($filename, serialize($methods))) {
             return false;
         }
 
         return true;
     }
 
     /**
      * Load server definition from a file
      *
      * Unserializes a stored server definition from $filename. Returns false if
      * it fails in any way, true on success.
      *
      * Useful to prevent needing to build the server definition on each
      * request. Sample usage:
      *
      * <code>
      * if (!Zend_Server_Cache::get($filename, $server)) {
      *     // require_once 'Some/Service/Class.php';
      *     // require_once 'Another/Service/Class.php';
      *
      *     // Attach Some_Service_Class with namespace 'some'
      *     $server->attach('Some_Service_Class', 'some');
      *
      *     // Attach Another_Service_Class with namespace 'another'
      *     $server->attach('Another_Service_Class', 'another');
      *
      *     Zend_Server_Cache::save($filename, $server);
      * }
      *
      * $response = $server->handle();
      * echo $response;
      * </code>
      *
      * @param  string $filename
      * @param  Zend_Server_Interface $server
      * @return bool
      */
     public static function get($filename, Zend_Server_Interface $server)
     {
         if (!is_string($filename)
             || !file_exists($filename)
             || !is_readable($filename))
         {
             return false;
         }
 
 
         if (false === ($dispatch = @file_get_contents($filename))) {
             return false;
         }
 
         if (false === ($dispatchArray = @unserialize($dispatch))) {
             return false;
         }
 
         $server->loadFunctions($dispatchArray);
 
         return true;
     }
 
     /**
      * Remove a cache file
      *
      * @param  string $filename
      * @return boolean
      */
     public static function delete($filename)
     {
         if (is_string($filename) && file_exists($filename)) {
             unlink($filename);
             return true;
         }
 
         return false;
     }
 }