inc/3rdparty/libraries/simplepie/library/SimplePie/Cache.php

   1 <?php
   2 /**
   3  * SimplePie
   4  *
   5  * A PHP-Based RSS and Atom Feed Framework.
   6  * Takes the hard work out of managing a complete RSS/Atom solution.
   7  *
   8  * Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without modification, are
  12  * permitted provided that the following conditions are met:
  13  *
  14  *      * Redistributions of source code must retain the above copyright notice, this list of
  15  *        conditions and the following disclaimer.
  16  *
  17  *      * Redistributions in binary form must reproduce the above copyright notice, this list
  18  *        of conditions and the following disclaimer in the documentation and/or other materials
  19  *        provided with the distribution.
  20  *
  21  *      * Neither the name of the SimplePie Team nor the names of its contributors may be used
  22  *        to endorse or promote products derived from this software without specific prior
  23  *        written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
  26  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  27  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
  28  * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  30  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  31  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  32  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33  * POSSIBILITY OF SUCH DAMAGE.
  34  *
  35  * @package SimplePie
  36  * @version 1.3.1
  37  * @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue
  38  * @author Ryan Parman
  39  * @author Geoffrey Sneddon
  40  * @author Ryan McCue
  41  * @link http://simplepie.org/ SimplePie
  42  * @license http://www.opensource.org/licenses/bsd-license.php BSD License
  43  */
  44
  45 /**
  46  * Used to create cache objects
  47  *
  48  * This class can be overloaded with {@see SimplePie::set_cache_class()},
  49  * although the preferred way is to create your own handler
  50  * via {@see register()}
  51  *
  52  * @package SimplePie
  53  * @subpackage Caching
  54  */
  55 class SimplePie_Cache
  56 {
  57         /**
  58          * Cache handler classes
  59          *
  60          * These receive 3 parameters to their constructor, as documented in
  61          * {@see register()}
  62          * @var array
  63          */
  64         protected static $handlers = array(
  65                 'mysql' => 'SimplePie_Cache_MySQL',
  66                 'memcache' => 'SimplePie_Cache_Memcache',
  67         );
  68
  69         /**
  70          * Don't call the constructor. Please.
  71          */
  72         private function __construct() { }
  73
  74         /**
  75          * Create a new SimplePie_Cache object
  76          *
  77          * @param string $location URL location (scheme is used to determine handler)
  78          * @param string $filename Unique identifier for cache object
  79          * @param string $extension 'spi' or 'spc'
  80          * @return SimplePie_Cache_Base Type of object depends on scheme of `$location`
  81          */
  82         public static function get_handler($location, $filename, $extension)
  83         {
  84                 $type = explode(':', $location, 2);
  85                 $type = $type[0];
  86                 if (!empty(self::$handlers[$type]))
  87                 {
  88                         $class = self::$handlers[$type];
  89                         return new $class($location, $filename, $extension);
  90                 }
  91
  92                 return new SimplePie_Cache_File($location, $filename, $extension);
  93         }
  94
  95         /**
  96          * Create a new SimplePie_Cache object
  97          *
  98          * @deprecated Use {@see get_handler} instead
  99          */
 100         public function create($location, $filename, $extension)
 101         {
 102                 trigger_error('Cache::create() has been replaced with Cache::get_handler(). Switch to the registry system to use this.', E_USER_DEPRECATED);
 103                 return self::get_handler($location, $filename, $extension);
 104         }
 105
 106         /**
 107          * Register a handler
 108          *
 109          * @param string $type DSN type to register for
 110          * @param string $class Name of handler class. Must implement SimplePie_Cache_Base
 111          */
 112         public static function register($type, $class)
 113         {
 114                 self::$handlers[$type] = $class;
 115         }
 116
 117         /**
 118          * Parse a URL into an array
 119          *
 120          * @param string $url
 121          * @return array
 122          */
 123         public static function parse_URL($url)
 124         {
 125                 $params = parse_url($url);
 126                 $params['extras'] = array();
 127                 if (isset($params['query']))
 128                 {
 129                         parse_str($params['query'], $params['extras']);
 130                 }
 131                 return $params;
 132         }
 133 }