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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) 2004-2016, Ryan Parman, Sam 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 * @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue 37 * @author Ryan Parman 38 * @author Sam Sneddon 39 * @author Ryan McCue 40 * @link http://simplepie.org/ SimplePie 41 * @license http://www.opensource.org/licenses/bsd-license.php BSD License 42 */ 43 44 /** 45 * Caches data to memcache 46 * 47 * Registered for URLs with the "memcache" protocol 48 * 49 * For example, `memcache://localhost:11211/?timeout=3600&prefix=sp_` will 50 * connect to memcache on `localhost` on port 11211. All tables will be 51 * prefixed with `sp_` and data will expire after 3600 seconds 52 * 53 * @package SimplePie 54 * @subpackage Caching 55 * @uses Memcache 56 */ 57 class SimplePie_Cache_Memcache implements SimplePie_Cache_Base 58 { 59 /** 60 * Memcache instance 61 * 62 * @var Memcache 63 */ 64 protected $cache; 65 66 /** 67 * Options 68 * 69 * @var array 70 */ 71 protected $options; 72 73 /** 74 * Cache name 75 * 76 * @var string 77 */ 78 protected $name; 79 80 /** 81 * Create a new cache object 82 * 83 * @param string $location Location string (from SimplePie::$cache_location) 84 * @param string $name Unique ID for the cache 85 * @param string $type Either TYPE_FEED for SimplePie data, or TYPE_IMAGE for image data 86 */ 87 public function __construct($location, $name, $type) 88 { 89 $this->options = array( 90 'host' => '127.0.0.1', 91 'port' => 11211, 92 'extras' => array( 93 'timeout' => 3600, // one hour 94 'prefix' => 'simplepie_', 95 ), 96 ); 97 $this->options = SimplePie_Misc::array_merge_recursive($this->options, SimplePie_Cache::parse_URL($location)); 98 99 $this->name = $this->options['extras']['prefix'] . md5("$name:$type"); 100 101 $this->cache = new Memcache(); 102 $this->cache->addServer($this->options['host'], (int) $this->options['port']); 103 } 104 105 /** 106 * Save data to the cache 107 * 108 * @param array|SimplePie $data Data to store in the cache. If passed a SimplePie object, only cache the $data property 109 * @return bool Successfulness 110 */ 111 public function save($data) 112 { 113 if ($data instanceof SimplePie) 114 { 115 $data = $data->data; 116 } 117 return $this->cache->set($this->name, serialize($data), MEMCACHE_COMPRESSED, (int) $this->options['extras']['timeout']); 118 } 119 120 /** 121 * Retrieve the data saved to the cache 122 * 123 * @return array Data for SimplePie::$data 124 */ 125 public function load() 126 { 127 $data = $this->cache->get($this->name); 128 129 if ($data !== false) 130 { 131 return unserialize($data); 132 } 133 return false; 134 } 135 136 /** 137 * Retrieve the last modified time for the cache 138 * 139 * @return int Timestamp 140 */ 141 public function mtime() 142 { 143 $data = $this->cache->get($this->name); 144 145 if ($data !== false) 146 { 147 // essentially ignore the mtime because Memcache expires on its own 148 return time(); 149 } 150 151 return false; 152 } 153 154 /** 155 * Set the last modified time to the current time 156 * 157 * @return bool Success status 158 */ 159 public function touch() 160 { 161 $data = $this->cache->get($this->name); 162 163 if ($data !== false) 164 { 165 return $this->cache->set($this->name, $data, MEMCACHE_COMPRESSED, (int) $this->options['extras']['timeout']); 166 } 167 168 return false; 169 } 170 171 /** 172 * Remove the cache 173 * 174 * @return bool Success status 175 */ 176 public function unlink() 177 { 178 return $this->cache->delete($this->name, 0); 179 } 180 }
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