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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 memcached 46 * 47 * Registered for URLs with the "memcached" protocol 48 * 49 * For example, `memcached://localhost:11211/?timeout=3600&prefix=sp_` will 50 * connect to memcached 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 * @author Paul L. McNeely 56 * @uses Memcached 57 */ 58 class SimplePie_Cache_Memcached implements SimplePie_Cache_Base 59 { 60 /** 61 * Memcached instance 62 * @var Memcached 63 */ 64 protected $cache; 65 66 /** 67 * Options 68 * @var array 69 */ 70 protected $options; 71 72 /** 73 * Cache name 74 * @var string 75 */ 76 protected $name; 77 78 /** 79 * Create a new cache object 80 * @param string $location Location string (from SimplePie::$cache_location) 81 * @param string $name Unique ID for the cache 82 * @param string $type Either TYPE_FEED for SimplePie data, or TYPE_IMAGE for image data 83 */ 84 public function __construct($location, $name, $type) { 85 $this->options = array( 86 'host' => '127.0.0.1', 87 'port' => 11211, 88 'extras' => array( 89 'timeout' => 3600, // one hour 90 'prefix' => 'simplepie_', 91 ), 92 ); 93 $this->options = SimplePie_Misc::array_merge_recursive($this->options, SimplePie_Cache::parse_URL($location)); 94 95 $this->name = $this->options['extras']['prefix'] . md5("$name:$type"); 96 97 $this->cache = new Memcached(); 98 $this->cache->addServer($this->options['host'], (int)$this->options['port']); 99 } 100 101 /** 102 * Save data to the cache 103 * @param array|SimplePie $data Data to store in the cache. If passed a SimplePie object, only cache the $data property 104 * @return bool Successfulness 105 */ 106 public function save($data) { 107 if ($data instanceof SimplePie) { 108 $data = $data->data; 109 } 110 111 return $this->setData(serialize($data)); 112 } 113 114 /** 115 * Retrieve the data saved to the cache 116 * @return array Data for SimplePie::$data 117 */ 118 public function load() { 119 $data = $this->cache->get($this->name); 120 121 if ($data !== false) { 122 return unserialize($data); 123 } 124 return false; 125 } 126 127 /** 128 * Retrieve the last modified time for the cache 129 * @return int Timestamp 130 */ 131 public function mtime() { 132 $data = $this->cache->get($this->name . '_mtime'); 133 return (int) $data; 134 } 135 136 /** 137 * Set the last modified time to the current time 138 * @return bool Success status 139 */ 140 public function touch() { 141 $data = $this->cache->get($this->name); 142 return $this->setData($data); 143 } 144 145 /** 146 * Remove the cache 147 * @return bool Success status 148 */ 149 public function unlink() { 150 return $this->cache->delete($this->name, 0); 151 } 152 153 /** 154 * Set the last modified time and data to Memcached 155 * @return bool Success status 156 */ 157 private function setData($data) { 158 159 if ($data !== false) { 160 $this->cache->set($this->name . '_mtime', time(), (int)$this->options['extras']['timeout']); 161 return $this->cache->set($this->name, $data, (int)$this->options['extras']['timeout']); 162 } 163 164 return false; 165 } 166 }
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