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454 lines
13 KiB
454 lines
13 KiB
<?php
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/**
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* SimplePie
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*
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* A PHP-Based RSS and Atom Feed Framework.
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* Takes the hard work out of managing a complete RSS/Atom solution.
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*
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* Copyright (c) 2004-2016, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification, are
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* permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* * Neither the name of the SimplePie Team nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
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* AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* @package SimplePie
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* @copyright 2004-2016 Ryan Parman, Geoffrey Sneddon, Ryan McCue
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* @author Ryan Parman
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* @author Geoffrey Sneddon
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* @author Ryan McCue
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* @link http://simplepie.org/ SimplePie
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* @license http://www.opensource.org/licenses/bsd-license.php BSD License
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*/
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/**
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* Caches data to a MySQL database
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*
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* Registered for URLs with the "mysql" protocol
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*
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* For example, `mysql://root:password@localhost:3306/mydb?prefix=sp_` will
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* connect to the `mydb` database on `localhost` on port 3306, with the user
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* `root` and the password `password`. All tables will be prefixed with `sp_`
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*
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* @package SimplePie
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* @subpackage Caching
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*/
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class SimplePie_Cache_MySQL extends SimplePie_Cache_DB
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{
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/**
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* PDO instance
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*
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* @var PDO
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*/
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protected $mysql;
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/**
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* Options
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*
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* @var array
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*/
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protected $options;
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/**
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* Cache ID
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*
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* @var string
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*/
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protected $id;
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/**
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* Create a new cache object
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*
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* @param string $location Location string (from SimplePie::$cache_location)
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* @param string $name Unique ID for the cache
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* @param string $type Either TYPE_FEED for SimplePie data, or TYPE_IMAGE for image data
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*/
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public function __construct($location, $name, $type)
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{
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$this->options = array(
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'user' => null,
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'pass' => null,
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'host' => '127.0.0.1',
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'port' => '3306',
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'path' => '',
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'extras' => array(
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'prefix' => '',
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'cache_purge_time' => 2592000
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),
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);
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$this->options = SimplePie_Misc::array_merge_recursive($this->options, SimplePie_Cache::parse_URL($location));
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// Path is prefixed with a "/"
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$this->options['dbname'] = substr($this->options['path'], 1);
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try
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{
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$this->mysql = new PDO("mysql:dbname={$this->options['dbname']};host={$this->options['host']};port={$this->options['port']}", $this->options['user'], $this->options['pass'], array(PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8'));
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}
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catch (PDOException $e)
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{
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$this->mysql = null;
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return;
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}
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$this->id = $name . $type;
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if (!$query = $this->mysql->query('SHOW TABLES'))
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{
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$this->mysql = null;
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return;
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}
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$db = array();
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while ($row = $query->fetchColumn())
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{
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$db[] = $row;
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}
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if (!in_array($this->options['extras']['prefix'] . 'cache_data', $db))
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{
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$query = $this->mysql->exec('CREATE TABLE `' . $this->options['extras']['prefix'] . 'cache_data` (`id` TEXT CHARACTER SET utf8 NOT NULL, `items` SMALLINT NOT NULL DEFAULT 0, `data` BLOB NOT NULL, `mtime` INT UNSIGNED NOT NULL, UNIQUE (`id`(125)))');
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if ($query === false)
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{
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trigger_error("Can't create " . $this->options['extras']['prefix'] . "cache_data table, check permissions", E_USER_WARNING);
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$this->mysql = null;
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return;
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}
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}
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if (!in_array($this->options['extras']['prefix'] . 'items', $db))
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{
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$query = $this->mysql->exec('CREATE TABLE `' . $this->options['extras']['prefix'] . 'items` (`feed_id` TEXT CHARACTER SET utf8 NOT NULL, `id` TEXT CHARACTER SET utf8 NOT NULL, `data` MEDIUMBLOB NOT NULL, `posted` INT UNSIGNED NOT NULL, INDEX `feed_id` (`feed_id`(125)))');
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if ($query === false)
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{
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trigger_error("Can't create " . $this->options['extras']['prefix'] . "items table, check permissions", E_USER_WARNING);
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$this->mysql = null;
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return;
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}
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}
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}
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/**
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* Save data to the cache
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*
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* @param array|SimplePie $data Data to store in the cache. If passed a SimplePie object, only cache the $data property
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* @return bool Successfulness
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*/
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public function save($data)
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{
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if ($this->mysql === null)
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{
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return false;
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}
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$query = $this->mysql->prepare('DELETE i, cd FROM `' . $this->options['extras']['prefix'] . 'cache_data` cd, ' .
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'`' . $this->options['extras']['prefix'] . 'items` i ' .
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'WHERE cd.id = i.feed_id ' .
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'AND cd.mtime < (unix_timestamp() - :purge_time)');
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$query->bindValue(':purge_time', $this->options['extras']['cache_purge_time']);
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if (!$query->execute())
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{
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return false;
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}
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if ($data instanceof SimplePie)
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{
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$data = clone $data;
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$prepared = self::prepare_simplepie_object_for_cache($data);
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$query = $this->mysql->prepare('SELECT COUNT(*) FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :feed');
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$query->bindValue(':feed', $this->id);
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if ($query->execute())
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{
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if ($query->fetchColumn() > 0)
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{
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$items = count($prepared[1]);
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if ($items)
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{
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$sql = 'UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `items` = :items, `data` = :data, `mtime` = :time WHERE `id` = :feed';
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$query = $this->mysql->prepare($sql);
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$query->bindValue(':items', $items);
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}
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else
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{
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$sql = 'UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `data` = :data, `mtime` = :time WHERE `id` = :feed';
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$query = $this->mysql->prepare($sql);
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}
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$query->bindValue(':data', $prepared[0]);
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$query->bindValue(':time', time());
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$query->bindValue(':feed', $this->id);
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if (!$query->execute())
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{
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return false;
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}
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}
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else
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{
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$query = $this->mysql->prepare('INSERT INTO `' . $this->options['extras']['prefix'] . 'cache_data` (`id`, `items`, `data`, `mtime`) VALUES(:feed, :count, :data, :time)');
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$query->bindValue(':feed', $this->id);
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$query->bindValue(':count', count($prepared[1]));
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$query->bindValue(':data', $prepared[0]);
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$query->bindValue(':time', time());
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if (!$query->execute())
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{
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return false;
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}
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}
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$ids = array_keys($prepared[1]);
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if (!empty($ids))
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{
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foreach ($ids as $id)
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{
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$database_ids[] = $this->mysql->quote($id);
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}
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$query = $this->mysql->prepare('SELECT `id` FROM `' . $this->options['extras']['prefix'] . 'items` WHERE `id` = ' . implode(' OR `id` = ', $database_ids) . ' AND `feed_id` = :feed');
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$query->bindValue(':feed', $this->id);
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if ($query->execute())
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{
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$existing_ids = array();
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while ($row = $query->fetchColumn())
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{
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$existing_ids[] = $row;
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}
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$new_ids = array_diff($ids, $existing_ids);
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foreach ($new_ids as $new_id)
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{
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if (!($date = $prepared[1][$new_id]->get_date('U')))
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{
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$date = time();
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}
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$query = $this->mysql->prepare('INSERT INTO `' . $this->options['extras']['prefix'] . 'items` (`feed_id`, `id`, `data`, `posted`) VALUES(:feed, :id, :data, :date)');
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$query->bindValue(':feed', $this->id);
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$query->bindValue(':id', $new_id);
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$query->bindValue(':data', serialize($prepared[1][$new_id]->data));
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$query->bindValue(':date', $date);
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if (!$query->execute())
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{
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return false;
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}
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}
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return true;
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}
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}
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else
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{
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return true;
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}
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}
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}
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else
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{
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$query = $this->mysql->prepare('SELECT `id` FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :feed');
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$query->bindValue(':feed', $this->id);
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if ($query->execute())
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{
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if ($query->rowCount() > 0)
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{
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$query = $this->mysql->prepare('UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `items` = 0, `data` = :data, `mtime` = :time WHERE `id` = :feed');
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$query->bindValue(':data', serialize($data));
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$query->bindValue(':time', time());
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$query->bindValue(':feed', $this->id);
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if ($this->execute())
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{
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return true;
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}
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}
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else
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{
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$query = $this->mysql->prepare('INSERT INTO `' . $this->options['extras']['prefix'] . 'cache_data` (`id`, `items`, `data`, `mtime`) VALUES(:id, 0, :data, :time)');
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$query->bindValue(':id', $this->id);
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$query->bindValue(':data', serialize($data));
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$query->bindValue(':time', time());
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if ($query->execute())
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{
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return true;
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}
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}
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}
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}
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return false;
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}
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/**
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* Retrieve the data saved to the cache
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*
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* @return array Data for SimplePie::$data
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*/
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public function load()
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{
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if ($this->mysql === null)
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{
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return false;
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}
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$query = $this->mysql->prepare('SELECT `items`, `data` FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :id');
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$query->bindValue(':id', $this->id);
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if ($query->execute() && ($row = $query->fetch()))
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{
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$data = unserialize($row[1]);
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if (isset($this->options['items'][0]))
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{
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$items = (int) $this->options['items'][0];
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}
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else
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{
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$items = (int) $row[0];
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}
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if ($items !== 0)
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{
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if (isset($data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0]))
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{
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$feed =& $data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0];
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}
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elseif (isset($data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0]))
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{
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$feed =& $data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0];
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}
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elseif (isset($data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]))
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{
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$feed =& $data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0];
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}
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elseif (isset($data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0]))
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{
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$feed =& $data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0];
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}
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else
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{
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$feed = null;
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}
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if ($feed !== null)
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{
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$sql = 'SELECT `data` FROM `' . $this->options['extras']['prefix'] . 'items` WHERE `feed_id` = :feed ORDER BY `posted` DESC';
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if ($items > 0)
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{
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$sql .= ' LIMIT ' . $items;
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}
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$query = $this->mysql->prepare($sql);
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$query->bindValue(':feed', $this->id);
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if ($query->execute())
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{
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while ($row = $query->fetchColumn())
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{
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$feed['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['entry'][] = unserialize($row);
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}
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}
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else
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{
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return false;
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}
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}
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}
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return $data;
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}
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return false;
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}
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/**
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* Retrieve the last modified time for the cache
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*
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* @return int Timestamp
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*/
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public function mtime()
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{
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if ($this->mysql === null)
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{
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return false;
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}
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$query = $this->mysql->prepare('SELECT `mtime` FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :id');
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$query->bindValue(':id', $this->id);
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if ($query->execute() && ($time = $query->fetchColumn()))
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{
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return $time;
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}
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else
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{
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return false;
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}
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}
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/**
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* Set the last modified time to the current time
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*
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* @return bool Success status
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*/
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public function touch()
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{
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if ($this->mysql === null)
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{
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return false;
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}
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$query = $this->mysql->prepare('UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `mtime` = :time WHERE `id` = :id');
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$query->bindValue(':time', time());
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$query->bindValue(':id', $this->id);
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if ($query->execute() && $query->rowCount() > 0)
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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/**
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* Remove the cache
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*
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* @return bool Success status
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*/
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public function unlink()
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{
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if ($this->mysql === null)
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{
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return false;
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}
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$query = $this->mysql->prepare('DELETE FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :id');
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$query->bindValue(':id', $this->id);
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$query2 = $this->mysql->prepare('DELETE FROM `' . $this->options['extras']['prefix'] . 'items` WHERE `feed_id` = :id');
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$query2->bindValue(':id', $this->id);
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if ($query->execute() && $query2->execute())
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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}
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