angelovcom.net

MySQL.php (12840B)

---

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