1 <?php

     2 

     3 /**

     4  * SimplePie

     5  *

     6  * A PHP-Based RSS and Atom Feed Framework.

     7  * Takes the hard work out of managing a complete RSS/Atom solution.

     8  *

     9  * Copyright (c) 2004-2022, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors

    10  * All rights reserved.

    11  *

    12  * Redistribution and use in source and binary forms, with or without modification, are

    13  * permitted provided that the following conditions are met:

    14  *

    15  * 	* Redistributions of source code must retain the above copyright notice, this list of

    16  * 	  conditions and the following disclaimer.

    17  *

    18  * 	* Redistributions in binary form must reproduce the above copyright notice, this list

    19  * 	  of conditions and the following disclaimer in the documentation and/or other materials

    20  * 	  provided with the distribution.

    21  *

    22  * 	* Neither the name of the SimplePie Team nor the names of its contributors may be used

    23  * 	  to endorse or promote products derived from this software without specific prior

    24  * 	  written permission.

    25  *

    26  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS

    27  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY

    28  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS

    29  * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

    31  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

    32  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

    33  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

    34  * POSSIBILITY OF SUCH DAMAGE.

    35  *

    36  * @package SimplePie

    37  * @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue

    38  * @author Ryan Parman

    39  * @author Sam 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 namespace SimplePie\Cache;

    46 

    47 /**

    48  * Caches data to a MySQL database

    49  *

    50  * Registered for URLs with the "mysql" protocol

    51  *

    52  * For example, `mysql://root:password@localhost:3306/mydb?prefix=sp_` will

    53  * connect to the `mydb` database on `localhost` on port 3306, with the user

    54  * `root` and the password `password`. All tables will be prefixed with `sp_`

    55  *

    56  * @package SimplePie

    57  * @subpackage Caching

    58  * @deprecated since SimplePie 1.8.0, use implementation of "Psr\SimpleCache\CacheInterface" instead

    59  */

    60 class MySQL extends DB

    61 {

    62     /**

    63      * PDO instance

    64      *

    65      * @var \PDO

    66      */

    67     protected $mysql;

    68 

    69     /**

    70      * Options

    71      *

    72      * @var array

    73      */

    74     protected $options;

    75 

    76     /**

    77      * Cache ID

    78      *

    79      * @var string

    80      */

    81     protected $id;

    82 

    83     /**

    84      * Create a new cache object

    85      *

    86      * @param string $location Location string (from SimplePie::$cache_location)

    87      * @param string $name Unique ID for the cache

    88      * @param Base::TYPE_FEED|Base::TYPE_IMAGE $type Either TYPE_FEED for SimplePie data, or TYPE_IMAGE for image data

    89      */

    90     public function __construct($location, $name, $type)

    91     {

    92         $this->options = [

    93             'user' => null,

    94             'pass' => null,

    95             'host' => '127.0.0.1',

    96             'port' => '3306',

    97             'path' => '',

    98             'extras' => [

    99                 'prefix' => '',

   100                 'cache_purge_time' => 2592000

   101             ],

   102         ];

   103 

   104         $this->options = array_replace_recursive($this->options, \SimplePie\Cache::parse_URL($location));

   105 

   106         // Path is prefixed with a "/"

   107         $this->options['dbname'] = substr($this->options['path'], 1);

   108 

   109         try {

   110             $this->mysql = new \PDO("mysql:dbname={$this->options['dbname']};host={$this->options['host']};port={$this->options['port']}", $this->options['user'], $this->options['pass'], [\PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8']);

   111         } catch (\PDOException $e) {

   112             $this->mysql = null;

   113             return;

   114         }

   115 

   116         $this->id = $name . $type;

   117 

   118         if (!$query = $this->mysql->query('SHOW TABLES')) {

   119             $this->mysql = null;

   120             return;

   121         }

   122 

   123         $db = [];

   124         while ($row = $query->fetchColumn()) {

   125             $db[] = $row;

   126         }

   127 

   128         if (!in_array($this->options['extras']['prefix'] . 'cache_data', $db)) {

   129             $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)))');

   130             if ($query === false) {

   131                 trigger_error("Can't create " . $this->options['extras']['prefix'] . "cache_data table, check permissions", \E_USER_WARNING);

   132                 $this->mysql = null;

   133                 return;

   134             }

   135         }

   136 

   137         if (!in_array($this->options['extras']['prefix'] . 'items', $db)) {

   138             $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)))');

   139             if ($query === false) {

   140                 trigger_error("Can't create " . $this->options['extras']['prefix'] . "items table, check permissions", \E_USER_WARNING);

   141                 $this->mysql = null;

   142                 return;

   143             }

   144         }

   145     }

   146 

   147     /**

   148      * Save data to the cache

   149      *

   150      * @param array|\SimplePie\SimplePie $data Data to store in the cache. If passed a SimplePie object, only cache the $data property

   151      * @return bool Successfulness

   152      */

   153     public function save($data)

   154     {

   155         if ($this->mysql === null) {

   156             return false;

   157         }

   158 

   159         $query = $this->mysql->prepare('DELETE i, cd FROM `' . $this->options['extras']['prefix'] . 'cache_data` cd, ' .

   160             '`' . $this->options['extras']['prefix'] . 'items` i ' .

   161             'WHERE cd.id = i.feed_id ' .

   162             'AND cd.mtime < (unix_timestamp() - :purge_time)');

   163         $query->bindValue(':purge_time', $this->options['extras']['cache_purge_time']);

   164 

   165         if (!$query->execute()) {

   166             return false;

   167         }

   168 

   169         if ($data instanceof \SimplePie\SimplePie) {

   170             $data = clone $data;

   171 

   172             $prepared = self::prepare_simplepie_object_for_cache($data);

   173 

   174             $query = $this->mysql->prepare('SELECT COUNT(*) FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :feed');

   175             $query->bindValue(':feed', $this->id);

   176             if ($query->execute()) {

   177                 if ($query->fetchColumn() > 0) {

   178                     $items = count($prepared[1]);

   179                     if ($items) {

   180                         $sql = 'UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `items` = :items, `data` = :data, `mtime` = :time WHERE `id` = :feed';

   181                         $query = $this->mysql->prepare($sql);

   182                         $query->bindValue(':items', $items);

   183                     } else {

   184                         $sql = 'UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `data` = :data, `mtime` = :time WHERE `id` = :feed';

   185                         $query = $this->mysql->prepare($sql);

   186                     }

   187 

   188                     $query->bindValue(':data', $prepared[0]);

   189                     $query->bindValue(':time', time());

   190                     $query->bindValue(':feed', $this->id);

   191                     if (!$query->execute()) {

   192                         return false;

   193                     }

   194                 } else {

   195                     $query = $this->mysql->prepare('INSERT INTO `' . $this->options['extras']['prefix'] . 'cache_data` (`id`, `items`, `data`, `mtime`) VALUES(:feed, :count, :data, :time)');

   196                     $query->bindValue(':feed', $this->id);

   197                     $query->bindValue(':count', count($prepared[1]));

   198                     $query->bindValue(':data', $prepared[0]);

   199                     $query->bindValue(':time', time());

   200                     if (!$query->execute()) {

   201                         return false;

   202                     }

   203                 }

   204 

   205                 $ids = array_keys($prepared[1]);

   206                 if (!empty($ids)) {

   207                     foreach ($ids as $id) {

   208                         $database_ids[] = $this->mysql->quote($id);

   209                     }

   210 

   211                     $query = $this->mysql->prepare('SELECT `id` FROM `' . $this->options['extras']['prefix'] . 'items` WHERE `id` = ' . implode(' OR `id` = ', $database_ids) . ' AND `feed_id` = :feed');

   212                     $query->bindValue(':feed', $this->id);

   213 

   214                     if ($query->execute()) {

   215                         $existing_ids = [];

   216                         while ($row = $query->fetchColumn()) {

   217                             $existing_ids[] = $row;

   218                         }

   219 

   220                         $new_ids = array_diff($ids, $existing_ids);

   221 

   222                         foreach ($new_ids as $new_id) {

   223                             if (!($date = $prepared[1][$new_id]->get_date('U'))) {

   224                                 $date = time();

   225                             }

   226 

   227                             $query = $this->mysql->prepare('INSERT INTO `' . $this->options['extras']['prefix'] . 'items` (`feed_id`, `id`, `data`, `posted`) VALUES(:feed, :id, :data, :date)');

   228                             $query->bindValue(':feed', $this->id);

   229                             $query->bindValue(':id', $new_id);

   230                             $query->bindValue(':data', serialize($prepared[1][$new_id]->data));

   231                             $query->bindValue(':date', $date);

   232                             if (!$query->execute()) {

   233                                 return false;

   234                             }

   235                         }

   236                         return true;

   237                     }

   238                 } else {

   239                     return true;

   240                 }

   241             }

   242         } else {

   243             $query = $this->mysql->prepare('SELECT `id` FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :feed');

   244             $query->bindValue(':feed', $this->id);

   245             if ($query->execute()) {

   246                 if ($query->rowCount() > 0) {

   247                     $query = $this->mysql->prepare('UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `items` = 0, `data` = :data, `mtime` = :time WHERE `id` = :feed');

   248                     $query->bindValue(':data', serialize($data));

   249                     $query->bindValue(':time', time());

   250                     $query->bindValue(':feed', $this->id);

   251                     if ($query->execute()) {

   252                         return true;

   253                     }

   254                 } else {

   255                     $query = $this->mysql->prepare('INSERT INTO `' . $this->options['extras']['prefix'] . 'cache_data` (`id`, `items`, `data`, `mtime`) VALUES(:id, 0, :data, :time)');

   256                     $query->bindValue(':id', $this->id);

   257                     $query->bindValue(':data', serialize($data));

   258                     $query->bindValue(':time', time());

   259                     if ($query->execute()) {

   260                         return true;

   261                     }

   262                 }

   263             }

   264         }

   265         return false;

   266     }

   267 

   268     /**

   269      * Retrieve the data saved to the cache

   270      *

   271      * @return array Data for SimplePie::$data

   272      */

   273     public function load()

   274     {

   275         if ($this->mysql === null) {

   276             return false;

   277         }

   278 

   279         $query = $this->mysql->prepare('SELECT `items`, `data` FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :id');

   280         $query->bindValue(':id', $this->id);

   281         if ($query->execute() && ($row = $query->fetch())) {

   282             $data = unserialize($row[1]);

   283 

   284             if (isset($this->options['items'][0])) {

   285                 $items = (int) $this->options['items'][0];

   286             } else {

   287                 $items = (int) $row[0];

   288             }

   289 

   290             if ($items !== 0) {

   291                 if (isset($data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['feed'][0])) {

   292                     $feed = &$data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['feed'][0];

   293                 } elseif (isset($data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['feed'][0])) {

   294                     $feed = &$data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['feed'][0];

   295                 } elseif (isset($data['child'][\SimplePie\SimplePie::NAMESPACE_RDF]['RDF'][0])) {

   296                     $feed = &$data['child'][\SimplePie\SimplePie::NAMESPACE_RDF]['RDF'][0];

   297                 } elseif (isset($data['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['rss'][0])) {

   298                     $feed = &$data['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['rss'][0];

   299                 } else {

   300                     $feed = null;

   301                 }

   302 

   303                 if ($feed !== null) {

   304                     $sql = 'SELECT `data` FROM `' . $this->options['extras']['prefix'] . 'items` WHERE `feed_id` = :feed ORDER BY `posted` DESC';

   305                     if ($items > 0) {

   306                         $sql .= ' LIMIT ' . $items;

   307                     }

   308 

   309                     $query = $this->mysql->prepare($sql);

   310                     $query->bindValue(':feed', $this->id);

   311                     if ($query->execute()) {

   312                         while ($row = $query->fetchColumn()) {

   313                             $feed['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['entry'][] = unserialize($row);

   314                         }

   315                     } else {

   316                         return false;

   317                     }

   318                 }

   319             }

   320             return $data;

   321         }

   322         return false;

   323     }

   324 

   325     /**

   326      * Retrieve the last modified time for the cache

   327      *

   328      * @return int Timestamp

   329      */

   330     public function mtime()

   331     {

   332         if ($this->mysql === null) {

   333             return false;

   334         }

   335 

   336         $query = $this->mysql->prepare('SELECT `mtime` FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :id');

   337         $query->bindValue(':id', $this->id);

   338         if ($query->execute() && ($time = $query->fetchColumn())) {

   339             return $time;

   340         }

   341 

   342         return false;

   343     }

   344 

   345     /**

   346      * Set the last modified time to the current time

   347      *

   348      * @return bool Success status

   349      */

   350     public function touch()

   351     {

   352         if ($this->mysql === null) {

   353             return false;

   354         }

   355 

   356         $query = $this->mysql->prepare('UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `mtime` = :time WHERE `id` = :id');

   357         $query->bindValue(':time', time());

   358         $query->bindValue(':id', $this->id);

   359 

   360         return $query->execute() && $query->rowCount() > 0;

   361     }

   362 

   363     /**

   364      * Remove the cache

   365      *

   366      * @return bool Success status

   367      */

   368     public function unlink()

   369     {

   370         if ($this->mysql === null) {

   371             return false;

   372         }

   373 

   374         $query = $this->mysql->prepare('DELETE FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :id');

   375         $query->bindValue(':id', $this->id);

   376         $query2 = $this->mysql->prepare('DELETE FROM `' . $this->options['extras']['prefix'] . 'items` WHERE `feed_id` = :id');

   377         $query2->bindValue(':id', $this->id);

   378 

   379         return $query->execute() && $query2->execute();

   380     }

   381 }

   382 

   383 class_alias('SimplePie\Cache\MySQL', 'SimplePie_Cache_MySQL');