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   1  <?php
   2  
   3  declare(strict_types=1);
   4  /**
   5   * SimplePie
   6   *
   7   * A PHP-Based RSS and Atom Feed Framework.
   8   * Takes the hard work out of managing a complete RSS/Atom solution.
   9   *
  10   * Copyright (c) 2004-2022, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors
  11   * All rights reserved.
  12   *
  13   * Redistribution and use in source and binary forms, with or without modification, are
  14   * permitted provided that the following conditions are met:
  15   *
  16   * 	 * Redistributions of source code must retain the above copyright notice, this list of
  17   * 	   conditions and the following disclaimer.
  18   *
  19   * 	 * Redistributions in binary form must reproduce the above copyright notice, this list
  20   * 	   of conditions and the following disclaimer in the documentation and/or other materials
  21   * 	   provided with the distribution.
  22   *
  23   * 	 * Neither the name of the SimplePie Team nor the names of its contributors may be used
  24   * 	   to endorse or promote products derived from this software without specific prior
  25   * 	   written permission.
  26   *
  27   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
  28   * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  29   * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
  30   * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  31   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  32   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  33   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  34   * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35   * POSSIBILITY OF SUCH DAMAGE.
  36   *
  37   * @package SimplePie
  38   * @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue
  39   * @author Ryan Parman
  40   * @author Sam Sneddon
  41   * @author Ryan McCue
  42   * @link http://simplepie.org/ SimplePie
  43   * @license http://www.opensource.org/licenses/bsd-license.php BSD License
  44   */
  45  
  46  namespace SimplePie\Cache;
  47  
  48  /**
  49   * Caches data to a MySQL database
  50   *
  51   * Registered for URLs with the "mysql" protocol
  52   *
  53   * For example, `mysql://root:password@localhost:3306/mydb?prefix=sp_` will
  54   * connect to the `mydb` database on `localhost` on port 3306, with the user
  55   * `root` and the password `password`. All tables will be prefixed with `sp_`
  56   *
  57   * @package SimplePie
  58   * @subpackage Caching
  59   * @deprecated since SimplePie 1.8.0, use implementation of "Psr\SimpleCache\CacheInterface" instead
  60   */
  61  class MySQL extends DB
  62  {
  63      /**
  64       * PDO instance
  65       *
  66       * @var \PDO
  67       */
  68      protected $mysql;
  69  
  70      /**
  71       * Options
  72       *
  73       * @var array
  74       */
  75      protected $options;
  76  
  77      /**
  78       * Cache ID
  79       *
  80       * @var string
  81       */
  82      protected $id;
  83  
  84      /**
  85       * Create a new cache object
  86       *
  87       * @param string $location Location string (from SimplePie::$cache_location)
  88       * @param string $name Unique ID for the cache
  89       * @param Base::TYPE_FEED|Base::TYPE_IMAGE $type Either TYPE_FEED for SimplePie data, or TYPE_IMAGE for image data
  90       */
  91      public function __construct($location, $name, $type)
  92      {
  93          $this->options = [
  94              'user' => null,
  95              'pass' => null,
  96              'host' => '127.0.0.1',
  97              'port' => '3306',
  98              'path' => '',
  99              'extras' => [
 100                  'prefix' => '',
 101                  'cache_purge_time' => 2592000
 102              ],
 103          ];
 104  
 105          $this->options = array_replace_recursive($this->options, \SimplePie\Cache::parse_URL($location));
 106  
 107          // Path is prefixed with a "/"
 108          $this->options['dbname'] = substr($this->options['path'], 1);
 109  
 110          try {
 111              $this->mysql = new \PDO("mysql:dbname={$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']);
 112          } catch (\PDOException $e) {
 113              $this->mysql = null;
 114              return;
 115          }
 116  
 117          $this->id = $name . $type;
 118  
 119          if (!$query = $this->mysql->query('SHOW TABLES')) {
 120              $this->mysql = null;
 121              return;
 122          }
 123  
 124          $db = [];
 125          while ($row = $query->fetchColumn()) {
 126              $db[] = $row;
 127          }
 128  
 129          if (!in_array($this->options['extras']['prefix'] . 'cache_data', $db)) {
 130              $query = $this->mysql->exec('CREATE TABLE `' . $this->options['extras']['prefix'] . 'cache_data` (`id` TEXT CHARACTER SET utf8 NOT NULL, `items` SMALLINT NOT NULL DEFAULT 0, `data` BLOB NOT NULL, `mtime` INT UNSIGNED NOT NULL, UNIQUE (`id`(125)))');
 131              if ($query === false) {
 132                  trigger_error("Can't create " . $this->options['extras']['prefix'] . "cache_data table, check permissions", \E_USER_WARNING);
 133                  $this->mysql = null;
 134                  return;
 135              }
 136          }
 137  
 138          if (!in_array($this->options['extras']['prefix'] . 'items', $db)) {
 139              $query = $this->mysql->exec('CREATE TABLE `' . $this->options['extras']['prefix'] . 'items` (`feed_id` TEXT CHARACTER SET utf8 NOT NULL, `id` TEXT CHARACTER SET utf8 NOT NULL, `data` MEDIUMBLOB NOT NULL, `posted` INT UNSIGNED NOT NULL, INDEX `feed_id` (`feed_id`(125)))');
 140              if ($query === false) {
 141                  trigger_error("Can't create " . $this->options['extras']['prefix'] . "items table, check permissions", \E_USER_WARNING);
 142                  $this->mysql = null;
 143                  return;
 144              }
 145          }
 146      }
 147  
 148      /**
 149       * Save data to the cache
 150       *
 151       * @param array|\SimplePie\SimplePie $data Data to store in the cache. If passed a SimplePie object, only cache the $data property
 152       * @return bool Successfulness
 153       */
 154      public function save($data)
 155      {
 156          if ($this->mysql === null) {
 157              return false;
 158          }
 159  
 160          $query = $this->mysql->prepare('DELETE i, cd FROM `' . $this->options['extras']['prefix'] . 'cache_data` cd, ' .
 161              '`' . $this->options['extras']['prefix'] . 'items` i ' .
 162              'WHERE cd.id = i.feed_id ' .
 163              'AND cd.mtime < (unix_timestamp() - :purge_time)');
 164          $query->bindValue(':purge_time', $this->options['extras']['cache_purge_time']);
 165  
 166          if (!$query->execute()) {
 167              return false;
 168          }
 169  
 170          if ($data instanceof \SimplePie\SimplePie) {
 171              $data = clone $data;
 172  
 173              $prepared = self::prepare_simplepie_object_for_cache($data);
 174  
 175              $query = $this->mysql->prepare('SELECT COUNT(*) FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :feed');
 176              $query->bindValue(':feed', $this->id);
 177              if ($query->execute()) {
 178                  if ($query->fetchColumn() > 0) {
 179                      $items = count($prepared[1]);
 180                      if ($items) {
 181                          $sql = 'UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `items` = :items, `data` = :data, `mtime` = :time WHERE `id` = :feed';
 182                          $query = $this->mysql->prepare($sql);
 183                          $query->bindValue(':items', $items);
 184                      } else {
 185                          $sql = 'UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `data` = :data, `mtime` = :time WHERE `id` = :feed';
 186                          $query = $this->mysql->prepare($sql);
 187                      }
 188  
 189                      $query->bindValue(':data', $prepared[0]);
 190                      $query->bindValue(':time', time());
 191                      $query->bindValue(':feed', $this->id);
 192                      if (!$query->execute()) {
 193                          return false;
 194                      }
 195                  } else {
 196                      $query = $this->mysql->prepare('INSERT INTO `' . $this->options['extras']['prefix'] . 'cache_data` (`id`, `items`, `data`, `mtime`) VALUES(:feed, :count, :data, :time)');
 197                      $query->bindValue(':feed', $this->id);
 198                      $query->bindValue(':count', count($prepared[1]));
 199                      $query->bindValue(':data', $prepared[0]);
 200                      $query->bindValue(':time', time());
 201                      if (!$query->execute()) {
 202                          return false;
 203                      }
 204                  }
 205  
 206                  $ids = array_keys($prepared[1]);
 207                  if (!empty($ids)) {
 208                      foreach ($ids as $id) {
 209                          $database_ids[] = $this->mysql->quote($id);
 210                      }
 211  
 212                      $query = $this->mysql->prepare('SELECT `id` FROM `' . $this->options['extras']['prefix'] . 'items` WHERE `id` = ' . implode(' OR `id` = ', $database_ids) . ' AND `feed_id` = :feed');
 213                      $query->bindValue(':feed', $this->id);
 214  
 215                      if ($query->execute()) {
 216                          $existing_ids = [];
 217                          while ($row = $query->fetchColumn()) {
 218                              $existing_ids[] = $row;
 219                          }
 220  
 221                          $new_ids = array_diff($ids, $existing_ids);
 222  
 223                          foreach ($new_ids as $new_id) {
 224                              if (!($date = $prepared[1][$new_id]->get_date('U'))) {
 225                                  $date = time();
 226                              }
 227  
 228                              $query = $this->mysql->prepare('INSERT INTO `' . $this->options['extras']['prefix'] . 'items` (`feed_id`, `id`, `data`, `posted`) VALUES(:feed, :id, :data, :date)');
 229                              $query->bindValue(':feed', $this->id);
 230                              $query->bindValue(':id', $new_id);
 231                              $query->bindValue(':data', serialize($prepared[1][$new_id]->data));
 232                              $query->bindValue(':date', $date);
 233                              if (!$query->execute()) {
 234                                  return false;
 235                              }
 236                          }
 237                          return true;
 238                      }
 239                  } else {
 240                      return true;
 241                  }
 242              }
 243          } else {
 244              $query = $this->mysql->prepare('SELECT `id` FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :feed');
 245              $query->bindValue(':feed', $this->id);
 246              if ($query->execute()) {
 247                  if ($query->rowCount() > 0) {
 248                      $query = $this->mysql->prepare('UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `items` = 0, `data` = :data, `mtime` = :time WHERE `id` = :feed');
 249                      $query->bindValue(':data', serialize($data));
 250                      $query->bindValue(':time', time());
 251                      $query->bindValue(':feed', $this->id);
 252                      if ($query->execute()) {
 253                          return true;
 254                      }
 255                  } else {
 256                      $query = $this->mysql->prepare('INSERT INTO `' . $this->options['extras']['prefix'] . 'cache_data` (`id`, `items`, `data`, `mtime`) VALUES(:id, 0, :data, :time)');
 257                      $query->bindValue(':id', $this->id);
 258                      $query->bindValue(':data', serialize($data));
 259                      $query->bindValue(':time', time());
 260                      if ($query->execute()) {
 261                          return true;
 262                      }
 263                  }
 264              }
 265          }
 266          return false;
 267      }
 268  
 269      /**
 270       * Retrieve the data saved to the cache
 271       *
 272       * @return array Data for SimplePie::$data
 273       */
 274      public function load()
 275      {
 276          if ($this->mysql === null) {
 277              return false;
 278          }
 279  
 280          $query = $this->mysql->prepare('SELECT `items`, `data` FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :id');
 281          $query->bindValue(':id', $this->id);
 282          if ($query->execute() && ($row = $query->fetch())) {
 283              $data = unserialize($row[1]);
 284  
 285              if (isset($this->options['items'][0])) {
 286                  $items = (int) $this->options['items'][0];
 287              } else {
 288                  $items = (int) $row[0];
 289              }
 290  
 291              if ($items !== 0) {
 292                  if (isset($data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['feed'][0])) {
 293                      $feed =& $data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['feed'][0];
 294                  } elseif (isset($data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['feed'][0])) {
 295                      $feed =& $data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['feed'][0];
 296                  } elseif (isset($data['child'][\SimplePie\SimplePie::NAMESPACE_RDF]['RDF'][0])) {
 297                      $feed =& $data['child'][\SimplePie\SimplePie::NAMESPACE_RDF]['RDF'][0];
 298                  } elseif (isset($data['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['rss'][0])) {
 299                      $feed =& $data['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['rss'][0];
 300                  } else {
 301                      $feed = null;
 302                  }
 303  
 304                  if ($feed !== null) {
 305                      $sql = 'SELECT `data` FROM `' . $this->options['extras']['prefix'] . 'items` WHERE `feed_id` = :feed ORDER BY `posted` DESC';
 306                      if ($items > 0) {
 307                          $sql .= ' LIMIT ' . $items;
 308                      }
 309  
 310                      $query = $this->mysql->prepare($sql);
 311                      $query->bindValue(':feed', $this->id);
 312                      if ($query->execute()) {
 313                          while ($row = $query->fetchColumn()) {
 314                              $feed['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['entry'][] = unserialize($row);
 315                          }
 316                      } else {
 317                          return false;
 318                      }
 319                  }
 320              }
 321              return $data;
 322          }
 323          return false;
 324      }
 325  
 326      /**
 327       * Retrieve the last modified time for the cache
 328       *
 329       * @return int Timestamp
 330       */
 331      public function mtime()
 332      {
 333          if ($this->mysql === null) {
 334              return false;
 335          }
 336  
 337          $query = $this->mysql->prepare('SELECT `mtime` FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :id');
 338          $query->bindValue(':id', $this->id);
 339          if ($query->execute() && ($time = $query->fetchColumn())) {
 340              return $time;
 341          }
 342  
 343          return false;
 344      }
 345  
 346      /**
 347       * Set the last modified time to the current time
 348       *
 349       * @return bool Success status
 350       */
 351      public function touch()
 352      {
 353          if ($this->mysql === null) {
 354              return false;
 355          }
 356  
 357          $query = $this->mysql->prepare('UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `mtime` = :time WHERE `id` = :id');
 358          $query->bindValue(':time', time());
 359          $query->bindValue(':id', $this->id);
 360  
 361          return $query->execute() && $query->rowCount() > 0;
 362      }
 363  
 364      /**
 365       * Remove the cache
 366       *
 367       * @return bool Success status
 368       */
 369      public function unlink()
 370      {
 371          if ($this->mysql === null) {
 372              return false;
 373          }
 374  
 375          $query = $this->mysql->prepare('DELETE FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :id');
 376          $query->bindValue(':id', $this->id);
 377          $query2 = $this->mysql->prepare('DELETE FROM `' . $this->options['extras']['prefix'] . 'items` WHERE `feed_id` = :id');
 378          $query2->bindValue(':id', $this->id);
 379  
 380          return $query->execute() && $query2->execute();
 381      }
 382  }
 383  
 384  class_alias('SimplePie\Cache\MySQL', 'SimplePie_Cache_MySQL');