Subversion-Projekte lars-tiefland.php_share

<?php

/*

 * This file is part of the symfony package.

 * (c) 2004-2006 Fabien Potencier <fabien.potencier@symfony-project.com>

 * (c) 2004-2006 Sean Kerr <sean@code-box.org>

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

/**

 * Provides support for session storage using a PostgreSQL brand database.

 *

 * <b>parameters:</b> see sfDatabaseSessionStorage

 *

 * @package    symfony

 * @subpackage storage

 * @author     Fabien Potencier <fabien.potencier@symfony-project.com>

 * @author     Sean Kerr <sean@code-box.org>

 * @version    SVN: $Id: sfPostgreSQLSessionStorage.class.php 23810 2009-11-12 11:07:44Z Kris.Wallsmith $

 */

class sfPostgreSQLSessionStorage extends sfDatabaseSessionStorage

{

  /**

   * Destroys a session.

   *

   * @param  string $id  A session ID

   *

   * @return bool true, if the session was destroyed, otherwise an exception is thrown

   *

   * @throws <b>sfDatabaseException</b> If the session cannot be destroyed

   */

  public function sessionDestroy($id)

  {

    // get table/column

    $db_table  = $this->options['db_table'];

    $db_id_col = $this->options['db_id_col'];

    // cleanup the session id, just in case

    $id = addslashes($id);

    // delete the record associated with this id

    $sql = 'DELETE FROM '.$db_table.' WHERE '.$db_id_col.' = \''.$id.'\'';

    if (@pg_query($this->db, $sql))

    {

      return true;

    }

    // failed to destroy session

    throw new sfDatabaseException(sprintf('sfPostgreSQLSessionStorage cannot destroy session id "%s".', $id));

  }

  /**

   * Cleans up old sessions.

   *

   * @param  int $lifetime  The lifetime of a session

   *

   * @return bool true, if old sessions have been cleaned, otherwise an exception is thrown

   *

   * @throws <b>sfDatabaseException</b> If any old sessions cannot be cleaned

   */

  public function sessionGC($lifetime)

  {

    // get table/column

    $db_table    = $this->options['db_table'];

    $db_time_col = $this->options['db_time_col'];

    // delete the record associated with this id

    $sql = 'DELETE FROM '.$db_table.' WHERE '.$db_time_col.' < '.(time() - $lifetime);

    if (!@pg_query($this->db, $sql))

    {

      throw new sfDatabaseException('sfPostgreSQLSessionStorage cannot delete old sessions.');

    }

    return true;

  }

  /**

   * Reads a session.

   *

   * @param  string $id  A session ID

   *

   * @return string      The session data if the session was read or created, otherwise an exception is thrown

   *

   * @throws <b>sfDatabaseException</b> If the session cannot be read

   */

  public function sessionRead($id)

  {

    // get table/column

    $db_table    = $this->options['db_table'];

    $db_data_col = $this->options['db_data_col'];

    $db_id_col   = $this->options['db_id_col'];

    $db_time_col = $this->options['db_time_col'];

    // cleanup the session id, just in case

    $id = addslashes($id);

    // delete the record associated with this id

    $sql = 'SELECT '.$db_data_col.' FROM '.$db_table.' WHERE '.$db_id_col.' = \''.$id.'\'';

    $result = @pg_query($this->db, $sql);

    if ($result != false && @pg_num_rows($result) == 1)

    {

      // found the session

      $data = pg_fetch_row($result);

      return $data[0];

    }

    else

    {

      // session does not exist, create it

      $sql = 'INSERT INTO '.$db_table.' ('.$db_id_col.', '.$db_data_col.', '.$db_time_col.') VALUES (\''.$id.'\', \'\', '.time().')';

      if (@pg_query($this->db, $sql))

      {

        return '';

      }

      // can't create record

      throw new sfDatabaseException(sprintf('sfPostgreSQLSessionStorage cannot create new record for id "%s".', $id));

    }

  }

  /**

   * Writes session data.

   *

   * @param  string $id    A session ID

   * @param  string $data  A serialized chunk of session data

   *

   * @return bool true, if the session was written, otherwise an exception is thrown

   *

   * @throws <b>sfDatabaseException</b> If the session data cannot be written

   */

  public function sessionWrite($id, $data)

  {

    // get table/column

    $db_table    = $this->options['db_table'];

    $db_data_col = $this->options['db_data_col'];

    $db_id_col   = $this->options['db_id_col'];

    $db_time_col = $this->options['db_time_col'];

    // cleanup the session id and data, just in case

    $id   = addslashes($id);

    $data = addslashes($data);

    // delete the record associated with this id

    $sql = 'UPDATE '.$db_table.' SET '.$db_data_col.' = \''.$data.'\', '.$db_time_col.' = '.time().' WHERE '.$db_id_col.' = \''.$id.'\'';

    if (@pg_query($this->db, $sql))

    {

      return true;

    }

    // failed to write session data

    throw new sfDatabaseException(sprintf('sfPostgreSQLSessionStorage cannot write session data for id "%s".', $id));

  }

}