[Sommaire] [Imprimer]

   1  <?php
   2  /**
   3   * SessionHandler implementation for LDAP directories.
   4   *
   5   * Required parameters:<pre>
   6   *   'foo'       The foo.
   7   *
   8   * Optional parameters:<pre>
   9   *   'hostspec'  The hostname of the ldap server.
  10   *
  11   * $Horde: framework/SessionHandler/SessionHandler/ldap.php,v 1.2.2.2 2005/10/18 11:01:27 jan Exp $
  12   *
  13   * This code is adapted from the comments at
  14   * http://www.php.net/session-set-save-handler.
  15   *
  16   * See the enclosed file COPYING for license information (LGPL). If you
  17   * did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
  18   *
  19   * @since   Horde 3.1
  20   * @package Horde_SessionHandler
  21   */
  22  class SessionHandler_ldap extends SessionHandler {
  23  
  24      /**
  25       * Handle for the current database connection.
  26       *
  27       * @var resource
  28       */
  29      var $_conn;
  30  
  31      /**
  32       * Open the SessionHandler backend.
  33       *
  34       * @param string $save_path     The path to the session object.
  35       * @param string $session_name  The name of the session.
  36       *
  37       * @return boolean  True on success, false otherwise.
  38       */
  39      function open($save_path, $session_name)
  40      {
  41          $this->_conn = @ldap_connect($this->_params['hostspec'], $this->_params['port']);
  42          return @ldap_bind($this->_conn, $this->_params['dn'], $this->_params['password']);
  43      }
  44  
  45      /**
  46       * Close the SessionHandler backend.
  47       *
  48       * @return boolean  True on success, false otherwise.
  49       */
  50      function close()
  51      {
  52          return @ldap_close($this->_conn);
  53      }
  54  
  55      /**
  56       * Read the data for a particular session identifier from the
  57       * SessionHandler backend.
  58       *
  59       * @param string $id  The session identifier.
  60       *
  61       * @return string  The session data.
  62       */
  63      function read($id)
  64      {
  65          $sr = @ldap_search($this->_conn, $this->_params['dn'], "(cn=$id)");
  66          $info = @ldap_get_entries($this->_conn, $sr);
  67          if ($info['count'] > 0) {
  68              return $info[0]['session'][0];
  69          } else {
  70              return '';
  71          }
  72      }
  73  
  74      /**
  75       * Write session data to the SessionHandler backend.
  76       *
  77       * @param string $id            The session identifier.
  78       * @param string $session_data  The session data.
  79       *
  80       * @return boolean  True on success, false otherwise.
  81       */
  82      function write($id, $session_data)
  83      {
  84          $update = array('objectClass' => array('phpsession', 'top'),
  85                          'session' => $session_data);
  86          $dn = "cn=$id," . $this->_params['dn'];
  87          @ldap_delete($this->_conn, $dn);
  88          return @ldap_add($this->_conn, $dn, $update);
  89      }
  90  
  91      /**
  92       * Destroy the data for a particular session identifier in the
  93       * SessionHandler backend.
  94       *
  95       * @param string $id  The session identifier.
  96       *
  97       * @return boolean  True on success, false otherwise.
  98       */
  99      function destroy($id)
 100      {
 101          $dn = "cn=$id," . $this->_params['dn'];
 102          return @ldap_delete($this->_conn, $dn);
 103      }
 104  
 105      /**
 106       * Garbage collect stale sessions from the SessionHandler backend.
 107       *
 108       * @param integer $maxlifetime  The maximum age of a session.
 109       *
 110       * @return boolean  True on success, false otherwise.
 111       */
 112      function gc($maxlifetime = 300)
 113      {
 114          $sr = @ldap_search($this->_conn, $this->_params['dn'],
 115                             '(objectClass=phpsession)', array('+', 'cn'));
 116          $info = @ldap_get_entries($this->_conn, $sr);
 117          if ($info['count'] > 0) {
 118              for ($i = 0; $i < $info['count']; $i++) {
 119                  $id = $info[$i]['cn'][0];
 120                  $dn = "cn=$id," . $this->_params['dn'];
 121                  $ldapstamp = $info[$i]['modifytimestamp'][0];
 122                  $year = substr($ldapstamp, 0, 4);
 123                  $month = substr($ldapstamp, 4, 2);
 124                  $day = substr($ldapstamp, 6, 2);
 125                  $hour = substr($ldapstamp, 8, 2);
 126                  $minute = substr($ldapstamp, 10, 2);
 127                  $modified = gmmktime($hour, $minute, 0, $month, $day, $year);
 128                  if (time() - $modified >= $maxlifetime) {
 129                      @ldap_delete($this->_conn, $dn);
 130                  }
 131              }
 132          }
 133  
 134          return true;
 135      }
 136  
 137  }