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<?php rcs_id('$Id: dba.php,v 1.4 2006/02/22 20:56:24 rurban Exp $');
/** DBA Sessions
* session:
* Index: session_id
* Values: date : IP : data
* @author: Reini Urban.
*/
class DbSession_dba
extends DbSession
{
var $_backend_type = "dba";
function DbSession_dba (&$dbh, $table) {
$this->_dbh = $dbh;
ini_set('session.save_handler','user');
session_module_name('user'); // new style
session_set_save_handler(array(&$this, 'open'),
array(&$this, 'close'),
array(&$this, 'read'),
array(&$this, 'write'),
array(&$this, 'destroy'),
array(&$this, 'gc'));
return $this;
}
function quote($str) { return $str; }
function query($sql) { return false; }
function & _connect() {
global $DBParams;
$dbh = &$this->_dbh;
if (!$dbh) {
$directory = '/tmp';
$prefix = 'wiki_';
$dba_handler = 'gdbm';
$timeout = 20;
extract($DBParams);
$dbfile = "$directory/$prefix" . 'session' . '.' . $dba_handler;
$dbh = new DbaDatabase($dbfile, 'c', $dba_handler);
$this->_dbh = &$dbh;
}
return $dbh;
}
function _disconnect() {
if (isset($this->_dbh))
$this->_dbh->close();
}
function open ($save_path, $session_name) {
$dbh = $this->_connect();
$dbh->open();
}
function close() {
if ($this->_dbh)
$this->_dbh->close();
}
function read ($id) {
$dbh = $this->_connect();
$result = $dbh->get($id);
if (!$result) {
return false;
}
list(,,$packed) = explode(':', $result, 3);
// $this->_disconnect();
if (strlen($packed) > 4000) {
trigger_error("Overlarge session data!", E_USER_WARNING);
$packed = '';
//$res = preg_replace('/s:6:"_cache";O:12:"WikiDB_cache".+}$/',"",$res);
}
return $packed;
}
function write ($id, $sess_data) {
$dbh = $this->_connect();
$time = time();
$ip = $GLOBALS['request']->get('REMOTE_ADDR');
if (strlen($sess_data) > 4000) {
trigger_error("Overlarge session data!", E_USER_WARNING);
$sess_data = '';
}
$dbh->set($id, $time.':'.$ip.':'.$sess_data);
//$this->_disconnect();
return true;
}
function destroy ($id) {
$dbh = $this->_connect();
$dbh->delete($id);
//$this->_disconnect();
return true;
}
function gc ($maxlifetime) {
$dbh = $this->_connect();
$threshold = time() - $maxlifetime;
for ($id = $dbh->firstkey(); $id !== false; $id = $dbh->nextkey()) {
$result = $dbh->get($id);
list($date,,) = explode(':', $result, 3);
if ($date < $threshold)
$dbh->delete($id);
}
//$this->_disconnect();
return true;
}
// WhoIsOnline support.
// TODO: ip-accesstime dynamic blocking API
function currentSessions() {
$sessions = array();
$dbh = $this->_connect();
for ($id = $dbh->firstkey(); $id !== false; $id = $dbh->nextkey()) {
$result = $dbh->get($id);
list($date,$ip,$packed) = explode(':', $result, 3);
if (!$packed) continue;
// session_data contains the <variable name> + "|" + <packed string>
// we need just the wiki_user object (might be array as well)
if ($date < 908437560 or $date > 1588437560)
$date = 0;
$user = strstr($packed, "wiki_user|");
$sessions[] = array('wiki_user' => substr($user,10), // from "O:" onwards
'date' => $date,
'ip' => $ip);
}
$this->_disconnect();
return $sessions;
}
}
// $Log: dba.php,v $
// Revision 1.4 2006/02/22 20:56:24 rurban
// fix more refs
//
// Revision 1.3 2005/08/07 10:49:57 rurban
// do not connect/disconnect each time. fix refs
//
// Revision 1.2 2005/08/07 10:07:55 rurban
// dba simplification: use default timeout
//
// Revision 1.1 2005/02/11 14:41:40 rurban
// seperate DbSession classes: less memory, a bit slower
//
// Local Variables:
// mode: php
// tab-width: 8
// c-basic-offset: 4
// c-hanging-comment-ender-p: nil
// indent-tabs-mode: nil
// End:
?>
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