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<?php
/**
* SessionHandler implementation for PHP's PEAR database abstraction layer.
*
* Required values for $params:<pre>
* 'phptype' The database type (e.g. 'pgsql', 'mysql', etc.).
* 'hostspec' The hostname of the database server.
* 'protocol' The communication protocol ('tcp', 'unix', etc.).
* 'username' The username with which to connect to the database.
* 'password' The password associated with 'username'.
* 'database' The name of the database.
* 'table' The name of the sessiondata table in 'database'.</pre>
*
* Required by some database implementations:
* 'options' Additional options to pass to the database.
* 'tty' The TTY on which to connect to the database.
* 'port' The port on which to connect to the database.
*
* Optional parameters:
* 'persistent' Use persistent DB connections? (boolean)
*
* The table structure can be created by the scripts/db/sessionhandler.sql
* script.
*
* $Horde: horde/lib/SessionHandler/sql.php,v 1.9.2.3 2003/05/19 17:56:11 slusarz Exp $
*
* Copyright 2002-2003 Mike Cochrane <mike@graftonhall>
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
*
* @author Mike Cochrame <mike@graftonhall.co.nz>
* @version $Revision: 1.9.2.3 $
* @since Horde 2.2
* @package horde.session
*/
class SessionHandler_sql extends SessionHandler {
/** Hash containing connection parameters. */
var $_params = array();
/** Handle for the current database connection.
@var object DB $_db */
var $_db;
/**
* Boolean indicating whether or not we're connected to the SQL
* server. */
var $_connected = false;
/**
* Constructs a new SQL SessionHandler object.
*
* @param array $params A hash containing connection parameters.
*/
function SessionHandler_sql($params = array())
{
$this->_params = $params;
}
function open($save_path, $session_name)
{
/* Connect to database */
$this->_connect();
}
function close()
{
/* Disconnect from Database */
$this->_disconnect();
}
function read($id)
{
/* Make sure we have a valid database connection. */
$this->_connect();
require_once HORDE_BASE . '/lib/SQL.php';
/* Execute the query. */
$result = Horde_SQL::readBlob($this->_db, $this->_params['table'], 'session_data',
array('session_id' => $id));
if (DB::isError($result)) {
Horde::logMessage($result, __FILE__, __LINE__, LOG_ERR);
return '';
}
return $result;
}
function write($id, $session_data)
{
/* Make sure we have a valid database connection. */
$this->_connect();
/* Build the SQL query. */
$query = sprintf('SELECT session_id FROM %s WHERE session_id = %s',
$this->_params['table'], $this->_db->quote($id));
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SQL Query by SessionHandler_sql::write(): query = "%s"', $query),
__FILE__, __LINE__, LOG_DEBUG);
/* Execute the query. */
$result = $this->_db->getOne($query);
if (DB::isError($result)) {
Horde::logMessage($result, __FILE__, __LINE__, LOG_ERR);
return false;
}
require_once HORDE_BASE . '/lib/SQL.php';
if ($result) {
$result = Horde_SQL::updateBlob($this->_db, $this->_params['table'], 'session_data',
$session_data, array('session_id' => $id),
array('session_lastmodified' => time()));
} else {
$result = Horde_SQL::insertBlob($this->_db, $this->_params['table'], 'session_data',
$session_data, array('session_id' => $id,
'session_lastmodified' => time()));
}
if (DB::isError($result)) {
Horde::logMessage($result, __FILE__, __LINE__, LOG_ERR);
return false;
}
return true;
}
function destroy($id)
{
/* Make sure we have a valid database connection. */
$this->_connect();
/* Build the SQL query. */
$query = sprintf('DELETE FROM %s WHERE session_id = %s',
$this->_params['table'], $this->_db->quote($id));
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SQL Query by SessionHandler_sql::destroy(): query = "%s"', $query),
__FILE__, __LINE__, LOG_DEBUG);
/* Execute the query. */
$result = $this->_db->query($query);
if (DB::isError($result)) {
Horde::logMessage($result, __FILE__, __LINE__, LOG_ERR);
return false;
}
return true;
}
function gc($maxlifetime = 300)
{
/* Make sure we have a valid database connection. */
$this->_connect();
/* Build the SQL query. */
$query = sprintf('DELETE FROM %s WHERE session_lastmodified < %s',
$this->_params['table'], $this->_db->quote(time() - $maxlifetime));
/* Log the query at a DEBUG log level. */
Horde::logMessage(sprintf('SQL Query by SessionHandler_sql::gc(): query = "%s"', $query),
__FILE__, __LINE__, LOG_DEBUG);
/* Execute the query. */
$result = $this->_db->query($query);
if (DB::isError($result)) {
Horde::logMessage($result, __FILE__, __LINE__, LOG_ERR);
return false;
}
return true;
}
/**
* Attempts to open a connection to the SQL server.
*
* @return boolean True on success; exits (Horde::fatal()) on error.
*/
function _connect()
{
if (!$this->_connected) {
if (!is_array($this->_params)) {
Horde::fatal(new PEAR_Error(_("No configuration information specified for SQL SessionHandler.")), __FILE__, __LINE__);
}
if (!isset($this->_params['phptype'])) {
Horde::fatal(new PEAR_Error(_("Required 'phptype' not specified in SessionHandler configuration.")), __FILE__, __LINE__);
}
if (!isset($this->_params['hostspec'])) {
Horde::fatal(new PEAR_Error(_("Required 'hostspec' not specified in SessionHandler configuration.")), __FILE__, __LINE__);
}
if (!isset($this->_params['username'])) {
Horde::fatal(new PEAR_Error(_("Required 'username' not specified in SessionHandler configuration.")), __FILE__, __LINE__);
}
if (!isset($this->_params['password'])) {
Horde::fatal(new PEAR_Error(_("Required 'password' not specified in SessionHandler configuration.")), __FILE__, __LINE__);
}
if (!isset($this->_params['database'])) {
Horde::fatal(new PEAR_Error(_("Required 'database' not specified in SessionHandler configuration.")), __FILE__, __LINE__);
}
if (!array_key_exists('table', $this->_params)) {
$this->_params['table'] = 'horde_sessionhandler';
}
/* Use persistent connections? */
if (empty($this->_params['persistent'])) {
$persistent = false;
} else {
$persistent = true;
}
/* Connect to the SQL server using the supplied parameters. */
include_once 'DB.php';
$this->_db = &DB::connect($this->_params, $persistent);
if (DB::isError($this->_db)) {
Horde::fatal($this->_db, __FILE__, __LINE__);
}
/* Enable the "portability" option. */
$this->_db->setOption('optimize', 'portability');
$this->_connected = true;
}
return true;
}
/**
* Disconnect from the SQL server and clean up the connection.
*
* @return boolean true on success, false on failure.
*/
function _disconnect()
{
if ($this->_connected) {
$this->_connected = false;
return $this->_db->disconnect();
}
return true;
}
}
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