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|
<?php
/*
+-----------------------------------------------------------------------+
| program/include/session.inc |
| |
| This file is part of the RoundCube Webmail client |
| Copyright (C) 2005-2009, RoundCube Dev. - Switzerland |
| Licensed under the GNU GPL |
| |
| PURPOSE: |
| Provide database supported session management |
| |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
$Id$
*/
function rcube_sess_open($save_path, $session_name)
{
return true;
}
function rcube_sess_close()
{
return true;
}
// read session data
function rcube_sess_read($key)
{
global $SESS_CHANGED, $SESS_CLIENT_IP;
$DB = rcmail::get_instance()->get_dbh();
if ($DB->is_error()) {
return false;
}
$sql_result = $DB->query(
"SELECT vars, ip, " . $DB->unixtimestamp('changed') . " AS changed
FROM " . get_table_name('session') . "
WHERE sess_id=?",
$key);
if ($sql_arr = $DB->fetch_assoc($sql_result)) {
$SESS_CHANGED = $sql_arr['changed'];
$SESS_CLIENT_IP = $sql_arr['ip'];
if (strlen($sql_arr['vars']))
return $sql_arr['vars'];
}
return false;
}
// save session data
function rcube_sess_write($key, $vars)
{
$DB = rcmail::get_instance()->get_dbh();
if ($DB->is_error()) {
return false;
}
$sql_result = $DB->query(
"SELECT 1 FROM " . get_table_name('session') . "
WHERE sess_id=?",
$key);
$now = $DB->fromunixtime(time());
if ($DB->num_rows($sql_result)) {
$DB->query(
"UPDATE " . get_table_name('session') . "
SET vars=?, changed= " . $now . "
WHERE sess_id=?",
$vars,
$key);
}
else {
$DB->query(
"INSERT INTO " . get_table_name('session') . "
(sess_id, vars, ip, created, changed)
VALUES (?, ?, ?, " . $now . ", " . $now .")",
$key,
$vars,
(string)$_SERVER['REMOTE_ADDR']);
}
return true;
}
// handler for session_destroy()
function rcube_sess_destroy($key)
{
$rcmail = rcmail::get_instance();
$DB = $rcmail->get_dbh();
if ($DB->is_error()) {
return false;
}
$DB->query("DELETE FROM " . get_table_name('session') . " WHERE sess_id=?", $key);
return true;
}
// garbage collecting function
function rcube_sess_gc($maxlifetime)
{
$rcmail = rcmail::get_instance();
$DB = $rcmail->get_dbh();
if ($DB->is_error()) {
return false;
}
// just delete all expired sessions
$DB->query("DELETE FROM " . get_table_name('session') . "
WHERE changed < " . $DB->fromunixtime(time() - $maxlifetime));
if ($rcmail->config->get('enable_caching'))
rcmail_cache_gc();
rcmail_temp_gc();
return true;
}
function rcube_sess_regenerate_id()
{
$randval = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
for ($random = "", $i=1; $i <= 32; $i++) {
$random .= substr($randval, rand(0,(strlen($randval) - 1)), 1);
}
// use md5 value for id or remove capitals from string $randval
$random = md5($random);
// delete old session record
rcube_sess_destroy(session_id());
session_id($random);
$cookie = session_get_cookie_params();
$lifetime = $cookie['lifetime'] ? time() + $cookie['lifetime'] : 0;
rcmail::setcookie(session_name(), $random, $lifetime);
return true;
}
// set custom functions for PHP session management
session_set_save_handler('rcube_sess_open', 'rcube_sess_close', 'rcube_sess_read', 'rcube_sess_write', 'rcube_sess_destroy', 'rcube_sess_gc');
?>
|
