Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
// Session management functions. These provide database storage of PHP
// session info.
use Friendica\Core\Config;
use Friendica\Database\DBM;
require_once('include/cache.php');
$session_exists = 0;
$session_expire = 180000;
function ref_session_open($s, $n) {
return true;
}
function ref_session_read($id) {
global $session_exists;
if (!x($id)) {
return '';
}
$memcache = cache::memcache();
if (is_object($memcache)) {
$data = $memcache->get(get_app()->get_hostname().":session:".$id);
if (!is_bool($data)) {
$session_exists = true;
return $data;
}
logger("no data for session $id", LOGGER_TRACE);
return '';
}
$r = dba::select('session', array('data'), array('sid' => $id), array('limit' => 1));
if (DBM::is_result($r)) {
$session_exists = true;
return $r['data'];
} else {
logger("no data for session $id", LOGGER_TRACE);
}
return '';
}
/**
* @brief Standard PHP session write callback
*
* This callback updates the DB-stored session data and/or the expiration depending
* on the case. Uses the $session_expire global for existing session, 5 minutes
* for newly created session.
*
* @global bool $session_exists Whether a session with the given id already exists
* @global int $session_expire Session expiration delay in seconds
* @param string $id Session ID with format: [a-z0-9]{26}
* @param string $data Serialized session data
* @return boolean Returns false if parameters are missing, true otherwise
*/
function ref_session_write($id, $data) {
global $session_exists, $session_expire;
if (!$id || !$data) {
return false;
}
$expire = time() + $session_expire;
$default_expire = time() + 300;
$memcache = cache::memcache();
$a = get_app();
if (is_object($memcache) && is_object($a)) {
$memcache->set($a->get_hostname().":session:".$id, $data, MEMCACHE_COMPRESSED, $expire);
return true;
}
if ($session_exists) {
$fields = array('data' => $data, 'expire' => $expire);
$condition = array("`sid` = ? AND (`data` != ? OR `expire` != ?)", $id, $data, $expire);
dba::update('session', $fields, $condition);
} else {
$fields = array('sid' => $id, 'expire' => $default_expire, 'data' => $data);
dba::insert('session', $fields);
}
return true;
}
function ref_session_close() {
return true;
}
function ref_session_destroy($id) {
$memcache = cache::memcache();
if (is_object($memcache)) {
$memcache->delete(get_app()->get_hostname().":session:".$id);
return true;
}
dba::delete('session', array('sid' => $id));
return true;
}
function ref_session_gc($expire) {
dba::delete('session', array("`expire` < ?", time()));
return true;
}
$gc_probability = 50;
ini_set('session.gc_probability', $gc_probability);
ini_set('session.use_only_cookies', 1);
ini_set('session.cookie_httponly', 1);
if (Config::get('system', 'ssl_policy') == SSL_POLICY_FULL) {
ini_set('session.cookie_secure', 1);
}
if (!Config::get('system', 'disable_database_session')) {
session_set_save_handler('ref_session_open', 'ref_session_close',
'ref_session_read', 'ref_session_write',
'ref_session_destroy', 'ref_session_gc');
}