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