+
+ static function logdeb($msg)
+ {
+ if (common_config('sessions', 'debug')) {
+ common_debug("Session: " . $msg);
+ }
+ }
+
+ static function open($save_path, $session_name)
+ {
+ return true;
+ }
+
+ static function close()
+ {
+ return true;
+ }
+
+ static function read($id)
+ {
+ self::logdeb("Fetching session '$id'");
+
+ $session = Session::staticGet('id', $id);
+
+ if (empty($session)) {
+ return '';
+ } else {
+ return (string)$session->session_data;
+ }
+ }
+
+ static function write($id, $session_data)
+ {
+ self::logdeb("Writing session '$id'");
+
+ $session = Session::staticGet('id', $id);
+
+ if (empty($session)) {
+ $session = new Session();
+
+ $session->id = $id;
+ $session->session_data = $session_data;
+ $session->created = common_sql_now();
+
+ return $session->insert();
+ } else {
+ if (strcmp($session->session_data, $session_data) == 0) {
+ self::logdeb("Not writing session '$id'; unchanged");
+ return true;
+ } else {
+ self::logdeb("Session '$id' data changed; updating");
+
+ $orig = clone($session);
+
+ $session->session_data = $session_data;
+
+ return $session->update($orig);
+ }
+ }
+ }
+
+ static function destroy($id)
+ {
+ self::logdeb("Deleting session $id");
+
+ $session = Session::staticGet('id', $id);
+
+ if (!empty($session)) {
+ return $session->delete();
+ }
+ }
+
+ static function gc($maxlifetime)
+ {
+ self::logdeb("garbage collection (maxlifetime = $maxlifetime)");
+
+ $epoch = common_sql_date(time() - $maxlifetime);
+
+ $ids = array();
+
+ $session = new Session();
+ $session->whereAdd('modified < "'.$epoch.'"');
+ $session->selectAdd();
+ $session->selectAdd('id');
+
+ $session->find();
+
+ while ($session->fetch()) {
+ $ids[] = $session->id;
+ }
+
+ $session->free();
+
+ foreach ($ids as $id) {
+ self::destroy($id);
+ }
+ }
+
+ static function setSaveHandler()
+ {
+ self::logdeb("setting save handlers");
+ $result = session_set_save_handler('Session::open', 'Session::close', 'Session::read',
+ 'Session::write', 'Session::destroy', 'Session::gc');
+ self::logdeb("save handlers result = $result");
+ return $result;
+ }