forked from GNUsocial/gnu-social
219 lines
6.8 KiB
PHP
219 lines
6.8 KiB
PHP
<?php
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/**
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* Table Definition for session
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*
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* StatusNet - the distributed open-source microblogging tool
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* Copyright (C) 2009, StatusNet, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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if (!defined('STATUSNET') && !defined('LACONICA')) {
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exit(1);
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}
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require_once INSTALLDIR . '/classes/Memcached_DataObject.php';
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class Session extends Managed_DataObject
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{
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###START_AUTOCODE
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/* the code below is auto generated do not remove the above tag */
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public $__table = 'session'; // table name
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public $id; // varchar(32) primary_key not_null
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public $session_data; // text()
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public $created; // datetime() not_null
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public $modified; // timestamp() not_null default_CURRENT_TIMESTAMP
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/* the code above is auto generated do not remove the tag below */
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###END_AUTOCODE
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public static function schemaDef()
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{
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return [
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'fields' => [
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'id' => ['type' => 'varchar', 'length' => 32, 'not null' => true, 'description' => 'session ID'],
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'session_data' => ['type' => 'text', 'description' => 'session data'],
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'created' => ['type' => 'datetime', 'not null' => true, 'description' => 'date this record was created'],
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'modified' => ['type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'],
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],
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'primary key' => ['id'],
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'indexes' => [
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'session_modified_idx' => ['modified'],
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],
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];
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}
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static function open($save_path, $session_name)
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{
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return true;
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}
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static function close()
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{
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return true;
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}
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static function read($id)
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{
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self::logdeb("Fetching session '$id'");
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$session = Session::getKV('id', $id);
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if (empty($session)) {
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self::logdeb("Couldn't find '$id'");
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return '';
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} else {
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self::logdeb("Found '$id', returning " .
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strlen($session->session_data) .
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" chars of data");
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return (string)$session->session_data;
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}
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}
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static function logdeb($msg)
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{
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if (common_config('sessions', 'debug')) {
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common_debug("Session: " . $msg);
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}
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}
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static function write($id, $session_data)
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{
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self::logdeb("Writing session '$id'");
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$session = Session::getKV('id', $id);
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if (empty($session)) {
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self::logdeb("'$id' doesn't yet exist; inserting.");
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$session = new Session();
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$session->id = $id;
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$session->session_data = $session_data;
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$session->created = common_sql_now();
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$result = $session->insert();
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if (!$result) {
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common_log_db_error($session, 'INSERT', __FILE__);
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self::logdeb("Failed to insert '$id'.");
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} else {
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self::logdeb("Successfully inserted '$id' (result = $result).");
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}
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return $result;
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} else {
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self::logdeb("'$id' already exists; updating.");
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if (strcmp($session->session_data, $session_data) == 0) {
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self::logdeb("Not writing session '$id'; unchanged");
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return true;
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} else {
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self::logdeb("Session '$id' data changed; updating");
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$orig = clone($session);
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$session->session_data = $session_data;
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$result = $session->update($orig);
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if (!$result) {
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common_log_db_error($session, 'UPDATE', __FILE__);
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self::logdeb("Failed to update '$id'.");
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} else {
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self::logdeb("Successfully updated '$id' (result = $result).");
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}
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return $result;
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}
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}
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}
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static function gc($maxlifetime)
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{
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self::logdeb("garbage collection (maxlifetime = $maxlifetime)");
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$epoch = common_sql_date(time() - $maxlifetime);
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$ids = [];
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$session = new Session();
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$session->whereAdd('modified < "' . $epoch . '"');
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$session->selectAdd();
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$session->selectAdd('id');
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$limit = common_config('sessions', 'gc_limit');
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if ($limit > 0) {
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// On large sites, too many sessions to expire
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// at once will just result in failure.
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$session->limit($limit);
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}
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$session->find();
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while ($session->fetch()) {
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$ids[] = $session->id;
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}
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$session->free();
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self::logdeb("Found " . count($ids) . " ids to delete.");
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foreach ($ids as $id) {
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self::logdeb("Destroying session '$id'.");
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self::destroy($id);
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}
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}
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static function destroy($id)
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{
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self::logdeb("Deleting session $id");
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$session = Session::getKV('id', $id);
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if (empty($session)) {
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self::logdeb("Can't find '$id' to delete.");
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return false;
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} else {
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$result = $session->delete();
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if (!$result) {
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common_log_db_error($session, 'DELETE', __FILE__);
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self::logdeb("Failed to delete '$id'.");
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} else {
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self::logdeb("Successfully deleted '$id' (result = $result).");
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}
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return $result;
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}
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}
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static function setSaveHandler()
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{
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self::logdeb("setting save handlers");
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$result = session_set_save_handler('Session::open', 'Session::close', 'Session::read',
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'Session::write', 'Session::destroy', 'Session::gc');
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self::logdeb("save handlers result = $result");
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// PHP 5.3 with APC ends up destroying a bunch of object stuff before the session
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// save handlers get called on request teardown.
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// Registering an explicit shutdown function should take care of this before
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// everything breaks on us.
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register_shutdown_function('Session::cleanup');
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return $result;
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}
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static function cleanup()
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{
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session_write_close();
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}
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}
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