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102 lines
2.4 KiB
102 lines
2.4 KiB
<?php
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// (c) Copyright by authors of the Tiki Wiki CMS Groupware Project
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//
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// All Rights Reserved. See copyright.txt for details and a complete list of authors.
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// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See license.txt for details.
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// $Id$
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class MemcacheSession
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{
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private $enabled = false;
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private $lib;
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/**
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* Set up the session cache, hijacking handlers from ADODB_Session
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* presumably already in place.
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*/
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public function _init()
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{
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session_set_save_handler(
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[ $this, 'open' ],
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[ $this, 'close' ],
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[ $this, 'read' ],
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[ $this, 'write' ],
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[ $this, 'destroy' ],
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[ $this, 'gc' ]
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);
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$this->enabled = TikiLib::lib("memcache")->isEnabled();
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$this->lib = TikiLib::lib("memcache");
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}
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/**
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* Build a memcache key based on a given session key
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*
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* @param string Session key
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* @return string Memcache key
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*/
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private function buildCacheKey($session_key)
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{
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return $this->lib ? $this->lib->buildKey(['role' => 'session-cache', 'session_key' => $session_key]) : false;
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}
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public function __destruct()
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{
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session_write_close();
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}
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public function open($save_path, $session_name, $persist = null)
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{
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return $this->enabled;
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}
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public function close()
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{
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return $this->enabled;
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}
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public function read($key)
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{
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$cache_key = $this->buildCacheKey($key);
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if ($this->enabled) {
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return $this->lib->get($cache_key) ?: '';
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}
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}
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public function write($key, $val)
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{
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global $prefs;
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if ($this->enabled) {
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$lock_key = $this->buildCacheKey($key . '.lock');
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if (! $this->lib->get($lock_key)) {
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$this->lib->set($lock_key, $key, 60 * $prefs['session_lifetime']);
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$this->lib->set($this->buildCacheKey($key), $val, 60 * $prefs['session_lifetime']);
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$this->lib->delete($lock_key);
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}
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}
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return $this->enabled;
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}
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public function destroy($key)
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{
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if ($this->enabled) {
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$this->lib->delete($this->buildCacheKey($key));
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}
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return $this->enabled;
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}
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public function gc($maxlifetime)
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{
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return $this->enabled;
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}
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}
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$memcache_session = new MemcacheSession();
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$memcache_session->_init();
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