用memcache存储ecshop的session
2012-08-19 01:48 来源：www.chinab4c.com 作者：ecshop专家
将ecshop中的session放入到memcache中。好处是十分明显的。首先是ecshop session是存储在数据库中的。其次ecshop session表是内存表，虽然有很快的读写速度，但是对ecshop并发的健壮性来说，不是什么好事情。而且往往很容易找到简单的办法，让ecshop session表很快写满。这个时候我们将ecshop session放入到memcache中，好处是可见的。下面我发一个 ecshop将session放入memcache分类，希望家大测试完善。
<?php
/**
* ECSHOP SESSION 公用类库
* ============================================================================
* 版权所有 2005-2011 上海商派网络科技有限公司，并保留所有权利。
* 网站地址: http://www.ecshop.com；
* ----------------------------------------------------------------------------
* 这不是一个自由软件！您只能在不用于商业目的的前提下对程序代码进行修改和
* 使用；不允许对程序代码以任何形式任何目的的再发布。
* ============================================================================
* $Author: liubo $
* $Id: cls_session.php 17217 2011-01-19 06:29:08Z liubo $
*/
if (!defined('IN_ECS'))
{
die('Hacking attempt');
}
class cls_session
{
var $db = NULL;
var $session_table = '';
var $max_life_time = 1800; // SESSION 过期时间
var $session_name = '';
var $session_id = '';
var $session_expiry = '';
var $session_md5 = '';
var $session_cookie_path = '/';
var $session_cookie_domain = '';
var $session_cookie_secure = false;
var $memcache = null;
var $_ip = '';
var $_time = 0;
function __construct(&$db, $session_table, $session_data_table, $session_name = 'ECS_ID', $session_id = '')
{
$this->cls_session($db, $session_table, $session_data_table, $session_name, $session_id);
}
function cls_session(&$db, $session_table, $session_data_table, $session_name = 'ECS_ID', $session_id = '')
{
$this->memcache = new Memcache();
$this->memcache->connect("127.0.0.1","11211");
$GLOBALS['_SESSION'] = array();
if (!empty($GLOBALS['cookie_path']))
{
$this->session_cookie_path = $GLOBALS['cookie_path'];
}
else
{
$this->session_cookie_path = '/';
}
if (!empty($GLOBALS['cookie_domain']))
{
$this->session_cookie_domain = $GLOBALS['cookie_domain'];
}
else
{
$this->session_cookie_domain = '';
}
if (!empty($GLOBALS['cookie_secure']))
{
$this->session_cookie_secure = $GLOBALS['cookie_secure'];
}
else
{
$this->session_cookie_secure = false;
}
$this->session_name = $session_name;
$this->session_table = $session_table;
$this->session_data_table = $session_data_table;
$this->db = &$db;
$this->_ip = real_ip();
if ($session_id == '' && !empty($_COOKIE[$this->session_name]))
{
$this->session_id = $_COOKIE[$this->session_name];
}
else
{
$this->session_id = $session_id;
}
if ($this->session_id)
{
$tmp_session_id = substr($this->session_id, 0, 32);
if ($this->gen_session_key($tmp_session_id) == substr($this->session_id, 32))
{
$this->session_id = $tmp_session_id;
}
else
{
$this->session_id = '';
}
}
$this->_time = time();
if ($this->session_id)
{
$this->load_session();
}
else
{
$this->gen_session_id();
setcookie($this->session_name, $this->session_id . $this->gen_session_key($this->session_id), 0, $this->session_cookie_path, $this->session_cookie_domain, $this->session_cookie_secure);
}
register_shutdown_function(array(&$this, 'close_session'));
}
function gen_session_id()
{
$this->session_id = md5(uniqid(mt_rand(), true));
return $this->insert_session();
}
function gen_session_key($session_id)
{
static $ip = '';
if ($ip == '')
{
$ip = substr($this->_ip, 0, strrpos($this->_ip, '.'));
}
return sprintf('%08x', crc32(!empty($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] . ROOT_PATH . $ip . $session_id : ROOT_PATH . $ip . $session_id));
}
function insert_session()
{
$ar = array('expiry'=>$this->_time, 'ip'=>$this->_ip, 'data'=>'a:0:{}','userid'=>'0','adminid'=>'0','user_name'=>'','user_rank'=>'','discount'=>'','email'=>'');
return $this->memcache->set($this->session_id, $ar, false, $this->max_life_time);
}
function load_session()
{
$session = $this->memcache->get($this->session_id);
//print_r($session);
if (empty($session))
{
$this->insert_session();
$this->session_expiry = 0;
$this->session_md5 = '40cd750bba9870f18aada2478b24840a';
$GLOBALS['_SESSION'] = array();
}
else
{
if (!empty($session['data']) && $this->_time - $session['expiry'] <= $this->max_life_time)
{
$this->session_expiry = $session['expiry'];
$this->session_md5 = md5(base64_decode($session['data']));
$GLOBALS['_SESSION'] = unserialize(base64_decode($session['data']));
$GLOBALS['_SESSION']['user_id'] = $session['userid'];
$GLOBALS['_SESSION']['admin_id'] = $session['adminid'];
$GLOBALS['_SESSION']['user_name'] = $session['user_name'];
$GLOBALS['_SESSION']['user_rank'] = $session['user_rank'];
$GLOBALS['_SESSION']['discount'] = $session['discount'];
$GLOBALS['_SESSION']['email'] = $session['email'];
}
else
{
$session_data = $this->db->getRow('SELECT data, expiry FROM ' . $this->session_data_table . " WHERE sesskey = '" . $this->session_id . "'");
if (!empty($session_data['data']) && $this->_time - $session_data['expiry'] <= $this->max_life_time)
{
$this->session_expiry = $session_data['expiry'];
$this->session_md5 = md5($session_data['data']);
$GLOBALS['_SESSION'] = unserialize(base64_decode($session['data']));
$GLOBALS['_SESSION']['user_id'] = $session['userid'];
$GLOBALS['_SESSION']['admin_id'] = $session['adminid'];
$GLOBALS['_SESSION']['user_name'] = $session['user_name'];
$GLOBALS['_SESSION']['user_rank'] = $session['user_rank'];
$GLOBALS['_SESSION']['discount'] = $session['discount'];
$GLOBALS['_SESSION']['email'] = $session['email'];
}
else
{
$this->session_expiry = 0;
$this->session_md5 = '40cd750bba9870f18aada2478b24840a';
$GLOBALS['_SESSION'] = array();
}
}
}
}
function update_session()
{
$adminid = !empty($GLOBALS['_SESSION']['admin_id']) ? intval($GLOBALS['_SESSION']['admin_id']) : 0;
$userid = !empty($GLOBALS['_SESSION']['user_id']) ? intval($GLOBALS['_SESSION']['user_id']) : 0;
$user_name = !empty($GLOBALS['_SESSION']['user_name']) ? trim($GLOBALS['_SESSION']['user_name']) : 0;
$user_rank = !empty($GLOBALS['_SESSION']['user_rank']) ? intval($GLOBALS['_SESSION']['user_rank']) : 0;
$discount = !empty($GLOBALS['_SESSION']['discount']) ? round($GLOBALS['_SESSION']['discount'], 2) : 0;
$email = !empty($GLOBALS['_SESSION']['email']) ? trim($GLOBALS['_SESSION']['email']) : 0;
unset($GLOBALS['_SESSION']['admin_id']);
unset($GLOBALS['_SESSION']['user_id']);
unset($GLOBALS['_SESSION']['user_name']);
unset($GLOBALS['_SESSION']['user_rank']);
unset($GLOBALS['_SESSION']['discount']);
unset($GLOBALS['_SESSION']['email']);
$data = base64_encode(serialize(($GLOBALS['_SESSION'])));
$this->_time = time();
if ($this->session_md5 == md5($data) && $this->_time < $this->session_expiry + 10)
{
return true;
}
$data = addslashes($data);
if (isset($data{255}))
{
}
$ar = array('expiry'=>$this->_time, 'ip'=>$this->_ip, 'data'=>$data,'userid'=>$userid,'adminid'=>$adminid,'user_name'=>$user_name,'user_rank'=>$user_rank,'discount'=>number_format($discount,2,".",""),'email'=>$email);
return $this->memcache->replace($this->session_id, $ar, false, $this->max_life_time);
}
function close_session()
{
$this->update_session();
return true;
}
function delete_spec_admin_session($adminid)
{
if (!empty($GLOBALS['_SESSION']['admin_id']) && $adminid)
{
}
else
{
return false;
}
}
function destroy_session()
{
$GLOBALS['_SESSION'] = array();
setcookie($this->session_name, $this->session_id, 1, $this->session_cookie_path, $this->session_cookie_domain, $this->session_cookie_secure);
/* ECSHOP 自定义执行部分 */
if (!empty($GLOBALS['ecs']))
{
$this->db->query('DELETE FROM ' . $GLOBALS['ecs']->table('cart') . " WHERE session_id = '$this->session_id'");
}
/* ECSHOP 自定义执行部分 */
return $this->memcache->delete($this->session_id);
}
function get_session_id()
{
return $this->session_id;
}
function get_users_count()
{
$all_items = $this->db->getExtendedStats();
return $all_items['127.0.0.1:11211']['curr_items'];//由于有其他key的缓存，因此这只是个接近数值
}
}
?>
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