将ecshop中的session机制重写,从DB移植到Memcache中去

 

[代码] [PHP]代码

http://www.oschina.net/code/snippet_83895_6963

 

001<?php

002  

003if (!defined('IN_ECS'))

004{

005    die('Hacking attempt');

006}

007  

008/*------------------------------------------------------ */

009//-- 该类用于将SESSION直接写入Memcache

010/*------------------------------------------------------ */

011class cls_session

012{

013    var$db            = NULL;

014  

015    var$max_life_time = 1800;// SESSION 过期时间

016  

017    var$session_name  = '';

018    var$session_id    = '';

019  

020    var$session_expiry= '';

021    var$session_md5   = '';

022  

023    var$session_cookie_path  = '/';

024    var$session_cookie_domain= '';

025    var$session_cookie_secure= false;

026  

027    var$_ip  = '';

028    var$_time= 0;

029  

030    function__construct(&$db,$session_table,$session_data_table,$session_name = 'ECS_ID', $session_id='')

031    {

032        $m=new Memcache;

033        $m->addServer('127.0.0.1', 11211);

034        $this->cls_session($m,$session_name,$session_id);

035    }

036  

037    functioncls_session(&$db,$session_name= 'ECS_ID',$session_id= '')

038    {

039        $GLOBALS['_SESSION'] =array();

040  

041        if(!empty($GLOBALS['cookie_path']))

042        {

043            $this->session_cookie_path =$GLOBALS['cookie_path'];

044        }

045        else

046        {

047            $this->session_cookie_path ='/';

048        }

049  

050        if(!empty($GLOBALS['cookie_domain']))

051        {

052            $this->session_cookie_domain =$GLOBALS['cookie_domain'];

053        }

054        else

055        {

056            $this->session_cookie_domain ='';

057        }

058  

059        if(!empty($GLOBALS['cookie_secure']))

060        {

061            $this->session_cookie_secure =$GLOBALS['cookie_secure'];

062        }

063        else

064        {

065            $this->session_cookie_secure = false;

066        }

067       

068        $this->session_name       =$session_name;

069  

070        $this->db  = &$db;

071        $this->_ip = real_ip();

072  

073        if($session_id== '' && !empty($_COOKIE[$this->session_name]))

074        {

075            $this->session_id =$_COOKIE[$this->session_name];

076        }

077        else

078        {

079            $this->session_id =$session_id;

080        }

081  

082        if($this->session_id)

083        {

084            $tmp_session_id=substr($this->session_id, 0, 32);

085            if($this->gen_session_key($tmp_session_id) ==substr($this->session_id, 32))

086            {

087                $this->session_id =$tmp_session_id;

088            }

089            else

090            {

091                $this->session_id ='';

092            }

093        }

094  

095        $this->_time = time();

096  

097        if($this->session_id)

098        {

099            $this->load_session();

100        }

101        else

102        {

103            $this->gen_session_id();

104            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);

105        }

106        register_shutdown_function(array(&$this,'close_session'));

107    }

108  

109    functiongen_session_id()

110    {

111        $this->session_id = md5(uniqid(mt_rand(), true));

112  

113        return$this->insert_session();

114    }

115  

116    functiongen_session_key($session_id)

117    {

118        static$ip= '';

119  

120        if($ip== '')

121        {

122            $ip=substr($this->_ip, 0,strrpos($this->_ip,'.'));

123        }

124  

125        returnsprintf('%08x', crc32(!empty($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] . ROOT_PATH .$ip. $session_id: ROOT_PATH .$ip. $session_id));

126    }

127  

128    functioninsert_session()

129    {

130        return$this->db->set($this->session_id,array('expiry'=>$this->_time,'ip'=>$this->_ip,'data'=>'a:0:{}'), false,$this->max_life_time);

131    }

132  

133    functionload_session()

134    {

135        $session=$this->db->get($this->session_id);

136        if(empty($session))

137        {

138            $this->insert_session();

139            $this->session_expiry = 0;

140            $this->session_md5 ='40cd750bba9870f18aada2478b24840a';

141            $GLOBALS['_SESSION'] =array();

142        }

143        else

144        {

145            if(!empty($session['data']) &&$this->_time -$session['expiry'] <=$this->max_life_time)

146            {

147                $this->session_expiry =$session['expiry'];

148                $this->session_md5 = md5($session['data']);

149                $GLOBALS['_SESSION']  = unserialize(stripslashes($session['data']));

150            }

151            else

152            {

153                $this->session_expiry = 0;

154                $this->session_md5 ='40cd750bba9870f18aada2478b24840a';

155                $GLOBALS['_SESSION']  =array();

156            }

157        }

158    }

159  

160    functionupdate_session()

161    {

162        $adminid= !empty($GLOBALS['_SESSION']['admin_id']) ? intval($GLOBALS['_SESSION']['admin_id']) : 0;

163        $userid = !empty($GLOBALS['_SESSION']['user_id'])  ? intval($GLOBALS['_SESSION']['user_id'])  : 0;

164  

165        $data= serialize($GLOBALS['_SESSION']);

166        $this->_time = time();

167  

168        if($this->session_md5 == md5($data) &&$this->_time <$this->session_expiry + 10)

169        {

170            returntrue;

171        }

172  

173        $data=addslashes($data);

174  

175        return$this->db->replace($this->session_id,array('expiry'=>$this->_time,'ip'=>$this->_ip,'userid'=>$userid,'adminid'=>$adminid,'data'=>$data), false,$this->max_life_time);

176    }

177  

178    functionclose_session()

179    {

180        $this->update_session();

181        returntrue;

182    }

183  

184    functiondelete_spec_admin_session($adminid)

185    {

186        if(!empty($GLOBALS['_SESSION']['admin_id']) && $adminid)

187        {

188            $all_items=$this->db->getExtendedStats('items');

189            $items=$all_items['127.0.0.1:11211']['items'];

190            foreach($itemsas $key => $item) {

191                if(isset($item['adminid'])) {

192                    if($item['adminid'] ==$adminid) return $this->db->delete($key);

193                }

194            }

195        }

196        else

197        {

198            returnfalse;

199        }

200    }

201  

202    functiondestroy_session()

203    {    

204        $GLOBALS['_SESSION'] =array();

205  

206        setcookie($this->session_name,$this->session_id, 1,$this->session_cookie_path,$this->session_cookie_domain,$this->session_cookie_secure);

207  

208        /* ECSHOP 自定义执行部分 */

209        if(!empty($GLOBALS['ecs']))

210        {

211            $GLOBALS['db']->query('DELETE FROM '.$GLOBALS['ecs']->table('cart') ." WHERE session_id = '$this->session_id'");

212        }

213        /* ECSHOP 自定义执行部分 */

214  

215        return$this->db->delete($this->session_id);

216    }

217  

218    functionget_session_id()

219    {

220        return$this->session_id;

221    }

222  

223    functionget_users_count()

224    {

225        $all_items=$this->db->getExtendedStats();

226        return$count= $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

227    }

228  

229}

230  

231?>