这个月我们新开发了一个项目,由于使用到了4台机器做web,使用dns做负载均衡,
上面图上用户通过DNS的调度(一个域名对应多个ip)分别访问到VM2-VM5上,四台机器都访问VM1上的redis,两个redis值主从结构.
因此需要使用跨服务器的session保存用户登录状态,于是我写了一个跨站的session共享的类
- <?php
- /*
- *用redis实现跨服务器session
- *注意需要安装phpredis模块
- *
- *作者:yifangyou
- *日期:2012-07-23 22:55:00
- **/
- class RedisSession{
- var $expire=86400;//过期时间
- var $sso_session;//session id
- var $session_folder;//session目录
- var $cookie_name;//cookie的名字
- var $redis;//redis连接
- var $cache;//缓存session
- var $expireAt;//过期时间
- /*
- *初始化
- *参数
- *$redis:php_redis的类实例
- *$cookie_name:cookie的名字
- *$session_id_prefix:sesion id的前缀
- **/
- function RedisSession($redis,$expire=86400,$cookie_name="sso_session",$session_id_prefix=""){
- $this->redis=$redis;
- $this->cookie_name=$cookie_name;
- $this->session_folder="sso_session:";
- //若是cookie已经存在则以它为session的id
- if(isset($_COOKIE[$this->cookie_name])){
- $this->sso_session=$_COOKIE[$this->cookie_name];
- }else{
- $this->expire=$expire;
- $this->expireAt=time()+$this->expire;
- //在IE6下的iframe无法获取到cookie,于是我使用了get方式传递了cookie的名字
- if(isset($_GET[$this->cookie_name])){
- $this->sso_session=$_GET[$this->cookie_name];
- }else{
- $this->sso_session=$this->session_folder.$session_prefix.md5(uniqid(rand(), true));
- }
- setcookie($this->cookie_name,$this->sso_session,$this->expireAt,"/");
- }
- }
-
- /*
- *设置过期时间
- *参数
- **/
- function expire($expire=86400){
- $this->expire=$expire;
- $this->expireAt=time()+$this->expire;
- //设置session过期时间
- setcookie($this->cookie_name,$this->sso_session,$this->expireAt,"/",".greatwallwine.com.cn");
- $this->redis->expireAt($this->sso_session, $this->expireAt);
- }
-
- /*
- *设置多个session的值
- *参数
- *$array:值
- **/
- function setMutil($array){
- $this->redis->hMset($this->sso_session,$array);
- }
- /*
- *设置session的值
- *参数
- *$key:session的key
- *$value:值
- **/
- function set($key,$value){
- $this->redis->hSet($this->sso_session,$key,$value);
- }
- /*
- *设置session的值为对象
- *参数
- *$key:session的key
- *$object:对象
- **/
- function setObject($key,$object){
- $this->redis->hSet($this->sso_session,$key,serialize($object));
- }
-
- /*
- *获取全部session的key和value
- @return: array
- **/
- function getAll(){
- return $this->redis->hGetAll($this->sso_session);
- }
-
-
-
- /*
- *获取一个session的key和value
- @return: array
- **/
- function get($key){
- return $this->redis->hGet($this->sso_session,$key);
- }
-
- /*
- *获取session的值为对象
- *参数
- *$key:session的key
- *$value:cookie的名字
- **/
- function getObject($key){
- return unserialize($this->redis->hGet($this->sso_session,$key));
- }
- /*
- *从缓存中获取一个session的key和value
- @return: array
- **/
- function getFromCache($key){
- if(!isset($this->cache)){
- $this->cache=$this->getAll();
- }
- return $this->cache[$key];
- }
-
- /*
- *删除一个session的key和value
- @return: array
- **/
- function del($key){
- return $this->redis->hDel($this->sso_session,$key);
- }
- /*
- *删除所有session的key和value
- @return: array
- **/
- function delAll(){
- return $this->redis->delete($this->sso_session);
- }
- }
- ?>
使用方法:
- <?php
- error_reporting(0);
- $redisHost="192.168.1.2";
- $redisPort="6379";
- $redis = new Redis();
- $redis->connect($redisHost,$redisPort);
- include_once("inc/RedisSession.php");
- $redisSession=new RedisSession($redis);
- /*
- $redisSession->set("name","sdf4");
- $redisSession->set("age",1234);
- $redisSession->set("***","man14");
- $redisSession->set("name","abc4");
- $redisSession->setMutil(array("province"=>"guangdong","city"=>"guangzhou"));
- */
- $redisSession->setObject("obj",array("test1"=>array("test2")));
- $obj=$redisSession->getObject("obj");
- print_r($obj);
- die();
- print_r($redisSession->getAll());
- //$redisSession->del("name");
- print_r($redisSession->get("name"));
- //print_r($redisSession->get("province"));
- //$redisSession->delAll();
- //print_r($redisSession->getAll());
- print_r($redisSession->getFromCache("name"));
- /*
- $redisSession->del("name");
- $redisSession->delAll();
- */
比较常用的估计是set,get,setObject,getOject
我用sso_session:我主要是方便用phpRedisAdmin管理
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