PHP 共享 JAVA 保存的session信息
情景:
1:现在有两个系统,一个是Java做的系统,一个是PHP的系统,现在要把两个系统弄成一个单点登录。
2:两个系统两个库,两个库的表结构完全不同,现在要解决的就是session共享问题和用户信息的同步。
方法:::
1:java系统为主系统,php那边的登录,退出,注册都跳到java那边系统去登录。
2:java系统那边可以创建一个“session表“存的是每个用户对应session信息。php那边就要根据用户ID去‘session表’,存在取出相关信息,做登录。因为要维护两个库,所以php那边要查询自己库中是否存在这个用户,不存在需要添加。(没用这种方式,需要维护session的生命周期太麻烦)
3 **:创建”一个sesison表“对两边的系统都要付出比较大的代价,而且每次都要查数据库,session有效期维护那边程序也很复杂。所以借组于“memcache",tomat 于memcache整合(http://bbhaiidreamer.blog.51cto.com/3398980/841814)。这样的话,session信息就交memcache管理了。(项目采用这种方法)。
4:JAVA 与 PHP 是一、二级域名,可以实现cookie共享。这样在php那边通过得到session_id 到memcache里面去取用户的信息。由于java跟php的memcache存的格式不一样。java存的时xml格式的,所以php还要做一些处理,通过session_id,取到对应的xml,再解析xml里面的内容。完后再做登录操作。存在,直接登录,不存在,入库再登录操作。
java代码不用做什么处理,php这边的代码如下:
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function qa_get_logged_in_user(){ // Until you edit this function, nobody is ever logged in // echo "<script>alert('get_logged_in_user');</script>"; //从cookie里面取JSESSIONID,如果存在,取出session值 if ( $_COOKIE [ 'JSESSIONID' ]){ //echo "<script>alert('COOKIE hava' );</script>"; $session_id = $_COOKIE [ 'JSESSIONID' ]; } else { echo "<script>alert('COOKIE null ');</script>" ; } //连接memcachd,从memcache取用户信息 $memcache = new Memcache; $memcache ->connect( '192.168.252.*' , 11211) or die ( "Could not connect" ); $var = $memcache ->get( $session_id ); //解析从memcached取出来的xml,取到用户相关属性 $xml_parser = new PageXml(); $date_xml = $xml_parser ->del_xml( $var ); if ( empty ( $date_xml )){ // return null; } else { $results = array ( $devName , $contact , $email , $regTime , $devId ); $devName = $date_xml [0]; $contant = $date_xml [1]; $email = $date_xml [2]; $regTime = $date_xml [3]; $devId = $date_xml [4]; // get in session or cookie. $qa_db_connection =qa_db_connection(); $sql = "SELECT userid,email,handle FROM t_users WHERE email='$email'" ; $result =mysql_fetch_assoc(mysql_query( $sql , $qa_db_connection )); //echo "<script>alert('get_logged_in_user-select user = $result');</script>"; if ( is_array ( $result )){ return array ( 'userid' => $result [ 'userid' ], 'publicusername' => $result [ 'handle' ], 'email' => $result [ 'email' ], 'level' => ( $devName == 'admin' ) ? 1: 0 ); } else { $insert_result = mysql_query( "INSERT INTO t_users (created, createip, email, passsalt, passcheck, level, handle, loggedin, loginip,flags) " . "VALUES (NOW(), 0, '$email', '' , '',0, '$contant', NOW(),0,1)" , $qa_db_connection ); $d_id = mysql_insert_id(); //返回插入的userId //echo "<script>alert('get_logged_in_user-insert user = $insert_result,userid=$d_id');</script>"; return array ( 'userid' => $d_id , 'publicusername' => $contant , 'email' => $email , 'level' => ( $devName == 'admin' ) ? 1: 0); } } } /* * 解析xml类 2012-11-13 */ class PageXml { function del_xml( $var ) { // echo $var; $first = strpos ( $var , "xml" ); //字符第一次出现的位置 //echo "fist = ".$first."<br>"; $last = strrpos ( $var , ">" ); //字符最后一次出现的位置 // echo "last = ".$last; $resultXml = substr ( $var , $first -2, $last ); //截取字符串,形式如:substr($string,0,-3); $dom = new DOMDocument( '1.0' ); $dom ->loadXML( $resultXml ); //获取具体的节点 $messages = $dom ->getElementsByTagName( 'v' ); foreach ( $messages as $book ) { $x_class = $book ->getAttribute( 'class' ); if ( $x_class == 'com.kkpush.account.domain.Developer' ){ $devName = $book ->getAttribute( 'devName' ); $contact = $book ->getAttribute( 'contact' ); $email = $book -> getAttribute( 'email' ); $regTime = $book -> getAttribute( 'regTime' ); $devId = $book -> getAttribute( 'devId' ); $results = array ( $devName , $contact , $email , $regTime , $devId ); return $results ; } } return null; } |
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Memcache取出来的xml内容如下: 3K:�x�<:�{H01:�{Hb#C9437013AB69ED7F06BF3E634E78AC27-n1<? xml version = "1.0" encoding = "UTF-8" ?> < attributes class = "java.util.concurrent.ConcurrentHashMap" __id = "0" size = "3" > < k class = "java.lang.String" __id = "1" value = "userName" /> < v class = "java.lang.String" __id = "2" value = "kktalk" /> < k class = "java.lang.String" __id = "3" value = "user" /> <!-- 这里就是用户的信息,只要解析这个就好了 --> < v class = "com.youar.account.domain.Developer" __id = "4" devId = "91" devName = "youa" contact = "youra" password = "youa" email = "" QQ = "9999999" regTime = "2012-11-13 09:56:22.0" lastUpdateTime = "2012-11-13 09:56:19.0" isEnabled = "0" isActivation = "0" activationCode = "fab9ef6e-9e2c-43e1-8ab5-1fb473a9aeed" isCustomDiscount = "0" clickRate = "0.0" showRate = "0.0" tempPasswordTime = "2012-01-01 20:20:20.0" companyName = "ktlak" /> < k class = "java.lang.String" __id = "5" value = "randCheckCode" /> < v class = "java.lang.String" __id = "6" value = "7386" /> </ attributes > |
ps: 由于php系统比较特殊,用户表中只需要维护几个关键字段而已。在这里讲的是正对于我目前的系统,只供参考,具体问题具体分析。如有说错的地方,望指正。