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HomeBackend DevelopmentPHP Tutorialucenter通信原理分析_php技巧

1、用户登录discuz,通过logging.php文件中的函数uc_user_login对post过来的数据进行验证,也就是对username和password进行验证。

2、如果验证成功,将调用位于uc_client下client.php文件中的函数uc_user_synlogin,在这个函数中调用 uc_api_post(‘user', ‘synlogin', array(‘uid'=>$uid))。

3、然后这个函数后向Ucenter的index.php传递数据,index.php接受传递的数据,获得model为user,action为synlogin的值。

4、然后Ucenter的index.php调用control目录下的user.php类中的onsynlogin方法,通过foreach循环,以javascript的方式通知uc应用列表中开启同步登陆的应用进行同步登录;即通过get方式传递给各个应用目录中api下的uc.php一些数据。

5、uc.php接收通知并处理get过来的数据,并在函数synlogin(位于uc.php中)通过函数_authcode加密数据(默认以UC_KEY作为密钥),用函数_setcookie设置cookie。

6、各个应用用对应的密钥解码上面设置的cookie,得到用户id等数据;通过这个值来判断用户是否经过其它应用登录过,从而让用户可以自动登陆。

应用程序的logging.php ——>uc_client中的client.php——>Ucenter——>其他应用程序中的api/uc.php。

其实Ucenter实现同步登陆的原理就是cookie,一个应用登陆成功之后,向Ucenter传递数据,让Ucenter通知其他的应用也设置cookie,这样用户在访问其他应用的时候通过已经设置好的cookie实现自动登陆。

 

大致步骤 ,首先要安装 ucenter 然后把uc_client 这个文件夹复制到自己的项目里面去 ,然后呢在配置几个文件

client.php相当于函数库
uc.php相当于回调文件
config.php 是配置文件

当你有2个应用都设置了同步登陆之后  当你登陆一个应用 然后执行

复制代码 代码如下:

include ‘./config.inc.php';
include ‘./uc_client/client.php';
$usernames=”kyee”;
$passwords=”123456″;
list($uid, $username, $password, $email) = uc_user_login($usernames, $passwords);
if($uid > 0) {

setcookie(“username”,$username,time()+intval(24*3600));
echo uc_user_synlogin($uid);
echo ‘登录成功';
} elseif($uid == -1) {
echo ‘用户不存在,或者被删除';
} elseif($uid == -2) {
echo ‘密码错误';
} else {
echo ‘未定义';
}


uc_user_synlogin() 这个函数 代表着 要同步登陆到其他所有开启同步登陆的函数  uc自己会在后台把所有开启同步登陆的应用都给循环遍历一遍 然后 在页面上输出 
复制代码 代码如下:


类似这种的js代码 ,就是发送给每个开启同步登陆的应用, 然后每个开启同步登陆的应用的回调文件 uc.php 接受到后会进行解密,解密好后其实你就可以自己来写代码了,这个uc.php回调文件的代码不一定非要按照他们的格式来写 ,你也可以自己写你自己的代码 。

其实UC的原理很简单 ,就是某个应用登陆后,然后后台轮询发送给同步登陆的应用的回调文件 ,回调文件接收到用户ID之后,生成cookie或者session然后进入登陆模式。

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