Yii框架应用程序整合Ucenter实现同步注册、登录和退出等

[转]http://lonestone.iteye.com/blog/1129071

 

如今很多网站都要整合论坛程序，而康盛的Discuz系列产品往往是首选。然后就有了整合用户的需要，康盛提供了Ucenter架构，方便对不同的应用程序进行单点登录整合。

 

进来我尝试将ucenter整合到Yii网站中，获得了成功，虽然登录同步程序不是很妥当，基本使用没有问题了。我将继续改进。下面说说步骤：

 

1. 下载安装ucenter和discuz，我使用的是ucenter1.6和discuz7.2，由于7.2自带的uc_client是旧版本，所以需要覆盖一下1.6版本。
2. 复制一份uc_client文件夹到 protected/vendors/下，然后建立一个ucenter.php文件，内容如下：
   

   <?php
   include dirname(__FILE__).'/../config/main.php';
   include dirname(__FILE__).'/uc_client/client.php';

   可以看到这里只是包含了两个文件。然后打开yii的主配置文件 protected/config/main.php，加入ucenter的一些全局变量的设置：
   

   <?php
   define('UC_CONNECT', 'mysql');              // 连接 UCenter 的方式: mysql/NULL, 默认为空时为 fscoketopen()
                                               // mysql 是直接连接的数据库, 为了效率, 建议采用 mysql
   //数据库相关 (mysql 连接时, 并且没有设置 UC_DBLINK 时, 需要配置以下变量)
   define('UC_DBHOST', 'localhost');           // UCenter 数据库主机
   define('UC_DBUSER', 'root');                // UCenter 数据库用户名
   define('UC_DBPW', '');                  // UCenter 数据库密码
   define('UC_DBNAME', '027xfbbs');                // UCenter 数据库名称
   define('UC_DBCHARSET', 'utf8');             // UCenter 数据库字符集
   define('UC_DBTABLEPRE', '027xfbbs.uc_');            // UCenter 数据库表前缀
   
   //通信相关
   define('UC_KEY', 'ebR4GhhpZB7e9Mhb');               // 与 UCenter 的通信密钥, 要与 UCenter 保持一致
   define('UC_API', 'http://027xf.test/ucenter');  // UCenter 的 URL 地址, 在调用头像时依赖此常量
   define('UC_CHARSET', 'utf8');               // UCenter 的字符集
   define('UC_IP', '');                    // UCenter 的 IP, 当 UC_CONNECT 为非 mysql 方式时, 并且当前应用服务器解析域名有问题时, 请设置此值
   define('UC_APPID', 2);                  // 当前应用的 ID
   
   // uncomment the following to define a path alias
   // Yii::setPathOfAlias('local','path/to/local-folder');
   
   // This is the main Web application configuration. Any writable
   // CWebApplication properties can be configured here.
   return array(
       'basePath'=>dirname(__FILE__).DIRECTORY_SEPARATOR.'..',
   
   .....

   请根据你的情况修改上面的数据库名等设置。
3. 实现同步注册，我采用的是定义了表单RegisterForm来处理用户的注册，下面是一个典型的注册表单及其验证和业务逻辑代码：
   

   <?php
   
   /**
    * LoginForm class.
    * LoginForm is the data structure for keeping
    * user login form data. It is used by the 'login' action of 'SiteController'.
    */
   class RegisterForm extends CFormModel
   {
       public $username;
       public $password;
       public $repassword;
       public $email;
       public $verifyCode;
   
       /**
        * Declares the validation rules.
        * The rules state that username and password are required,
        * and password needs to be authenticated.
        */
       public function rules()
       {
           return array(
               // username and password are required
               array('username, password, repassword, email, verifyCode', 'required'),
               array('username', 'length', 'max'=>20, 'min'=>5),
               // 用户名唯一性验证
               //array('username', 'unique','caseSensitive'=>false,'className'=>'user','message'=>'用户名"{value}"已经被注册，请更换'),
               array('username', 'checkname'),
               // 密码一致性验证
               array('repassword', 'compare', 'compareAttribute'=>'password','message'=>'两处输入的密码并不一致'),
               // 电子邮件验证
               array('email', 'email'),
               // 电子邮件唯一性
               //array('email', 'unique','caseSensitive'=>false,'className'=>'user','message'=>'电子邮件"{value}"已经被注册，请更换'),
               array('email', 'checkemail'),
               //array('birthday', 'match', 'pattern'=& gt;'%^\d{4}(\-|\/|\.)\d{1,2}\1\d{1,2}$%', 'allowEmpty'=> true, 'message'=>'生日必须是年-月-日格式'),
               //array('mobile', 'length', 'max'=>11, 'min'=>11, 'tooLong'=>'手机号码错误','tooShort'=>'手机号码错误'),
               array('verifyCode', 'captcha', 'allowEmpty'=> false),
           );
       }
   
       public function checkname($attribute,$params)
       {
           //ucenter
           Yii::import('application.vendors.*');
           include_once 'ucenter.php';
           $flag = uc_user_checkname($this->username);
   
           switch($flag)
           {
               case -1:
                   $this->addError('username', '用户名不合法');
                   break;
               case -2:
                   $this->addError('username','包含不允许注册的词语');
                   break;
               case -3:
                   $this->addError('username','用户名已经存在');
                   break;
           }
       }
   
       public function checkemail($attribute,$params)
       {
           //ucenter
           Yii::import('application.vendors.*');
           include_once 'ucenter.php';
           $flag = uc_user_checkemail($this->email);
   
           switch($flag)
           {
               case -4:
                   $this->addError('email', 'Email 格式有误');
                   break;
               case -5:
                   $this->addError('email','Email 不允许注册');
                   break;
               case -6:
                   $this->addError('email','该 Email 已经被注册');
                   break;
           }
       }
   
       /**
        * Declares attribute labels.
        */
       public function attributeLabels()
       {
           return array(
               'username'=>'设定用户名',
               'password'=>'设定密码',
               'repassword'=>'再次输入密码',
               'email'=>'电子邮件地址',
               'mobile'=>'手机号码',
               'verifyCode'=>'验证码',
           );
       }
   
       /**
        * 注册用户
        * @return boolean whether register is successful
        */
       public function register($uid)
       {
           //ucenter
           Yii::import('application.vendors.*');
           include_once 'ucenter.php';
           $uid = uc_user_register($this->username, $this->password, $this->email);
           if($uid>0)
           {
               $model = new user;
               $model->attributes = $_POST['RegisterForm'];
               $model->password = md5($_POST['RegisterForm']['password']);
               $model->id = $uid;
   
               return $model->save();
           }
       }
   }

   我们看看上面的代码，调用了uc_user_checkname和uc_user_checkemail完成了用户名和email的验证，然后调用了 uc_user_register将用户注册到ucenter，成功后，再注册到Yii应用。
4. 实现用户登录，典型的Yii应用使用 CUserIdentity来实现登录，我们要做的就是继承它，实现自己的验证逻辑：
   

   <?php
   
   /**
    * UserIdentity represents the data needed to identity a user.
    * It contains the authentication method that checks if the provided
    * data can identity the user.
    */
   class UserIdentity extends CUserIdentity
   {
       public $id;
       /**
        * Authenticates a user.
        * The example implementation makes sure if the username and password
        * are both 'demo'.
        * In practical applications, this should be changed to authenticate
        * against some persistent user identity storage (e.g. database).
        * @return boolean whether authentication succeeds.
        */
       public function authenticate()
       {
           //ucenter
           Yii::import('application.vendors.*');
           include_once 'ucenter.php';
           list($uid, $username, $password, $email) = uc_user_login($this->username, $this->password);
           if($uid > 0)
           {
               $user = user::model()->findByPk($uid);
   
               if($user == null)//说明网站数据库中没有，而ucenter中有这个用户，添加用户
               {
                   $user = new user;
                   $user->username = $username;
                   $user->password = md5($password);
                   $user->email = $email;
                   $user->id = $uid;
                   $user->save();
   
                   $user->refresh();
               }
   
               $this->username = $user->username;
               $this->id = $user->id;
   
               $user->last_login_time = $user->this_login_time;
               $user->this_login_time = time();
               $user->last_login_ip = $user->this_login_ip;
               $user->this_login_ip = Yii::app()->getRequest()->userHostAddress;
               $user->save();
   
               $this->errorCode=self::ERROR_NONE;
           }
           elseif($uid == -1)
           {
               $this->errorCode=self::ERROR_USERNAME_INVALID;
           }
           elseif($uid == -2)
           {
               $this->errorCode=self::ERROR_PASSWORD_INVALID;
           }
   
           return !$this->errorCode;
       }
   
       public function getId()
       {
           return $this->id;
       }
   }

   请根据自己的应用情况进行修改即可，这里我们不需要对Yii的用户登录做任何修改。
5. 然后我们修改 SiteController/actionLogin 方法，将同步登录其他应用的js输出到浏览器：
   

   /**
        * Displays the login page
        */
       public function actionLogin()
       {
           $model=new LoginForm;
   
           // if it is ajax validation request
           if(isset($_POST['ajax']) && $_POST['ajax']==='login-form')
           {
               echo CActiveForm::validate($model);
               Yii::app()->end();
           }
   
           // collect user input data
           if(isset($_POST['LoginForm']))
           {
               $model->attributes=$_POST['LoginForm'];
               // validate user input and redirect to the previous page if valid
               if($model->validate() && $model->login())
               {
                   //ucenter
                   Yii::import('application.vendors.*');
                   include_once 'ucenter.php';
                   $script = uc_user_synlogin(Yii::app()->user->id);
                   $this->render('loginsuc', array(
                       'script' => $script,
                   ));
                   Yii::app()->end();
               }
           }
           // display the login form
           $this->render('login',array('model'=>$model));
       }

   简单的loginsuc.php视图文件：
   

   <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
   <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
   <head>
       <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
   </head>
   <body>
   <?php
   $this->layout = 'none';
   echo $script;
   ?>
   <script type="text/javascript">setTimeout('location.href="<?php echo Yii::app()->user->returnUrl ?>"',3000);</script>
   登录成功，正在返回登录前页面...
   </body>
   </html>

6. 继续修改 SiteController/actionLogout方法，实现同步退出：
   

   /**
        * Logs out the current user and redirect to homepage.
        */
       public function actionLogout()
       {
           Yii::app()->user->logout();
           //ucenter
           Yii::import('application.vendors.*');
           include_once 'ucenter.php';
           $script = uc_user_synlogout();
           $this->render('logoutsuc', array(
               'script' => $script,
           ));
           Yii::app()->end();
       }
   

   简单的logoutsuc.php视图文件：
   

   <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
   <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
   <head>
       <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
   </head>
   <body>
   <?php
   $this->layout = 'none';
   echo $script;
   ?>
   <script type="text/javascript">setTimeout('location.href="<?php echo Yii::app()->homeUrl ?>"',3000);</script>
   退出成功，正在返回首页...
   </body>
   </html>

7. 进行到这里，我们已经实现了整合ucenter的登录和注册了，这样ucenter中有的用户，可以登录到yii应用，yii应用也可以注册用户 到ucenter了。但是这还没有完成，我们需要的是在discuz中用户登录时，也同步登录yii应用，退出亦然，那么我们需要实现 Yii应用的 api/uc.php 这个接口程序。由于我们要用到Yii的框架资源，所以我没有采用硬编码的方式实现这个接口，而是创建了一个UcApplication类完成这个任务，继 续往下看。
8. 首先建立 api/uc.php 入口文件，代码如下：
   

   <?php
   define('UC_CLIENT_VERSION', '1.6.0');
   define('UC_CLIENT_RELEASE', '20110501');
   
   define('API_DELETEUSER', 1);        //note 用户删除 API 接口开关
   define('API_RENAMEUSER', 1);        //note 用户改名 API 接口开关
   define('API_GETTAG', 1);        //note 获取标签 API 接口开关
   define('API_SYNLOGIN', 1);      //note 同步登录 API 接口开关
   define('API_SYNLOGOUT', 1);     //note 同步登出 API 接口开关
   define('API_UPDATEPW', 1);      //note 更改用户密码 开关
   define('API_UPDATEBADWORDS', 1);    //note 更新关键字列表 开关
   define('API_UPDATEHOSTS', 1);       //note 更新域名解析缓存 开关
   define('API_UPDATEAPPS', 1);        //note 更新应用列表 开关
   define('API_UPDATECLIENT', 1);      //note 更新客户端缓存 开关
   define('API_UPDATECREDIT', 1);      //note 更新用户积分 开关
   define('API_GETCREDITSETTINGS', 1); //note 向 UCenter 提供积分设置 开关
   define('API_GETCREDIT', 1);     //note 获取用户的某项积分 开关
   define('API_UPDATECREDITSETTINGS', 1);  //note 更新应用积分设置 开关
   
   define('API_RETURN_SUCCEED', '1');
   define('API_RETURN_FAILED', '-1');
   define('API_RETURN_FORBIDDEN', '-2');
   
   // change the following paths if necessary
   $yii=dirname(__FILE__).'/../protected/yii-1.1.6/framework/yii.php';
   $config=dirname(__FILE__).'/../protected/config/main.php';
   
   // remove the following lines when in production mode
   defined('YII_DEBUG') or define('YII_DEBUG',true);
   // specify how many levels of call stack should be shown in each log message
   defined('YII_TRACE_LEVEL') or define('YII_TRACE_LEVEL',0);
   
   require_once($yii);
   require(dirname(__FILE__).'/../protected/components/UcApplication.php');
   Yii::createApplication('UcApplication', $config)->run();

   这里可以看到，这个脚本和标准的index.php是一样的，只是使用了不同的Application类。我们接着看这个类。
9. 建立 protected/components/UcApplication.php类文件：
   

   <?php
   class UcApplication extends CWebApplication
   {
       public $defaultController = 'Uc';
   
       private $route = '';
   
       protected function preinit()
       {
           $this->parseRequest();
       }
   
       private function parseRequest()
       {
           $_DCACHE = $get = $post = array();
   
           $code = @$_GET['code'];
           parse_str($this->_authcode($code, 'DECODE', UC_KEY), $get);
           if(MAGIC_QUOTES_GPC) {
               $get = $this->_stripslashes($get);
           }
   
           $timestamp = time();
           if($timestamp - $get['time'] > 3600) {
               //exit('Authracation has expiried');
           }
           if(emptyempty($get)) {
               exit('Invalid Request');
           }
           $action = $get['action'];
   
           require_once 'xml.class.php';
           $post = xml_unserialize(file_get_contents('php://input'));
           Yii::log($get, 'debug');
           Yii::log($post, 'debug');
           $_GET = $get;
           $_POST = $post;
   
           $this->route = $this->defaultController .'/'. $action;
   
           if(!in_array($action, array('test', 'deleteuser', 'renameuser', 'gettag', 'synlogin', 'synlogout', 'updatepw', 'updatebadwords', 'updatehosts', 'updateapps', 'updateclient', 'updatecredit', 'getcreditsettings', 'updatecreditsettings')))
           {
               exit(API_RETURN_FAILED);
           }
       }
   
       public function processRequest()
       {
           $this->runController($this->route);
       }
   
       private function _authcode($string, $operation = 'DECODE', $key = '', $expiry = 0) {
           $ckey_length = 4;
   
           $key = md5($key ? $key : UC_KEY);
           $keya = md5(substr($key, 0, 16));
           $keyb = md5(substr($key, 16, 16));
           $keyc = $ckey_length ? ($operation == 'DECODE' ? substr($string, 0, $ckey_length): substr(md5(microtime()), -$ckey_length)) : '';
   
           $cryptkey = $keya.md5($keya.$keyc);
           $key_length = strlen($cryptkey);
   
           $string = $operation == 'DECODE' ? base64_decode(substr($string, $ckey_length)) : sprintf('%010d', $expiry ? $expiry + time() : 0).substr(md5($string.$keyb), 0, 16).$string;
           $string_length = strlen($string);
   
           $result = '';
           $box = range(0, 255);
   
           $rndkey = array();
           for($i = 0; $i <= 255; $i++) {
               $rndkey[$i] = ord($cryptkey[$i % $key_length]);
           }
   
           for($j = $i = 0; $i < 256; $i++) {
               $j = ($j + $box[$i] + $rndkey[$i]) % 256;
               $tmp = $box[$i];
               $box[$i] = $box[$j];
               $box[$j] = $tmp;
           }
   
           for($a = $j = $i = 0; $i < $string_length; $i++) {
               $a = ($a + 1) % 256;
               $j = ($j + $box[$a]) % 256;
               $tmp = $box[$a];
               $box[$a] = $box[$j];
               $box[$j] = $tmp;
               $result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));
           }
   
           if($operation == 'DECODE') {
               if((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26).$keyb), 0, 16)) {
                   return substr($result, 26);
               } else {
                       return '';
                   }
           } else {
               return $keyc.str_replace('=', '', base64_encode($result));
           }
   
       }
   
       private function _stripslashes($string) {
           if(is_array($string)) {
               foreach($string as $key => $val) {
                   $string[$key] = $this->_stripslashes($val);
               }
           } else {
               $string = stripslashes($string);
           }
           return $string;
       }
   }

   这里可以看到，主要逻辑是processRequest方法，实现了ucenter通知的解码、调用相应的控制器和动作实现操作。
10. 然后建立 protected/controller/UcController.php文件，代码如下：
    

    <?php
    class UcController extends Controller
    {
        private $appdir = '';
    
        protected function beforeAction(CAction $action)
        {
            $this->appdir = Yii::app()->basePath . '/vendors/';
            return parent::beforeAction($action);
        }
    
        public function actionTest() {
            echo API_RETURN_SUCCEED;
        }
    
        public function actionDeleteuser() {
            $uids = explode(',', str_replace("'", '', $_GET['ids']));
            !API_DELETEUSER && exit(API_RETURN_FORBIDDEN);
    
            $users = user::model()->findAllByPk($uids);
            foreach($users as $user)
            {
                $user->delete();
            }
    
            echo API_RETURN_SUCCEED;
        }
    
        public function actionRenameuser() {
            $uid = $_GET['uid'];
            $usernameold = $_GET['oldusername'];
            $usernamenew = $_GET['newusername'];
            if(!API_RENAMEUSER) {
                echo API_RETURN_FORBIDDEN;
            }
    
            $user = user::model()->findByPk($uid);
            if($user !== null)
            {
                $user->username = $usernamenew;
                if($user->save(false))
                    echo API_RETURN_SUCCEED;
                else
                    echo API_RETURN_FAILED;
            }
        }
    
        public function actionGettag() {
            $name = $_GET['id'];
            if(!API_GETTAG) {
                echo API_RETURN_FORBIDDEN;
            }
    
            $echo = array();
            echo $this->_serialize($return, 1);
        }
    
        public function actionSynlogin() {
            $uid = $_GET['uid'];
            $username = $_GET['username'];
            if(!API_SYNLOGIN) {
                echo API_RETURN_FORBIDDEN;
            }
    
            $identity=new UcUserIdentity($username);
    
            if($identity->authenticate())
            {
                Yii::app()->user->login($identity, 0);
            }
    
            header('P3P: CP="CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR"');
            //$_SESSION[Yii::app()->user->stateKeyPrefix.'__id'] = $uid;
            //$_SESSION[Yii::app()->user->stateKeyPrefix.'__name'] = $username;
        }
    
        public function actionSynlogout() {
            if(!API_SYNLOGOUT) {
                echo API_RETURN_FORBIDDEN;
            }
    
            //note 同步登出 API 接口
            header('P3P: CP="CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR"');
            Yii::app()->user->logout();
        }
    
        public function actionUpdatepw() {
            if(!API_UPDATEPW) {
                echo API_RETURN_FORBIDDEN;
            }
            $username = $_GET['username'];
            $password = $_GET['password'];
    
            $user = user::model()->findByAttributes(array('username'=>$username));
            if($user !== null)
            {
                $user->password = md5($password);
                if($user->save())
                    echo API_RETURN_SUCCEED;
                else
                    echo API_RETURN_FAILED;
            }
            else
                echo API_RETURN_FAILED;
        }
    
        public function actionUpdatebadwords() {
            if(!API_UPDATEBADWORDS) {
                echo API_RETURN_FORBIDDEN;
            }
            $cachefile = $this->appdir.'./uc_client/data/cache/badwords.php';
            $fp = fopen($cachefile, 'w');
            $data = array();
            if(is_array($_POST)) {
                foreach($_POST as $k => $v) {
                    $data['findpattern'][$k] = $v['findpattern'];
                    $data['replace'][$k] = $v['replacement'];
                }
            }
            $s = "<?php\r\n";
            $s .= '$_CACHE[\'badwords\'] = '.var_export($data, TRUE).";\r\n";
            fwrite($fp, $s);
            fclose($fp);
            echo API_RETURN_SUCCEED;
        }
    
        public function actionUpdatehosts() {
            if(!API_UPDATEHOSTS) {
                echo API_RETURN_FORBIDDEN;
            }
            $cachefile = $this->appdir.'./uc_client/data/cache/hosts.php';
            $fp = fopen($cachefile, 'w');
            $s = "<?php\r\n";
            $s .= '$_CACHE[\'hosts\'] = '.var_export($_POST, TRUE).";\r\n";
            fwrite($fp, $s);
            fclose($fp);
            echo API_RETURN_SUCCEED;
        }
    
        public function actionUpdateapps() {
            if(!API_UPDATEAPPS) {
                echo API_RETURN_FORBIDDEN;
            }
            $UC_API = $_POST['UC_API'];
    
            //note 写 app 缓存文件
            $cachefile = $this->appdir.'./uc_client/data/cache/apps.php';
            $fp = fopen($cachefile, 'w');
            $s = "<?php\r\n";
            $s .= '$_CACHE[\'apps\'] = '.var_export($_POST, TRUE).";\r\n";
            fwrite($fp, $s);
            fclose($fp);
    
            //note 写配置文件
            $config_file = Yii::app()->basePath.'./config/main.php';
            if(is_writeable($config_file)) {
                $configfile = trim(file_get_contents($config_file));
                $configfile = substr($configfile, -2) == '?>' ? substr($configfile, 0, -2) : $configfile;
                $configfile = preg_replace("/define\('UC_API',\s*'.*?'\);/i", "define('UC_API', '$UC_API');", $configfile);
                if($fp = @fopen($config_file, 'w')) {
                    @fwrite($fp, trim($configfile));
                    @fclose($fp);
                }
            }
    
            echo API_RETURN_SUCCEED;
        }
    
        public function actionUpdateclient() {
            if(!API_UPDATECLIENT) {
                echo API_RETURN_FORBIDDEN;
            }
            $cachefile = $this->appdir.'./uc_client/data/cache/settings.php';
            $fp = fopen($cachefile, 'w');
            $s = "<?php\r\n";
            $s .= '$_CACHE[\'settings\'] = '.var_export($_POST, TRUE).";\r\n";
            fwrite($fp, $s);
            fclose($fp);
            echo API_RETURN_SUCCEED;
        }
    
        public function actionUpdatecredit() {
            if(!API_UPDATECREDIT) {
                echo API_RETURN_FORBIDDEN;
            }
            $credit = $_GET['credit'];
            $amount = $_GET['amount'];
            $uid = $_GET['uid'];
            echo API_RETURN_SUCCEED;
        }
    
        public function actionGetcredit() {
            if(!API_GETCREDIT) {
                echo API_RETURN_FORBIDDEN;
            }
        }
    
        public function actionGetcreditsettings() {
            if(!API_GETCREDITSETTINGS) {
                echo API_RETURN_FORBIDDEN;
            }
            $credits = array();
            echo $this->_serialize($credits);
        }
    
        public function actionUpdatecreditsettings() {
            if(!API_UPDATECREDITSETTINGS) {
                echo API_RETURN_FORBIDDEN;
            }
            echo API_RETURN_SUCCEED;
        }
    
        private function _serialize($arr, $htmlon = 0) {
            if(!function_exists('xml_serialize')) {
                include_once 'xml.class.php';
            }
            echo xml_serialize($arr, $htmlon);
        }
    }

    
    上面用到了xml.class.php这个类文件，可以在uc_client/lib目录找到。
    这里需要说明的是，actionSynlogin方法中，利用了我定义的特殊的UserIdentity来登录的，因为不需要提供密码。
11. 再来看看最后一个类：
    

    <?php
    
    /**
     * UserIdentity represents the data needed to identity a user.
     * It contains the authentication method that checks if the provided
     * data can identity the user.
     */
    class UcUserIdentity extends CUserIdentity
    {
        public $id;
    
        /**
         * Constructor.
         * @param string $username username
         */
        public function __construct($username)
        {
            $this->username=$username;
            $this->password='';
        }
        /**
         * Authenticates a user.
         * The example implementation makes sure if the username and password
         * are both 'demo'.
         * In practical applications, this should be changed to authenticate
         * against some persistent user identity storage (e.g. database).
         * @return boolean whether authentication succeeds.
         */
        public function authenticate()
        {
            $user = user::model()->findByAttributes(array('username'=>$this->username));
    
            if($user == null)//说明网站数据库中没有，而ucenter中有这个用户，添加用户
            {
                //ucenter
                Yii::import('application.vendors.*');
                include_once 'ucenter.php';
                list($uid, $username, $email) = uc_get_user($this->username);
                if($uid)
                {
                    $user = new user;
                    $user->username = $username;
                    $user->password = md5(rand(10000,99999));
                    $user->email = $email;
                    $user->id = $uid;
                    $user->save();
    
                    $user->refresh();
                }
            }
    
            $this->id = $user->id;
    
            $user->last_login_time = $user->this_login_time;
            $user->this_login_time = time();
            $user->last_login_ip = $user->this_login_ip;
            $user->this_login_ip = Yii::app()->getRequest()->userHostAddress;
            $user->save();
    
            $this->errorCode=self::ERROR_NONE;
    
            return !$this->errorCode;
        }
    
        public function getId()
        {
            return $this->id;
        }
    }

    可以看到，在这个认证类中，实现了对yii应用中没有的用户的建立操作。然后不需要对yii应用做任何特殊设置，就可以实现api接口了。
12. 然后我们在ucenter中添加yii应用的设置，修改main.php中的相应设置，应该就可以实现ucenter的同步登录、注册、退出、删除用户、修改用户名等等功能了！这个实现方法相对很Yii，呵呵。

有什么问题，欢迎评论，和我联系。大家一起进步吧！

 

PS: 需要注意的是，整合了ucenter的Yii应用在部署时，需将 protected/vendors/uc_client/data/及其子目录、文件设为可写。否则将会有些奇怪的问题。

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