Yii 实现restful

首先做一下接口的 URL 规划，假设我们要面对的资源是 item ，现在我们暴露5个接口供其他应用调用，分别是：

对于所有 item 列表调用： GET /rest/item
对于某个 item 信息调用： GET /rest/item/(\d+)
创建一个 item： POST /rest/item
更新一个 item： PUT /rest/item/(\d+)
删除一个 item： DELETE /rest/item/(\d+)

'urlManager'=>array(
            'urlFormat'=>'path',
            'rules'=>array(

                //restful routers

                array('rest/list','pattern'=>'rest/item','verb'=>'GET'),
                array('rest/view','pattern'=>'rest/item/<id:\d+>','verb'=>'GET'),
                array('rest/create','pattern'=>'rest/item','verb'=>'POST'),
                array('rest/update','pattern'=>'rest/item/<id:\d+>','verb'=>'PUT'),
                array('rest/delete','pattern'=>'rest/item/<id:\d+>','verb'=>'GET'),

            ),
        ),
         

url配置请看：http://www.cnblogs.com/youxin/p/3870547.html

http://www.cnblogs.com/jshen/p/3732193.html

然后开始编写 REST 的 Controller，安装 yii 框架的约定，我们建立 protected/controllers/RestController.php ，文件内容结构如下：

class RestController extends Controller
{
  // Actions
  public function actionList()
  {
  }
  public function actionView()
  {
  }
  public function actionCreate()
  {
  }
  public function actionUpdate()
  {
  }
  public function actionDelete()
  {
  }
  // Assistant Functions
  private function _sendResponse()
  {
  }
  private function _getStatusCodeMessage()
  {
  }
}

实现：

<?php
class RestController extends Controller
{
    //actions
    public function actionList()
    {
        $items=Post::model()->findAll();//返回的是CActiveRecord[]
        if(empty($items))
        {
            $this->_sendResponse(200,"No items");
        }
        else
        {
            $rows=array();
            foreach($items as $item)
            {
                $rows[]=$item->attributes;//attributes         Returns all column attribute values.
            }
            $this->_sendResponse(200,CJson::encode($rows));
        }

    }
    public function actionView()
    {
        if(!isset($_GET['id']))
        {
            $this->_sendResponse(500,"Item Id is missing");
        }
        $item=Post::model()->findByPk($_GET['id']);
        if(is_null($item))
            $this->_sendResponse(404,"No item");
        else
            $this->_sendResponse(200,CJson::encode($item->attributes));

    }
    public function actionCreate()
    {
        $item=new Post();
        foreach($_POST as $var=>$value)
        {
            if($item->hasAttribute($var))
                $item->$var=$value;
            else
                $this->_sendResponse(500,"Paramter Error");
        }
            if($item->save())
                $this->_sendResponse(200,CJson::encode($item));
            else
                $this->_sendResponse(500,"Could not create Item");

    }
    public function actionUpdate()
    {
         //获取 put 方法所带来的 json 数据
      $json = file_get_contents('php://input');
      $put_vars = CJSON::decode($json,true);

      $item = Post::model()->findByPk($_GET['id']); 

      if(is_null($item))
        $this->_sendResponse(400, 'No Item found');

      foreach($put_vars as $var=>$value)
      {
        if($item->hasAttribute($var))
          $item->$var = $value;
        else
          $this->_sendResponse(500, 'Parameter Error');
      }

      if($item->save())
        $this->_sendResponse(200, CJson::encode($item));
      else
        $this->_sendResponse(500, 'Could not Update Item');
    }

    public function actionDelete()
    {
      $item = Post::model()->findByPk($_GET['id']);
      if(is_null($item))
        $this->_sendResponse(400, 'No Item found');
      if($item->delete())
        $this->_sendResponse(200, 'Delete Success');
      else
        $this->_sendResponse(500, 'Could not Delete Item');
    }

    private function _sendResponse($status,$body='',$content_type='text/html')
    {
        $status_header='HTTP/1.1 '.$status.' '.$this->_getStatusCodeMessage($status);
        header($status_header);
        header("Content-type: ".$content_type);
        echo $body;
        Yii::app()->end();
    }
    private function _getStatusCodeMessage($status)
    {
      $codes = array(
 200=> 'OK',
            400 => 'Bad Request',
            401 => 'Unauthorized',
            402 => 'Payment Required',
            403 => 'Forbidden',
            404 => 'Not Found',
            500 => 'Internal Server Error',
            501 => 'Not Implemented', );

      return (isset($codes[$status])) ? $codes[$status] : '';
    }

}

上面参考下面2篇文章：

http://www.nonb.cn/blog/yii-rest.html

http://www.cnblogs.com/ziyouchutuwenwu/p/3436415.html

http://www.yiiframework.com/forum/index.php?/topic/18412-new-yii-rest-tutorial/

http://stackoverflow.com/questions/6427904/restful-server-design-in-yii

http://www.yiiwiki.com/post/38

http://blog.csdn.net/myweishanli/article/details/17475397