YII简单的文件下载

class DownloadController extends Controller
{
public function actionIndex()
{
$fileName = Yii::app()->basePath.'/../download_file/'.'xxx.txt';
$fp = fopen($fileName,'r');
$contents = fread($fp,filesize($fileName));
fclose($fp);

Yii::app()->request->sendFile($fileName,$contents);

}

}

其他复杂的东西需要sendFile的第三个参数来配置