yii2: how to response image and let browser show it?

Question

the same work can be done by follow code：

header('Content-Type:image/jpeg');
readfile('a.jpg');

but now I really confused by Yii2's \yii\web\Response.

---

What I confused is like that:

1. create a controller and action to provide picture

   See below

   class ServerController extends \yii\web\Controller
   {
       public function actionIndex($name)
       {
           // how to response
       }
   }
   

2. access http://example.com/index.php?r=server/index&name=foo.jpg

thanks for the answer!

Answer 1

Finally, I did it by follow codes:

$response = Yii::$app->getResponse();
$response->headers->set('Content-Type', 'image/jpeg');
$response->format = Response::FORMAT_RAW;
if ( !is_resource($response->stream = fopen($imgFullPath, 'r')) ) {
   throw new \yii\web\ServerErrorHttpException('file access failed: permission deny');
}
return $response->send();