mirror of
https://gitee.com/hyperf/hyperf.git
synced 2024-12-05 13:18:22 +08:00
44 lines
2.6 KiB
Markdown
44 lines
2.6 KiB
Markdown
# Controller
|
|
|
|
To process HTTP requests by using Controller, you need to bind routing and controller methods in `Config` or `Annotation` way. Check the chapter [Router](en/route.md) for more details.
|
|
|
|
For the `Request` and `Response`, Hyperf provids `Hyperf\HttpServer\Contract\RequestInterface` and `Hyperf\HttpServer\Contract\ResponseInterface` for you to get parameters and return values. Check the chapters [Request](en/request.md) and [Response](en/response.md) for more details.
|
|
|
|
## Create a Controller
|
|
|
|
```php
|
|
<?php
|
|
|
|
declare(strict_types=1);
|
|
|
|
namespace App\Controller;
|
|
|
|
use Hyperf\HttpServer\Contract\RequestInterface;
|
|
use Hyperf\HttpServer\Contract\ResponseInterface;
|
|
|
|
class IndexController
|
|
{
|
|
// Related objects will be automatically injected by the dependency injection container if you obtain such objects by defining RequestInterface and ResponseInterface on the parameters.
|
|
public function index(RequestInterface $request, ResponseInterface $response)
|
|
{
|
|
$target = $request->input('target', 'World');
|
|
return 'Hello ' . $target;
|
|
}
|
|
}
|
|
```
|
|
|
|
> Assume this `Controller` has been defined as `/` route through `Config`. (Of course, you can also define it through `Annotation`)
|
|
|
|
Call this address through `cURL`, and you can see the returned content.
|
|
|
|
```bash
|
|
$ curl http://127.0.0.1:9501/\?target\=Hyperf
|
|
Hello Hyperf.
|
|
```
|
|
|
|
## Avoid data confusion between coroutines
|
|
|
|
In the traditional PHP-FPM framework, an `AbstractController` (or an abstract parent class in other names) would be provided. Then, other defined `Controller` will perform some requests or responses based on the `AbstractController`. However, in Hyperf, **DON'T DO LIKE THAT**. Since most objects, including `Controller`, exist as `Singleton`, which is also for better reuse of objects, and request data are stored at `Context` in coroutine, so **DO NOT** store any request data as a class attribute (non-static properties included).
|
|
|
|
Of course, it's not impossible if you really want to store request data as class attributes. We have noticed that `Request` and `Response` objects are obtained through injecting `Hyperf\HttpServer\Contract\RequestInterface` and `Hyperf\HttpServer\Contract\ResponseInterface` when we trying to get `Request` and `Response`, so the corresponding object is also a singleton. How is the coroutine safe here? Take the `RequestInterface` as an example, when the corresponding `Hyperf\HttpServer\Request` object gets `PSR-7 request object` from its internal, it is obtained from the `Context`. So the actual class used is only a proxy class, and the actual call is obtained from the `Context`.
|