一些Laravel中的代码说明

1.在Controller中函数参数使用Request

首先需要引用Illuminate\Http\Request命名空间，才能使用$request变量

use Illuminate\Http\Request
use dump;
class ProjectController extends Controller
{
    public function index(Request $request) {
        dump($request);
    }
}

也可以在bootstrap/app.php中使用class_alias将Illuminate\Http\Request定义为Request.

// in bootstrap/app.php 
class_alias('Illuminate\Http\Request','Request');

// in controller.php
use Request;
public function index(Request $request) {...}

---

2.Request操作

参考链接

• 验证

 $this->validate($request, [
                'email' => 'required|email|max:255',
                'password' => 'required',
        ]);

• 获得请求字段

- 方式1:
        $order_state = Request::input('order_state');
        $evaluation_state = Request::input('evaluation_state');
        $orderId = $request->input('order_id',1);

- 方式2:
        $request->only('email', 'password');

---

3.Response操作

Response默认使用的类为 Illuminate\Http\Response 当然，也可以实现一个自定义的Response,作为ServiceProvider,注册到容器中。 具体自定义Response,可以查看Lumen-Api这本书。

Response文档 Response详细API

• 基本响应

return (new Response($content, $status))
                  ->header('Content-Type', $value);

return response($content, $status)
                  ->header('Content-Type', $value);

• 标头定义响应

return response($content)
            ->header('Content-Type', $type)
            ->header('X-Header-One', 'Header Value')
            ->header('X-Header-Two', 'Header Value');

• 附加Cookies

return response($content)->header('Content-Type', $type)
                 ->withCookie('name', 'value');

- Cookie的可定义属性
->withCookie($name, $value, $minutes, $path, $domain, $secure, $httpOnly)

• 视图响应

return response()->view('hello', $data)->header('Content-Type', $type);

• JSON响应

return response()->json(['name' => 'Abigail', 'state' => 'CA']);

- JSONP 响应
return response()->json(['name' => 'Abigail', 'state' => 'CA'])
                 ->setCallback($request->input('callback'));

• 文件下载

return response()->download($pathToFile);
return response()->download($pathToFile, $name, $headers);

• 重定向

return redirect('home/dashboard');
// 重定向到某个位置
return back()->withInput();
// 重定向至命名路由
return redirect()->route('login');
// 重定向至路由，路由带有参数
return redirect()->route('profile', [1]);
return redirect()->route('profile', [$user]);
// 重定向至控制器行为
return redirect()->action('HomeController@index');
return redirect()->action('UserController@profile', [1]);

4.注册中间件(Middleware)

中间件的注册，在laravel和Lumen中的方式是不一样的。

• 在Laravel中，通过app/Http/Kernal.php进行注册

protected $middleware = [
        'Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode',
        'Illuminate\Cookie\Middleware\EncryptCookies',
        'Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse',
        'Illuminate\Session\Middleware\StartSession',
        'Illuminate\View\Middleware\ShareErrorsFromSession',
        'App\Http\Middleware\VerifyCsrfToken',
    ];
protected $routeMiddleware = [
        'auth' => 'App\Http\Middleware\Authenticate',
        'auth.basic' => 'Illuminate\Auth\Middleware\AuthenticateWithBasicAuth',
        'guest' => 'App\Http\Middleware\RedirectIfAuthenticated',
    ];

• 而在Lumen中，则是通过bootstrap/app.php注册

$app->middleware([
    App\Http\Middleware\ExampleMiddleware::class
 ]);

 $app->routeMiddleware([
     'auth' => App\Http\Middleware\Authenticate::class,
     'jwt.auth'    => Tymon\JWTAuth\Middleware\GetUserFromToken::class,
     'jwt.refresh' => Tymon\JWTAuth\Middleware\RefreshToken::class,
 ]);

---

5. 服务提供者和服务容器

应用程序通过 bootstrap/app.php 文件中所生成的 Laravel 应用程序实例。 通过调用以下代码，创建应用程序Application的实例app,app中创建了服务容器(loadedProviders).

-- in bootstrap/app.php
$app = new Laravel\Lumen\Application()

-- in Application.php
protected $serviceProviders = array();
protected $loadedProviders = array();
protected $deferredServices = array();
...
$this->registerBaseBindings();
$this->registerBaseServiceProviders();
$this->registerCoreContainerAliases();
...

6.服务的注册(ServiceProvider)

ServiceProvider的注册，在Laravel和Lumen中情况不一样。

• Laravel

Laravel中的服务提供是，都在config/app.php配置文件的providers数组

'providers' => [

        /*
         * Laravel Framework Service Providers...
         */
        'Illuminate\Foundation\Providers\ArtisanServiceProvider',
        'Illuminate\Auth\AuthServiceProvider',
        'Illuminate\Bus\BusServiceProvider',
        'Illuminate\Cache\CacheServiceProvider',
        'Illuminate\Foundation\Providers\ConsoleSupportServiceProvider',
        'Illuminate\Routing\ControllerServiceProvider',
        'App\Providers\AppServiceProvider',
        'App\Providers\BusServiceProvider',
        'App\Providers\ConfigServiceProvider',
        ...
];

• Luemn

Lumen中直接使用register进行注册

$app->register(Tymon\JWTAuth\Providers\JWTAuthServiceProvider::class);
// Dingo API Register
$app->register(Dingo\Api\Provider\LumenServiceProvider::class);
// $app->register(App\Providers\AuthServiceProvider::class);
$app->register(App\Providers\EventServiceProvider::class);