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<?php |
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/* |
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* This file is part of the jade/jade package. |
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* |
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* (c) Slince <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Jade; |
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use Jade\Routing\RouteCollector; |
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use Psr\Container\ContainerInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Http\Server\MiddlewareInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use Jade\HttpKernel\HttpKernelProvider; |
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use Jade\Routing\RouteCollection as RouteCollection; |
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use Jade\Routing\Route; |
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use Jade\Middleware\RouteMiddleware; |
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use Zend\Diactoros\ServerRequestFactory; |
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class App extends RouteCollector implements RequestHandlerInterface |
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{ |
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/** |
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* 是否已经初始化 |
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* |
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* @var bool |
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*/ |
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protected $booted = false; |
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/** |
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* @var ContainerInterface |
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*/ |
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protected $container; |
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/** |
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* @var array |
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*/ |
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protected $providers; |
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public function __construct(ContainerInterface $container = null) |
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{ |
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if (null === $container) { |
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$container = new Container(); |
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} |
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// 注册核心服务 |
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$this->container = $container; |
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$this->container['app'] = $this; |
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$this->register(new CoreServiceProvider()); |
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parent::__construct(new RouteCollection()); |
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} |
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/** |
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* 初始化启动工作 |
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*/ |
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public function boot() |
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{ |
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if ($this->booted) { |
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return; |
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} |
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$this->booted = true; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function handle(ServerRequestInterface $request): ResponseInterface |
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{ |
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// 启动应用 |
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$this->boot(); |
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$this->register(new HttpKernelProvider()); |
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// 请求转交给 http kernel |
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return $this->container->get('http_kernel')->handle($request); |
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} |
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/** |
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* 代理http kernel |
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* |
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* @param ServerRequestInterface $request |
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* @param ResponseInterface $response |
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*/ |
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public function terminate(ServerRequestInterface $request, ResponseInterface $response) |
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{ |
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$this->container->get('http_kernel')->terminate($request, $response); |
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} |
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/** |
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* 开启服务, 监听请求 |
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*/ |
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public function serve() |
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{ |
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// 1. 创建请求 |
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$request = ServerRequestFactory::fromGlobals(); |
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// 2. 处理请求 |
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$response = $this->handle($request); |
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// 3. 输出响应 |
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$this->terminate($request, $response); |
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} |
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/** |
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* 注册服务提供者 |
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* |
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* @param object $provider |
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* @param array $values |
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*/ |
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public function register($provider, array $values = []) |
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{ |
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// 注册服务 |
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if ($provider instanceof ServiceProviderInterface) { |
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$provider->register($this->container); |
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} |
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// 注册事件 |
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if ($provider instanceof EventProviderInterface) { |
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$provider->subscribe($this->container->get('event_dispatcher'), $this->container); |
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} |
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$this->container->merge($values); |
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$this->providers[] = $provider; |
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} |
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/** |
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* 获取服务容器 |
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* |
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* @return Container |
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*/ |
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public function getContainer(): Container |
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{ |
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return $this->container; |
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} |
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/** |
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* 添加一个 middleware |
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* |
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* @param string|MiddlewareInterface|callable $middleware |
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* @param Route|null $route 绑定的路由 |
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*/ |
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public function pipe($middleware, Route $route = null) |
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{ |
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$middleware = $this->container->get('middleware_factory')->create($middleware); |
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if (null !== $route) { |
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$middleware = new RouteMiddleware($route, $middleware); |
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} |
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$this->container->get('middleware_pipeline')->pipe( |
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$middleware |
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); |
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} |
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/** |
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* 返回全部的 provider |
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* |
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* @return array |
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*/ |
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public function getProviders() |
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{ |
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return $this->providers; |
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} |
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} |
Let’s assume that you have a directory layout like this:
and let’s assume the following content of
Bar.php
:If both files
OtherDir/Foo.php
andSomeDir/Foo.php
are loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.php
However, as
OtherDir/Foo.php
does not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php
, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: