這篇文章將為大家詳細(xì)講解有關(guān)Laravel中如何使用路由,文章內(nèi)容質(zhì)量較高,因此小編分享給大家做個(gè)參考,希望大家閱讀完這篇文章后對(duì)相關(guān)知識(shí)有一定的了解。
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Laravel啟動(dòng)后,會(huì)先加載服務(wù)提供者、中間件等組件,在查找路由之前因?yàn)槲覀兪褂玫氖情T面,所以先要查到Route的實(shí)體類。
注冊(cè)
第一步當(dāng)然還是通過(guò)服務(wù)提供者,因?yàn)檫@是laravel啟動(dòng)的關(guān)鍵,在RouteServiceProvider
內(nèi)加載路由文件。
protected function mapApiRoutes() { Route::prefix('api') ->middleware('api') ->namespace($this->namespace) // 設(shè)置所處命名空間 ->group(base_path('routes/api.php')); //所得路由文件絕對(duì)路徑 }
首先require是不可缺少的。因路由文件中沒(méi)有命名空間。Illuminate\Routing\Router
下方法
protected function loadRoutes($routes) { if ($routes instanceof Closure) { $routes($this); } else { $router = $this; require $routes; } }
隨后通過(guò)路由找到指定方法,依舊是 Illuminate\Routing\Router
內(nèi)有你所使用的所有路由相關(guān)方法,例如get、post、put、patch等等,他們都調(diào)用了統(tǒng)一的方法addRoute
public function addRoute($methods, $uri, $action) { return $this->routes->add($this->createRoute($methods, $uri, $action)); }
之后通過(guò)Illuminate\Routing\RouteCollection
addToCollections 方法添加到集合中
protected function addToCollections($route) { $domainAndUri = $route->getDomain().$route->uri(); foreach ($route->methods() as $method) { $this->routes[$method][$domainAndUri] = $route; } $this->allRoutes[$method.$domainAndUri] = $route; }
添加后的結(jié)果如下圖所示
實(shí)例化
依舊通過(guò)反射加載路由指定的控制器,這個(gè)時(shí)候build的參數(shù)$concrete =App\Api\Controllers\XxxController
public function build($concrete) { // If the concrete type is actually a Closure, we will just execute it and // hand back the results of the functions, which allows functions to be // used as resolvers for more fine-tuned resolution of these objects. if ($concrete instanceof Closure) { return $concrete($this, $this->getLastParameterOverride()); } $reflector = new ReflectionClass($concrete); // If the type is not instantiable, the developer is attempting to resolve // an abstract type such as an Interface of Abstract Class and there is // no binding registered for the abstractions so we need to bail out. if (! $reflector->isInstantiable()) { return $this->notInstantiable($concrete); } $this->buildStack[] = $concrete; $constructor = $reflector->getConstructor(); // If there are no constructors, that means there are no dependencies then // we can just resolve the instances of the objects right away, without // resolving any other types or dependencies out of these containers. if (is_null($constructor)) { array_pop($this->buildStack); return new $concrete; } $dependencies = $constructor->getParameters(); // Once we have all the constructor's parameters we can create each of the // dependency instances and then use the reflection instances to make a // new instance of this class, injecting the created dependencies in. $instances = $this->resolveDependencies( $dependencies ); array_pop($this->buildStack); return $reflector->newInstanceArgs($instances); }
這時(shí)將返回控制器的實(shí)例,下面將通過(guò)url訪問(wèn)指定方法,一般控制器都會(huì)繼承父類Illuminate\Routing\Controller
,laravel為其設(shè)置了別名 BaseController
public function dispatch(Route $route, $controller, $method) { $parameters = $this->resolveClassMethodDependencies( $route->parametersWithoutNulls(), $controller, $method ); if (method_exists($controller, 'callAction')) { return $controller->callAction($method, $parameters); } return $controller->{$method}(...array_values($parameters)); }
Laravel通過(guò)controller繼承的callAction去調(diào)用子類的指定方法,也就是我們希望調(diào)用的自定義方法。
public function callAction($method, $parameters) { return call_user_func_array([$this, $method], $parameters); }
關(guān)于Laravel中如何使用路由就分享到這里了,希望以上內(nèi)容可以對(duì)大家有一定的幫助,可以學(xué)到更多知識(shí)。如果覺(jué)得文章不錯(cuò),可以把它分享出去讓更多的人看到。
本文標(biāo)題:Laravel中如何使用路由-創(chuàng)新互聯(lián)
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