2019-08-28 11:32:35 4925瀏覽
本篇文章扣丁學堂PHP培訓主要是給讀者們分享一下Laravel源碼解析之路由的使用和示例詳解,對Laravel源碼解析感興趣的小伙伴就隨小編來了解一下吧,希望對小伙伴們有幫助。
入口:
Laravel啟動后,會先加載服務提供者、中間件等組件,在查找路由之前因為我們使用的是門面,所以先要查到Route的實體類。
注冊:
第一步當然還是通過服務提供者,因為這是laravel啟動的關鍵,在 RouteServiceProvider 內(nèi)加載路由文件。
首先require是不可缺少的。因路由文件中沒有命名空間。 Illuminate\Routing\Router 下方法
隨后通過路由找到指定方法,依舊是 Illuminate\Routing\Router 內(nèi)有你所使用的所有路由相關方法,例如get、post、put、patch等等,他們都調(diào)用了統(tǒng)一的方法 addRoute
之后通過 Illuminate\Routing\RouteCollection addToCollections 方法添加到集合中
添加后的結果如下圖所示:
protected function mapApiRoutes()
{
Route::prefix('api')
->middleware('api')
->namespace($this->namespace) // 設置所處命名空間
->group(base_path('routes/api.php')); //所得路由文件絕對路徑
}
protected function loadRoutes($routes)
{
if ($routes instanceof Closure) {
$routes($this);
} else {
$router = $this;
require $routes;
}
}
public function addRoute($methods, $uri, $action)
{
return $this->routes->add($this->createRoute($methods, $uri, $action));
}
protected function addToCollections($route)
{
$domainAndUri = $route->getDomain().$route->uri();
foreach ($route->methods() as $method) {
$this->routes[$method][$domainAndUri] = $route;
}
$this->allRoutes[$method.$domainAndUri] = $route;
}
實例化:
依舊通過反射加載路由指定的控制器,這個時候build的參數(shù)$concrete = App\Api\Controllers\XxxController
這時將返回控制器的實例,下面將通過url訪問指定方法,一般控制器都會繼承父類 Illuminate\Routing\Controller ,laravel為其設置了別名 BaseController
Laravel通過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 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);
}
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($parameters));
}
public function callAction($method, $parameters)
{
return call_user_func_array([$this, $method], $parameters);
}
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