Laravel源码解析之路由的使用和示例详解
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2023-11-12 19:11:10
前言
我的解析文章并非深层次多领域的解析攻略。但是参考着开发文档看此类文章会让你在日常开发中更上一层楼。
废话不多说,我们开始本章的讲解。
入口
laravel启动...
前言
我的解析文章并非深层次多领域的解析攻略。但是参考着开发文档看此类文章会让你在日常开发中更上一层楼。
废话不多说,我们开始本章的讲解。
入口
laravel启动后,会先加载服务提供者、中间件等组件,在查找路由之前因为我们使用的是门面,所以先要查到route的实体类。
注册
第一步当然还是通过服务提供者,因为这是laravel启动的关键,在 routeserviceprovider
内加载路由文件。
protected function mapapiroutes() { route::prefix('api') ->middleware('api') ->namespace($this->namespace) // 设置所处命名空间 ->group(base_path('routes/api.php')); //所得路由文件绝对路径 }
首先require是不可缺少的。因路由文件中没有命名空间。 illuminate\routing\router
下方法
protected function loadroutes($routes) { if ($routes instanceof closure) { $routes($this); } else { $router = $this; require $routes; } }
随后通过路由找到指定方法,依旧是 illuminate\routing\router
内有你所使用的所有路由相关方法,例如get、post、put、patch等等,他们都调用了统一的方法 addroute
public function addroute($methods, $uri, $action) { return $this->routes->add($this->createroute($methods, $uri, $action)); }
之后通过 illuminate\routing\routecollection
addtocollections 方法添加到集合中
protected function addtocollections($route) { $domainanduri = $route->getdomain().$route->uri(); foreach ($route->methods() as $method) { $this->routes[$method][$domainanduri] = $route; } $this->allroutes[$method.$domainanduri] = $route; }
添加后的结果如下图所示
实例化
依旧通过反射加载路由指定的控制器,这个时候build的参数$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); }
这时将返回控制器的实例,下面将通过url访问指定方法,一般控制器都会继承父类 illuminate\routing\controller
,laravel为其设置了别名 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($parameters)); }
laravel通过controller继承的callaction去调用子类的指定方法,也就是我们希望调用的自定义方法。
public function callaction($method, $parameters) { return call_user_func_array([$this, $method], $parameters); }
致谢
感谢你看到这里,本篇文章源码解析靠个人理解。如有出入请拍砖。
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。