本篇文章给大家带来的内容是关于laravel框架下路由的使用（源码解析），有一定的参考价值，有需要的朋友可以参考一下，希望对你有所帮助。

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routerviceprovider内加载路由文件。

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protected function mapapiroutes()

{

route::prefix('api')

->middleware('api')

->namespace($this->namespace) // 设置所处命名空间

->group(ba_path('routes/api.php')); //所得路五大天王由文件绝对路径

}

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

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protected function loadroutes($routes)

{

if ($routes instanceof closure) {

$routes($this);

} el {

$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

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public function addroute($methods, $uri, $action)

{

return $this->routes->add($this->createroute($methods, $uri, $action));

}

之后通过illuminate\routing\routecollectionaddtocollections 方法添加到集合中

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protected function addtocollections($route)

{

$domainanduri = $route->getdomain().$route->uri();

foreach ($route->methods() as $method) {

$this->route上海画室s[$method][$domainanduri] = $route;

}

$this->allroutes[$method.$domainanduri] = $route;

}

添加后的结果如下图所示

调用

通过illuminate\routing\router方法开始运行路由实例化的逻辑

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protected function runroute(request $request, route $route)

{

$request->trouteresolver(function () u ($route) {

return $route;

});

$this->events->disprve的名词atch(new events\routematched($route, $request));

return $this->preparerespon($request,

$this->runroutewithinstack($route, $request)

);

}

....

protected function runroutewithinstack(route $route, request $request)

{

$shouldskipmiddleware = $this->container->bound('middleware.disable') &&

$this->container->make('middleware.disable') === true;

$middleware = $shouldskipmiddleware ? [] : $this->gatherroutemiddleware($route);

return (new pipeline($this->container))

->nd($request)

->through($middleware)

->then(function ($request) u ($route) {

return $this->preparerespon(

$request, $route->run() // 此处调用run方法

);

});

}

在illuminate\routing\route下 run 方用于执行控制器的方法

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public function run()

{

$this->container = $this->container ?: new container;

try {

if ($this->iscontrolleraction()) {

return $this->runcontroller(); //运行一个路由并作出响应

}

return $this->runcallable();

} c财务能力分析atch (httpresponexception $e) {

return $e->getrespon();

}

}

从上述方法内可以看出 runcontroller 是运行路由的关键,方法内运行了一个调度程序，将控制器$this->getcontroller()和控制器方法$this->getcontrollermethod()传入到dispatch调度方法内

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protected function runcontroller()

{

return $this->controllerdispatcher()->dispatch(

$this, $this->getcontroller(), $this->getcontrollermethod()

);

}

这里注意getcontroller()才是真正的将控制器实例化的方法

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public function getcontroller()

{

if (! $this->controller) {

$class = $this->parcontrollercallback()[0]; // 0=>控制器 xxcontroller 1=>方法名 index

$this->controller = $this->container->make(ltrim($class, '\\')); // 交给容器进行反射

}

return $this->controller;

}

实例化

依旧通过反射加载路由指定的控制器,情人歌词这个时候build的参数$concrete =app\api\controllers\xxxcontroller

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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

// ud as resolvers for more fine-tuned resolution of the 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 the 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 u 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 bacontroller

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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。

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public function callaction($method, $parameters)

{

return call_ur_func_array([$this, $method], $parameters);

}