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($this- namespace) // 设置所处命名空间
- group(base_path('routes/api.php')); //所得路由文件绝对路径
}首先require是不可缺少的。因路由文件中没有命名空间。 IlluminateRoutingRouter 下办法
protected function loadRoutes($routes) { if ($routes instanceof Closure) { $routes($this); } else { $router = $this;require $routes;
}
}
随后通过路由找到指定办法,依旧是 IlluminateRoutingRouter 内有你所使用的所有路由相关办法，例如get、post、put、patch等等，他们都调用了统一的办法 addRoute
public function addRoute(methods, uri, $action)
{
return this- routes- add(this- createRoute(methods, uri, $action));
}之后通过 IlluminateRoutingRouteCollection addToCollections 办法添加到集合中
protected function addToCollections($route)
{
domainAndUri = route- getDomain().$route- uri();foreach (route- methods() as method) {
this- routes[method][domainAndUri] = route;
}
this- allRoutes[method.domainAndUri] = route;
}
添加后的结果如下图所示
实例化
依旧通过反射加载路由指定的控制器,这个时候build的参数concrete = <code>App</code><code>ApiControllersXxxController </code></p><div class="rno-markdown-code"><div class="rno-markdown-code-toolbar"><div class="rno-markdown-code-toolbar-info"><div class="rno-markdown-code-toolbar-item is-type"><span class="is-m-hidden">代码语言：</span>javascript</div></div><div class="rno-markdown-code-toolbar-opt"><div class="rno-markdown-code-toolbar-copy"><i class="icon-copy"></i><span class="is-m-hidden">复制</span></div></div></div><div class="developer-code-block"><pre class="prism-token token line-numbers language-javascript"><code class="language-javascript" style="margin-left:0">public function build(concrete)
{
// If the concrete type is actually a Closure, we will just execute it and
// hand back the results of the functions, which allows functions to be
// used as resolvers for more fine-tuned resolution of these objects.
if ($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访问指定办法，一般控制器都会继承父类 IlluminateRoutingController ,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去调用子类的指定办法，也就是我们希望调用的自定义办法。
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网站事（zalou.cn）。
