前言 單純學習
分析 index.php http核心，將傳入的請求傳送到http核心或控制檯核心，得到返回，終止請求
1、make(解析http控制檯例項)
2、handle(處理請求)
3、Illuminate\Http\Request::capture()
4、send
5、terminate
$kernel = $app->make(Illuminate\Contracts\Http\Kernel::class);
//解析這個抽象的例項，在bootstrap/app.php中有註冊單例App\Http\Kernel
$response = $kernel->handle(
$request = Illuminate\Http\Request::capture()//得到全域性表單請求例項
);處理請求得到響應
$response->send();//傳送響應
$kernel->terminate($request, $response)//終止請求分析App\Http\Kernel 檔案
namespace App\Http;
use Illuminate\Foundation\Http\Kernel as HttpKernel;
class Kernel extends HttpKernel
{
忽略
}分析Illuminate\Foundation\Http\Kernel
1. 引入
use Exception;//異常
use Throwable;//異常與錯誤
use Illuminate\Routing\Router;//路由類
use Illuminate\Routing\Pipeline;//路由管道類
use Illuminate\Support\Facades\Facade;//門面抽象類
use Illuminate\Contracts\Debug\ExceptionHandler;//異常處理程式
use Illuminate\Contracts\Foundation\Application;//基礎應用介面
use Illuminate\Contracts\Http\Kernel as KernelContract;//基礎http核心介面
use Symfony\Component\Debug\Exception\FatalThrowableError;2. 成員變數
class Kernel implements KernelContract
{
//應用例項
protected $app
//路由例項
protected $router;
// 應用程式的引導類
protected $bootstrappers = [
\Illuminate\Foundation\Bootstrap\LoadEnvironmentVariables::class,
\Illuminate\Foundation\Bootstrap\LoadConfiguration::class,
\Illuminate\Foundation\Bootstrap\HandleExceptions::class,
\Illuminate\Foundation\Bootstrap\RegisterFacades::class,
\Illuminate\Foundation\Bootstrap\RegisterProviders::class,
\Illuminate\Foundation\Bootstrap\BootProviders::class,
];
//中介軟體陣列
protected $middleware = [];
//中介軟體組陣列
protected $middlewareGroups = [];
//路由中介軟體
protected $routeMiddleware = [];
//*按優先順序排序的中介軟體列表
protected $middlewarePriority = [
\Illuminate\Session\Middleware\StartSession::class,
\Illuminate\View\Middleware\ShareErrorsFromSession::class,
\Illuminate\Auth\Middleware\Authenticate::class,
\Illuminate\Session\Middleware\AuthenticateSession::class,
\Illuminate\Routing\Middleware\SubstituteBindings::class,
\Illuminate\Auth\Middleware\Authorize::class,
];
3 . 建構函式
public function __construct(Application $app, Router $router)//依賴注入
{
$this->app = $app;
$this->router = $router;
$router->middlewarePriority = $this->middlewarePriority;//按優先順序排序的中介軟體列表
foreach ($this->middlewareGroups as $key => $middleware) {
$router->middlewareGroup($key, $middleware);//新增路由中介軟體組
}
foreach ($this->routeMiddleware as $key => $middleware) {
$router->aliasMiddleware($key, $middleware);//新增中介軟體別名
}
}4. 處理傳入的HTTP請求
public function handle($request)
{
try {
//啟用_method請求引數的支援，以確定預期的HTTP方法
$request->enableHttpMethodParameterOverride();
//傳送請求返回響應體
$response = $this->sendRequestThroughRouter($request);
} catch (Exception $e) {
$this->reportException($e);
$response = $this->renderException($request, $e);
} catch (Throwable $e) {
$this->reportException($e = new FatalThrowableError($e));
$response = $this->renderException($request, $e);
}
$this->app['events']->dispatch(
new Events\RequestHandled($request, $response)
);
return $response;
}5. 通過中介軟體/路由器傳送給定的請求
1、bootstrap
2、Facade::clearResolvedInstance
3、send(設定通過管道傳送的物件)
4、through（設定管道陣列）
5、then(執行管道)
6、shouldSkipMiddleware
7、dispatchToRouter(獲取路由排程器回撥)
protected function sendRequestThroughRouter($request)
{
$this->app->instance('request', $request);//註冊請求例項到request
Facade::clearResolvedInstance('request');//清除已解析的門面例項
$this->bootstrap();//執行載入程式
return (new Pipeline($this->app))
->send($request)
->through($this->app->shouldSkipMiddleware() ? [] : $this->middleware)
->then($this->dispatchToRouter());//中介軟體中的$next引數
}6. 為HTTP請求引導應用程式
1、hasBeenBootstrapped
2、bootstrapWith
3、bootstrappers
public function bootstrap()
{
//判斷程式是否自舉
if (! $this->app->hasBeenBootstrapped()) {
$this->app->bootstrapWith($this->bootstrappers());//執行給定的引導類陣列
}
}7. 返回路由排程器回撥（中介軟體中的$next引數）
protected function dispatchToRouter()
{
return function ($request) {
$this->app->instance('request', $request);
return $this->router->dispatch($request);
};
}8. 終止核心
1、terminateMiddleware
2、 $this->app->terminate()
public function terminate($request, $response)
{
$this->terminateMiddleware($request, $response);//終止中介軟體
$this->app->terminate();//終止應用
}9. 終止中介軟體
1、shouldSkipMiddleware
2、gatherRouteMiddleware
3、parseMiddleware
4、make
protected function terminateMiddleware($request, $response)
{
//獲取所有中介軟體
$middlewares = $this->app->shouldSkipMiddleware() ? [] : array_merge(
$this->gatherRouteMiddleware($request),//獲取當前請求的類的中介軟體
$this->middleware//全域性公共中介軟體
);
foreach ($middlewares as $middleware) {
if (! is_string($middleware)) {
continue;
}
[$name] = $this->parseMiddleware($middleware);
$instance = $this->app->make($name);//解析中介軟體例項
if (method_exists($instance, 'terminate')) {
$instance->terminate($request, $response);//執行中介軟體終止方法
}
}
}10. gatherRouteMiddleware
protected function gatherRouteMiddleware($request)
{
if ($route = $request->route()) {
return $this->router->gatherRouteMiddleware($route);//使用解析的類名收集給定路由的中介軟體
}
return [];
}11. 解析中介軟體
protected function parseMiddleware($middleware)
{
[$name, $parameters] = array_pad(explode(':', $middleware, 2), 2, []);
if (is_string($parameters)) {
$parameters = explode(',', $parameters);
}
return [$name, $parameters];
}12. hasMiddleware(是否存在全域性中介軟體)
public function hasMiddleware($middleware)
{
return in_array($middleware, $this->middleware);
}13. 插入新中介軟體到陣列頭部
public function prependMiddleware($middleware)
{
if (array_search($middleware, $this->middleware) === false) {
array_unshift($this->middleware, $middleware);
}
return $this;
}14. 插入新中介軟體到陣列尾部
public function pushMiddleware($middleware)
{
if (array_search($middleware, $this->middleware) === false) {
$this->middleware[] = $middleware;
}
return $this;
}15. bootstrappers（獲得應用載入程式）
protected function bootstrappers()
{
return $this->bootstrappers;
}16. 向異常處理程式報告異常
protected function reportException(Exception $e)
{
$this->app[ExceptionHandler::class]->report($e);
}17. 將異常輸出到響應
protected function renderException($request, Exception $e)
{
return $this->app[ExceptionHandler::class]->render($request, $e);
}18. getMiddlewareGroups
public function getMiddlewareGroups()
{
return $this->middlewareGroups;
}19. getApplication
public function getApplication()
{
return $this->app;
}本作品採用《CC 協議》，轉載必須註明作者和本文連結