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<?php
namespace Illuminate\Foundation\Http;
use Exception;
use Throwable;
use Illuminate\Routing\Router;
use Illuminate\Routing\Pipeline;
use Illuminate\Support\Facades\Facade;
use Illuminate\Contracts\Foundation\Application;
use Illuminate\Contracts\Debug\ExceptionHandler;
use Illuminate\Contracts\Http\Kernel as KernelContract;
use Symfony\Component\Debug\Exception\FatalThrowableError;
class Kernel implements KernelContract
{
/**
* The application implementation.
*
* @var \Illuminate\Contracts\Foundation\Application
*/
protected $app;
/**
* The router instance.
*
* @var \Illuminate\Routing\Router
*/
protected $router;
/**
* The bootstrap classes for the application.
*
* @var array
*/
protected $bootstrappers = [
'Illuminate\Foundation\Bootstrap\DetectEnvironment',
'Illuminate\Foundation\Bootstrap\LoadConfiguration',
'Illuminate\Foundation\Bootstrap\ConfigureLogging',
'Illuminate\Foundation\Bootstrap\HandleExceptions',
'Illuminate\Foundation\Bootstrap\RegisterFacades',
'Illuminate\Foundation\Bootstrap\RegisterProviders',
'Illuminate\Foundation\Bootstrap\BootProviders',
];
/**
* The application's middleware stack.
*
* @var array
*/
protected $middleware = [];
/**
* The application's route middleware groups.
*
* @var array
*/
protected $middlewareGroups = [];
/**
* The application's route middleware.
*
* @var array
*/
protected $routeMiddleware = [];
/**
* Create a new HTTP kernel instance.
*
* @param \Illuminate\Contracts\Foundation\Application $app
* @param \Illuminate\Routing\Router $router
* @return void
*/
public function __construct(Application $app, Router $router)
{
$this->app = $app;
$this->router = $router;
foreach ($this->middlewareGroups as $key => $middleware) {
$router->middlewareGroup($key, $middleware);
}
foreach ($this->routeMiddleware as $key => $middleware) {
$router->middleware($key, $middleware);
}
}
/**
* Handle an incoming HTTP request.
*
* @param \Illuminate\Http\Request $request
* @return \Illuminate\Http\Response
*/
public function handle($request)
{
try {
$request->enableHttpMethodParameterOverride();
$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);
}
$this->app['events']->fire('kernel.handled', [$request, $response]);
return $response;
}
/**
* Send the given request through the middleware / router.
*
* @param \Illuminate\Http\Request $request
* @return \Illuminate\Http\Response
*/
protected function sendRequestThroughRouter($request)
{
$this->app->instance('request', $request);
Facade::clearResolvedInstance('request');
$this->bootstrap();
return (new Pipeline($this->app))
->send($request)
->through($this->app->shouldSkipMiddleware() ? [] : $this->middleware)
->then($this->dispatchToRouter());
}
/**
* Call the terminate method on any terminable middleware.
*
* @param \Illuminate\Http\Request $request
* @param \Illuminate\Http\Response $response
* @return void
*/
public function terminate($request, $response)
{
$middlewares = $this->app->shouldSkipMiddleware() ? [] : array_merge(
$this->gatherRouteMiddlewares($request),
$this->middleware
);
foreach ($middlewares as $middleware) {
list($name, $parameters) = $this->parseMiddleware($middleware);
$instance = $this->app->make($name);
if (method_exists($instance, 'terminate')) {
$instance->terminate($request, $response);
}
}
$this->app->terminate();
}
/**
* Gather the route middleware for the given request.
*
* @param \Illuminate\Http\Request $request
* @return array
*/
protected function gatherRouteMiddlewares($request)
{
if ($route = $request->route()) {
return $this->router->gatherRouteMiddlewares($route);
}
return [];
}
/**
* Parse a middleware string to get the name and parameters.
*
* @param string $middleware
* @return array
*/
protected function parseMiddleware($middleware)
{
list($name, $parameters) = array_pad(explode(':', $middleware, 2), 2, []);
if (is_string($parameters)) {
$parameters = explode(',', $parameters);
}
return [$name, $parameters];
}
/**
* Add a new middleware to beginning of the stack if it does not already exist.
*
* @param string $middleware
* @return $this
*/
public function prependMiddleware($middleware)
{
if (array_search($middleware, $this->middleware) === false) {
array_unshift($this->middleware, $middleware);
}
return $this;
}
/**
* Add a new middleware to end of the stack if it does not already exist.
*
* @param string $middleware
* @return $this
*/
public function pushMiddleware($middleware)
{
if (array_search($middleware, $this->middleware) === false) {
$this->middleware[] = $middleware;
}
return $this;
}
/**
* Bootstrap the application for HTTP requests.
*
* @return void
*/
public function bootstrap()
{
if (! $this->app->hasBeenBootstrapped()) {
$this->app->bootstrapWith($this->bootstrappers());
}
}
/**
* Get the route dispatcher callback.
*
* @return \Closure
*/
protected function dispatchToRouter()
{
return function ($request) {
$this->app->instance('request', $request);
return $this->router->dispatch($request);
};
}
/**
* Determine if the kernel has a given middleware.
*
* @param string $middleware
* @return bool
*/
public function hasMiddleware($middleware)
{
return in_array($middleware, $this->middleware);
}
/**
* Get the bootstrap classes for the application.
*
* @return array
*/
protected function bootstrappers()
{
return $this->bootstrappers;
}
/**
* Report the exception to the exception handler.
*
* @param \Exception $e
* @return void
*/
protected function reportException(Exception $e)
{
$this->app[ExceptionHandler::class]->report($e);
}
/**
* Render the exception to a response.
*
* @param \Illuminate\Http\Request $request
* @param \Exception $e
* @return \Symfony\Component\HttpFoundation\Response
*/
protected function renderException($request, Exception $e)
{
return $this->app[ExceptionHandler::class]->render($request, $e);
}
/**
* Get the Laravel application instance.
*
* @return \Illuminate\Contracts\Foundation\Application
*/
public function getApplication()
{
return $this->app;
}
}
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