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<?php
namespace Illuminate\Foundation\Http\Middleware;
use Closure;
use Illuminate\Contracts\Foundation\Application;
use Illuminate\Foundation\Http\MaintenanceModeBypassCookie;
use Symfony\Component\HttpKernel\Exception\HttpException;
class PreventRequestsDuringMaintenance
{
/**
* The application implementation.
*
* @var \Illuminate\Contracts\Foundation\Application
*/
protected $app;
/**
* The URIs that should be accessible while maintenance mode is enabled.
*
* @var array
*/
protected $except = [];
/**
* Create a new middleware instance.
*
* @param \Illuminate\Contracts\Foundation\Application $app
* @return void
*/
public function __construct(Application $app)
{
$this->app = $app;
}
/**
* Handle an incoming request.
*
* @param \Illuminate\Http\Request $request
* @param \Closure $next
* @return mixed
*
* @throws \Symfony\Component\HttpKernel\Exception\HttpException
*/
public function handle($request, Closure $next)
{
if ($this->app->isDownForMaintenance()) {
$data = json_decode(file_get_contents($this->app->storagePath().'/framework/down'), true);
if (isset($data['secret']) && $request->path() === $data['secret']) {
return $this->bypassResponse($data['secret']);
}
if ($this->hasValidBypassCookie($request, $data) ||
$this->inExceptArray($request)) {
return $next($request);
}
if (isset($data['redirect'])) {
$path = $data['redirect'] === '/'
? $data['redirect']
: trim($data['redirect'], '/');
if ($request->path() !== $path) {
return redirect($path);
}
}
if (isset($data['template'])) {
return response(
$data['template'],
$data['status'] ?? 503,
$this->getHeaders($data)
);
}
throw new HttpException(
$data['status'] ?? 503,
'Service Unavailable',
null,
$this->getHeaders($data)
);
}
return $next($request);
}
/**
* Determine if the incoming request has a maintenance mode bypass cookie.
*
* @param \Illuminate\Http\Request $request
* @param array $data
* @return bool
*/
protected function hasValidBypassCookie($request, array $data)
{
return isset($data['secret']) &&
$request->cookie('laravel_maintenance') &&
MaintenanceModeBypassCookie::isValid(
$request->cookie('laravel_maintenance'),
$data['secret']
);
}
/**
* Determine if the request has a URI that should be accessible in maintenance mode.
*
* @param \Illuminate\Http\Request $request
* @return bool
*/
protected function inExceptArray($request)
{
foreach ($this->except as $except) {
if ($except !== '/') {
$except = trim($except, '/');
}
if ($request->fullUrlIs($except) || $request->is($except)) {
return true;
}
}
return false;
}
/**
* Redirect the user back to the root of the application with a maintenance mode bypass cookie.
*
* @param string $secret
* @return \Illuminate\Http\RedirectResponse
*/
protected function bypassResponse(string $secret)
{
return redirect('/')->withCookie(
MaintenanceModeBypassCookie::create($secret)
);
}
/**
* Get the headers that should be sent with the response.
*
* @param array $data
* @return array
*/
protected function getHeaders($data)
{
$headers = isset($data['retry']) ? ['Retry-After' => $data['retry']] : [];
if (isset($data['refresh'])) {
$headers['Refresh'] = $data['refresh'];
}
return $headers;
}
}