The page isn’t redirecting properly Laravel 5.6 - laravel-5.6

Question

kernel.php
protected $routeMiddleware = [
'auth' => \Illuminate\Auth\Middleware\Authenticate::class,
'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
'bindings' => \Illuminate\Routing\Middleware\SubstituteBindings::class,
'cache.headers' => \Illuminate\Http\Middleware\SetCacheHeaders::class,
'can' => \Illuminate\Auth\Middleware\Authorize::class,
'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
'signed' => \Illuminate\Routing\Middleware\ValidateSignature::class,
'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
'adminauth' => \App\Http\Middleware\AdminAuth::class,
];
web.php
Route::group(['middleware' => 'adminauth'], function() {
//route for admin dashboard
Route::get('/admin', [
'uses' => 'AdminController#dashboard',
'as' => 'dashboard'
]);
//route for admin setting
Route::get('/admin/setting', [
'uses' => 'AdminController#setting'
]);
});
AdminAuth.php
public function handle($request, Closure $next)
{
return redirect('/admin/setting');
//return $next($request);
}
AdminController.php
public function setting() {
$admin = $this->admin;
$notification = $this->notification;
return view('admin/setting')->with(compact(
'admin',
'notification'
));
}
I'm facing this problem i.e., The page isn’t redirecting properly
Firefox has detected that the server is redirecting the request for this address in a way that will never complete.
This problem can sometimes be caused by disabling or refusing to accept cookies.
I read these posts link1, link2, link3 but nothing solves my problem.

Answer 1

The problem is that your admin/setting route uses the adminauth middleware, however your adminauth middleware will redirect to admin/setting if it does not pass.
Just an informative note:
A redirect response is a response with codes between 300-399 and these responses are sent to the browser telling the browser what to do next. Browsers will by default follow redirects and create a new request to the said location.
In your case the browser creates a request to admin/setting the middleware fails and tells the browser to redirect to admin/setting which will do the exact same thing again. Browsers like Firefox have a built-in mechanism to detect this and instead of flooding your server with requests will just stop this loop and let the user know there's a problem.
To solve this you either need to redirect somewhere else or exclude the /admin/setting from the adminauth middleware.
The solution will depend on your application.
A bit more detail as to why Firefox correctly opts to stop the redirects:
According to section 9.1.2 of the HTTP/1.1 protocol the GET request is idempotent i.e.
the side-effects of N > 0 identical requests is the same as for a single request
This is the assumption that browsers use to claim that since a request to X causes a redirect to the same X then this is an infinite redirect and should be stopped.