laravel - Why can't all routes be opened after using this middleware?

Question

When opening all routes, it shows too many redirects. Why is this?

Route::group([],function(){
    Route::get('/', function () {
        return view('shouye');
    });
    Route::get('/123', array('as'=>'list','uses'=>function () {
        return route('list');
    }));
    Route::get('/456', ['middleware'=>'login','uses'=>function () {
        return 456;
    }]);
});

<?php

namespace App\Http\Middleware;

use Closure;

class LoginMiddleware
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        if(!session('uid')){
            return redirect('/123');
        }
        return $next($request);
    }
}

protected $middleware = [
        \Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode::class,
        \App\Http\Middleware\LoginMiddleware::class,
    ];
    
protected $routeMiddleware = [
        'auth' => \App\Http\Middleware\Authenticate::class,
        'auth.basic' => \Illuminate\Auth\Middleware\AuthenticateWithBasicAuth::class,
        'guest' => \App\Http\Middleware\RedirectIfAuthenticated::class,
        'throttle' => \Illuminate\Routing\Middleware\ThrottleRequests::class,
        'login'=>\App\Http\Middleware\LoginMiddleware::class,
    ];    

Answer 1

The original poster added the LoginMiddleware middleware to the $middleware variable in the Http/Kernel.php file, which means that every request will go through this route;

In this way, the route /123 will be redefined every time; and the request of /123 itself also needs to go through the LoginMiddleware middleware, which is naturally an endless loop;