Working on stack.

app/Http/Middleware/MaintenanceMiddleware.php

@@ -0,0 +1,45 @@
+<?php namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Response;
+use Illuminate\Contracts\Routing\Middleware;
+use Illuminate\Contracts\Foundation\Application;
+
+class MaintenanceMiddleware {
+
+	/**
+	 * The application implementation.
+	 *
+	 * @var Application
+	 */
+	protected $app;
+
+	/**
+	 * Create a new filter instance.
+	 *
+	 * @param  Application  $app
+	 * @return void
+	 */
+	public function __construct(Application $app)
+	{
+		$this->app = $app;
+	}
+
+	/**
+	 * Handle an incoming request.
+	 *
+	 * @param  \Symfony\Component\HttpFoundation\Request  $request
+	 * @param  \Closure  $next
+	 * @return \Symfony\Component\HttpFoundation\Response
+	 */
+	public function handle($request, Closure $next)
+	{
+		if ($this->app->isDownForMaintenance())
+		{
+			return new Response('Be right back!', 503);
+		}
+
+		return $next($request);
+	}
+
+}