Add Cache Control middleware for #3479

app/Http/Middleware/CacheControl.php

@@ -0,0 +1,36 @@
+<?php
+
+/*
+ * This file is part of Cachet.
+ *
+ * (c) Alt Three Services Limited
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace CachetHQ\Cachet\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+
+class CacheControl
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @param  \Closure  $next
+     * @return mixed
+     */
+    public function handle(Request $request, Closure $next)
+    {
+        $response = $next($request);
+
+        $maxAge = time() + 30;
+
+        $response->header('Cache-Control', 'public,max-age='.$maxAge);
+
+        return $response;
+    }
+}