I think you should use:

$response = $next($request);

$response->header->set('Cache-Control' , 'public');
$response->header->set('Last-Modified', new DateTime("now"));
$response->header->set('Expires', new DateTime("tomorrow"));

return $response;

tlorentzen said:

Im trying to remove the Cache-Control: no-cache from my Laravel 5, so i created a middleware to handle this.

if(!$request->is('admin/*')) { $response = $next($request);

   return $response->header('Cache-Control' , 'public')

->header('Last-Modified', new DateTime("now")) ->header('Expires', new DateTime("tomorrow")); }

Sometime the response object is instance of RedirectResponse, and for some reason that does not include a method header, but looking in the Laravel Api it should have the header method. http://laravel.com/api/5.0/Illuminate/Http/RedirectResponse.html

Does the Laravel RedirectResponse not extend the Symfony RedirectResponse? And why does the $next() return the Symfony RedirectResponse and not the Laravel RedirectResponse?

Error: Call to undefined method Symfony\Component\HttpFoundation\RedirectResponse::header()

Anyone know what to do about this?

I have the exact same problem. Did you find a solution?

Try

$response->header->set('Cache-Control' , 'public')

In my case:

$response->headers->set('Access ....

solved problem