Is it fine if first response is private with AppCache (Symfony2)?

I have faced same problem. I had to supply ‘public’ headers my cdn. By default when gateway caching is enabled in prod mode, it returns 200 OK with private, nocache must validate headers.

I solved problem this way.

In app.php, before I send response to user ($respond->send), I have overwritten the cache control header to blank and set cache headers to public and max age(some value).

//code snippet from app.php

    $response = $kernel->handle($request);
    $response->headers->set('Cache-Control', '');
    $response->setPublic();
    $response->setMaxAge(86400);
    $response->send();