Slim v3 duplicates cache-control header

Question

I have to return a specific cache-control header (Cache-Control: public, max-stale=13910400) but when run this, I get this:

Cache-control has been duplicated, but I only need custom values.

$newResponse = $response->withHeader('Cache-Control', 'public, max-stale=13910400')->withJson($appInfo);
return $newResponse;

I tried this but it doesn't work (just for testing):

$newResponse = $response->withoutHeader('Cache-Control')->withHeader('Cache-Control', 'public, max-stale=13910400')->withJson($appInfo);
return $newResponse;

How can I set the header correctly?

Thank you

Answer 1

I suspect that you might have a middleware problem.

Your code above does produce the correct output.

$app->get('/test', function ($req, $res, $args) {
    header_remove("Cache-Control"); //Edit <--
    $newResponse = $res->withHeader('Cache-Control', 'public, max-stale=13910400')->withJson(["message" => "Test"]);
    return $newResponse;
});

CURL Output

C:\Users\Glenn>curl -X GET -v http://localhost/vms2/public/test

HTTP/1.1 200 OK

Date: Tue, 13 Sep 2016 19:04:42 GMT * Server Apache/2.4.10 (Win32) OpenSSL/1.0.1i PHP/5.6.3 is not blacklisted

Server: Apache/2.4.10 (Win32) OpenSSL/1.0.1i PHP/5.6.3

X-Powered-By: PHP/5.6.3

Set-Cookie: VMS2=2qf14qr1c0eplgfvibi8t2hcd2; path=/

Expires: Thu, 19 Nov 1981 08:52:00 GMT

Pragma: no-cache

Cache-Control: public, max-stale=13910400

Content-Length: 18

Content-Type: application/json;charset=utf-8

{"message":"Test"}

• Connection #0 to host localhost left intact