hasHeader('Cache-Control')) { $response->setHeader('Cache-Control', 'public, max-age=86400'); } $response->setHeader('Access-Control-Allow-Origin', '*') // for allowing any domain, insecure ->setHeader('Access-Control-Allow-Headers', '*') // for allowing any headers, insecure ->setHeader('Access-Control-Allow-Methods', 'GET, OPTIONS') // allows GET and OPTIONS methods only ->setHeader('Access-Control-Max-Age', '86400'); } }