Nelmio\SecurityBundle\EventListener\ContentSecurityPolicyListener::buildHeaders PHP Метод

    private function buildHeaders(Request $request, DirectiveSet $directiveSet, $reportOnly, $compatHeaders, array $signatures = null)
    {
        // $signatures might be null if no KernelEvents::REQUEST has been triggered.
        // for instance if a security.authentication.failure has been dispatched
        $headerValue = $directiveSet->buildHeaderValue($request, $signatures);
        if (!$headerValue) {
            return array();
        }
        $hn = function ($name) use($reportOnly) {
            return $name . ($reportOnly ? '-Report-Only' : '');
        };
        $headers = array($hn('Content-Security-Policy') => $headerValue);
        if ($compatHeaders) {
            $headers[$hn('X-Content-Security-Policy')] = $headerValue;
        }
        return $headers;
    }