Neos\Flow\Http\Component\TrustedProxiesComponent::getTrustedProxyHeaderValues PHP Method

    protected function getTrustedProxyHeaderValues($type, Request $request)
    {
        $trustedHeaders = isset($this->settings['headers'][$type]) ? $this->settings['headers'][$type] : '';
        if ($trustedHeaders === '' || !$request->getAttribute(Request::ATTRIBUTE_TRUSTED_PROXY)) {
            (yield null);
            return;
        }
        $trustedHeaders = array_map('trim', explode(',', $trustedHeaders));
        foreach ($trustedHeaders as $trustedHeader) {
            if ($request->hasHeader($trustedHeader)) {
                (yield array_map('trim', explode(',', $request->getHeader($trustedHeader))));
            }
        }
        (yield null);
    }