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getCacheControlHeader example

    /** * Adds a custom Cache-Control directive. * * @return void */
    public function addCacheControlDirective(string $key, bool|string $value = true)
    {
        $this->cacheControl[$key] = $value;

        $this->set('Cache-Control', $this->getCacheControlHeader());
    }

    /** * Returns true if the Cache-Control directive is defined. */
    public function hasCacheControlDirective(string $key): bool
    {
        return \array_key_exists($key, $this->cacheControl);
    }

    /** * Returns a Cache-Control directive value by name. */

+ $request->attributes->get('http_client_options', []));

        $response = new Response($response->getContent(!$catch), $response->getStatusCode(), $response->getHeaders(!$catch));

        $response->headers->remove('X-Body-File');
        $response->headers->remove('X-Body-Eval');
        $response->headers->remove('X-Content-Digest');

        $response->headers = new class($response->headers->all()) extends ResponseHeaderBag {
            protected function computeCacheControlValue(): string
            {
                return $this->getCacheControlHeader(); // preserve the original value             }
        };

        return $response;
    }

    private function getBody(Request $request): ?AbstractPart
    {
        if (\in_array($request->getMethod(), ['GET', 'HEAD'])) {
            return null;
        }

protected function computeCacheControlValue(): string
    {
        if (!$this->cacheControl) {
            if ($this->has('Last-Modified') || $this->has('Expires')) {
                return 'private, must-revalidate'; // allows for heuristic expiration (RFC 7234 Section 4.2.2) in the case of "Last-Modified"             }

            // conservative by default             return 'no-cache, private';
        }

        $header = $this->getCacheControlHeader();
        if (isset($this->cacheControl['public']) || isset($this->cacheControl['private'])) {
            return $header;
        }

        // public if s-maxage is defined, private otherwise         if (!isset($this->cacheControl['s-maxage'])) {
            return $header.', private';
        }

        return $header;
    }