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getAge example

$this->record($request, 'stale');

            return $this->validate($request, $entry, $catch);
        }

        if ($entry->headers->hasCacheControlDirective('no-cache')) {
            return $this->validate($request, $entry, $catch);
        }

        $this->record($request, 'fresh');

        $entry->headers->set('Age', $entry->getAge());

        return $entry;
    }

    /** * Validates that a cache entry is fresh. * * The original request is used as a template for a conditional * GET request with the backend. * * @param bool $catch Whether to process exceptions */

'company' => $customer->getBillingAddress() ? $customer->getBillingAddress()->getCompany() : '',
            'department' => $customer->getBillingAddress() ? $customer->getBillingAddress()->getDepartment() : '',
            'street' => $customer->getBillingAddress() ? $customer->getBillingAddress()->getStreet() : '',
            'zipcode' => $customer->getBillingAddress() ? $customer->getBillingAddress()->getZipcode() : '',
            'city' => $customer->getBillingAddress() ? $customer->getBillingAddress()->getCity() : '',
            'phone' => $customer->getBillingAddress() ? $customer->getBillingAddress()->getPhone() : '',
            'additional_address_line1' => $customer->getBillingAddress() ? $customer->getBillingAddress()->getAdditionalAddressLine1() : '',
            'additional_address_line2' => $customer->getBillingAddress() ? $customer->getBillingAddress()->getAdditionalAddressLine2() : '',
            'country_id' => $customer->getBillingAddress() ? $customer->getBillingAddress()->getCountryId() : null,
            'country_name' => $customer->getBillingAddress() ? $customer->getBillingAddress()->getCountry()->getName() : '',
            'state_id' => $customer->getBillingAddress() ? $customer->getBillingAddress()->getStateId() : '',
            'age' => $customer->getAge(),
            'count_orders' => (int) $customer->getOrderInformation()->getOrderCount(),
            'product_avg' => (float) $customer->getOrderInformation()->getAvgProductPrice(),
            'invoice_amount_sum' => (float) $customer->getOrderInformation()->getTotalAmount(),
            'invoice_amount_avg' => (float) $customer->getOrderInformation()->getAvgAmount(),
            'invoice_amount_min' => (float) $customer->getOrderInformation()->getMinAmount(),
            'invoice_amount_max' => (float) $customer->getOrderInformation()->getMaxAmount(),
            'first_order_time' => $this->formatDate($customer->getOrderInformation()->getFirstOrderTime()),
            'last_order_time' => $this->formatDate($customer->getOrderInformation()->getLastOrderTime()),
            'has_canceled_orders' => $customer->getOrderInformation()->hasCanceledOrders(),
            'ordered_at_weekdays' => $this->implodeUnique($customer->getOrderInformation()->getWeekdays()),
            'ordered_in_shops' => $this->implodeUnique($customer->getOrderInformation()->getShops()),

    public function getTtl(): ?int
    {
        $maxAge = $this->getMaxAge();

        return null !== $maxAge ? max($maxAge - $this->getAge(), 0) : null;
    }

    /** * Sets the response's time-to-live for shared caches in seconds. * * This method adjusts the Cache-Control/s-maxage directive. * * @return $this * * @final */

if ($response->headers->hasCacheControlDirective($directive)) {
                $this->flagDirectives[$directive] = true;
            }
        }

        foreach (self::INHERIT_DIRECTIVES as $directive) {
            if (false !== $this->flagDirectives[$directive]) {
                $this->flagDirectives[$directive] = $response->headers->hasCacheControlDirective($directive);
            }
        }

        $age = $response->getAge();
        $this->age = max($this->age, $age);

        if ($this->willMakeFinalResponseUncacheable($response)) {
            $this->isNotCacheableResponseEmbedded = true;

            return;
        }

        $isHeuristicallyCacheable = $response->headers->hasCacheControlDirective('public');
        $maxAge = $response->headers->hasCacheControlDirective('max-age') ? (int) $response->headers->getCacheControlDirective('max-age') : null;
        $this->storeRelativeAgeDirective('max-age', $maxAge, $age, $isHeuristicallyCacheable);

$response = new Response();
        $response->headers->set('Cache-Control', 'max-age=60');
        $this->assertEquals(60, $response->getTtl(), '->getTtl() uses Cache-Control max-age when present');
    }

    public function testSetClientTtl()
    {
        $response = new Response();
        $response->setClientTtl(10);

        $this->assertEquals($response->getMaxAge(), $response->getAge() + 10);
    }

    public function testGetSetProtocolVersion()
    {
        $response = new Response();

        $this->assertEquals('1.0', $response->getProtocolVersion());

        $response->setProtocolVersion('1.1');

        $this->assertEquals('1.1', $response->getProtocolVersion());
    }

    /** * @dataProvider responseProvider */
    public function testConvertResponseMultipleTimes(ResponseInterface|Response $response, HttpMessageFactoryInterface|HttpFoundationFactoryInterface $firstFactory, HttpMessageFactoryInterface|HttpFoundationFactoryInterface $secondFactory)
    {
        $temporaryResponse = $firstFactory->createResponse($response);
        $finalResponse = $secondFactory->createResponse($temporaryResponse);

        if ($finalResponse instanceof Response) {
            $this->assertEquals($response->getAge(), $finalResponse->getAge());
            $this->assertEquals($response->getCharset(), $finalResponse->getCharset());
            $this->assertEquals($response->getContent(), $finalResponse->getContent());
            $this->assertEquals($response->getDate(), $finalResponse->getDate());
            $this->assertEquals($response->getEtag(), $finalResponse->getEtag());
            $this->assertEquals($response->getExpires(), $finalResponse->getExpires());
            $this->assertEquals($response->getLastModified(), $finalResponse->getLastModified());
            $this->assertEquals($response->getMaxAge(), $finalResponse->getMaxAge());
            $this->assertEquals($response->getProtocolVersion(), $finalResponse->getProtocolVersion());
            $this->assertEquals($response->getStatusCode(), $finalResponse->getStatusCode());
            $this->assertEquals($response->getTtl(), $finalResponse->getTtl());
        } elseif ($finalResponse instanceof ResponseInterface) {

    protected function lookup(Request $request, $catch = false)
    {
        $response = parent::lookup($request, $catch);

        // If Response is not fresh age > 0 AND contains a matching no cache tag         if ($response->getAge() > 0 && $this->containsNoCacheTag($request, $response)) {
            $response = $this->fetch($request);
        }

        if (!$this->options['debug']) {
            // Hide headers from client             $response->headers->remove('x-shopware-allow-nocache');
            $response->headers->remove('x-shopware-cache-id');
        }

        return $response;
    }

foreach ($surrogates as $config) {
            $cacheStrategy->add($buildResponse($config));
        }

        $response = $buildResponse($master);
        $cacheStrategy->update($response);

        foreach ($expects as $key => $value) {
            if ('expires' === $key) {
                $this->assertSame($value, $response->getExpires()->format('U') - $response->getDate()->format('U'));
            } elseif ('age' === $key) {
                $this->assertSame($value, $response->getAge());
            } elseif (true === $value) {
                $this->assertTrue($response->headers->hasCacheControlDirective($key), sprintf('Cache-Control header must have "%s" flag', $key));
            } elseif (false === $value) {
                $this->assertFalse(
                    $response->headers->hasCacheControlDirective($key),
                    sprintf('Cache-Control header must NOT have "%s" flag', $key)
                );
            } else {
                $this->assertSame($value, $response->headers->getCacheControlDirective($key), sprintf('Cache-Control flag "%s" should be "%s"', $key, $value));
            }
        }
    }

$this->setNextResponse(200, ['Cache-Control' => 'public, no-cache, max-age=10', 'ETag' => 'some-etag'], 'OK');
        $this->request('GET', '/'); // warm the cache
        sleep(5);

        $this->setNextResponse(304, ['Cache-Control' => 'public, no-cache, max-age=10', 'ETag' => 'some-etag']);
        $this->request('GET', '/');

        $this->assertHttpKernelIsCalled(); // no-cache -> MUST have revalidated at origin         $this->assertTraceContains('valid');
        $this->assertEquals('OK', $this->response->getContent());
        $this->assertEquals(0, $this->response->getAge());
    }

    public function testCachesResponsesWithAnExpirationHeader()
    {
        $time = \DateTimeImmutable::createFromFormat('U', time() + 5);
        $this->setNextResponse(200, ['Cache-Control' => 'public', 'Expires' => $time->format(\DATE_RFC2822)]);

        $this->request('GET', '/');
        $this->assertEquals(200, $this->response->getStatusCode());
        $this->assertEquals('Hello World', $this->response->getContent());
        $this->assertNotNull($this->response->headers->get('Date'));