/**
* @param RequestInterface $request
* @param ResponseInterface $response
* @return CacheEntry|null entry to save, null if can't cache it
*/
protected function getCacheObject(RequestInterface $request, ResponseInterface $response)
{
if (!isset($this->statusAccepted[$response->getStatusCode()])) {
// Don't cache it
return;
}
$cacheControl = new KeyValueHttpHeader($response->getHeader('Cache-Control'));
$varyHeader = new KeyValueHttpHeader($response->getHeader('Vary'));
if ($varyHeader->has('*')) {
// This will never match with a request
return;
}
if ($cacheControl->has('no-store')) {
// No store allowed (maybe some sensitives data...)
return;
}
if ($cacheControl->has('no-cache')) {
// Stale response see RFC7234 section 5.2.1.4
$entry = new CacheEntry($request, $response, new \DateTime('-1 seconds'));
return $entry->hasValidationInformation() ? $entry : null;
}
foreach ($this->ageKey as $key) {
if ($cacheControl->has($key)) {
return new CacheEntry($request, $response, new \DateTime('+' . (int) $cacheControl->get($key) . 'seconds'));
}
}
if ($response->hasHeader('Expires')) {
$expireAt = \DateTime::createFromFormat(\DateTime::RFC1123, $response->getHeaderLine('Expires'));
if ($expireAt !== false) {
return new CacheEntry($request, $response, $expireAt);
}
}
return new CacheEntry($request, $response, new \DateTime('-1 seconds'));
}
/**
* @param ResponseInterface $response
* @return CacheEntry|null entry to save, null if can't cache it
*/
protected function getCacheObject(ResponseInterface $response)
{
if ($response->hasHeader("Cache-Control")) {
$values = new KeyValueHttpHeader($response->getHeader("Cache-Control"));
if ($values->has('no-store')) {
// No store allowed (maybe some sensitives data...)
return null;
}
if ($values->has('no-cache')) {
// Stale response see RFC7234 section 5.2.1.4
$entry = new CacheEntry($response, new \DateTime('-1 seconds'));
return $entry->hasValidationInformation() ? $entry : null;
}
if ($values->has('max-age')) {
return new CacheEntry($response, new \DateTime('+' . $values->get('max-age') . 'seconds'));
}
return new CacheEntry($response, new \DateTime());
}
if ($response->hasHeader("Expires")) {
$expireAt = \DateTime::createFromFormat('D, d M Y H:i:s T', $response->getHeaderLine("Expires"));
if ($expireAt !== FALSE) {
return new CacheEntry($response, $expireAt);
}
}
return new CacheEntry($response, new \DateTime('-1 seconds'));
}
/**
* @param ResponseInterface $response
* @return CacheEntry|null entry to save, null if can't cache it
*/
protected function getCacheObject(ResponseInterface $response)
{
if ($response->hasHeader("Cache-Control")) {
$cacheControlDirectives = $response->getHeader("Cache-Control");
if (in_array("no-store", $cacheControlDirectives)) {
// No store allowed (maybe some sensitives data...)
return null;
}
if (in_array("no-cache", $cacheControlDirectives)) {
// Stale response see RFC7234 section 5.2.1.4
$entry = new CacheEntry($response, new \DateTime('-1 seconds'));
return $entry->hasValidationInformation() ? $entry : null;
}
$matches = [];
if (preg_match('/^max-age=([0-9]*)$/', $response->getHeaderLine("Cache-Control"), $matches)) {
// Handle max-age header
return new CacheEntry($response, new \DateTime('+' . $matches[1] . 'seconds'));
}
}
if ($response->hasHeader("Expires")) {
$expireAt = \DateTime::createFromFormat('D, d M Y H:i:s T', $response->getHeaderLine("Expires"));
if ($expireAt !== FALSE) {
return new CacheEntry($response, $expireAt);
}
}
return new CacheEntry($response, new \DateTime('1 days ago'));
}
/**
* @param ResponseInterface $response
* @param KeyValueHttpHeader $cacheControl
* @return CacheEntry|null
*/
protected function getCacheObjectForCacheControl(ResponseInterface $response, KeyValueHttpHeader $cacheControl)
{
if ($cacheControl->has('no-store')) {
// No store allowed (maybe some sensitives data...)
return null;
}
if ($cacheControl->has('no-cache')) {
// Stale response see RFC7234 section 5.2.1.4
$entry = new CacheEntry($response, new \DateTime('-1 seconds'));
return $entry->hasValidationInformation() ? $entry : null;
}
if ($cacheControl->has('max-age')) {
return new CacheEntry($response, new \DateTime('+' . (int) $cacheControl->get('max-age') . 'seconds'));
}
return new CacheEntry($response, new \DateTime());
}
