public function fetch(RequestInterface $request)
{
$key = $this->getCacheKey($request);
if (!($entries = $this->cache->fetch($key))) {
return null;
}
$match = null;
$headers = $this->persistHeaders($request);
$entries = unserialize($entries);
foreach ($entries as $index => $entry) {
if ($this->requestsMatch(isset($entry[1]['vary']) ? $entry[1]['vary'] : '', $headers, $entry[0])) {
$match = $entry;
break;
}
}
if (!$match) {
return null;
}
// Ensure that the response is not expired
$response = null;
if ($match[4] < time()) {
$response = -1;
} else {
$response = new Response($match[2], $match[1]);
if ($match[3]) {
if ($body = $this->cache->fetch($match[3])) {
$response->setBody($body);
} else {
// The response is not valid because the body was somehow deleted
$response = -1;
}
}
}
if ($response === -1) {
// Remove the entry from the metadata and update the cache
unset($entries[$index]);
if ($entries) {
$this->cache->save($key, serialize($entries));
} else {
$this->cache->delete($key);
}
return null;
}
return $response;
}
