public function cache(RequestInterface $request, Response $response) { $currentTime = time(); $ttl = $request->getParams()->get('cache.override_ttl') ?: $response->getMaxAge() ?: $this->defaultTtl; if ($cacheControl = $response->getHeader('Cache-Control')) { $stale = $cacheControl->getDirective('stale-if-error'); $ttl += $stale == true ? $ttl : $stale; } // Determine which manifest key should be used $key = $this->getCacheKey($request); $persistedRequest = $this->persistHeaders($request); $entries = array(); if ($manifest = $this->cache->fetch($key)) { // Determine which cache entries should still be in the cache $vary = $response->getVary(); foreach (unserialize($manifest) as $entry) { // Check if the entry is expired if ($entry[4] < $currentTime) { continue; } $entry[1]['vary'] = isset($entry[1]['vary']) ? $entry[1]['vary'] : ''; if ($vary != $entry[1]['vary'] || !$this->requestsMatch($vary, $entry[0], $persistedRequest)) { $entries[] = $entry; } } } // Persist the response body if needed $bodyDigest = null; if ($response->getBody() && $response->getBody()->getContentLength() > 0) { $bodyDigest = $this->getBodyKey($request->getUrl(), $response->getBody()); $this->cache->save($bodyDigest, (string) $response->getBody(), $ttl); } array_unshift($entries, array($persistedRequest, $this->persistHeaders($response), $response->getStatusCode(), $bodyDigest, $currentTime + $ttl)); $this->cache->save($key, serialize($entries)); }
/** * {@inheritdoc} */ public function cache($key, Response $response, $ttl = null) { if ($ttl === null) { $ttl = $this->defaultTtl; } $ttl += $response->getMaxAge(); if ($ttl) { $response->setHeader('X-Guzzle-Cache', "key={$key}; ttl={$ttl}"); // Remove excluded headers from the response (see RFC 2616:13.5.1) foreach ($this->excludeResponseHeaders as $header) { $response->removeHeader($header); } // Add a Date header to the response if none is set (for validation) if (!$response->getDate()) { $response->setHeader('Date', gmdate(ClientInterface::HTTP_DATE)); } $this->cache->save($key, array($response->getStatusCode(), $response->getHeaders()->getAll(), $response->getBody(true)), $ttl); } }
/** * Check if a cache response satisfies a failed request's caching constraints * * @param RequestInterface $request Request to validate * @param Response $response Response to validate * * @return bool */ public function canResponseSatisfyFailedRequest(RequestInterface $request, Response $response) { $reqc = $request->getHeader('Cache-Control'); $resc = $response->getHeader('Cache-Control'); $requestStaleIfError = $reqc ? $reqc->getDirective('stale-if-error') : null; $responseStaleIfError = $resc ? $resc->getDirective('stale-if-error') : null; if (!$requestStaleIfError && !$responseStaleIfError) { return false; } if (is_numeric($requestStaleIfError) && $response->getAge() - $response->getMaxAge() > $requestStaleIfError) { return false; } if (is_numeric($responseStaleIfError) && $response->getAge() - $response->getMaxAge() > $responseStaleIfError) { return false; } return true; }
/** * Check if a cache response satisfies a failed request's caching constraints * * @param RequestInterface $request Request to validate * @param Response $response Response to validate * * @return bool */ public function canResponseSatisfyFailedRequest(RequestInterface $request, Response $response) { $requestStaleIfError = $request->getCacheControlDirective('stale-if-error'); $responseStaleIfError = $response->getCacheControlDirective('stale-if-error'); if (!$requestStaleIfError && !$responseStaleIfError) { return false; } if ($requestStaleIfError !== true && $requestStaleIfError !== null && $response->getAge() - $response->getMaxAge() > $requestStaleIfError) { return false; } if ($responseStaleIfError !== true && $responseStaleIfError !== null && $response->getAge() - $response->getMaxAge() > $responseStaleIfError) { return false; } return true; }