public function revalidate(RequestInterface $request, Response $response)
{
try {
$revalidate = $this->createRevalidationRequest($request, $response);
$validateResponse = $revalidate->send();
if ($validateResponse->getStatusCode() == 200) {
return $this->handle200Response($request, $validateResponse);
} elseif ($validateResponse->getStatusCode() == 304) {
return $this->handle304Response($request, $validateResponse, $response);
}
} catch (CurlException $e) {
return $this->plugin->canResponseSatisfyFailedRequest($request, $response);
} catch (BadResponseException $e) {
$this->handleBadResponse($e);
}
// Other exceptions encountered in the revalidation request are ignored
// in hopes that sending a request to the origin server will fix it
return false;
}
/**
* This is a very hacked way to listen for a cURL timeout.
* and serve a cached response from stale cache.
*
* The Guzzle\Plugin\Cache\CachePlugin::onBeforeRequestSend event listener
* method is called manually to allow the plugin to set the cached response.
*
* @param Event $event
*/
public function onRequestException(Event $event)
{
$exception = $event['exception'];
/** @var \Guzzle\Http\Message\Request $request */
$request =& $event['request'];
if (!$request) {
return;
}
$cacheControl = $request->getHeader('Cache-Control');
// Make sure the response can satisfy a request manually before proceeding.
if ($exception instanceof CurlException && $exception->getErrorNo() === CURLE_OPERATION_TIMEOUTED && $this->guzzleCachePlugin->canResponseSatisfyFailedRequest($event['request'], new Response(408))) {
if ($cacheControl && $cacheControl->hasDirective('max-age') && $cacheControl->hasDirective('stale-if-error')) {
// Hack the max-age so the CachePlugin will accept the request as cacheable.
$cacheControl->addDirective('max-age', $this->getConfig('stale-if-error'));
$this->guzzleCachePlugin->onRequestBeforeSend(new Event(array('request' => $request)));
}
}
}
/**
* @dataProvider satisfyFailedProvider
*/
public function testChecksIfResponseCanSatisfyFailedRequest($request, $response, $can)
{
$plugin = new CachePlugin();
$this->assertEquals($can, $plugin->canResponseSatisfyFailedRequest($request, $response));
}
