/**
* 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)));
}
}
}
/**
* The following is a bit of an integration test to ensure that the CachePlugin honors a
* custom can cache strategy.
*/
public function testIntegrationWithCachePlugin()
{
$c = new CallbackCanCacheStrategy(function ($request) {
return true;
}, function ($response) {
return true;
});
// Make a request and response that have no business being cached
$request = new Request('DELETE', 'http://www.foo.com');
$response = Response::fromMessage("HTTP/1.1 200 OK\r\n" . "Expires: Mon, 26 Jul 1997 05:00:00 GMT\r\n" . "Last-Modified: Wed, 09 Jan 2013 08:48:53 GMT\r\n" . "Content-Length: 2\r\n" . "Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0\r\n\r\n" . "hi");
$this->assertTrue($c->canCacheRequest($request));
$this->assertTrue($c->canCacheResponse($response));
$s = $this->getMockBuilder('Guzzle\\Plugin\\Cache\\DefaultCacheStorage')->setConstructorArgs(array(new DoctrineCacheAdapter(new ArrayCache())))->setMethods(array('fetch'))->getMockForAbstractClass();
$s->expects($this->once())->method('fetch')->will($this->returnValue(array(200, $response->getHeaders(), $response->getBody(true))));
$plugin = new CachePlugin(array('can_cache' => $c, 'storage' => $s));
$plugin->onRequestBeforeSend(new Event(array('request' => $request)));
$this->assertEquals(200, $request->getResponse()->getStatusCode());
$this->assertEquals('hi', $request->getResponse()->getBody(true));
}
public function testCachesResponsesWhenCacheable()
{
$cache = new ArrayCache();
$plugin = new CachePlugin($cache);
$request = new Request('GET', 'http://foo.com');
$response = new Response(200, array(), 'Foo');
$plugin->onRequestBeforeSend(new Event(array('request' => $request)));
$plugin->onRequestSent(new Event(array('request' => $request, 'response' => $response)));
$data = $this->readAttribute($cache, 'data');
$this->assertNotEmpty($data);
}
public function testCachesResponsesWhenCacheable()
{
$cache = new ArrayCache();
$adapter = new DoctrineCacheAdapter($cache);
$plugin = new CachePlugin(array('adapter' => $adapter));
$request = new Request('GET', 'http://foo.com');
$response = new Response(200, array(), 'Foo');
$plugin->onRequestBeforeSend(new Event(array('request' => $request)));
$plugin->onRequestSent(new Event(array('request' => $request, 'response' => $response)));
$data = $this->readAttribute($cache, 'data');
$this->assertNotEmpty($data);
$data = end($data);
$this->assertEquals(200, $data[0]);
$this->assertInternalType('array', $data[1]);
$this->assertEquals('Foo', $data[2]);
}
