public function __invoke($retries, AbstractTransferEvent $event)
{
if (!($response = $event->getResponse())) {
return RetrySubscriber::DEFER;
}
if (!$response->hasHeader('x-amz-crc32')) {
return RetrySubscriber::DEFER;
}
$hash = hexdec(Utils::hash($response->getBody(), 'crc32b'));
return (int) $response->getHeader('x-amz-crc32') !== $hash ? RetrySubscriber::RETRY : RetrySubscriber::DEFER;
}
public function setMd5(PreparedEvent $event)
{
$client = $event->getClient();
$command = $event->getCommand();
$body = $event->getRequest()->getBody();
// If ContentMD5 is set or there is no body, there is nothing to do.
if ($command['ContentMD5'] || !$body) {
return;
}
// If and MD5 is required or enabled, add one.
$optional = $client->getConfig('calculate_md5') && in_array($command->getName(), self::$canMd5);
if (in_array($command->getName(), self::$requireMd5) || $optional) {
// Throw exception is calculating and MD5 would result in an error.
if (!$body->isSeekable()) {
throw new CouldNotCreateChecksumException('md5');
}
// Set the Content-MD5 header.
$event->getRequest()->setHeader('Content-MD5', base64_encode(Utils::hash($body, 'md5', true)));
}
}
public function testCalculatesHashSeeksToOriginalPosition()
{
$s = Stream::factory('foobazbar');
$s->seek(4);
$this->assertEquals(md5('foobazbar'), Utils::hash($s, 'md5'));
$this->assertEquals(4, $s->tell());
}
/**
* Create a cache key for a response's body
*
* @param string $url URL of the entry
* @param StreamInterface $body Response body
*
* @return string
*/
private function getBodyKey($url, StreamInterface $body)
{
return $this->keyPrefix . md5($url) . Stream\Utils::hash($body, 'md5');
}
protected function getPayload(RequestInterface $request)
{
// Calculate the request signature payload
if ($request->hasHeader('x-amz-content-sha256')) {
// Handle streaming operations (e.g. Glacier.UploadArchive)
return (string) $request->getHeader('x-amz-content-sha256');
}
if ($body = $request->getBody()) {
if (!$body->isSeekable()) {
throw new CouldNotCreateChecksumException('sha256');
}
return Utils::hash($body, 'sha256');
}
return self::EMPTY_PAYLOAD;
}
