public static function setObjectACL($key, $bucket, $acl = 'public-read')
    {
        $s3c = self::getS3C();
        if ($s3c->doesObjectExist($bucket, $key)) {
            $result = $s3c->putObjectAcl(array(
                'ACL' => $acl,
                'Bucket' => $bucket,
                'Key' => $key,
            ));
            if ($result) {
                return true;
            }
        }

        return false;
    }