Kelunik\Acme\AcmeService::doPollForChallenge PHP Méthode

    private function doPollForChallenge($location)
    {
        if (!is_string($location)) {
            throw new InvalidArgumentException(sprintf("\$location must be of type string, %s given.", gettype($location)));
        }
        do {
            /** @var Response $response */
            $response = (yield $this->acmeClient->get($location));
            $data = json_decode($response->getBody());
            if ($data->status === "pending") {
                if (!$response->hasHeader("retry-after")) {
                    // throw new AcmeException("Protocol Violation: No Retry-After Header!");
                    (yield new Pause(1000));
                    continue;
                }
                $waitTime = $this->parseRetryAfter(current($response->getHeader("retry-after")));
                $waitTime = max($waitTime, 1);
                (yield new Pause($waitTime * 1000));
                continue;
            } elseif ($data->status === "invalid") {
                throw new AcmeException("Challenge marked as invalid!");
            } elseif ($data->status === "valid") {
                break;
            } else {
                throw new AcmeException("Invalid challenge status: {$data->status}.");
            }
        } while (1);
    }