Postmark\PostmarkClientBase::processRestRequest PHP Метод

    protected function processRestRequest($method = NULL, $path = NULL, array $body = [])
    {
        $client = $this->getClient();
        $options = [RequestOptions::HTTP_ERRORS => false, RequestOptions::HEADERS => ['User-Agent' => "Postmark-PHP (PHP Version:{$this->version}, OS:{$this->os})", 'Accept' => 'application/json', 'Content-Type' => 'application/json', $this->authorization_header => $this->authorization_token]];
        if (!empty($body)) {
            $cleanParams = array_filter($body, function ($value) {
                return $value !== null;
            });
            switch ($method) {
                case 'GET':
                case 'HEAD':
                case 'DELETE':
                case 'OPTIONS':
                    $options[RequestOptions::QUERY] = $cleanParams;
                    break;
                case 'PUT':
                case 'POST':
                case 'PATCH':
                    $options[RequestOptions::JSON] = $cleanParams;
                    break;
            }
        }
        $response = $client->request($method, $path, $options);
        switch ($response->getStatusCode()) {
            case 200:
                return json_decode($response->getBody(), true);
            case 401:
                $ex = new PostmarkException();
                $ex->message = 'Unauthorized: Missing or incorrect API token in header. ' . 'Please verify that you used the correct token when you constructed your client.';
                $ex->httpStatusCode = 401;
                throw $ex;
            case 500:
                $ex = new PostmarkException();
                $ex->httpStatusCode = 500;
                $ex->message = 'Internal Server Error: This is an issue with Postmark’s servers processing your request. ' . 'In most cases the message is lost during the process, ' . 'and Postmark is notified so that we can investigate the issue.';
                throw $ex;
            case 503:
                $ex = new PostmarkException();
                $ex->httpStatusCode = 503;
                $ex->message = 'The Postmark API is currently unavailable, please try your request later.';
                throw $ex;
                // This should cover case 422, and any others that are possible:
            // This should cover case 422, and any others that are possible:
            default:
                $ex = new PostmarkException();
                $body = json_decode($response->getBody(), true);
                $ex->httpStatusCode = $response->getStatusCode();
                $ex->postmarkApiErrorCode = $body['ErrorCode'];
                $ex->message = $body['Message'];
                throw $ex;
        }
    }