* **`4XX`** – статус-коды, сообщающие о клиентской ошибке. Это ещё одна наиболее часто используемая категория.
    * Пример – код `404` для статуса "Not Found".
    * Для общих ошибок со стороны клиента можно просто использовать код `400`.

	SYS_MSGSND                       = 4400
	SYS_MSGRCV                       = 4401
	SYS_MSGCTL                       = 4402
	SYS_CLOCK_GETTIME64              = 4403
	SYS_CLOCK_SETTIME64              = 4404
	SYS_CLOCK_ADJTIME64              = 4405
	SYS_CLOCK_GETRES_TIME64          = 4406
	SYS_CLOCK_NANOSLEEP_TIME64       = 4407
	SYS_TIMER_GETTIME64              = 4408
	SYS_TIMER_SETTIME64              = 4409

cd m
cp go.mod go.mod.orig
! go list -m all
stderr '^go: example.com/cmd@v1.1.0-doesnotexist: reading http.*/mod/example.com/cmd/@v/v1.1.0-doesnotexist.info: 404 Not Found\n\tserver response: 404 page not found$'
stderr '^go: example.com/cmd@v1.1.0-doesnotexist: missing go.sum entry for go.mod file; to add it:\n\tgo mod download example.com/cmd$'
go install example.com/cmd/a@latest
cmp go.mod go.mod.orig

	matchers := []match.Matcher{match.RegularPod, match.NotWaypoint}

	gatewayListenPort := 80
	gatewayListenPortName := "http"
	t.RunTraffic(TrafficTestCase{
		name:             "404",
		targetMatchers:   matchers,
		workloadAgnostic: true,
		viaIngress:       true,
		config:           httpGateway("*", gatewayListenPort, gatewayListenPortName, "HTTP", t.Istio.Settings().IngressGatewayIstioLabel),

	SYS_WAIT4_NOCANCEL                 = 400
	SYS_RECVMSG_NOCANCEL               = 401
	SYS_SENDMSG_NOCANCEL               = 402
	SYS_RECVFROM_NOCANCEL              = 403
	SYS_ACCEPT_NOCANCEL                = 404
	SYS_MSYNC_NOCANCEL                 = 405
	SYS_FCNTL_NOCANCEL                 = 406
	SYS_SELECT_NOCANCEL                = 407
	SYS_FSYNC_NOCANCEL                 = 408
	SYS_CONNECT_NOCANCEL               = 409

## Código de Status da Resposta

Você pode definir o `status_code` (HTTP) para ser usado na resposta da sua *operação de rota*.

Você pode passar diretamente o código `int`, como `404`.

Mas se você não se lembrar o que cada código numérico significa, pode usar as constantes de atalho em `status`:

=== "Python 3.8 and above"

    ```Python hl_lines="3  17"

		return err
	}
	return m.podControl.PatchPod(ctx, pod.Namespace, pod.Name, patchBytes)
}

// ReleasePod sends a patch to free the pod from the control of the controller.
// It returns the error if the patching fails. 404 and 422 errors are ignored.
func (m *PodControllerRefManager) ReleasePod(ctx context.Context, pod *v1.Pod) error {
	logger := klog.FromContext(ctx)

			// whether you also have the s3:ListBucket
			// permission.
			// * If you have the s3:ListBucket permission
			//   on the bucket, Amazon S3 will return an
			//   HTTP status code 404 ("no such key")
			//   error.
			// * if you don’t have the s3:ListBucket
			//   permission, Amazon S3 will return an HTTP
			//   status code 403 ("access denied") error.`

				return nil, fmt.Errorf(" You must provide a proxyID in the query string, e.g. [%s]",
					"edsz?proxyID=istio-ingressgateway")

			case strings.Contains(eString, "404 page not found"):
				return HandlerForRetrieveDebugList(kubeClient, *centralOpts, writer, istioNamespace)

			case strings.Contains(eString, "querystring parameter 'resource' is required"):

            // If we throw, an attempt to publish will fail altogether even if we use ResourceExceptions#getMissing(uri).
            if (e.getStatusCode() == 404) {
                return null;
            }
            throw ResourceExceptions.getFailed(uri, e);
        } catch (IOException e) {
            throw ResourceExceptions.getFailed(uri, e);
        }
    }