}
	if outputFormat == "yaml" {
		if out, err = yaml.JSONToYAML(out); err != nil {
			return err
		}
	}
	fmt.Fprintln(c.Stdout, string(out))
	return nil

  // +optional
  repeated Subject subjects = 2;

  // RoleRef can only reference a ClusterRole in the global namespace.
  // If the RoleRef cannot be resolved, the Authorizer must return an error.
  optional RoleRef roleRef = 3;
}

// ClusterRoleBindingList is a collection of ClusterRoleBindings.

		t.Run(fmt.Sprintf("Test %d", i+1), func(t *testing.T) {
			var expiration Expiration
			err := xml.Unmarshal([]byte(tc.inputXML), &expiration)
			if err != nil {
				t.Fatalf("%d: %v", i+1, err)
			}

			err = expiration.Validate()
			if err != tc.expectedErr {
				t.Fatalf("%d: got: %v, expected: %v", i+1, err, tc.expectedErr)
			}
		})
	}

{!> ../../docs_src/header_param_models/tutorial002.py!}
```

////

If a client tries to send some **extra headers**, they will receive an **error** response.

For example, if the client tries to send a `tool` header with a value of `plumbus`, they will receive an **error** response telling them that the header parameter `tool` is not allowed:

```json
{
    "detail": [
        {
            "type": "extra_forbidden",

                            "content": {"application/json": {"schema": {}}},
                        },
                        "422": {
                            "description": "Validation Error",
                            "content": {
                                "application/json": {
                                    "schema": {

                            "content": {"application/json": {"schema": {}}},
                        },
                        "422": {
                            "description": "Validation Error",
                            "content": {
                                "application/json": {
                                    "schema": {

		defer cancel()
		if _, err := globalEtcdClient.Get(ctx, "health"); err != nil {
			// etcd unreachable throw an error..
			switch r.Method {
			case http.MethodHead:
				apiErr := toAPIError(r.Context(), err)
				writeResponse(w, apiErr.HTTPStatusCode, nil, mimeNone)
			case http.MethodGet:
				writeErrorResponse(r.Context(), w, toAPIError(r.Context(), err), r.URL)
			}
			return
		}
	}

		return
	}

	config, err := objectlock.ParseObjectLockConfig(r.Body)
	if err != nil {
		apiErr := errorCodes.ToAPIErr(ErrInvalidArgument)
		apiErr.Description = err.Error()
		writeErrorResponse(ctx, w, apiErr, r.URL)
		return
	}

	configData, err := xml.Marshal(config)
	if err != nil {
		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL)
		return
	}

Bei HTTP Basic Auth erwartet die Anwendung einen Header, der einen Benutzernamen und ein Passwort enthält.

Wenn sie diesen nicht empfängt, gibt sie den HTTP-Error 401 „Unauthorized“ zurück.

Und gibt einen Header `WWW-Authenticate` mit dem Wert `Basic` und einem optionalen `realm`-Parameter („Bereich“) zurück.

func (sys *HTTPConsoleLoggerSys) SetNodeName(nodeName string) {
	if !globalIsDistErasure {
		sys.nodeName = ""
		return
	}

	host, err := xnet.ParseHost(globalLocalNodeName)
	if err != nil {
		logger.FatalIf(err, "Unable to start console logging subsystem")
	}

	sys.nodeName = host.Name
}

// HasLogListeners returns true if console log listeners are registered
// for this node or peers