* <a href="https://github.com/OAI/OpenAPI-Specification" class="external-link" target="_blank"><strong>OpenAPI</strong></a> voor het maken van API's, inclusief declaraties van <abbr title="ook bekend als: endpoints, routess">pad</abbr><abbr title="ook bekend als HTTP-methoden, zoals POST, GET, PUT, DELETE">bewerkingen</abbr>, parameters, request bodies, beveiliging, enz.

	// Add server metrics router
	registerMetricsRouter(router)

	// Add STS router always.
	registerSTSRouter(router)

	// Add KMS router
	registerKMSRouter(router)

	// Add API router
	registerAPIRouter(router)

	router.Use(globalMiddlewares...)

	return router, nil

			}
			routes = append(routes, routeTyped)
		}
	}
	if len(routes) == 0 {
		return nil, fmt.Errorf("no routes found")
	}
	sort.Slice(routes, func(i, j int) bool {
		iName, err := strconv.Atoi(routes[i].Name)
		if err != nil {
			return false
		}
		jName, err := strconv.Atoi(routes[j].Name)
		if err != nil {
			return false
		}
		return iName < jName
	})
	return routes, nil
}

func registerAPIRouter(router *mux.Router) {
	// Initialize API.
	api := objectAPIHandlers{
		ObjectAPI: newObjectLayerFn,
	}

	// API Router
	apiRouter := router.PathPrefix(SlashSeparator).Subrouter()

	var routers []*mux.Router
	for _, domainName := range globalDomainNames {
		if IsKubernetes() {

	kmsAPIVersion       = "v1"
	kmsAPIVersionPrefix = SlashSeparator + kmsAPIVersion
)

type kmsAPIHandlers struct{}

// registerKMSRouter - Registers KMS APIs
func registerKMSRouter(router *mux.Router) {
	kmsAPI := kmsAPIHandlers{}
	kmsRouter := router.PathPrefix(kmsPathPrefix).Subrouter()

	KMSVersions := []string{
		kmsAPIVersionPrefix,
	}

	gz, err := gzhttp.NewWrapper(gzhttp.MinSize(1000), gzhttp.CompressionLevel(gzip.BestSpeed))

* Es gibt ein Unterverzeichnis `app/routers/` mit einer weiteren Datei `__init__.py`, es handelt sich also um ein „Python-Subpackage“: `app.routers`.
* Die Datei `app/routers/items.py` befindet sich in einem Package, `app/routers/`, also ist sie ein Submodul: `app.routers.items`.
* Das Gleiche gilt für `app/routers/users.py`, es ist ein weiteres Submodul: `app.routers.users`.

```Python hl_lines="35"
{!../../docs_src/openapi_callbacks/tutorial001.py!}
```

/// tip | "Tipp"

Beachten Sie, dass Sie nicht den Router selbst (`invoices_callback_router`) an `callback=` übergeben, sondern das Attribut `.routes`, wie in `invoices_callback_router.routes`.

///

### Es in der Dokumentation ansehen

type adminAPIHandlers struct{}

// registerAdminRouter - Add handler functions for each service REST API routes.
func registerAdminRouter(router *mux.Router, enableConfigOps bool) {
	adminAPI := adminAPIHandlers{}
	// Admin router
	adminRouter := router.PathPrefix(adminPathPrefix).Subrouter()

	adminVersions := []string{
		adminAPIVersionPrefix,
	}

* There's a subdirectory `app/routers/` with another file `__init__.py`, so it's a "Python subpackage": `app.routers`.
* The file `app/routers/items.py` is inside a package, `app/routers/`, so, it's a submodule: `app.routers.items`.
* The same with `app/routers/users.py`, it's another submodule: `app.routers.users`.

		if err != nil {
			return err
		}
		istiodBytes.WriteString(istiod)
	}
	diff := difflib.UnifiedDiff{
		FromFile: "Istiod Routes",
		A:        difflib.SplitLines(istiodBytes.String()),
		ToFile:   "Envoy Routes",
		B:        difflib.SplitLines(envoyBytes.String()),
		Context:  c.context,
	}
	text, err := difflib.GetUnifiedDiffString(diff)
	if err != nil {
		return err
	}