Esempio n. 1
0
func (a *APIInstaller) registerResourceHandlers(path string, storage rest.Storage, ws *restful.WebService, proxyHandler http.Handler) (*unversioned.APIResource, error) {
	admit := a.group.Admit
	context := a.group.Context

	optionsExternalVersion := a.group.GroupVersion
	if a.group.OptionsExternalVersion != nil {
		optionsExternalVersion = *a.group.OptionsExternalVersion
	}

	var resource, subresource string
	switch parts := strings.Split(path, "/"); len(parts) {
	case 2:
		resource, subresource = parts[0], parts[1]
	case 1:
		resource = parts[0]
	default:
		// TODO: support deeper paths
		return nil, fmt.Errorf("api_installer allows only one or two segment paths (resource or resource/subresource)")
	}
	hasSubresource := len(subresource) > 0

	object := storage.New()
	fqKinds, err := a.group.Typer.ObjectKinds(object)
	if err != nil {
		return nil, err
	}
	// a given go type can have multiple potential fully qualified kinds.  Find the one that corresponds with the group
	// we're trying to register here
	fqKindToRegister := unversioned.GroupVersionKind{}
	for _, fqKind := range fqKinds {
		if fqKind.Group == a.group.GroupVersion.Group {
			fqKindToRegister = fqKind
			break
		}

		// TODO This keeps it doing what it was doing before, but it doesn't feel right.
		if fqKind.Group == extensions.GroupName && fqKind.Kind == "ThirdPartyResourceData" {
			fqKindToRegister = fqKind
			fqKindToRegister.Group = a.group.GroupVersion.Group
			fqKindToRegister.Version = a.group.GroupVersion.Version
		}
	}

	if fqKindToRegister.IsEmpty() {
		return nil, fmt.Errorf("unable to locate fully qualified kind for %v: found %v when registering for %v", reflect.TypeOf(object), fqKinds, a.group.GroupVersion)
	}
	kind := fqKindToRegister.Kind

	versionedPtr, err := a.group.Creater.New(a.group.GroupVersion.WithKind(kind))
	if err != nil {
		return nil, err
	}
	versionedObject := indirectArbitraryPointer(versionedPtr)

	mapping, err := a.group.Mapper.RESTMapping(fqKindToRegister.GroupKind(), a.group.GroupVersion.Version)
	if err != nil {
		return nil, err
	}

	// subresources must have parent resources, and follow the namespacing rules of their parent
	if hasSubresource {
		parentStorage, ok := a.group.Storage[resource]
		if !ok {
			return nil, fmt.Errorf("subresources can only be declared when the parent is also registered: %s needs %s", path, resource)
		}
		parentObject := parentStorage.New()

		parentFQKinds, err := a.group.Typer.ObjectKinds(parentObject)
		if err != nil {
			return nil, err
		}
		// a given go type can have multiple potential fully qualified kinds.  Find the one that corresponds with the group
		// we're trying to register here
		parentFQKindToRegister := unversioned.GroupVersionKind{}
		for _, fqKind := range parentFQKinds {
			if fqKind.Group == a.group.GroupVersion.Group {
				parentFQKindToRegister = fqKind
				break
			}
		}
		if parentFQKindToRegister.IsEmpty() {
			return nil, fmt.Errorf("unable to locate fully qualified kind for %v: found %v when registering for %v", reflect.TypeOf(object), fqKinds, a.group.GroupVersion)
		}

		parentMapping, err := a.group.Mapper.RESTMapping(parentFQKindToRegister.GroupKind(), a.group.GroupVersion.Version)
		if err != nil {
			return nil, err
		}
		mapping.Scope = parentMapping.Scope
	}

	// what verbs are supported by the storage, used to know what verbs we support per path
	creater, isCreater := storage.(rest.Creater)
	namedCreater, isNamedCreater := storage.(rest.NamedCreater)
	lister, isLister := storage.(rest.Lister)
	getter, isGetter := storage.(rest.Getter)
	getterWithOptions, isGetterWithOptions := storage.(rest.GetterWithOptions)
	deleter, isDeleter := storage.(rest.Deleter)
	gracefulDeleter, isGracefulDeleter := storage.(rest.GracefulDeleter)
	collectionDeleter, isCollectionDeleter := storage.(rest.CollectionDeleter)
	updater, isUpdater := storage.(rest.Updater)
	patcher, isPatcher := storage.(rest.Patcher)
	watcher, isWatcher := storage.(rest.Watcher)
	_, isRedirector := storage.(rest.Redirector)
	connecter, isConnecter := storage.(rest.Connecter)
	storageMeta, isMetadata := storage.(rest.StorageMetadata)
	if !isMetadata {
		storageMeta = defaultStorageMetadata{}
	}
	exporter, isExporter := storage.(rest.Exporter)
	if !isExporter {
		exporter = nil
	}

	versionedExportOptions, err := a.group.Creater.New(optionsExternalVersion.WithKind("ExportOptions"))
	if err != nil {
		return nil, err
	}

	if isNamedCreater {
		isCreater = true
	}

	var versionedList interface{}
	if isLister {
		list := lister.NewList()
		listGVK, err := a.group.Typer.ObjectKind(list)
		versionedListPtr, err := a.group.Creater.New(a.group.GroupVersion.WithKind(listGVK.Kind))
		if err != nil {
			return nil, err
		}
		versionedList = indirectArbitraryPointer(versionedListPtr)
	}

	versionedListOptions, err := a.group.Creater.New(optionsExternalVersion.WithKind("ListOptions"))
	if err != nil {
		return nil, err
	}

	var versionedDeleterObject interface{}
	switch {
	case isGracefulDeleter:
		objectPtr, err := a.group.Creater.New(optionsExternalVersion.WithKind("DeleteOptions"))
		if err != nil {
			return nil, err
		}
		versionedDeleterObject = indirectArbitraryPointer(objectPtr)
		isDeleter = true
	case isDeleter:
		gracefulDeleter = rest.GracefulDeleteAdapter{Deleter: deleter}
	}

	versionedStatusPtr, err := a.group.Creater.New(optionsExternalVersion.WithKind("Status"))
	if err != nil {
		return nil, err
	}
	versionedStatus := indirectArbitraryPointer(versionedStatusPtr)
	var (
		getOptions             runtime.Object
		versionedGetOptions    runtime.Object
		getOptionsInternalKind unversioned.GroupVersionKind
		getSubpath             bool
	)
	if isGetterWithOptions {
		getOptions, getSubpath, _ = getterWithOptions.NewGetOptions()
		getOptionsInternalKind, err = a.group.Typer.ObjectKind(getOptions)
		if err != nil {
			return nil, err
		}
		versionedGetOptions, err = a.group.Creater.New(optionsExternalVersion.WithKind(getOptionsInternalKind.Kind))
		if err != nil {
			return nil, err
		}
		isGetter = true
	}

	var (
		connectOptions             runtime.Object
		versionedConnectOptions    runtime.Object
		connectOptionsInternalKind unversioned.GroupVersionKind
		connectSubpath             bool
	)
	if isConnecter {
		connectOptions, connectSubpath, _ = connecter.NewConnectOptions()
		if connectOptions != nil {
			connectOptionsInternalKind, err = a.group.Typer.ObjectKind(connectOptions)
			if err != nil {
				return nil, err
			}

			versionedConnectOptions, err = a.group.Creater.New(optionsExternalVersion.WithKind(connectOptionsInternalKind.Kind))
		}
	}

	var ctxFn ContextFunc
	ctxFn = func(req *restful.Request) api.Context {
		if context == nil {
			return api.NewContext()
		}
		if ctx, ok := context.Get(req.Request); ok {
			return ctx
		}
		return api.NewContext()
	}

	allowWatchList := isWatcher && isLister // watching on lists is allowed only for kinds that support both watch and list.
	scope := mapping.Scope
	nameParam := ws.PathParameter("name", "name of the "+kind).DataType("string")
	pathParam := ws.PathParameter("path", "path to the resource").DataType("string")

	params := []*restful.Parameter{}
	actions := []action{}

	var apiResource unversioned.APIResource
	// Get the list of actions for the given scope.
	switch scope.Name() {
	case meta.RESTScopeNameRoot:
		// Handle non-namespace scoped resources like nodes.
		resourcePath := resource
		resourceParams := params
		itemPath := resourcePath + "/{name}"
		nameParams := append(params, nameParam)
		proxyParams := append(nameParams, pathParam)
		if hasSubresource {
			itemPath = itemPath + "/" + subresource
			resourcePath = itemPath
			resourceParams = nameParams
		}
		apiResource.Name = path
		apiResource.Namespaced = false
		namer := rootScopeNaming{scope, a.group.Linker, gpath.Join(a.prefix, itemPath)}

		// Handler for standard REST verbs (GET, PUT, POST and DELETE).
		// Add actions at the resource path: /api/apiVersion/resource
		actions = appendIf(actions, action{"LIST", resourcePath, resourceParams, namer}, isLister)
		actions = appendIf(actions, action{"POST", resourcePath, resourceParams, namer}, isCreater)
		actions = appendIf(actions, action{"DELETECOLLECTION", resourcePath, resourceParams, namer}, isCollectionDeleter)
		// DEPRECATED
		actions = appendIf(actions, action{"WATCHLIST", "watch/" + resourcePath, resourceParams, namer}, allowWatchList)

		// Add actions at the item path: /api/apiVersion/resource/{name}
		actions = appendIf(actions, action{"GET", itemPath, nameParams, namer}, isGetter)
		if getSubpath {
			actions = appendIf(actions, action{"GET", itemPath + "/{path:*}", proxyParams, namer}, isGetter)
		}
		actions = appendIf(actions, action{"PUT", itemPath, nameParams, namer}, isUpdater)
		actions = appendIf(actions, action{"PATCH", itemPath, nameParams, namer}, isPatcher)
		actions = appendIf(actions, action{"DELETE", itemPath, nameParams, namer}, isDeleter)
		actions = appendIf(actions, action{"WATCH", "watch/" + itemPath, nameParams, namer}, isWatcher)
		actions = appendIf(actions, action{"PROXY", "proxy/" + itemPath + "/{path:*}", proxyParams, namer}, isRedirector)
		actions = appendIf(actions, action{"PROXY", "proxy/" + itemPath, nameParams, namer}, isRedirector)
		actions = appendIf(actions, action{"CONNECT", itemPath, nameParams, namer}, isConnecter)
		actions = appendIf(actions, action{"CONNECT", itemPath + "/{path:*}", proxyParams, namer}, isConnecter && connectSubpath)
		break
	case meta.RESTScopeNameNamespace:
		// Handler for standard REST verbs (GET, PUT, POST and DELETE).
		namespaceParam := ws.PathParameter(scope.ArgumentName(), scope.ParamDescription()).DataType("string")
		namespacedPath := scope.ParamName() + "/{" + scope.ArgumentName() + "}/" + resource
		namespaceParams := []*restful.Parameter{namespaceParam}

		resourcePath := namespacedPath
		resourceParams := namespaceParams
		itemPath := namespacedPath + "/{name}"
		nameParams := append(namespaceParams, nameParam)
		proxyParams := append(nameParams, pathParam)
		if hasSubresource {
			itemPath = itemPath + "/" + subresource
			resourcePath = itemPath
			resourceParams = nameParams
		}
		apiResource.Name = path
		apiResource.Namespaced = true
		namer := scopeNaming{scope, a.group.Linker, gpath.Join(a.prefix, itemPath), false}

		actions = appendIf(actions, action{"LIST", resourcePath, resourceParams, namer}, isLister)
		actions = appendIf(actions, action{"POST", resourcePath, resourceParams, namer}, isCreater)
		actions = appendIf(actions, action{"DELETECOLLECTION", resourcePath, resourceParams, namer}, isCollectionDeleter)
		// DEPRECATED
		actions = appendIf(actions, action{"WATCHLIST", "watch/" + resourcePath, resourceParams, namer}, allowWatchList)

		actions = appendIf(actions, action{"GET", itemPath, nameParams, namer}, isGetter)
		if getSubpath {
			actions = appendIf(actions, action{"GET", itemPath + "/{path:*}", proxyParams, namer}, isGetter)
		}
		actions = appendIf(actions, action{"PUT", itemPath, nameParams, namer}, isUpdater)
		actions = appendIf(actions, action{"PATCH", itemPath, nameParams, namer}, isPatcher)
		actions = appendIf(actions, action{"DELETE", itemPath, nameParams, namer}, isDeleter)
		actions = appendIf(actions, action{"WATCH", "watch/" + itemPath, nameParams, namer}, isWatcher)
		actions = appendIf(actions, action{"PROXY", "proxy/" + itemPath + "/{path:*}", proxyParams, namer}, isRedirector)
		actions = appendIf(actions, action{"PROXY", "proxy/" + itemPath, nameParams, namer}, isRedirector)
		actions = appendIf(actions, action{"CONNECT", itemPath, nameParams, namer}, isConnecter)
		actions = appendIf(actions, action{"CONNECT", itemPath + "/{path:*}", proxyParams, namer}, isConnecter && connectSubpath)

		// list or post across namespace.
		// For ex: LIST all pods in all namespaces by sending a LIST request at /api/apiVersion/pods.
		// TODO: more strongly type whether a resource allows these actions on "all namespaces" (bulk delete)
		if !hasSubresource {
			namer = scopeNaming{scope, a.group.Linker, gpath.Join(a.prefix, itemPath), true}
			actions = appendIf(actions, action{"LIST", resource, params, namer}, isLister)
			actions = appendIf(actions, action{"WATCHLIST", "watch/" + resource, params, namer}, allowWatchList)
		}
		break
	default:
		return nil, fmt.Errorf("unsupported restscope: %s", scope.Name())
	}

	// Create Routes for the actions.
	// TODO: Add status documentation using Returns()
	// Errors (see api/errors/errors.go as well as go-restful router):
	// http.StatusNotFound, http.StatusMethodNotAllowed,
	// http.StatusUnsupportedMediaType, http.StatusNotAcceptable,
	// http.StatusBadRequest, http.StatusUnauthorized, http.StatusForbidden,
	// http.StatusRequestTimeout, http.StatusConflict, http.StatusPreconditionFailed,
	// 422 (StatusUnprocessableEntity), http.StatusInternalServerError,
	// http.StatusServiceUnavailable
	// and api error codes
	// Note that if we specify a versioned Status object here, we may need to
	// create one for the tests, also
	// Success:
	// http.StatusOK, http.StatusCreated, http.StatusAccepted, http.StatusNoContent
	//
	// test/integration/auth_test.go is currently the most comprehensive status code test

	reqScope := RequestScope{
		ContextFunc:    ctxFn,
		Serializer:     a.group.Serializer,
		ParameterCodec: a.group.ParameterCodec,
		Creater:        a.group.Creater,
		Convertor:      a.group.Convertor,

		Resource:    a.group.GroupVersion.WithResource(resource),
		Subresource: subresource,
		Kind:        a.group.GroupVersion.WithKind(kind),
	}
	for _, action := range actions {
		reqScope.Namer = action.Namer
		m := monitorFilter(action.Verb, resource)
		namespaced := ""
		if strings.Contains(action.Path, scope.ArgumentName()) {
			namespaced = "Namespaced"
		}
		switch action.Verb {
		case "GET": // Get a resource.
			var handler restful.RouteFunction
			if isGetterWithOptions {
				handler = GetResourceWithOptions(getterWithOptions, reqScope)
			} else {
				handler = GetResource(getter, exporter, reqScope)
			}
			doc := "read the specified " + kind
			if hasSubresource {
				doc = "read " + subresource + " of the specified " + kind
			}
			route := ws.GET(action.Path).To(handler).
				Filter(m).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Operation("read"+namespaced+kind+strings.Title(subresource)).
				Produces(append(storageMeta.ProducesMIMETypes(action.Verb), a.group.Serializer.SupportedMediaTypes()...)...).
				Returns(http.StatusOK, "OK", versionedObject).
				Writes(versionedObject)
			if isGetterWithOptions {
				if err := addObjectParams(ws, route, versionedGetOptions); err != nil {
					return nil, err
				}
			}
			if isExporter {
				if err := addObjectParams(ws, route, versionedExportOptions); err != nil {
					return nil, err
				}
			}
			addParams(route, action.Params)
			ws.Route(route)
		case "LIST": // List all resources of a kind.
			doc := "list objects of kind " + kind
			if hasSubresource {
				doc = "list " + subresource + " of objects of kind " + kind
			}
			route := ws.GET(action.Path).To(ListResource(lister, watcher, reqScope, false, a.minRequestTimeout)).
				Filter(m).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Operation("list"+namespaced+kind+strings.Title(subresource)).
				Produces(append(storageMeta.ProducesMIMETypes(action.Verb), a.group.Serializer.SupportedMediaTypes()...)...).
				Returns(http.StatusOK, "OK", versionedList).
				Writes(versionedList)
			if err := addObjectParams(ws, route, versionedListOptions); err != nil {
				return nil, err
			}
			switch {
			case isLister && isWatcher:
				doc := "list or watch objects of kind " + kind
				if hasSubresource {
					doc = "list or watch " + subresource + " of objects of kind " + kind
				}
				route.Doc(doc)
			case isWatcher:
				doc := "watch objects of kind " + kind
				if hasSubresource {
					doc = "watch " + subresource + "of objects of kind " + kind
				}
				route.Doc(doc)
			}
			addParams(route, action.Params)
			ws.Route(route)
		case "PUT": // Update a resource.
			doc := "replace the specified " + kind
			if hasSubresource {
				doc = "replace " + subresource + " of the specified " + kind
			}
			route := ws.PUT(action.Path).To(UpdateResource(updater, reqScope, a.group.Typer, admit)).
				Filter(m).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Operation("replace"+namespaced+kind+strings.Title(subresource)).
				Produces(append(storageMeta.ProducesMIMETypes(action.Verb), a.group.Serializer.SupportedMediaTypes()...)...).
				Returns(http.StatusOK, "OK", versionedObject).
				Reads(versionedObject).
				Writes(versionedObject)
			addParams(route, action.Params)
			ws.Route(route)
		case "PATCH": // Partially update a resource
			doc := "partially update the specified " + kind
			if hasSubresource {
				doc = "partially update " + subresource + " of the specified " + kind
			}
			route := ws.PATCH(action.Path).To(PatchResource(patcher, reqScope, a.group.Typer, admit, mapping.ObjectConvertor)).
				Filter(m).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Consumes(string(api.JSONPatchType), string(api.MergePatchType), string(api.StrategicMergePatchType)).
				Operation("patch"+namespaced+kind+strings.Title(subresource)).
				Produces(append(storageMeta.ProducesMIMETypes(action.Verb), a.group.Serializer.SupportedMediaTypes()...)...).
				Returns(http.StatusOK, "OK", versionedObject).
				Reads(unversioned.Patch{}).
				Writes(versionedObject)
			addParams(route, action.Params)
			ws.Route(route)
		case "POST": // Create a resource.
			var handler restful.RouteFunction
			if isNamedCreater {
				handler = CreateNamedResource(namedCreater, reqScope, a.group.Typer, admit)
			} else {
				handler = CreateResource(creater, reqScope, a.group.Typer, admit)
			}
			doc := "create a " + kind
			if hasSubresource {
				doc = "create " + subresource + " of a " + kind
			}
			route := ws.POST(action.Path).To(handler).
				Filter(m).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Operation("create"+namespaced+kind+strings.Title(subresource)).
				Produces(append(storageMeta.ProducesMIMETypes(action.Verb), a.group.Serializer.SupportedMediaTypes()...)...).
				Returns(http.StatusOK, "OK", versionedObject).
				Reads(versionedObject).
				Writes(versionedObject)
			addParams(route, action.Params)
			ws.Route(route)
		case "DELETE": // Delete a resource.
			doc := "delete a " + kind
			if hasSubresource {
				doc = "delete " + subresource + " of a " + kind
			}
			route := ws.DELETE(action.Path).To(DeleteResource(gracefulDeleter, isGracefulDeleter, reqScope, admit)).
				Filter(m).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Operation("delete"+namespaced+kind+strings.Title(subresource)).
				Produces(append(storageMeta.ProducesMIMETypes(action.Verb), a.group.Serializer.SupportedMediaTypes()...)...).
				Writes(versionedStatus).
				Returns(http.StatusOK, "OK", versionedStatus)
			if isGracefulDeleter {
				route.Reads(versionedDeleterObject)
			}
			addParams(route, action.Params)
			ws.Route(route)
		case "DELETECOLLECTION":
			doc := "delete collection of " + kind
			if hasSubresource {
				doc = "delete collection of " + subresource + " of a " + kind
			}
			route := ws.DELETE(action.Path).To(DeleteCollection(collectionDeleter, isCollectionDeleter, reqScope, admit)).
				Filter(m).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Operation("deletecollection"+namespaced+kind+strings.Title(subresource)).
				Produces(append(storageMeta.ProducesMIMETypes(action.Verb), a.group.Serializer.SupportedMediaTypes()...)...).
				Writes(versionedStatus).
				Returns(http.StatusOK, "OK", versionedStatus)
			if err := addObjectParams(ws, route, versionedListOptions); err != nil {
				return nil, err
			}
			addParams(route, action.Params)
			ws.Route(route)
		// TODO: deprecated
		case "WATCH": // Watch a resource.
			doc := "watch changes to an object of kind " + kind
			if hasSubresource {
				doc = "watch changes to " + subresource + " of an object of kind " + kind
			}
			route := ws.GET(action.Path).To(ListResource(lister, watcher, reqScope, true, a.minRequestTimeout)).
				Filter(m).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Operation("watch"+namespaced+kind+strings.Title(subresource)).
				Produces("application/json").
				Returns(http.StatusOK, "OK", watchjson.WatchEvent{}).
				Writes(watchjson.WatchEvent{})
			if err := addObjectParams(ws, route, versionedListOptions); err != nil {
				return nil, err
			}
			addParams(route, action.Params)
			ws.Route(route)
		// TODO: deprecated
		case "WATCHLIST": // Watch all resources of a kind.
			doc := "watch individual changes to a list of " + kind
			if hasSubresource {
				doc = "watch individual changes to a list of " + subresource + " of " + kind
			}
			route := ws.GET(action.Path).To(ListResource(lister, watcher, reqScope, true, a.minRequestTimeout)).
				Filter(m).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Operation("watch"+namespaced+kind+strings.Title(subresource)+"List").
				Produces("application/json").
				Returns(http.StatusOK, "OK", watchjson.WatchEvent{}).
				Writes(watchjson.WatchEvent{})
			if err := addObjectParams(ws, route, versionedListOptions); err != nil {
				return nil, err
			}
			addParams(route, action.Params)
			ws.Route(route)
		case "PROXY": // Proxy requests to a resource.
			// Accept all methods as per http://issue.k8s.io/3996
			addProxyRoute(ws, "GET", a.prefix, action.Path, proxyHandler, namespaced, kind, resource, subresource, hasSubresource, action.Params)
			addProxyRoute(ws, "PUT", a.prefix, action.Path, proxyHandler, namespaced, kind, resource, subresource, hasSubresource, action.Params)
			addProxyRoute(ws, "POST", a.prefix, action.Path, proxyHandler, namespaced, kind, resource, subresource, hasSubresource, action.Params)
			addProxyRoute(ws, "DELETE", a.prefix, action.Path, proxyHandler, namespaced, kind, resource, subresource, hasSubresource, action.Params)
			addProxyRoute(ws, "HEAD", a.prefix, action.Path, proxyHandler, namespaced, kind, resource, subresource, hasSubresource, action.Params)
			addProxyRoute(ws, "OPTIONS", a.prefix, action.Path, proxyHandler, namespaced, kind, resource, subresource, hasSubresource, action.Params)
		case "CONNECT":
			for _, method := range connecter.ConnectMethods() {
				doc := "connect " + method + " requests to " + kind
				if hasSubresource {
					doc = "connect " + method + " requests to " + subresource + " of " + kind
				}
				route := ws.Method(method).Path(action.Path).
					To(ConnectResource(connecter, reqScope, admit, path)).
					Filter(m).
					Doc(doc).
					Operation("connect" + strings.Title(strings.ToLower(method)) + namespaced + kind + strings.Title(subresource)).
					Produces("*/*").
					Consumes("*/*").
					Writes("string")
				if versionedConnectOptions != nil {
					if err := addObjectParams(ws, route, versionedConnectOptions); err != nil {
						return nil, err
					}
				}
				addParams(route, action.Params)
				ws.Route(route)
			}
		default:
			return nil, fmt.Errorf("unrecognized action verb: %s", action.Verb)
		}
		// Note: update GetAttribs() when adding a custom handler.
	}
	return &apiResource, nil
}
Esempio n. 2
0
func (a *APIInstaller) registerResourceHandlers(path string, storage rest.Storage, ws *restful.WebService, proxyHandler http.Handler) (*unversioned.APIResource, error) {
	admit := a.group.Admit
	context := a.group.Context

	optionsExternalVersion := a.group.GroupVersion
	if a.group.OptionsExternalVersion != nil {
		optionsExternalVersion = *a.group.OptionsExternalVersion
	}

	resource, subresource, err := splitSubresource(path)
	if err != nil {
		return nil, err
	}

	mapping, err := a.restMapping(resource)
	if err != nil {
		return nil, err
	}

	fqKindToRegister, err := a.getResourceKind(path, storage)
	if err != nil {
		return nil, err
	}

	versionedPtr, err := a.group.Creater.New(fqKindToRegister)
	if err != nil {
		return nil, err
	}
	versionedObject := indirectArbitraryPointer(versionedPtr)
	kind := fqKindToRegister.Kind
	hasSubresource := len(subresource) > 0

	// what verbs are supported by the storage, used to know what verbs we support per path
	creater, isCreater := storage.(rest.Creater)
	namedCreater, isNamedCreater := storage.(rest.NamedCreater)
	lister, isLister := storage.(rest.Lister)
	getter, isGetter := storage.(rest.Getter)
	getterWithOptions, isGetterWithOptions := storage.(rest.GetterWithOptions)
	deleter, isDeleter := storage.(rest.Deleter)
	gracefulDeleter, isGracefulDeleter := storage.(rest.GracefulDeleter)
	collectionDeleter, isCollectionDeleter := storage.(rest.CollectionDeleter)
	updater, isUpdater := storage.(rest.Updater)
	patcher, isPatcher := storage.(rest.Patcher)
	watcher, isWatcher := storage.(rest.Watcher)
	_, isRedirector := storage.(rest.Redirector)
	connecter, isConnecter := storage.(rest.Connecter)
	storageMeta, isMetadata := storage.(rest.StorageMetadata)
	if !isMetadata {
		storageMeta = defaultStorageMetadata{}
	}
	exporter, isExporter := storage.(rest.Exporter)
	if !isExporter {
		exporter = nil
	}

	versionedExportOptions, err := a.group.Creater.New(optionsExternalVersion.WithKind("ExportOptions"))
	if err != nil {
		return nil, err
	}

	if isNamedCreater {
		isCreater = true
	}

	var versionedList interface{}
	if isLister {
		list := lister.NewList()
		listGVKs, _, err := a.group.Typer.ObjectKinds(list)
		if err != nil {
			return nil, err
		}
		versionedListPtr, err := a.group.Creater.New(a.group.GroupVersion.WithKind(listGVKs[0].Kind))
		if err != nil {
			return nil, err
		}
		versionedList = indirectArbitraryPointer(versionedListPtr)
	}

	versionedListOptions, err := a.group.Creater.New(optionsExternalVersion.WithKind("ListOptions"))
	if err != nil {
		return nil, err
	}

	var versionedDeleterObject interface{}
	switch {
	case isGracefulDeleter:
		objectPtr, err := a.group.Creater.New(optionsExternalVersion.WithKind("DeleteOptions"))
		if err != nil {
			return nil, err
		}
		versionedDeleterObject = indirectArbitraryPointer(objectPtr)
		isDeleter = true
	case isDeleter:
		gracefulDeleter = rest.GracefulDeleteAdapter{Deleter: deleter}
	}

	versionedStatusPtr, err := a.group.Creater.New(optionsExternalVersion.WithKind("Status"))
	if err != nil {
		return nil, err
	}
	versionedStatus := indirectArbitraryPointer(versionedStatusPtr)
	var (
		getOptions             runtime.Object
		versionedGetOptions    runtime.Object
		getOptionsInternalKind unversioned.GroupVersionKind
		getSubpath             bool
	)
	if isGetterWithOptions {
		getOptions, getSubpath, _ = getterWithOptions.NewGetOptions()
		getOptionsInternalKinds, _, err := a.group.Typer.ObjectKinds(getOptions)
		if err != nil {
			return nil, err
		}
		getOptionsInternalKind = getOptionsInternalKinds[0]
		versionedGetOptions, err = a.group.Creater.New(optionsExternalVersion.WithKind(getOptionsInternalKind.Kind))
		if err != nil {
			return nil, err
		}
		isGetter = true
	}

	var versionedWatchEvent runtime.Object
	if isWatcher {
		versionedWatchEvent, err = a.group.Creater.New(a.group.GroupVersion.WithKind("WatchEvent"))
		if err != nil {
			return nil, err
		}
	}

	var (
		connectOptions             runtime.Object
		versionedConnectOptions    runtime.Object
		connectOptionsInternalKind unversioned.GroupVersionKind
		connectSubpath             bool
	)
	if isConnecter {
		connectOptions, connectSubpath, _ = connecter.NewConnectOptions()
		if connectOptions != nil {
			connectOptionsInternalKinds, _, err := a.group.Typer.ObjectKinds(connectOptions)
			if err != nil {
				return nil, err
			}

			connectOptionsInternalKind = connectOptionsInternalKinds[0]
			versionedConnectOptions, err = a.group.Creater.New(optionsExternalVersion.WithKind(connectOptionsInternalKind.Kind))
			if err != nil {
				return nil, err
			}
		}
	}

	var ctxFn ContextFunc
	ctxFn = func(req *restful.Request) api.Context {
		if context == nil {
			return api.NewContext()
		}
		if ctx, ok := context.Get(req.Request); ok {
			return ctx
		}
		return api.NewContext()
	}

	allowWatchList := isWatcher && isLister // watching on lists is allowed only for kinds that support both watch and list.
	scope := mapping.Scope
	nameParam := ws.PathParameter("name", "name of the "+kind).DataType("string")
	pathParam := ws.PathParameter("path", "path to the resource").DataType("string")

	params := []*restful.Parameter{}
	actions := []action{}

	var resourceKind string
	kindProvider, ok := storage.(rest.KindProvider)
	if ok {
		resourceKind = kindProvider.Kind()
	} else {
		resourceKind = kind
	}

	var apiResource unversioned.APIResource
	// Get the list of actions for the given scope.
	switch scope.Name() {
	case meta.RESTScopeNameRoot:
		// Handle non-namespace scoped resources like nodes.
		resourcePath := resource
		resourceParams := params
		itemPath := resourcePath + "/{name}"
		nameParams := append(params, nameParam)
		proxyParams := append(nameParams, pathParam)
		if hasSubresource {
			itemPath = itemPath + "/" + subresource
			resourcePath = itemPath
			resourceParams = nameParams
		}
		apiResource.Name = path
		apiResource.Namespaced = false
		apiResource.Kind = resourceKind
		namer := rootScopeNaming{scope, a.group.Linker, gpath.Join(a.prefix, itemPath)}

		// Handler for standard REST verbs (GET, PUT, POST and DELETE).
		// Add actions at the resource path: /api/apiVersion/resource
		actions = appendIf(actions, action{"LIST", resourcePath, resourceParams, namer}, isLister)
		actions = appendIf(actions, action{"POST", resourcePath, resourceParams, namer}, isCreater)
		actions = appendIf(actions, action{"DELETECOLLECTION", resourcePath, resourceParams, namer}, isCollectionDeleter)
		// DEPRECATED
		actions = appendIf(actions, action{"WATCHLIST", "watch/" + resourcePath, resourceParams, namer}, allowWatchList)

		// Add actions at the item path: /api/apiVersion/resource/{name}
		actions = appendIf(actions, action{"GET", itemPath, nameParams, namer}, isGetter)
		if getSubpath {
			actions = appendIf(actions, action{"GET", itemPath + "/{path:*}", proxyParams, namer}, isGetter)
		}
		actions = appendIf(actions, action{"PUT", itemPath, nameParams, namer}, isUpdater)
		actions = appendIf(actions, action{"PATCH", itemPath, nameParams, namer}, isPatcher)
		actions = appendIf(actions, action{"DELETE", itemPath, nameParams, namer}, isDeleter)
		actions = appendIf(actions, action{"WATCH", "watch/" + itemPath, nameParams, namer}, isWatcher)
		// We add "proxy" subresource to remove the need for the generic top level prefix proxy.
		// The generic top level prefix proxy is deprecated in v1.2, and will be removed in 1.3, or 1.4 at the latest.
		// TODO: DEPRECATED in v1.2.
		actions = appendIf(actions, action{"PROXY", "proxy/" + itemPath + "/{path:*}", proxyParams, namer}, isRedirector)
		// TODO: DEPRECATED in v1.2.
		actions = appendIf(actions, action{"PROXY", "proxy/" + itemPath, nameParams, namer}, isRedirector)
		actions = appendIf(actions, action{"CONNECT", itemPath, nameParams, namer}, isConnecter)
		actions = appendIf(actions, action{"CONNECT", itemPath + "/{path:*}", proxyParams, namer}, isConnecter && connectSubpath)
		break
	case meta.RESTScopeNameNamespace:
		// Handler for standard REST verbs (GET, PUT, POST and DELETE).
		namespaceParam := ws.PathParameter(scope.ArgumentName(), scope.ParamDescription()).DataType("string")
		namespacedPath := scope.ParamName() + "/{" + scope.ArgumentName() + "}/" + resource
		namespaceParams := []*restful.Parameter{namespaceParam}

		resourcePath := namespacedPath
		resourceParams := namespaceParams
		itemPathPrefix := gpath.Join(a.prefix, scope.ParamName()) + "/"
		itemPath := namespacedPath + "/{name}"
		itemPathMiddle := "/" + resource + "/"
		nameParams := append(namespaceParams, nameParam)
		proxyParams := append(nameParams, pathParam)
		itemPathSuffix := ""
		if hasSubresource {
			itemPathSuffix = "/" + subresource
			itemPath = itemPath + itemPathSuffix
			resourcePath = itemPath
			resourceParams = nameParams
		}
		apiResource.Name = path
		apiResource.Namespaced = true
		apiResource.Kind = resourceKind

		itemPathFn := func(name, namespace string) string {
			return itemPathPrefix + namespace + itemPathMiddle + name + itemPathSuffix
		}
		namer := scopeNaming{scope, a.group.Linker, itemPathFn, false}

		actions = appendIf(actions, action{"LIST", resourcePath, resourceParams, namer}, isLister)
		actions = appendIf(actions, action{"POST", resourcePath, resourceParams, namer}, isCreater)
		actions = appendIf(actions, action{"DELETECOLLECTION", resourcePath, resourceParams, namer}, isCollectionDeleter)
		// DEPRECATED
		actions = appendIf(actions, action{"WATCHLIST", "watch/" + resourcePath, resourceParams, namer}, allowWatchList)

		actions = appendIf(actions, action{"GET", itemPath, nameParams, namer}, isGetter)
		if getSubpath {
			actions = appendIf(actions, action{"GET", itemPath + "/{path:*}", proxyParams, namer}, isGetter)
		}
		actions = appendIf(actions, action{"PUT", itemPath, nameParams, namer}, isUpdater)
		actions = appendIf(actions, action{"PATCH", itemPath, nameParams, namer}, isPatcher)
		actions = appendIf(actions, action{"DELETE", itemPath, nameParams, namer}, isDeleter)
		actions = appendIf(actions, action{"WATCH", "watch/" + itemPath, nameParams, namer}, isWatcher)
		// We add "proxy" subresource to remove the need for the generic top level prefix proxy.
		// The generic top level prefix proxy is deprecated in v1.2, and will be removed in 1.3, or 1.4 at the latest.
		// TODO: DEPRECATED in v1.2.
		actions = appendIf(actions, action{"PROXY", "proxy/" + itemPath + "/{path:*}", proxyParams, namer}, isRedirector)
		// TODO: DEPRECATED in v1.2.
		actions = appendIf(actions, action{"PROXY", "proxy/" + itemPath, nameParams, namer}, isRedirector)
		actions = appendIf(actions, action{"CONNECT", itemPath, nameParams, namer}, isConnecter)
		actions = appendIf(actions, action{"CONNECT", itemPath + "/{path:*}", proxyParams, namer}, isConnecter && connectSubpath)

		// list or post across namespace.
		// For ex: LIST all pods in all namespaces by sending a LIST request at /api/apiVersion/pods.
		// TODO: more strongly type whether a resource allows these actions on "all namespaces" (bulk delete)
		if !hasSubresource {
			namer = scopeNaming{scope, a.group.Linker, itemPathFn, true}
			actions = appendIf(actions, action{"LIST", resource, params, namer}, isLister)
			actions = appendIf(actions, action{"WATCHLIST", "watch/" + resource, params, namer}, allowWatchList)
		}
		break
	default:
		return nil, fmt.Errorf("unsupported restscope: %s", scope.Name())
	}

	// Create Routes for the actions.
	// TODO: Add status documentation using Returns()
	// Errors (see api/errors/errors.go as well as go-restful router):
	// http.StatusNotFound, http.StatusMethodNotAllowed,
	// http.StatusUnsupportedMediaType, http.StatusNotAcceptable,
	// http.StatusBadRequest, http.StatusUnauthorized, http.StatusForbidden,
	// http.StatusRequestTimeout, http.StatusConflict, http.StatusPreconditionFailed,
	// 422 (StatusUnprocessableEntity), http.StatusInternalServerError,
	// http.StatusServiceUnavailable
	// and api error codes
	// Note that if we specify a versioned Status object here, we may need to
	// create one for the tests, also
	// Success:
	// http.StatusOK, http.StatusCreated, http.StatusAccepted, http.StatusNoContent
	//
	// test/integration/auth_test.go is currently the most comprehensive status code test

	reqScope := RequestScope{
		ContextFunc:    ctxFn,
		Serializer:     a.group.Serializer,
		ParameterCodec: a.group.ParameterCodec,
		Creater:        a.group.Creater,
		Convertor:      a.group.Convertor,
		Copier:         a.group.Copier,

		// TODO: This seems wrong for cross-group subresources. It makes an assumption that a subresource and its parent are in the same group version. Revisit this.
		Resource:    a.group.GroupVersion.WithResource(resource),
		Subresource: subresource,
		Kind:        fqKindToRegister,
	}
	for _, action := range actions {
		reqScope.Namer = action.Namer
		namespaced := ""
		if apiResource.Namespaced {
			namespaced = "Namespaced"
		}
		switch action.Verb {
		case "GET": // Get a resource.
			var handler restful.RouteFunction
			if isGetterWithOptions {
				handler = GetResourceWithOptions(getterWithOptions, reqScope)
			} else {
				handler = GetResource(getter, exporter, reqScope)
			}
			handler = metrics.InstrumentRouteFunc(action.Verb, resource, handler)
			doc := "read the specified " + kind
			if hasSubresource {
				doc = "read " + subresource + " of the specified " + kind
			}
			route := ws.GET(action.Path).To(handler).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Operation("read"+namespaced+kind+strings.Title(subresource)).
				Produces(append(storageMeta.ProducesMIMETypes(action.Verb), a.group.Serializer.SupportedMediaTypes()...)...).
				Returns(http.StatusOK, "OK", versionedObject).
				Writes(versionedObject)
			if isGetterWithOptions {
				if err := addObjectParams(ws, route, versionedGetOptions); err != nil {
					return nil, err
				}
			}
			if isExporter {
				if err := addObjectParams(ws, route, versionedExportOptions); err != nil {
					return nil, err
				}
			}
			addParams(route, action.Params)
			ws.Route(route)
		case "LIST": // List all resources of a kind.
			doc := "list objects of kind " + kind
			if hasSubresource {
				doc = "list " + subresource + " of objects of kind " + kind
			}
			handler := metrics.InstrumentRouteFunc(action.Verb, resource, ListResource(lister, watcher, reqScope, false, a.minRequestTimeout))
			route := ws.GET(action.Path).To(handler).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Operation("list"+namespaced+kind+strings.Title(subresource)).
				Produces(append(storageMeta.ProducesMIMETypes(action.Verb), a.group.Serializer.SupportedMediaTypes()...)...).
				Returns(http.StatusOK, "OK", versionedList).
				Writes(versionedList)
			if err := addObjectParams(ws, route, versionedListOptions); err != nil {
				return nil, err
			}
			switch {
			case isLister && isWatcher:
				doc := "list or watch objects of kind " + kind
				if hasSubresource {
					doc = "list or watch " + subresource + " of objects of kind " + kind
				}
				route.Doc(doc)
			case isWatcher:
				doc := "watch objects of kind " + kind
				if hasSubresource {
					doc = "watch " + subresource + "of objects of kind " + kind
				}
				route.Doc(doc)
			}
			addParams(route, action.Params)
			ws.Route(route)
		case "PUT": // Update a resource.
			doc := "replace the specified " + kind
			if hasSubresource {
				doc = "replace " + subresource + " of the specified " + kind
			}
			handler := metrics.InstrumentRouteFunc(action.Verb, resource, UpdateResource(updater, reqScope, a.group.Typer, admit))
			route := ws.PUT(action.Path).To(handler).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Operation("replace"+namespaced+kind+strings.Title(subresource)).
				Produces(append(storageMeta.ProducesMIMETypes(action.Verb), a.group.Serializer.SupportedMediaTypes()...)...).
				Returns(http.StatusOK, "OK", versionedObject).
				Reads(versionedObject).
				Writes(versionedObject)
			addParams(route, action.Params)
			ws.Route(route)
		case "PATCH": // Partially update a resource
			doc := "partially update the specified " + kind
			if hasSubresource {
				doc = "partially update " + subresource + " of the specified " + kind
			}
			handler := metrics.InstrumentRouteFunc(action.Verb, resource, PatchResource(patcher, reqScope, a.group.Typer, admit, mapping.ObjectConvertor))
			route := ws.PATCH(action.Path).To(handler).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Consumes(string(api.JSONPatchType), string(api.MergePatchType), string(api.StrategicMergePatchType)).
				Operation("patch"+namespaced+kind+strings.Title(subresource)).
				Produces(append(storageMeta.ProducesMIMETypes(action.Verb), a.group.Serializer.SupportedMediaTypes()...)...).
				Returns(http.StatusOK, "OK", versionedObject).
				Reads(unversioned.Patch{}).
				Writes(versionedObject)
			addParams(route, action.Params)
			ws.Route(route)
		case "POST": // Create a resource.
			var handler restful.RouteFunction
			if isNamedCreater {
				handler = CreateNamedResource(namedCreater, reqScope, a.group.Typer, admit)
			} else {
				handler = CreateResource(creater, reqScope, a.group.Typer, admit)
			}
			handler = metrics.InstrumentRouteFunc(action.Verb, resource, handler)
			doc := "create a " + kind
			if hasSubresource {
				doc = "create " + subresource + " of a " + kind
			}
			route := ws.POST(action.Path).To(handler).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Operation("create"+namespaced+kind+strings.Title(subresource)).
				Produces(append(storageMeta.ProducesMIMETypes(action.Verb), a.group.Serializer.SupportedMediaTypes()...)...).
				Returns(http.StatusOK, "OK", versionedObject).
				Reads(versionedObject).
				Writes(versionedObject)
			addParams(route, action.Params)
			ws.Route(route)
		case "DELETE": // Delete a resource.
			doc := "delete a " + kind
			if hasSubresource {
				doc = "delete " + subresource + " of a " + kind
			}
			handler := metrics.InstrumentRouteFunc(action.Verb, resource, DeleteResource(gracefulDeleter, isGracefulDeleter, reqScope, admit))
			route := ws.DELETE(action.Path).To(handler).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Operation("delete"+namespaced+kind+strings.Title(subresource)).
				Produces(append(storageMeta.ProducesMIMETypes(action.Verb), a.group.Serializer.SupportedMediaTypes()...)...).
				Writes(versionedStatus).
				Returns(http.StatusOK, "OK", versionedStatus)
			if isGracefulDeleter {
				route.Reads(versionedDeleterObject)
			}
			addParams(route, action.Params)
			ws.Route(route)
		case "DELETECOLLECTION":
			doc := "delete collection of " + kind
			if hasSubresource {
				doc = "delete collection of " + subresource + " of a " + kind
			}
			handler := metrics.InstrumentRouteFunc(action.Verb, resource, DeleteCollection(collectionDeleter, isCollectionDeleter, reqScope, admit))
			route := ws.DELETE(action.Path).To(handler).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Operation("deletecollection"+namespaced+kind+strings.Title(subresource)).
				Produces(append(storageMeta.ProducesMIMETypes(action.Verb), a.group.Serializer.SupportedMediaTypes()...)...).
				Writes(versionedStatus).
				Returns(http.StatusOK, "OK", versionedStatus)
			if err := addObjectParams(ws, route, versionedListOptions); err != nil {
				return nil, err
			}
			addParams(route, action.Params)
			ws.Route(route)
		// TODO: deprecated
		case "WATCH": // Watch a resource.
			doc := "watch changes to an object of kind " + kind
			if hasSubresource {
				doc = "watch changes to " + subresource + " of an object of kind " + kind
			}
			handler := metrics.InstrumentRouteFunc(action.Verb, resource, ListResource(lister, watcher, reqScope, true, a.minRequestTimeout))
			route := ws.GET(action.Path).To(handler).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Operation("watch"+namespaced+kind+strings.Title(subresource)).
				Produces(a.group.Serializer.SupportedStreamingMediaTypes()...).
				Returns(http.StatusOK, "OK", versionedWatchEvent).
				Writes(versionedWatchEvent)
			if err := addObjectParams(ws, route, versionedListOptions); err != nil {
				return nil, err
			}
			addParams(route, action.Params)
			ws.Route(route)
		// TODO: deprecated
		case "WATCHLIST": // Watch all resources of a kind.
			doc := "watch individual changes to a list of " + kind
			if hasSubresource {
				doc = "watch individual changes to a list of " + subresource + " of " + kind
			}
			handler := metrics.InstrumentRouteFunc(action.Verb, resource, ListResource(lister, watcher, reqScope, true, a.minRequestTimeout))
			route := ws.GET(action.Path).To(handler).
				Doc(doc).
				Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
				Operation("watch"+namespaced+kind+strings.Title(subresource)+"List").
				Produces(a.group.Serializer.SupportedStreamingMediaTypes()...).
				Returns(http.StatusOK, "OK", versionedWatchEvent).
				Writes(versionedWatchEvent)
			if err := addObjectParams(ws, route, versionedListOptions); err != nil {
				return nil, err
			}
			addParams(route, action.Params)
			ws.Route(route)
		// We add "proxy" subresource to remove the need for the generic top level prefix proxy.
		// The generic top level prefix proxy is deprecated in v1.2, and will be removed in 1.3, or 1.4 at the latest.
		// TODO: DEPRECATED in v1.2.
		case "PROXY": // Proxy requests to a resource.
			// Accept all methods as per http://issue.k8s.io/3996
			addProxyRoute(ws, "GET", a.prefix, action.Path, proxyHandler, namespaced, kind, resource, subresource, hasSubresource, action.Params)
			addProxyRoute(ws, "PUT", a.prefix, action.Path, proxyHandler, namespaced, kind, resource, subresource, hasSubresource, action.Params)
			addProxyRoute(ws, "POST", a.prefix, action.Path, proxyHandler, namespaced, kind, resource, subresource, hasSubresource, action.Params)
			addProxyRoute(ws, "DELETE", a.prefix, action.Path, proxyHandler, namespaced, kind, resource, subresource, hasSubresource, action.Params)
			addProxyRoute(ws, "HEAD", a.prefix, action.Path, proxyHandler, namespaced, kind, resource, subresource, hasSubresource, action.Params)
			addProxyRoute(ws, "OPTIONS", a.prefix, action.Path, proxyHandler, namespaced, kind, resource, subresource, hasSubresource, action.Params)
		case "CONNECT":
			for _, method := range connecter.ConnectMethods() {
				doc := "connect " + method + " requests to " + kind
				if hasSubresource {
					doc = "connect " + method + " requests to " + subresource + " of " + kind
				}
				handler := metrics.InstrumentRouteFunc(action.Verb, resource, ConnectResource(connecter, reqScope, admit, path))
				route := ws.Method(method).Path(action.Path).
					To(handler).
					Doc(doc).
					Operation("connect" + strings.Title(strings.ToLower(method)) + namespaced + kind + strings.Title(subresource)).
					Produces("*/*").
					Consumes("*/*").
					Writes("string")
				if versionedConnectOptions != nil {
					if err := addObjectParams(ws, route, versionedConnectOptions); err != nil {
						return nil, err
					}
				}
				addParams(route, action.Params)
				ws.Route(route)
			}
		default:
			return nil, fmt.Errorf("unrecognized action verb: %s", action.Verb)
		}
		// Note: update GetAttribs() when adding a custom handler.
	}
	return &apiResource, nil
}