mirror of https://github.com/k3s-io/k3s
1078 lines
41 KiB
Go
1078 lines
41 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package endpoints
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import (
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"fmt"
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"net/http"
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gpath "path"
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"reflect"
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"sort"
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"strings"
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"time"
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"unicode"
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"github.com/emicklei/go-restful"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/conversion"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/apiserver/pkg/admission"
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"k8s.io/apiserver/pkg/endpoints/handlers"
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"k8s.io/apiserver/pkg/endpoints/handlers/negotiation"
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"k8s.io/apiserver/pkg/endpoints/metrics"
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"k8s.io/apiserver/pkg/registry/rest"
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)
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const (
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ROUTE_META_GVK = "x-kubernetes-group-version-kind"
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ROUTE_META_ACTION = "x-kubernetes-action"
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)
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type APIInstaller struct {
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group *APIGroupVersion
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prefix string // Path prefix where API resources are to be registered.
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minRequestTimeout time.Duration
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}
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// Struct capturing information about an action ("GET", "POST", "WATCH", "PROXY", etc).
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type action struct {
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Verb string // Verb identifying the action ("GET", "POST", "WATCH", "PROXY", etc).
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Path string // The path of the action
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Params []*restful.Parameter // List of parameters associated with the action.
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Namer handlers.ScopeNamer
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AllNamespaces bool // true iff the action is namespaced but works on aggregate result for all namespaces
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}
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// An interface to see if one storage supports override its default verb for monitoring
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type StorageMetricsOverride interface {
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// OverrideMetricsVerb gives a storage object an opportunity to override the verb reported to the metrics endpoint
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OverrideMetricsVerb(oldVerb string) (newVerb string)
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}
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// An interface to see if an object supports swagger documentation as a method
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type documentable interface {
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SwaggerDoc() map[string]string
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}
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// toDiscoveryKubeVerb maps an action.Verb to the logical kube verb, used for discovery
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var toDiscoveryKubeVerb = map[string]string{
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"CONNECT": "", // do not list in discovery.
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"DELETE": "delete",
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"DELETECOLLECTION": "deletecollection",
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"GET": "get",
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"LIST": "list",
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"PATCH": "patch",
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"POST": "create",
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"PROXY": "proxy",
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"PUT": "update",
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"WATCH": "watch",
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"WATCHLIST": "watch",
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}
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// Install handlers for API resources.
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func (a *APIInstaller) Install() ([]metav1.APIResource, *restful.WebService, []error) {
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var apiResources []metav1.APIResource
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var errors []error
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ws := a.newWebService()
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// Register the paths in a deterministic (sorted) order to get a deterministic swagger spec.
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paths := make([]string, len(a.group.Storage))
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var i int = 0
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for path := range a.group.Storage {
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paths[i] = path
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i++
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}
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sort.Strings(paths)
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for _, path := range paths {
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apiResource, err := a.registerResourceHandlers(path, a.group.Storage[path], ws)
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if err != nil {
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errors = append(errors, fmt.Errorf("error in registering resource: %s, %v", path, err))
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}
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if apiResource != nil {
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apiResources = append(apiResources, *apiResource)
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}
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}
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return apiResources, ws, errors
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}
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// newWebService creates a new restful webservice with the api installer's prefix and version.
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func (a *APIInstaller) newWebService() *restful.WebService {
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ws := new(restful.WebService)
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ws.Path(a.prefix)
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// a.prefix contains "prefix/group/version"
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ws.Doc("API at " + a.prefix)
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// Backwards compatibility, we accepted objects with empty content-type at V1.
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// If we stop using go-restful, we can default empty content-type to application/json on an
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// endpoint by endpoint basis
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ws.Consumes("*/*")
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mediaTypes, streamMediaTypes := negotiation.MediaTypesForSerializer(a.group.Serializer)
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ws.Produces(append(mediaTypes, streamMediaTypes...)...)
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ws.ApiVersion(a.group.GroupVersion.String())
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return ws
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}
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// GetResourceKind returns the external group version kind registered for the given storage
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// object. If the storage object is a subresource and has an override supplied for it, it returns
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// the group version kind supplied in the override.
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func GetResourceKind(groupVersion schema.GroupVersion, storage rest.Storage, typer runtime.ObjectTyper) (schema.GroupVersionKind, error) {
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// Let the storage tell us exactly what GVK it has
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if gvkProvider, ok := storage.(rest.GroupVersionKindProvider); ok {
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return gvkProvider.GroupVersionKind(groupVersion), nil
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}
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object := storage.New()
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fqKinds, _, err := typer.ObjectKinds(object)
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if err != nil {
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return schema.GroupVersionKind{}, err
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}
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// a given go type can have multiple potential fully qualified kinds. Find the one that corresponds with the group
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// we're trying to register here
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fqKindToRegister := schema.GroupVersionKind{}
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for _, fqKind := range fqKinds {
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if fqKind.Group == groupVersion.Group {
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fqKindToRegister = groupVersion.WithKind(fqKind.Kind)
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break
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}
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}
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if fqKindToRegister.Empty() {
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return schema.GroupVersionKind{}, fmt.Errorf("unable to locate fully qualified kind for %v: found %v when registering for %v", reflect.TypeOf(object), fqKinds, groupVersion)
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}
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// group is guaranteed to match based on the check above
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return fqKindToRegister, nil
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}
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func (a *APIInstaller) registerResourceHandlers(path string, storage rest.Storage, ws *restful.WebService) (*metav1.APIResource, error) {
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admit := a.group.Admit
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optionsExternalVersion := a.group.GroupVersion
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if a.group.OptionsExternalVersion != nil {
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optionsExternalVersion = *a.group.OptionsExternalVersion
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}
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resource, subresource, err := splitSubresource(path)
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if err != nil {
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return nil, err
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}
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group, version := a.group.GroupVersion.Group, a.group.GroupVersion.Version
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fqKindToRegister, err := GetResourceKind(a.group.GroupVersion, storage, a.group.Typer)
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if err != nil {
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return nil, err
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}
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versionedPtr, err := a.group.Creater.New(fqKindToRegister)
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if err != nil {
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return nil, err
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}
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defaultVersionedObject := indirectArbitraryPointer(versionedPtr)
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kind := fqKindToRegister.Kind
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isSubresource := len(subresource) > 0
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// If there is a subresource, namespace scoping is defined by the parent resource
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namespaceScoped := true
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if isSubresource {
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parentStorage, ok := a.group.Storage[resource]
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if !ok {
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return nil, fmt.Errorf("missing parent storage: %q", resource)
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}
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scoper, ok := parentStorage.(rest.Scoper)
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if !ok {
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return nil, fmt.Errorf("%q must implement scoper", resource)
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}
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namespaceScoped = scoper.NamespaceScoped()
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} else {
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scoper, ok := storage.(rest.Scoper)
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if !ok {
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return nil, fmt.Errorf("%q must implement scoper", resource)
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}
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namespaceScoped = scoper.NamespaceScoped()
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}
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// what verbs are supported by the storage, used to know what verbs we support per path
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creater, isCreater := storage.(rest.Creater)
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namedCreater, isNamedCreater := storage.(rest.NamedCreater)
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lister, isLister := storage.(rest.Lister)
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getter, isGetter := storage.(rest.Getter)
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getterWithOptions, isGetterWithOptions := storage.(rest.GetterWithOptions)
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gracefulDeleter, isGracefulDeleter := storage.(rest.GracefulDeleter)
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collectionDeleter, isCollectionDeleter := storage.(rest.CollectionDeleter)
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updater, isUpdater := storage.(rest.Updater)
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patcher, isPatcher := storage.(rest.Patcher)
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watcher, isWatcher := storage.(rest.Watcher)
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connecter, isConnecter := storage.(rest.Connecter)
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storageMeta, isMetadata := storage.(rest.StorageMetadata)
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if !isMetadata {
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storageMeta = defaultStorageMetadata{}
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}
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exporter, isExporter := storage.(rest.Exporter)
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if !isExporter {
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exporter = nil
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}
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versionedExportOptions, err := a.group.Creater.New(optionsExternalVersion.WithKind("ExportOptions"))
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if err != nil {
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return nil, err
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}
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if isNamedCreater {
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isCreater = true
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}
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var versionedList interface{}
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if isLister {
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list := lister.NewList()
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listGVKs, _, err := a.group.Typer.ObjectKinds(list)
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if err != nil {
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return nil, err
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}
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versionedListPtr, err := a.group.Creater.New(a.group.GroupVersion.WithKind(listGVKs[0].Kind))
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if err != nil {
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return nil, err
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}
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versionedList = indirectArbitraryPointer(versionedListPtr)
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}
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versionedListOptions, err := a.group.Creater.New(optionsExternalVersion.WithKind("ListOptions"))
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if err != nil {
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return nil, err
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}
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versionedCreateOptions, err := a.group.Creater.New(optionsExternalVersion.WithKind("CreateOptions"))
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if err != nil {
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return nil, err
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}
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versionedPatchOptions, err := a.group.Creater.New(optionsExternalVersion.WithKind("PatchOptions"))
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if err != nil {
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return nil, err
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}
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versionedUpdateOptions, err := a.group.Creater.New(optionsExternalVersion.WithKind("UpdateOptions"))
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if err != nil {
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return nil, err
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}
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var versionedDeleteOptions runtime.Object
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var versionedDeleterObject interface{}
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if isGracefulDeleter {
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versionedDeleteOptions, err = a.group.Creater.New(optionsExternalVersion.WithKind("DeleteOptions"))
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if err != nil {
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return nil, err
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}
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versionedDeleterObject = indirectArbitraryPointer(versionedDeleteOptions)
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}
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versionedStatusPtr, err := a.group.Creater.New(optionsExternalVersion.WithKind("Status"))
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if err != nil {
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return nil, err
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}
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versionedStatus := indirectArbitraryPointer(versionedStatusPtr)
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var (
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getOptions runtime.Object
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versionedGetOptions runtime.Object
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getOptionsInternalKind schema.GroupVersionKind
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getSubpath bool
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)
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if isGetterWithOptions {
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getOptions, getSubpath, _ = getterWithOptions.NewGetOptions()
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getOptionsInternalKinds, _, err := a.group.Typer.ObjectKinds(getOptions)
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if err != nil {
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return nil, err
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}
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getOptionsInternalKind = getOptionsInternalKinds[0]
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versionedGetOptions, err = a.group.Creater.New(a.group.GroupVersion.WithKind(getOptionsInternalKind.Kind))
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if err != nil {
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versionedGetOptions, err = a.group.Creater.New(optionsExternalVersion.WithKind(getOptionsInternalKind.Kind))
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if err != nil {
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return nil, err
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}
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}
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isGetter = true
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}
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var versionedWatchEvent interface{}
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if isWatcher {
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versionedWatchEventPtr, err := a.group.Creater.New(a.group.GroupVersion.WithKind("WatchEvent"))
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if err != nil {
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return nil, err
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}
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versionedWatchEvent = indirectArbitraryPointer(versionedWatchEventPtr)
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}
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var (
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connectOptions runtime.Object
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versionedConnectOptions runtime.Object
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connectOptionsInternalKind schema.GroupVersionKind
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connectSubpath bool
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)
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if isConnecter {
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connectOptions, connectSubpath, _ = connecter.NewConnectOptions()
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if connectOptions != nil {
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connectOptionsInternalKinds, _, err := a.group.Typer.ObjectKinds(connectOptions)
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if err != nil {
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return nil, err
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}
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connectOptionsInternalKind = connectOptionsInternalKinds[0]
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versionedConnectOptions, err = a.group.Creater.New(a.group.GroupVersion.WithKind(connectOptionsInternalKind.Kind))
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if err != nil {
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versionedConnectOptions, err = a.group.Creater.New(optionsExternalVersion.WithKind(connectOptionsInternalKind.Kind))
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if err != nil {
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return nil, err
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}
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}
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}
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}
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allowWatchList := isWatcher && isLister // watching on lists is allowed only for kinds that support both watch and list.
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nameParam := ws.PathParameter("name", "name of the "+kind).DataType("string")
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pathParam := ws.PathParameter("path", "path to the resource").DataType("string")
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params := []*restful.Parameter{}
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actions := []action{}
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var resourceKind string
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kindProvider, ok := storage.(rest.KindProvider)
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if ok {
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resourceKind = kindProvider.Kind()
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} else {
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resourceKind = kind
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}
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tableProvider, _ := storage.(rest.TableConvertor)
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var apiResource metav1.APIResource
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// Get the list of actions for the given scope.
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switch {
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case !namespaceScoped:
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// Handle non-namespace scoped resources like nodes.
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resourcePath := resource
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resourceParams := params
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itemPath := resourcePath + "/{name}"
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nameParams := append(params, nameParam)
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proxyParams := append(nameParams, pathParam)
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suffix := ""
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if isSubresource {
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suffix = "/" + subresource
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itemPath = itemPath + suffix
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resourcePath = itemPath
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resourceParams = nameParams
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}
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apiResource.Name = path
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apiResource.Namespaced = false
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apiResource.Kind = resourceKind
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namer := handlers.ContextBasedNaming{
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SelfLinker: a.group.Linker,
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ClusterScoped: true,
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SelfLinkPathPrefix: gpath.Join(a.prefix, resource) + "/",
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SelfLinkPathSuffix: suffix,
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}
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// Handler for standard REST verbs (GET, PUT, POST and DELETE).
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// Add actions at the resource path: /api/apiVersion/resource
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actions = appendIf(actions, action{"LIST", resourcePath, resourceParams, namer, false}, isLister)
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actions = appendIf(actions, action{"POST", resourcePath, resourceParams, namer, false}, isCreater)
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actions = appendIf(actions, action{"DELETECOLLECTION", resourcePath, resourceParams, namer, false}, isCollectionDeleter)
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// DEPRECATED in 1.11
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actions = appendIf(actions, action{"WATCHLIST", "watch/" + resourcePath, resourceParams, namer, false}, allowWatchList)
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// Add actions at the item path: /api/apiVersion/resource/{name}
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actions = appendIf(actions, action{"GET", itemPath, nameParams, namer, false}, isGetter)
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if getSubpath {
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actions = appendIf(actions, action{"GET", itemPath + "/{path:*}", proxyParams, namer, false}, isGetter)
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}
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actions = appendIf(actions, action{"PUT", itemPath, nameParams, namer, false}, isUpdater)
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actions = appendIf(actions, action{"PATCH", itemPath, nameParams, namer, false}, isPatcher)
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actions = appendIf(actions, action{"DELETE", itemPath, nameParams, namer, false}, isGracefulDeleter)
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// DEPRECATED in 1.11
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actions = appendIf(actions, action{"WATCH", "watch/" + itemPath, nameParams, namer, false}, isWatcher)
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actions = appendIf(actions, action{"CONNECT", itemPath, nameParams, namer, false}, isConnecter)
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actions = appendIf(actions, action{"CONNECT", itemPath + "/{path:*}", proxyParams, namer, false}, isConnecter && connectSubpath)
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default:
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namespaceParamName := "namespaces"
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// Handler for standard REST verbs (GET, PUT, POST and DELETE).
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namespaceParam := ws.PathParameter("namespace", "object name and auth scope, such as for teams and projects").DataType("string")
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namespacedPath := namespaceParamName + "/{namespace}/" + resource
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namespaceParams := []*restful.Parameter{namespaceParam}
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resourcePath := namespacedPath
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resourceParams := namespaceParams
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itemPath := namespacedPath + "/{name}"
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nameParams := append(namespaceParams, nameParam)
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proxyParams := append(nameParams, pathParam)
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itemPathSuffix := ""
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if isSubresource {
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itemPathSuffix = "/" + subresource
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itemPath = itemPath + itemPathSuffix
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resourcePath = itemPath
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resourceParams = nameParams
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}
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apiResource.Name = path
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apiResource.Namespaced = true
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apiResource.Kind = resourceKind
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namer := handlers.ContextBasedNaming{
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SelfLinker: a.group.Linker,
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ClusterScoped: false,
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SelfLinkPathPrefix: gpath.Join(a.prefix, namespaceParamName) + "/",
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SelfLinkPathSuffix: itemPathSuffix,
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}
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actions = appendIf(actions, action{"LIST", resourcePath, resourceParams, namer, false}, isLister)
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actions = appendIf(actions, action{"POST", resourcePath, resourceParams, namer, false}, isCreater)
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actions = appendIf(actions, action{"DELETECOLLECTION", resourcePath, resourceParams, namer, false}, isCollectionDeleter)
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// DEPRECATED in 1.11
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actions = appendIf(actions, action{"WATCHLIST", "watch/" + resourcePath, resourceParams, namer, false}, allowWatchList)
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actions = appendIf(actions, action{"GET", itemPath, nameParams, namer, false}, isGetter)
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if getSubpath {
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actions = appendIf(actions, action{"GET", itemPath + "/{path:*}", proxyParams, namer, false}, isGetter)
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}
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actions = appendIf(actions, action{"PUT", itemPath, nameParams, namer, false}, isUpdater)
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actions = appendIf(actions, action{"PATCH", itemPath, nameParams, namer, false}, isPatcher)
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actions = appendIf(actions, action{"DELETE", itemPath, nameParams, namer, false}, isGracefulDeleter)
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// DEPRECATED in 1.11
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actions = appendIf(actions, action{"WATCH", "watch/" + itemPath, nameParams, namer, false}, isWatcher)
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actions = appendIf(actions, action{"CONNECT", itemPath, nameParams, namer, false}, isConnecter)
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actions = appendIf(actions, action{"CONNECT", itemPath + "/{path:*}", proxyParams, namer, false}, isConnecter && connectSubpath)
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// list or post across namespace.
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// For ex: LIST all pods in all namespaces by sending a LIST request at /api/apiVersion/pods.
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// TODO: more strongly type whether a resource allows these actions on "all namespaces" (bulk delete)
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if !isSubresource {
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actions = appendIf(actions, action{"LIST", resource, params, namer, true}, isLister)
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// DEPRECATED in 1.11
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actions = appendIf(actions, action{"WATCHLIST", "watch/" + resource, params, namer, true}, allowWatchList)
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}
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}
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// Create Routes for the actions.
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// 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,
|
|
// http.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
|
|
|
|
mediaTypes, streamMediaTypes := negotiation.MediaTypesForSerializer(a.group.Serializer)
|
|
allMediaTypes := append(mediaTypes, streamMediaTypes...)
|
|
ws.Produces(allMediaTypes...)
|
|
|
|
kubeVerbs := map[string]struct{}{}
|
|
reqScope := handlers.RequestScope{
|
|
Serializer: a.group.Serializer,
|
|
ParameterCodec: a.group.ParameterCodec,
|
|
Creater: a.group.Creater,
|
|
Convertor: a.group.Convertor,
|
|
Defaulter: a.group.Defaulter,
|
|
Typer: a.group.Typer,
|
|
UnsafeConvertor: a.group.UnsafeConvertor,
|
|
Authorizer: a.group.Authorizer,
|
|
|
|
// TODO: Check for the interface on storage
|
|
TableConvertor: tableProvider,
|
|
|
|
// 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,
|
|
|
|
HubGroupVersion: schema.GroupVersion{Group: fqKindToRegister.Group, Version: runtime.APIVersionInternal},
|
|
|
|
MetaGroupVersion: metav1.SchemeGroupVersion,
|
|
|
|
MaxRequestBodyBytes: a.group.MaxRequestBodyBytes,
|
|
}
|
|
if a.group.MetaGroupVersion != nil {
|
|
reqScope.MetaGroupVersion = *a.group.MetaGroupVersion
|
|
}
|
|
for _, action := range actions {
|
|
producedObject := storageMeta.ProducesObject(action.Verb)
|
|
if producedObject == nil {
|
|
producedObject = defaultVersionedObject
|
|
}
|
|
reqScope.Namer = action.Namer
|
|
|
|
requestScope := "cluster"
|
|
var namespaced string
|
|
var operationSuffix string
|
|
if apiResource.Namespaced {
|
|
requestScope = "namespace"
|
|
namespaced = "Namespaced"
|
|
}
|
|
if strings.HasSuffix(action.Path, "/{path:*}") {
|
|
requestScope = "resource"
|
|
operationSuffix = operationSuffix + "WithPath"
|
|
}
|
|
if action.AllNamespaces {
|
|
requestScope = "cluster"
|
|
operationSuffix = operationSuffix + "ForAllNamespaces"
|
|
namespaced = ""
|
|
}
|
|
|
|
if kubeVerb, found := toDiscoveryKubeVerb[action.Verb]; found {
|
|
if len(kubeVerb) != 0 {
|
|
kubeVerbs[kubeVerb] = struct{}{}
|
|
}
|
|
} else {
|
|
return nil, fmt.Errorf("unknown action verb for discovery: %s", action.Verb)
|
|
}
|
|
|
|
routes := []*restful.RouteBuilder{}
|
|
|
|
// If there is a subresource, kind should be the parent's kind.
|
|
if isSubresource {
|
|
parentStorage, ok := a.group.Storage[resource]
|
|
if !ok {
|
|
return nil, fmt.Errorf("missing parent storage: %q", resource)
|
|
}
|
|
|
|
fqParentKind, err := GetResourceKind(a.group.GroupVersion, parentStorage, a.group.Typer)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
kind = fqParentKind.Kind
|
|
}
|
|
|
|
verbOverrider, needOverride := storage.(StorageMetricsOverride)
|
|
|
|
switch action.Verb {
|
|
case "GET": // Get a resource.
|
|
var handler restful.RouteFunction
|
|
if isGetterWithOptions {
|
|
handler = restfulGetResourceWithOptions(getterWithOptions, reqScope, isSubresource)
|
|
} else {
|
|
handler = restfulGetResource(getter, exporter, reqScope)
|
|
}
|
|
|
|
if needOverride {
|
|
// need change the reported verb
|
|
handler = metrics.InstrumentRouteFunc(verbOverrider.OverrideMetricsVerb(action.Verb), group, version, resource, subresource, requestScope, metrics.APIServerComponent, handler)
|
|
} else {
|
|
handler = metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, handler)
|
|
}
|
|
|
|
doc := "read the specified " + kind
|
|
if isSubresource {
|
|
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)+operationSuffix).
|
|
Produces(append(storageMeta.ProducesMIMETypes(action.Verb), mediaTypes...)...).
|
|
Returns(http.StatusOK, "OK", producedObject).
|
|
Writes(producedObject)
|
|
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)
|
|
routes = append(routes, route)
|
|
case "LIST": // List all resources of a kind.
|
|
doc := "list objects of kind " + kind
|
|
if isSubresource {
|
|
doc = "list " + subresource + " of objects of kind " + kind
|
|
}
|
|
handler := metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, restfulListResource(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)+operationSuffix).
|
|
Produces(append(storageMeta.ProducesMIMETypes(action.Verb), allMediaTypes...)...).
|
|
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 isSubresource {
|
|
doc = "list or watch " + subresource + " of objects of kind " + kind
|
|
}
|
|
route.Doc(doc)
|
|
case isWatcher:
|
|
doc := "watch objects of kind " + kind
|
|
if isSubresource {
|
|
doc = "watch " + subresource + "of objects of kind " + kind
|
|
}
|
|
route.Doc(doc)
|
|
}
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
case "PUT": // Update a resource.
|
|
doc := "replace the specified " + kind
|
|
if isSubresource {
|
|
doc = "replace " + subresource + " of the specified " + kind
|
|
}
|
|
handler := metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, restfulUpdateResource(updater, reqScope, 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)+operationSuffix).
|
|
Produces(append(storageMeta.ProducesMIMETypes(action.Verb), mediaTypes...)...).
|
|
Returns(http.StatusOK, "OK", producedObject).
|
|
// TODO: in some cases, the API may return a v1.Status instead of the versioned object
|
|
// but currently go-restful can't handle multiple different objects being returned.
|
|
Returns(http.StatusCreated, "Created", producedObject).
|
|
Reads(defaultVersionedObject).
|
|
Writes(producedObject)
|
|
if err := AddObjectParams(ws, route, versionedUpdateOptions); err != nil {
|
|
return nil, err
|
|
}
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
case "PATCH": // Partially update a resource
|
|
doc := "partially update the specified " + kind
|
|
if isSubresource {
|
|
doc = "partially update " + subresource + " of the specified " + kind
|
|
}
|
|
supportedTypes := []string{
|
|
string(types.JSONPatchType),
|
|
string(types.MergePatchType),
|
|
string(types.StrategicMergePatchType),
|
|
}
|
|
handler := metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, restfulPatchResource(patcher, reqScope, admit, supportedTypes))
|
|
route := ws.PATCH(action.Path).To(handler).
|
|
Doc(doc).
|
|
Param(ws.QueryParameter("pretty", "If 'true', then the output is pretty printed.")).
|
|
Consumes(supportedTypes...).
|
|
Operation("patch"+namespaced+kind+strings.Title(subresource)+operationSuffix).
|
|
Produces(append(storageMeta.ProducesMIMETypes(action.Verb), mediaTypes...)...).
|
|
Returns(http.StatusOK, "OK", producedObject).
|
|
Reads(metav1.Patch{}).
|
|
Writes(producedObject)
|
|
if err := AddObjectParams(ws, route, versionedPatchOptions); err != nil {
|
|
return nil, err
|
|
}
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
case "POST": // Create a resource.
|
|
var handler restful.RouteFunction
|
|
if isNamedCreater {
|
|
handler = restfulCreateNamedResource(namedCreater, reqScope, admit)
|
|
} else {
|
|
handler = restfulCreateResource(creater, reqScope, admit)
|
|
}
|
|
handler = metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, handler)
|
|
article := GetArticleForNoun(kind, " ")
|
|
doc := "create" + article + kind
|
|
if isSubresource {
|
|
doc = "create " + subresource + " of" + article + 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)+operationSuffix).
|
|
Produces(append(storageMeta.ProducesMIMETypes(action.Verb), mediaTypes...)...).
|
|
Returns(http.StatusOK, "OK", producedObject).
|
|
// TODO: in some cases, the API may return a v1.Status instead of the versioned object
|
|
// but currently go-restful can't handle multiple different objects being returned.
|
|
Returns(http.StatusCreated, "Created", producedObject).
|
|
Returns(http.StatusAccepted, "Accepted", producedObject).
|
|
Reads(defaultVersionedObject).
|
|
Writes(producedObject)
|
|
if err := AddObjectParams(ws, route, versionedCreateOptions); err != nil {
|
|
return nil, err
|
|
}
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
case "DELETE": // Delete a resource.
|
|
article := GetArticleForNoun(kind, " ")
|
|
doc := "delete" + article + kind
|
|
if isSubresource {
|
|
doc = "delete " + subresource + " of" + article + kind
|
|
}
|
|
handler := metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, restfulDeleteResource(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)+operationSuffix).
|
|
Produces(append(storageMeta.ProducesMIMETypes(action.Verb), mediaTypes...)...).
|
|
Writes(versionedStatus).
|
|
Returns(http.StatusOK, "OK", versionedStatus).
|
|
Returns(http.StatusAccepted, "Accepted", versionedStatus)
|
|
if isGracefulDeleter {
|
|
route.Reads(versionedDeleterObject)
|
|
route.ParameterNamed("body").Required(false)
|
|
if err := AddObjectParams(ws, route, versionedDeleteOptions); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
case "DELETECOLLECTION":
|
|
doc := "delete collection of " + kind
|
|
if isSubresource {
|
|
doc = "delete collection of " + subresource + " of a " + kind
|
|
}
|
|
handler := metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, restfulDeleteCollection(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)+operationSuffix).
|
|
Produces(append(storageMeta.ProducesMIMETypes(action.Verb), mediaTypes...)...).
|
|
Writes(versionedStatus).
|
|
Returns(http.StatusOK, "OK", versionedStatus)
|
|
if err := AddObjectParams(ws, route, versionedListOptions); err != nil {
|
|
return nil, err
|
|
}
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
// deprecated in 1.11
|
|
case "WATCH": // Watch a resource.
|
|
doc := "watch changes to an object of kind " + kind
|
|
if isSubresource {
|
|
doc = "watch changes to " + subresource + " of an object of kind " + kind
|
|
}
|
|
doc += ". deprecated: use the 'watch' parameter with a list operation instead, filtered to a single item with the 'fieldSelector' parameter."
|
|
handler := metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, restfulListResource(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)+operationSuffix).
|
|
Produces(allMediaTypes...).
|
|
Returns(http.StatusOK, "OK", versionedWatchEvent).
|
|
Writes(versionedWatchEvent)
|
|
if err := AddObjectParams(ws, route, versionedListOptions); err != nil {
|
|
return nil, err
|
|
}
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
// deprecated in 1.11
|
|
case "WATCHLIST": // Watch all resources of a kind.
|
|
doc := "watch individual changes to a list of " + kind
|
|
if isSubresource {
|
|
doc = "watch individual changes to a list of " + subresource + " of " + kind
|
|
}
|
|
doc += ". deprecated: use the 'watch' parameter with a list operation instead."
|
|
handler := metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, restfulListResource(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"+operationSuffix).
|
|
Produces(allMediaTypes...).
|
|
Returns(http.StatusOK, "OK", versionedWatchEvent).
|
|
Writes(versionedWatchEvent)
|
|
if err := AddObjectParams(ws, route, versionedListOptions); err != nil {
|
|
return nil, err
|
|
}
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
case "CONNECT":
|
|
for _, method := range connecter.ConnectMethods() {
|
|
connectProducedObject := storageMeta.ProducesObject(method)
|
|
if connectProducedObject == nil {
|
|
connectProducedObject = "string"
|
|
}
|
|
doc := "connect " + method + " requests to " + kind
|
|
if isSubresource {
|
|
doc = "connect " + method + " requests to " + subresource + " of " + kind
|
|
}
|
|
handler := metrics.InstrumentRouteFunc(action.Verb, group, version, resource, subresource, requestScope, metrics.APIServerComponent, restfulConnectResource(connecter, reqScope, admit, path, isSubresource))
|
|
route := ws.Method(method).Path(action.Path).
|
|
To(handler).
|
|
Doc(doc).
|
|
Operation("connect" + strings.Title(strings.ToLower(method)) + namespaced + kind + strings.Title(subresource) + operationSuffix).
|
|
Produces("*/*").
|
|
Consumes("*/*").
|
|
Writes(connectProducedObject)
|
|
if versionedConnectOptions != nil {
|
|
if err := AddObjectParams(ws, route, versionedConnectOptions); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
addParams(route, action.Params)
|
|
routes = append(routes, route)
|
|
|
|
// transform ConnectMethods to kube verbs
|
|
if kubeVerb, found := toDiscoveryKubeVerb[method]; found {
|
|
if len(kubeVerb) != 0 {
|
|
kubeVerbs[kubeVerb] = struct{}{}
|
|
}
|
|
}
|
|
}
|
|
default:
|
|
return nil, fmt.Errorf("unrecognized action verb: %s", action.Verb)
|
|
}
|
|
for _, route := range routes {
|
|
route.Metadata(ROUTE_META_GVK, metav1.GroupVersionKind{
|
|
Group: reqScope.Kind.Group,
|
|
Version: reqScope.Kind.Version,
|
|
Kind: reqScope.Kind.Kind,
|
|
})
|
|
route.Metadata(ROUTE_META_ACTION, strings.ToLower(action.Verb))
|
|
ws.Route(route)
|
|
}
|
|
// Note: update GetAuthorizerAttributes() when adding a custom handler.
|
|
}
|
|
|
|
apiResource.Verbs = make([]string, 0, len(kubeVerbs))
|
|
for kubeVerb := range kubeVerbs {
|
|
apiResource.Verbs = append(apiResource.Verbs, kubeVerb)
|
|
}
|
|
sort.Strings(apiResource.Verbs)
|
|
|
|
if shortNamesProvider, ok := storage.(rest.ShortNamesProvider); ok {
|
|
apiResource.ShortNames = shortNamesProvider.ShortNames()
|
|
}
|
|
if categoriesProvider, ok := storage.(rest.CategoriesProvider); ok {
|
|
apiResource.Categories = categoriesProvider.Categories()
|
|
}
|
|
if gvkProvider, ok := storage.(rest.GroupVersionKindProvider); ok {
|
|
gvk := gvkProvider.GroupVersionKind(a.group.GroupVersion)
|
|
apiResource.Group = gvk.Group
|
|
apiResource.Version = gvk.Version
|
|
apiResource.Kind = gvk.Kind
|
|
}
|
|
|
|
return &apiResource, nil
|
|
}
|
|
|
|
// indirectArbitraryPointer returns *ptrToObject for an arbitrary pointer
|
|
func indirectArbitraryPointer(ptrToObject interface{}) interface{} {
|
|
return reflect.Indirect(reflect.ValueOf(ptrToObject)).Interface()
|
|
}
|
|
|
|
func appendIf(actions []action, a action, shouldAppend bool) []action {
|
|
if shouldAppend {
|
|
actions = append(actions, a)
|
|
}
|
|
return actions
|
|
}
|
|
|
|
func addParams(route *restful.RouteBuilder, params []*restful.Parameter) {
|
|
for _, param := range params {
|
|
route.Param(param)
|
|
}
|
|
}
|
|
|
|
// AddObjectParams converts a runtime.Object into a set of go-restful Param() definitions on the route.
|
|
// The object must be a pointer to a struct; only fields at the top level of the struct that are not
|
|
// themselves interfaces or structs are used; only fields with a json tag that is non empty (the standard
|
|
// Go JSON behavior for omitting a field) become query parameters. The name of the query parameter is
|
|
// the JSON field name. If a description struct tag is set on the field, that description is used on the
|
|
// query parameter. In essence, it converts a standard JSON top level object into a query param schema.
|
|
func AddObjectParams(ws *restful.WebService, route *restful.RouteBuilder, obj interface{}) error {
|
|
sv, err := conversion.EnforcePtr(obj)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
st := sv.Type()
|
|
switch st.Kind() {
|
|
case reflect.Struct:
|
|
for i := 0; i < st.NumField(); i++ {
|
|
name := st.Field(i).Name
|
|
sf, ok := st.FieldByName(name)
|
|
if !ok {
|
|
continue
|
|
}
|
|
switch sf.Type.Kind() {
|
|
case reflect.Interface, reflect.Struct:
|
|
case reflect.Ptr:
|
|
// TODO: This is a hack to let metav1.Time through. This needs to be fixed in a more generic way eventually. bug #36191
|
|
if (sf.Type.Elem().Kind() == reflect.Interface || sf.Type.Elem().Kind() == reflect.Struct) && strings.TrimPrefix(sf.Type.String(), "*") != "metav1.Time" {
|
|
continue
|
|
}
|
|
fallthrough
|
|
default:
|
|
jsonTag := sf.Tag.Get("json")
|
|
if len(jsonTag) == 0 {
|
|
continue
|
|
}
|
|
jsonName := strings.SplitN(jsonTag, ",", 2)[0]
|
|
if len(jsonName) == 0 {
|
|
continue
|
|
}
|
|
|
|
var desc string
|
|
if docable, ok := obj.(documentable); ok {
|
|
desc = docable.SwaggerDoc()[jsonName]
|
|
}
|
|
route.Param(ws.QueryParameter(jsonName, desc).DataType(typeToJSON(sf.Type.String())))
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// TODO: this is incomplete, expand as needed.
|
|
// Convert the name of a golang type to the name of a JSON type
|
|
func typeToJSON(typeName string) string {
|
|
switch typeName {
|
|
case "bool", "*bool":
|
|
return "boolean"
|
|
case "uint8", "*uint8", "int", "*int", "int32", "*int32", "int64", "*int64", "uint32", "*uint32", "uint64", "*uint64":
|
|
return "integer"
|
|
case "float64", "*float64", "float32", "*float32":
|
|
return "number"
|
|
case "metav1.Time", "*metav1.Time":
|
|
return "string"
|
|
case "byte", "*byte":
|
|
return "string"
|
|
case "v1.DeletionPropagation", "*v1.DeletionPropagation":
|
|
return "string"
|
|
|
|
// TODO: Fix these when go-restful supports a way to specify an array query param:
|
|
// https://github.com/emicklei/go-restful/issues/225
|
|
case "[]string", "[]*string":
|
|
return "string"
|
|
case "[]int32", "[]*int32":
|
|
return "integer"
|
|
|
|
default:
|
|
return typeName
|
|
}
|
|
}
|
|
|
|
// defaultStorageMetadata provides default answers to rest.StorageMetadata.
|
|
type defaultStorageMetadata struct{}
|
|
|
|
// defaultStorageMetadata implements rest.StorageMetadata
|
|
var _ rest.StorageMetadata = defaultStorageMetadata{}
|
|
|
|
func (defaultStorageMetadata) ProducesMIMETypes(verb string) []string {
|
|
return nil
|
|
}
|
|
|
|
func (defaultStorageMetadata) ProducesObject(verb string) interface{} {
|
|
return nil
|
|
}
|
|
|
|
// splitSubresource checks if the given storage path is the path of a subresource and returns
|
|
// the resource and subresource components.
|
|
func splitSubresource(path string) (string, string, error) {
|
|
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 "", "", fmt.Errorf("api_installer allows only one or two segment paths (resource or resource/subresource)")
|
|
}
|
|
return resource, subresource, nil
|
|
}
|
|
|
|
// GetArticleForNoun returns the article needed for the given noun.
|
|
func GetArticleForNoun(noun string, padding string) string {
|
|
if noun[len(noun)-2:] != "ss" && noun[len(noun)-1:] == "s" {
|
|
// Plurals don't have an article.
|
|
// Don't catch words like class
|
|
return fmt.Sprintf("%v", padding)
|
|
}
|
|
|
|
article := "a"
|
|
if isVowel(rune(noun[0])) {
|
|
article = "an"
|
|
}
|
|
|
|
return fmt.Sprintf("%s%s%s", padding, article, padding)
|
|
}
|
|
|
|
// isVowel returns true if the rune is a vowel (case insensitive).
|
|
func isVowel(c rune) bool {
|
|
vowels := []rune{'a', 'e', 'i', 'o', 'u'}
|
|
for _, value := range vowels {
|
|
if value == unicode.ToLower(c) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
func restfulListResource(r rest.Lister, rw rest.Watcher, scope handlers.RequestScope, forceWatch bool, minRequestTimeout time.Duration) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.ListResource(r, rw, scope, forceWatch, minRequestTimeout)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulCreateNamedResource(r rest.NamedCreater, scope handlers.RequestScope, admit admission.Interface) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.CreateNamedResource(r, scope, admit)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulCreateResource(r rest.Creater, scope handlers.RequestScope, admit admission.Interface) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.CreateResource(r, scope, admit)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulDeleteResource(r rest.GracefulDeleter, allowsOptions bool, scope handlers.RequestScope, admit admission.Interface) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.DeleteResource(r, allowsOptions, scope, admit)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulDeleteCollection(r rest.CollectionDeleter, checkBody bool, scope handlers.RequestScope, admit admission.Interface) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.DeleteCollection(r, checkBody, scope, admit)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulUpdateResource(r rest.Updater, scope handlers.RequestScope, admit admission.Interface) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.UpdateResource(r, scope, admit)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulPatchResource(r rest.Patcher, scope handlers.RequestScope, admit admission.Interface, supportedTypes []string) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.PatchResource(r, scope, admit, supportedTypes)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulGetResource(r rest.Getter, e rest.Exporter, scope handlers.RequestScope) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.GetResource(r, e, scope)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulGetResourceWithOptions(r rest.GetterWithOptions, scope handlers.RequestScope, isSubresource bool) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.GetResourceWithOptions(r, scope, isSubresource)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|
|
|
|
func restfulConnectResource(connecter rest.Connecter, scope handlers.RequestScope, admit admission.Interface, restPath string, isSubresource bool) restful.RouteFunction {
|
|
return func(req *restful.Request, res *restful.Response) {
|
|
handlers.ConnectResource(connecter, scope, admit, restPath, isSubresource)(res.ResponseWriter, req.Request)
|
|
}
|
|
}
|