/
utils.go
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/
utils.go
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// Copyright (c) 2020 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package seedadmission
import (
"context"
"encoding/json"
kutil "github.com/gardener/gardener/pkg/utils/kubernetes"
admissionv1beta1 "k8s.io/api/admission/v1beta1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
)
func getRequestObject(ctx context.Context, c client.Client, request *admissionv1beta1.AdmissionRequest) (runtime.Object, error) {
// Older Kubernetes versions don't provide the object neither in OldObject nor in the Object field. In this case
// we have to look it up ourselves.
var (
obj runtime.Object
err error
)
switch {
case request.OldObject.Raw != nil:
o := &unstructured.Unstructured{}
err = json.Unmarshal(request.OldObject.Raw, o)
obj = o
case request.Object.Raw != nil:
o := &unstructured.Unstructured{}
err = json.Unmarshal(request.Object.Raw, o)
obj = o
case request.Name == "":
o := &unstructured.UnstructuredList{}
o.SetAPIVersion(request.Kind.Group + "/" + request.Kind.Version)
o.SetKind(request.Kind.Kind + "List")
err = c.List(ctx, o, client.InNamespace(request.Namespace))
obj = o
default:
o := &unstructured.Unstructured{}
o.SetAPIVersion(request.Kind.Group + "/" + request.Kind.Version)
o.SetKind(request.Kind.Kind)
err = c.Get(ctx, kutil.Key(request.Namespace, request.Name), o)
obj = o
}
return obj, err
}