mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-24 15:20:19 +00:00
77 lines
2.7 KiB
Go
77 lines
2.7 KiB
Go
|
/*
|
||
|
|
Copyright 2018 The Kubernetes Authors.
|
||
|
|
|
||
|
|
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 admission
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
|
||
|
|
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
|
||
|
|
"k8s.io/apimachinery/pkg/runtime"
|
||
|
|
"k8s.io/apimachinery/pkg/runtime/serializer"
|
||
|
|
"k8s.io/apimachinery/pkg/util/json"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Decoder knows how to decode the contents of an admission
|
||
|
|
// request into a concrete object.
|
||
|
|
type Decoder struct {
|
||
|
|
codecs serializer.CodecFactory
|
||
|
|
}
|
||
|
|
|
||
|
|
// NewDecoder creates a Decoder given the runtime.Scheme
|
||
|
|
func NewDecoder(scheme *runtime.Scheme) (*Decoder, error) {
|
||
|
|
return &Decoder{codecs: serializer.NewCodecFactory(scheme)}, nil
|
||
|
|
}
|
||
|
|
|
||
|
|
// Decode decodes the inlined object in the AdmissionRequest into the passed-in runtime.Object.
|
||
|
|
// If you want decode the OldObject in the AdmissionRequest, use DecodeRaw.
|
||
|
|
// It errors out if req.Object.Raw is empty i.e. containing 0 raw bytes.
|
||
|
|
func (d *Decoder) Decode(req Request, into runtime.Object) error {
|
||
|
|
// we error out if rawObj is an empty object.
|
||
|
|
if len(req.Object.Raw) == 0 {
|
||
|
|
return fmt.Errorf("there is no content to decode")
|
||
|
|
}
|
||
|
|
return d.DecodeRaw(req.Object, into)
|
||
|
|
}
|
||
|
|
|
||
|
|
// DecodeRaw decodes a RawExtension object into the passed-in runtime.Object.
|
||
|
|
// It errors out if rawObj is empty i.e. containing 0 raw bytes.
|
||
|
|
func (d *Decoder) DecodeRaw(rawObj runtime.RawExtension, into runtime.Object) error {
|
||
|
|
// NB(directxman12): there's a bug/weird interaction between decoders and
|
||
|
|
// the API server where the API server doesn't send a GVK on the embedded
|
||
|
|
// objects, which means the unstructured decoder refuses to decode. It
|
||
|
|
// also means we can't pass the unstructured directly in, since it'll try
|
||
|
|
// and call unstructured's special Unmarshal implementation, which calls
|
||
|
|
// back into that same decoder :-/
|
||
|
|
// See kubernetes/kubernetes#74373.
|
||
|
|
|
||
|
|
// we error out if rawObj is an empty object.
|
||
|
|
if len(rawObj.Raw) == 0 {
|
||
|
|
return fmt.Errorf("there is no content to decode")
|
||
|
|
}
|
||
|
|
if unstructuredInto, isUnstructured := into.(*unstructured.Unstructured); isUnstructured {
|
||
|
|
// unmarshal into unstructured's underlying object to avoid calling the decoder
|
||
|
|
if err := json.Unmarshal(rawObj.Raw, &unstructuredInto.Object); err != nil {
|
||
|
|
return err
|
||
|
|
}
|
||
|
|
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
deserializer := d.codecs.UniversalDeserializer()
|
||
|
|
return runtime.DecodeInto(deserializer, rawObj.Raw, into)
|
||
|
|
}
|