kubernetes metadata_decoder 源码
kubernetes metadata_decoder 代码
文件路径：/staging/src/k8s.io/cli-runtime/pkg/resource/metadata_decoder.go
/*
Copyright 2019 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 resource
import (
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
utiljson "k8s.io/apimachinery/pkg/util/json"
)
// metadataValidatingDecoder wraps a decoder and additionally ensures metadata schema fields decode before returning an unstructured object
type metadataValidatingDecoder struct {
decoder runtime.Decoder
}
func (m *metadataValidatingDecoder) Decode(data []byte, defaults *schema.GroupVersionKind, into runtime.Object) (runtime.Object, *schema.GroupVersionKind, error) {
obj, gvk, err := m.decoder.Decode(data, defaults, into)
// if we already errored, return
if err != nil {
return obj, gvk, err
}
// if we're not unstructured, return
if _, isUnstructured := obj.(runtime.Unstructured); !isUnstructured {
return obj, gvk, err
}
// make sure the data can decode into ObjectMeta before we return,
// so we don't silently truncate schema errors in metadata later with accesser get/set calls
v := &metadataOnlyObject{}
if typedErr := utiljson.Unmarshal(data, v); typedErr != nil {
return obj, gvk, typedErr
}
return obj, gvk, err
}
type metadataOnlyObject struct {
metav1.TypeMeta `json:",inline"`
metav1.ObjectMeta `json:"metadata,omitempty"`
}
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