/
codec.go
90 lines (81 loc) · 3.33 KB
/
codec.go
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/*
* Tencent is pleased to support the open source community by making TKEStack
* available.
*
* Copyright (C) 2012-2019 Tencent. All Rights Reserved.
*
* 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
*
* https://opensource.org/licenses/Apache-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 OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package codec
import (
"fmt"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/runtime/serializer"
"tkestack.io/tke/pkg/apiserver"
auditconfig "tkestack.io/tke/pkg/audit/apis/config"
auditscheme "tkestack.io/tke/pkg/audit/apis/config/scheme"
)
// EncodeAuditConfig encodes an internal AuditConfiguration to an external YAML representation
func EncodeAuditConfig(internal *auditconfig.AuditConfiguration, targetVersion schema.GroupVersion) ([]byte, error) {
encoder, err := NewAuditConfigYAMLEncoder(targetVersion)
if err != nil {
return nil, err
}
// encoder will convert to external version
data, err := runtime.Encode(encoder, internal)
if err != nil {
return nil, err
}
return data, nil
}
// NewAuditConfigYAMLEncoder returns an encoder that can write objects in the auditconfig API group to YAML
func NewAuditConfigYAMLEncoder(targetVersion schema.GroupVersion) (runtime.Encoder, error) {
_, codecs, err := auditscheme.NewSchemeAndCodecs()
if err != nil {
return nil, err
}
mediaType := "application/yaml"
info, ok := runtime.SerializerInfoForMediaType(codecs.SupportedMediaTypes(), mediaType)
if !ok {
return nil, fmt.Errorf("unsupported media type %q", mediaType)
}
return codecs.EncoderForVersion(info.Serializer, targetVersion), nil
}
// NewYAMLEncoder generates a new runtime.Encoder that encodes objects to YAML
func NewYAMLEncoder(groupName string) (runtime.Encoder, error) {
// encode to YAML
mediaType := "application/yaml"
info, ok := runtime.SerializerInfoForMediaType(apiserver.Codecs.SupportedMediaTypes(), mediaType)
if !ok {
return nil, fmt.Errorf("unsupported media type %q", mediaType)
}
versions := apiserver.Scheme.PrioritizedVersionsForGroup(groupName)
if len(versions) == 0 {
return nil, fmt.Errorf("no enabled versions for group %q", groupName)
}
// the "best" version supposedly comes first in the list returned from apiserver.Registry.EnabledVersionsForGroup
return apiserver.Codecs.EncoderForVersion(info.Serializer, versions[0]), nil
}
// DecodeAuditConfiguration decodes a serialized AuditConfiguration to the internal type
func DecodeAuditConfiguration(auditCodecs *serializer.CodecFactory, data []byte) (*auditconfig.AuditConfiguration, error) {
// the UniversalDecoder runs defaulting and returns the internal type by default
obj, gvk, err := auditCodecs.UniversalDecoder().Decode(data, nil, nil)
if err != nil {
return nil, fmt.Errorf("failed to decode, error: %v", err)
}
internalKC, ok := obj.(*auditconfig.AuditConfiguration)
if !ok {
return nil, fmt.Errorf("failed to cast object to AuditConfiguration, unexpected type: %v", gvk)
}
return internalKC, nil
}