120 lines
4.1 KiB
Go
120 lines
4.1 KiB
Go
/*
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Copyright 2020 The cert-manager 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 handlers
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import (
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"bytes"
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"fmt"
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"net/http"
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apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
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apiextensionsv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
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"github.com/go-logr/logr"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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apijson "k8s.io/apimachinery/pkg/runtime/serializer/json"
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"k8s.io/apimachinery/pkg/runtime/serializer/versioning"
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logf "github.com/jetstack/cert-manager/pkg/logs"
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)
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type SchemeBackedConverter struct {
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log logr.Logger
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scheme *runtime.Scheme
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serializer *apijson.Serializer
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}
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var _ ConversionHook = &SchemeBackedConverter{}
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func NewSchemeBackedConverter(log logr.Logger, scheme *runtime.Scheme) *SchemeBackedConverter {
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serializer := apijson.NewSerializerWithOptions(apijson.DefaultMetaFactory, scheme, scheme, apijson.SerializerOptions{})
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return &SchemeBackedConverter{
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log: log,
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scheme: scheme,
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serializer: serializer,
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}
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}
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func (c *SchemeBackedConverter) convertObjects(desiredAPIVersion string, objects []runtime.RawExtension) ([]runtime.RawExtension, error) {
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desiredGV, err := schema.ParseGroupVersion(desiredAPIVersion)
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if err != nil {
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return nil, fmt.Errorf("Failed to parse desired apiVersion: %v", err)
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}
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c.log.V(logf.DebugLevel).Info("Parsed desired groupVersion", "desired_group_version", desiredGV)
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groupVersioner := schema.GroupVersions([]schema.GroupVersion{desiredGV})
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codec := versioning.NewCodec(
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c.serializer,
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c.serializer,
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runtime.UnsafeObjectConvertor(c.scheme),
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c.scheme,
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c.scheme,
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nil,
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groupVersioner,
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runtime.InternalGroupVersioner, c.scheme.Name(),
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)
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convertedObjects := make([]runtime.RawExtension, len(objects))
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for i, raw := range objects {
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decodedObject, currentGVK, err := codec.Decode(raw.Raw, nil, nil)
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if err != nil {
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return nil, fmt.Errorf("Failed to decode into apiVersion: %v", err)
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}
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c.log.V(logf.DebugLevel).Info("Decoded resource", "decoded_group_version_kind", currentGVK)
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buf := bytes.Buffer{}
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if err := codec.Encode(decodedObject, &buf); err != nil {
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return nil, fmt.Errorf("Failed to convert to desired apiVersion: %v", err)
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}
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convertedObjects[i] = runtime.RawExtension{Raw: buf.Bytes()}
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}
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return convertedObjects, nil
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}
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func (c *SchemeBackedConverter) ConvertV1(conversionSpec *apiextensionsv1.ConversionRequest) *apiextensionsv1.ConversionResponse {
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result := metav1.Status{Status: metav1.StatusSuccess}
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convertedObjects, err := c.convertObjects(conversionSpec.DesiredAPIVersion, conversionSpec.Objects)
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if err != nil {
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result.Status = metav1.StatusFailure
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result.Code = http.StatusBadRequest
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result.Reason = metav1.StatusReasonBadRequest
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result.Message = err.Error()
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}
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return &apiextensionsv1.ConversionResponse{
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UID: conversionSpec.UID,
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ConvertedObjects: convertedObjects,
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Result: result,
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}
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}
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func (c *SchemeBackedConverter) ConvertV1Beta1(conversionSpec *apiextensionsv1beta1.ConversionRequest) *apiextensionsv1beta1.ConversionResponse {
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result := metav1.Status{Status: metav1.StatusSuccess}
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convertedObjects, err := c.convertObjects(conversionSpec.DesiredAPIVersion, conversionSpec.Objects)
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if err != nil {
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result.Status = metav1.StatusFailure
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result.Code = http.StatusBadRequest
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result.Reason = metav1.StatusReasonBadRequest
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result.Message = err.Error()
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}
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return &apiextensionsv1beta1.ConversionResponse{
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UID: conversionSpec.UID,
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ConvertedObjects: convertedObjects,
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Result: result,
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}
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}
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