mirror of https://github.com/grafana/grafana.git
104 lines
2.6 KiB
Go
104 lines
2.6 KiB
Go
package dashboard
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import (
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"context"
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"fmt"
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"net/http"
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"strconv"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/apiserver/pkg/registry/rest"
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"k8s.io/apiserver/pkg/storage"
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"github.com/grafana/grafana/pkg/services/apiserver/endpoints/request"
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"github.com/grafana/grafana/pkg/storage/unified/resource"
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)
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// LatestConnector will return the latest version of the resource - even if it is deleted
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type LatestConnector interface {
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rest.Storage
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rest.Connecter
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rest.StorageMetadata
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}
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func NewLatestConnector(unified resource.ResourceClient, gr schema.GroupResource) LatestConnector {
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return &latestREST{
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unified: unified,
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gr: gr,
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}
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}
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type latestREST struct {
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unified resource.ResourceClient
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gr schema.GroupResource
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}
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func (l *latestREST) New() runtime.Object {
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return &metav1.PartialObjectMetadataList{}
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}
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func (l *latestREST) Destroy() {
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}
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func (l *latestREST) ConnectMethods() []string {
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return []string{"GET"}
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}
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func (l *latestREST) ProducesMIMETypes(verb string) []string {
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return nil
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}
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func (l *latestREST) ProducesObject(verb string) interface{} {
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return &metav1.PartialObjectMetadataList{}
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}
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func (l *latestREST) NewConnectOptions() (runtime.Object, bool, string) {
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return nil, false, ""
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}
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func (l *latestREST) Connect(ctx context.Context, uid string, opts runtime.Object, responder rest.Responder) (http.Handler, error) {
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info, err := request.NamespaceInfoFrom(ctx, true)
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if err != nil {
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return nil, err
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}
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key := &resource.ResourceKey{
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Namespace: info.Value,
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Group: l.gr.Group,
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Resource: l.gr.Resource,
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Name: uid,
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}
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return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
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rsp, err := l.unified.Read(ctx, &resource.ReadRequest{
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Key: key,
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ResourceVersion: 0, // 0 will return the latest version that was not a delete event
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IncludeDeleted: true,
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})
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if err != nil {
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responder.Error(err)
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return
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} else if rsp == nil || (rsp.Error != nil && rsp.Error.Code == http.StatusNotFound) {
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responder.Error(storage.NewKeyNotFoundError(uid, 0))
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return
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} else if rsp.Error != nil {
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responder.Error(fmt.Errorf("could not retrieve object: %s", rsp.Error.Message))
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return
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}
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uncastObj, err := runtime.Decode(unstructured.UnstructuredJSONScheme, rsp.Value)
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if err != nil {
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responder.Error(fmt.Errorf("could not convert object: %s", err.Error()))
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return
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}
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finalObj := uncastObj.(*unstructured.Unstructured)
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finalObj.SetResourceVersion(strconv.FormatInt(rsp.ResourceVersion, 10))
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responder.Object(http.StatusOK, finalObj)
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}), nil
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}
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