// tryConvert attempts to convert the given object to the provided versions in order. This function assumes
// the object is in internal version.
func tryConvert(convertor runtime.ObjectConvertor, object runtime.Object, versions ...string) (runtime.Object, error) {
var last error
for _, version := range versions {
if len(version) == 0 {
return object, nil
}
obj, err := convertor.ConvertToVersion(object, version)
if err != nil {
last = err
continue
}
return obj, nil
}
return nil, last
}
// PatchResource returns a function that will handle a resource patch
// TODO: Eventually PatchResource should just use GuaranteedUpdate and this routine should be a bit cleaner
func PatchResource(r rest.Patcher, scope RequestScope, typer runtime.ObjectTyper, admit admission.Interface, converter runtime.ObjectConvertor) restful.RouteFunction {
return func(req *restful.Request, res *restful.Response) {
w := res.ResponseWriter
// TODO: we either want to remove timeout or document it (if we
// document, move timeout out of this function and declare it in
// api_installer)
timeout := parseTimeout(req.Request.URL.Query().Get("timeout"))
namespace, name, err := scope.Namer.Name(req)
if err != nil {
errorJSON(err, scope.Codec, w)
return
}
obj := r.New()
ctx := scope.ContextFunc(req)
ctx = api.WithNamespace(ctx, namespace)
// PATCH requires same permission as UPDATE
if admit.Handles(admission.Update) {
userInfo, _ := api.UserFrom(ctx)
err = admit.Admit(admission.NewAttributesRecord(obj, scope.Kind, namespace, scope.Resource, admission.Update, userInfo))
if err != nil {
errorJSON(err, scope.Codec, w)
return
}
}
versionedObj, err := converter.ConvertToVersion(obj, scope.APIVersion)
if err != nil {
errorJSON(err, scope.Codec, w)
return
}
original, err := r.Get(ctx, name)
if err != nil {
errorJSON(err, scope.Codec, w)
return
}
originalObjJS, err := scope.Codec.Encode(original)
if err != nil {
errorJSON(err, scope.Codec, w)
return
}
patchJS, err := readBody(req.Request)
if err != nil {
errorJSON(err, scope.Codec, w)
return
}
contentType := req.HeaderParameter("Content-Type")
patchedObjJS, err := getPatchedJS(contentType, originalObjJS, patchJS, versionedObj)
if err != nil {
errorJSON(err, scope.Codec, w)
return
}
if err := scope.Codec.DecodeInto(patchedObjJS, obj); err != nil {
errorJSON(err, scope.Codec, w)
return
}
if err := checkName(obj, name, namespace, scope.Namer); err != nil {
errorJSON(err, scope.Codec, w)
return
}
result, err := finishRequest(timeout, func() (runtime.Object, error) {
// update should never create as previous get would fail
obj, _, err := r.Update(ctx, obj)
return obj, err
})
if err != nil {
errorJSON(err, scope.Codec, w)
return
}
if err := setSelfLink(result, req, scope.Namer); err != nil {
errorJSON(err, scope.Codec, w)
return
}
write(http.StatusOK, scope.APIVersion, scope.Codec, result, w, req.Request)
}
}