Matthias Andreas Benkard | 832a54e | 2019-01-29 09:27:38 +0100 | [diff] [blame] | 1 | /* |
| 2 | Copyright 2015 The Kubernetes Authors. |
| 3 | |
| 4 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | you may not use this file except in compliance with the License. |
| 6 | You may obtain a copy of the License at |
| 7 | |
| 8 | http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | |
| 10 | Unless required by applicable law or agreed to in writing, software |
| 11 | distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | See the License for the specific language governing permissions and |
| 14 | limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package admission |
| 18 | |
| 19 | import ( |
| 20 | apierrors "k8s.io/apimachinery/pkg/api/errors" |
| 21 | "k8s.io/apimachinery/pkg/api/meta" |
| 22 | "k8s.io/apimachinery/pkg/runtime/schema" |
| 23 | utilerrors "k8s.io/apimachinery/pkg/util/errors" |
| 24 | ) |
| 25 | |
| 26 | func extractResourceName(a Attributes) (name string, resource schema.GroupResource, err error) { |
| 27 | resource = a.GetResource().GroupResource() |
| 28 | |
| 29 | if len(a.GetName()) > 0 { |
| 30 | return a.GetName(), resource, nil |
| 31 | } |
| 32 | |
| 33 | name = "Unknown" |
| 34 | obj := a.GetObject() |
| 35 | if obj != nil { |
| 36 | accessor, err := meta.Accessor(obj) |
| 37 | if err != nil { |
| 38 | // not all object have ObjectMeta. If we don't, return a name with a slash (always illegal) |
| 39 | return "Unknown/errorGettingName", resource, nil |
| 40 | } |
| 41 | |
| 42 | // this is necessary because name object name generation has not occurred yet |
| 43 | if len(accessor.GetName()) > 0 { |
| 44 | name = accessor.GetName() |
| 45 | } else if len(accessor.GetGenerateName()) > 0 { |
| 46 | name = accessor.GetGenerateName() |
| 47 | } |
| 48 | } |
| 49 | return name, resource, nil |
| 50 | } |
| 51 | |
| 52 | // NewForbidden is a utility function to return a well-formatted admission control error response |
| 53 | func NewForbidden(a Attributes, internalError error) error { |
| 54 | // do not double wrap an error of same type |
| 55 | if apierrors.IsForbidden(internalError) { |
| 56 | return internalError |
| 57 | } |
| 58 | name, resource, err := extractResourceName(a) |
| 59 | if err != nil { |
| 60 | return apierrors.NewInternalError(utilerrors.NewAggregate([]error{internalError, err})) |
| 61 | } |
| 62 | return apierrors.NewForbidden(resource, name, internalError) |
| 63 | } |
| 64 | |
| 65 | // NewNotFound is a utility function to return a well-formatted admission control error response |
| 66 | func NewNotFound(a Attributes) error { |
| 67 | name, resource, err := extractResourceName(a) |
| 68 | if err != nil { |
| 69 | return apierrors.NewInternalError(err) |
| 70 | } |
| 71 | return apierrors.NewNotFound(resource, name) |
| 72 | } |