mirror of
https://github.com/ceph/ceph-csi.git
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86 lines
2.6 KiB
Go
86 lines
2.6 KiB
Go
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/*
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Copyright 2017 The Kubernetes 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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"fmt"
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"net/http"
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"k8s.io/apimachinery/pkg/api/errors"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apiserver/pkg/endpoints/request"
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)
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// ScopeNamer handles accessing names from requests and objects
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type ScopeNamer interface {
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// Namespace returns the appropriate namespace value from the request (may be empty) or an
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// error.
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Namespace(req *http.Request) (namespace string, err error)
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// Name returns the name from the request, and an optional namespace value if this is a namespace
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// scoped call. An error is returned if the name is not available.
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Name(req *http.Request) (namespace, name string, err error)
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// ObjectName returns the namespace and name from an object if they exist, or an error if the object
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// does not support names.
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ObjectName(obj runtime.Object) (namespace, name string, err error)
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}
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type ContextBasedNaming struct {
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Namer runtime.Namer
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ClusterScoped bool
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}
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// ContextBasedNaming implements ScopeNamer
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var _ ScopeNamer = ContextBasedNaming{}
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func (n ContextBasedNaming) Namespace(req *http.Request) (namespace string, err error) {
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requestInfo, ok := request.RequestInfoFrom(req.Context())
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if !ok {
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return "", fmt.Errorf("missing requestInfo")
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}
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return requestInfo.Namespace, nil
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}
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func (n ContextBasedNaming) Name(req *http.Request) (namespace, name string, err error) {
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requestInfo, ok := request.RequestInfoFrom(req.Context())
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if !ok {
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return "", "", fmt.Errorf("missing requestInfo")
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}
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if len(requestInfo.Name) == 0 {
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return "", "", errEmptyName
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}
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return requestInfo.Namespace, requestInfo.Name, nil
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}
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func (n ContextBasedNaming) ObjectName(obj runtime.Object) (namespace, name string, err error) {
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name, err = n.Namer.Name(obj)
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if err != nil {
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return "", "", err
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}
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if len(name) == 0 {
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return "", "", errEmptyName
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}
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namespace, err = n.Namer.Namespace(obj)
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if err != nil {
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return "", "", err
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}
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return namespace, name, err
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}
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// errEmptyName is returned when API requests do not fill the name section of the path.
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var errEmptyName = errors.NewBadRequest("name must be provided")
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