mirror of
https://github.com/ceph/ceph-csi.git
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79 lines
2.4 KiB
Go
79 lines
2.4 KiB
Go
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/*
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Copyright 2014 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 request
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import (
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"context"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apiserver/pkg/authentication/user"
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)
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// The key type is unexported to prevent collisions
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type key int
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const (
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// namespaceKey is the context key for the request namespace.
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namespaceKey key = iota
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// userKey is the context key for the request user.
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userKey
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)
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// NewContext instantiates a base context object for request flows.
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func NewContext() context.Context {
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return context.TODO()
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}
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// NewDefaultContext instantiates a base context object for request flows in the default namespace
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func NewDefaultContext() context.Context {
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return WithNamespace(NewContext(), metav1.NamespaceDefault)
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}
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// WithValue returns a copy of parent in which the value associated with key is val.
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func WithValue(parent context.Context, key interface{}, val interface{}) context.Context {
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return context.WithValue(parent, key, val)
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}
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// WithNamespace returns a copy of parent in which the namespace value is set
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func WithNamespace(parent context.Context, namespace string) context.Context {
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return WithValue(parent, namespaceKey, namespace)
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}
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// NamespaceFrom returns the value of the namespace key on the ctx
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func NamespaceFrom(ctx context.Context) (string, bool) {
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namespace, ok := ctx.Value(namespaceKey).(string)
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return namespace, ok
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}
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// NamespaceValue returns the value of the namespace key on the ctx, or the empty string if none
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func NamespaceValue(ctx context.Context) string {
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namespace, _ := NamespaceFrom(ctx)
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return namespace
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}
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// WithUser returns a copy of parent in which the user value is set
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func WithUser(parent context.Context, user user.Info) context.Context {
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return WithValue(parent, userKey, user)
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}
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// UserFrom returns the value of the user key on the ctx
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func UserFrom(ctx context.Context) (user.Info, bool) {
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user, ok := ctx.Value(userKey).(user.Info)
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return user, ok
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}
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