| // Copyright 2012 Google Inc. All rights reserved. | |
| // Use of this source code is governed by the Apache 2.0 | |
| // license that can be found in the LICENSE file. | |
| package appengine | |
| import ( | |
| "context" | |
| "fmt" | |
| "regexp" | |
| "google.golang.org/appengine/internal" | |
| ) | |
| // Namespace returns a replacement context that operates within the given namespace. | |
| func Namespace(c context.Context, namespace string) (context.Context, error) { | |
| if !validNamespace.MatchString(namespace) { | |
| return nil, fmt.Errorf("appengine: namespace %q does not match /%s/", namespace, validNamespace) | |
| } | |
| return internal.NamespacedContext(c, namespace), nil | |
| } | |
| // validNamespace matches valid namespace names. | |
| var validNamespace = regexp.MustCompile(`^[0-9A-Za-z._-]{0,100}$`) |