vendor/google.golang.org/appengine/namespace.go

   1 // Copyright 2012 Google Inc. All rights reserved.
   2 // Use of this source code is governed by the Apache 2.0
   3 // license that can be found in the LICENSE file.
   4
   5 package appengine
   6
   7 import (
   8         "fmt"
   9         "regexp"
  10
  11         "golang.org/x/net/context"
  12
  13         "google.golang.org/appengine/internal"
  14 )
  15
  16 // Namespace returns a replacement context that operates within the given namespace.
  17 func Namespace(c context.Context, namespace string) (context.Context, error) {
  18         if !validNamespace.MatchString(namespace) {
  19                 return nil, fmt.Errorf("appengine: namespace %q does not match /%s/", namespace, validNamespace)
  20         }
  21         return internal.NamespacedContext(c, namespace), nil
  22 }
  23
  24 // validNamespace matches valid namespace names.
  25 var validNamespace = regexp.MustCompile(`^[0-9A-Za-z._-]{0,100}$`)