Add refresh support to the console page.

utils.py

+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""Utils."""
+
+from google.appengine.api import users
+
+
+def admin_only(func):
+  """Valid for BasePage objects only."""
+  def decorated(self, *args, **kwargs):
+    if self.is_admin:
+      return func(self, *args, **kwargs)
+    else:
+      self.response.headers['Content-Type'] = 'text/plain'
+      self.response.out.write('Forbidden')
+      self.error(403)
+  return decorated
+
+
+def clean_int(value, default):
+  """Convert a value to an int, or the default value if conversion fails."""
+  try:
+    return int(value)
+  except (TypeError, ValueError):
+    return default
+
+
+def require_user(func):
+  """A user must be logged in."""
+  def decorated(self, *args, **kwargs):
+    if not self.user:
+      self.redirect(users.create_login_url(self.request.url))
+    else:
+      return func(self, *args, **kwargs)
+  return decorated