app/soc/views/helper/decorators.py

#!/usr/bin/env python2.5
#
# Copyright 2008 the Melange authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""Views decorators.
"""


from functools import wraps

from django import http


def mutation(func):
  """This decorator indicates that the view is a mutation operation and is
  therefore restricted to POST requests.

  XSRF checking is performed automatically by the xsrf middleware.
  """
  @wraps(func)
  def wrapper(self, request, *args, **kwargs):
    if request.method != "POST":
      return http.HttpResponse("Invoked a mutation view w/o POST.", status=403)

    return func(self, request, *args, **kwargs)

  return wrapper