# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright 2010 OpenStack LLC.
# All Rights Reserved.
#
#    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.

import hashlib
import os
import time

import webob.dec
import webob.exc

from nova.api.openstack import common
from nova.api.openstack import wsgi
from nova import auth
from nova import context
from nova import exception
from nova import flags
from nova import log as logging
from nova import utils
from nova import wsgi as base_wsgi

LOG = logging.getLogger('nova.api.openstack.compute.auth')
FLAGS = flags.FLAGS
flags.DECLARE('use_forwarded_for', 'nova.api.auth')


class NoAuthMiddleware(base_wsgi.Middleware):
    """Return a fake token if one isn't specified."""

    @webob.dec.wsgify(RequestClass=wsgi.Request)
    def __call__(self, req):
        if 'X-Auth-Token' not in req.headers:
            user_id = req.headers.get('X-Auth-User', 'admin')
            project_id = req.headers.get('X-Auth-Project-Id', 'admin')
            os_url = os.path.join(req.url, project_id)
            res = webob.Response()
            # NOTE(vish): This is expecting and returning Auth(1.1), whereas
            #             keystone uses 2.0 auth.  We should probably allow
            #             2.0 auth here as well.
            res.headers['X-Auth-Token'] = '%s:%s' % (user_id, project_id)
            res.headers['X-Server-Management-Url'] = os_url
            res.headers['X-Storage-Url'] = ''
            res.headers['X-CDN-Management-Url'] = ''
            res.content_type = 'text/plain'
            res.status = '204'