271 lines
8.9 KiB
Python
271 lines
8.9 KiB
Python
# Copyright 2012 Managed I.T.
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#
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# Author: Kiall Mac Innes <kiall@managedit.ie>
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import flask
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import webob.dec
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from oslo.config import cfg
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from oslo import messaging
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from oslo.middleware import base
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from oslo.middleware import request_id
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from oslo.serialization import jsonutils as json
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from oslo.utils import strutils
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from designate import exceptions
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from designate import notifications
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from designate import context
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from designate.openstack.common import log as logging
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from designate.i18n import _LI
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from designate.i18n import _LW
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from designate.i18n import _LE
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from designate.i18n import _LC
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LOG = logging.getLogger(__name__)
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cfg.CONF.register_opts([
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cfg.BoolOpt('maintenance-mode', default=False,
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help='Enable API Maintenance Mode'),
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cfg.StrOpt('maintenance-mode-role', default='admin',
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help='Role allowed to bypass maintaince mode'),
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], group='service:api')
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def auth_pipeline_factory(loader, global_conf, **local_conf):
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"""
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A paste pipeline replica that keys off of auth_strategy.
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Code nabbed from cinder.
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"""
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pipeline = local_conf[cfg.CONF['service:api'].auth_strategy]
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pipeline = pipeline.split()
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LOG.info(_LI('Getting auth pipeline: %s') % pipeline[:-1])
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filters = [loader.get_filter(n) for n in pipeline[:-1]]
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app = loader.get_app(pipeline[-1])
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filters.reverse()
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for filter in filters:
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app = filter(app)
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return app
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class ContextMiddleware(base.Middleware):
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def make_context(self, request, *args, **kwargs):
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req_id = request.environ.get(request_id.ENV_REQUEST_ID)
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kwargs.setdefault('request_id', req_id)
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ctxt = context.DesignateContext(*args, **kwargs)
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headers = request.headers
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params = request.params
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if headers.get('X-Auth-All-Projects'):
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ctxt.all_tenants = \
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strutils.bool_from_string(headers.get('X-Auth-All-Projects'))
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elif 'all_projects' in params:
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ctxt.all_tenants = \
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strutils.bool_from_string(params['all_projects'])
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elif 'all_tenants' in params:
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ctxt.all_tenants = \
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strutils.bool_from_string(params['all_tenants'])
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else:
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ctxt.all_tenants = False
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request.environ['context'] = ctxt
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return ctxt
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class KeystoneContextMiddleware(ContextMiddleware):
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def __init__(self, application):
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super(KeystoneContextMiddleware, self).__init__(application)
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LOG.info(_LI('Starting designate keystonecontext middleware'))
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def process_request(self, request):
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headers = request.headers
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try:
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if headers['X-Identity-Status'] is 'Invalid':
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# TODO(graham) fix the return to use non-flask resources
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return flask.Response(status=401)
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except KeyError:
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# If the key is valid, Keystone does not include this header at all
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pass
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if headers.get('X-Service-Catalog'):
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catalog = json.loads(headers.get('X-Service-Catalog'))
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else:
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catalog = None
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roles = headers.get('X-Roles').split(',')
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self.make_context(
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request,
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auth_token=headers.get('X-Auth-Token'),
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user=headers.get('X-User-ID'),
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tenant=headers.get('X-Tenant-ID'),
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roles=roles,
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service_catalog=catalog)
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class NoAuthContextMiddleware(ContextMiddleware):
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def __init__(self, application):
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super(NoAuthContextMiddleware, self).__init__(application)
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LOG.info(_LI('Starting designate noauthcontext middleware'))
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def process_request(self, request):
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headers = request.headers
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self.make_context(
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request,
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auth_token=headers.get('X-Auth-Token', None),
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user=headers.get('X-Auth-User-ID', 'noauth-user'),
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tenant=headers.get('X-Auth-Project-ID', 'noauth-project'),
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roles=headers.get('X-Roles', 'admin').split(',')
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)
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class TestContextMiddleware(ContextMiddleware):
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def __init__(self, application, tenant_id=None, user_id=None):
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super(TestContextMiddleware, self).__init__(application)
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LOG.critical(_LC('Starting designate testcontext middleware'))
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LOG.critical(_LC('**** DO NOT USE IN PRODUCTION ****'))
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self.default_tenant_id = tenant_id
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self.default_user_id = user_id
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def process_request(self, request):
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headers = request.headers
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all_tenants = strutils.bool_from_string(
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headers.get('X-Test-All-Tenants', 'False'))
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self.make_context(
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request,
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user=headers.get('X-Test-User-ID', self.default_user_id),
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tenant=headers.get('X-Test-Tenant-ID', self.default_tenant_id),
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all_tenants=all_tenants)
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class MaintenanceMiddleware(base.Middleware):
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def __init__(self, application):
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super(MaintenanceMiddleware, self).__init__(application)
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LOG.info(_LI('Starting designate maintenance middleware'))
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self.enabled = cfg.CONF['service:api'].maintenance_mode
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self.role = cfg.CONF['service:api'].maintenance_mode_role
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def process_request(self, request):
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# If maintaince mode is not enabled, pass the request on as soon as
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# possible
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if not self.enabled:
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return None
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# If the caller has the bypass role, let them through
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if ('context' in request.environ
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and self.role in request.environ['context'].roles):
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LOG.warn(_LW('Request authorized to bypass maintenance mode'))
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return None
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# Otherwise, reject the request with a 503 Service Unavailable
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return flask.Response(status=503, headers={'Retry-After': 60})
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class NormalizeURIMiddleware(base.Middleware):
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@webob.dec.wsgify
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def __call__(self, request):
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# Remove any trailing /'s.
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request.environ['PATH_INFO'] = request.environ['PATH_INFO'].rstrip('/')
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return request.get_response(self.application)
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class FaultWrapperMiddleware(base.Middleware):
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def __init__(self, application):
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super(FaultWrapperMiddleware, self).__init__(application)
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LOG.info(_LI('Starting designate faultwrapper middleware'))
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@webob.dec.wsgify
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def __call__(self, request):
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try:
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return request.get_response(self.application)
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except exceptions.Base as e:
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# Handle Designate Exceptions
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status = e.error_code if hasattr(e, 'error_code') else 500
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# Start building up a response
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response = {
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'code': status
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}
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if e.error_type:
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response['type'] = e.error_type
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if e.error_message:
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response['message'] = e.error_message
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if e.errors:
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response['errors'] = e.errors
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return self._handle_exception(request, e, status, response)
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except messaging.MessagingTimeout as e:
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# Special case for RPC timeout's
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response = {
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'code': 504,
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'type': 'timeout',
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}
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return self._handle_exception(request, e, 504, response)
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except Exception as e:
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# Handle all other exception types
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return self._handle_exception(request, e)
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def _handle_exception(self, request, e, status=500, response=None):
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response = response or {}
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# Log the exception ASAP unless it is a 404 Not Found
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if not getattr(e, 'expected', False):
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LOG.exception(e)
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headers = [
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('Content-Type', 'application/json'),
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]
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url = getattr(request, 'url', None)
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# Set a response code and type, if they are missing.
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if 'code' not in response:
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response['code'] = status
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if 'type' not in response:
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response['type'] = 'unknown'
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# Return the new response
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if 'context' in request.environ:
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response['request_id'] = request.environ['context'].request_id
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notifications.send_api_fault(request.environ['context'], url,
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response['code'], e)
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else:
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# TODO(ekarlso): Remove after verifying that there's actually a
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# context always set
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LOG.error(_LE('Missing context in request, please check.'))
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return flask.Response(status=status, headers=headers,
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response=json.dumps(response))
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