160 lines
5.5 KiB
Python
160 lines
5.5 KiB
Python
# -*- encoding: utf-8 -*-
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#
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# Copyright © 2012 New Dream Network, LLC (DreamHost)
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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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from oslo_config import cfg
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from pecan import hooks
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from webob import exc
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from iotronic.common import context
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from iotronic.common import policy
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from iotronic.conductor import rpcapi
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from iotronic.db import api as dbapi
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class ConfigHook(hooks.PecanHook):
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"""Attach the config object to the request so controllers can get to it."""
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def before(self, state):
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state.request.cfg = cfg.CONF
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class DBHook(hooks.PecanHook):
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"""Attach the dbapi object to the request so controllers can get to it."""
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def before(self, state):
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#state.request.dbapi = dbapi.get_instance()
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pass
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class ContextHook(hooks.PecanHook):
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"""Configures a request context and attaches it to the request.
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The following HTTP request headers are used:
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X-User-Id or X-User:
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Used for context.user_id.
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X-Tenant-Id or X-Tenant:
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Used for context.tenant.
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X-Auth-Token:
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Used for context.auth_token.
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X-Roles:
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Used for setting context.is_admin flag to either True or False.
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The flag is set to True, if X-Roles contains either an administrator
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or admin substring. Otherwise it is set to False.
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"""
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def __init__(self, public_api_routes):
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self.public_api_routes = public_api_routes
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super(ContextHook, self).__init__()
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def before(self, state):
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headers = state.request.headers
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# Do not pass any token with context for noauth mode
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auth_token = (None if cfg.CONF.auth_strategy == 'noauth' else
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headers.get('X-Auth-Token'))
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creds = {
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'user': headers.get('X-User') or headers.get('X-User-Id'),
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'tenant': headers.get('X-Tenant') or headers.get('X-Tenant-Id'),
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'domain_id': headers.get('X-User-Domain-Id'),
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'domain_name': headers.get('X-User-Domain-Name'),
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'auth_token': auth_token,
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'roles': headers.get('X-Roles', '').split(','),
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}
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# NOTE(adam_g): We also check the previous 'admin' rule to ensure
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# compat with default juno policy.json. This double check may be
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# removed in L.
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is_admin = (policy.enforce('admin_api', creds, creds) or
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policy.enforce('admin', creds, creds))
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is_public_api = state.request.environ.get('is_public_api', False)
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show_password = policy.enforce('show_password', creds, creds)
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state.request.context = context.RequestContext(
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is_admin=is_admin,
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is_public_api=is_public_api,
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show_password=show_password,
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**creds)
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class RPCHook(hooks.PecanHook):
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"""Attach the rpcapi object to the request so controllers can get to it."""
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def before(self, state):
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state.request.rpcapi = rpcapi.ConductorAPI()
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class TrustedCallHook(hooks.PecanHook):
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"""Verify that the user has admin rights.
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Checks whether the API call is performed against a public
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resource or the user has admin privileges in the appropriate
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tenant, domain or other administrative unit.
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"""
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def before(self, state):
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ctx = state.request.context
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if ctx.is_public_api:
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return
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policy.enforce('admin_api', ctx.to_dict(), ctx.to_dict(),
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do_raise=True, exc=exc.HTTPForbidden)
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class NoExceptionTracebackHook(hooks.PecanHook):
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"""Workaround rpc.common: deserialize_remote_exception.
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deserialize_remote_exception builds rpc exception traceback into error
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message which is then sent to the client. Such behavior is a security
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concern so this hook is aimed to cut-off traceback from the error message.
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"""
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# NOTE(max_lobur): 'after' hook used instead of 'on_error' because
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# 'on_error' never fired for wsme+pecan pair. wsme @wsexpose decorator
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# catches and handles all the errors, so 'on_error' dedicated for unhandled
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# exceptions never fired.
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def after(self, state):
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# Omit empty body. Some errors may not have body at this level yet.
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if not state.response.body:
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return
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# Do nothing if there is no error.
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if 200 <= state.response.status_int < 400:
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return
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json_body = state.response.json
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# Do not remove traceback when server in debug mode (except 'Server'
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# errors when 'debuginfo' will be used for traces).
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if cfg.CONF.debug and json_body.get('faultcode') != 'Server':
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return
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faultstring = json_body.get('faultstring')
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traceback_marker = 'Traceback (most recent call last):'
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if faultstring and traceback_marker in faultstring:
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# Cut-off traceback.
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faultstring = faultstring.split(traceback_marker, 1)[0]
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# Remove trailing newlines and spaces if any.
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json_body['faultstring'] = faultstring.rstrip()
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# Replace the whole json. Cannot change original one beacause it's
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# generated on the fly.
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state.response.json = json_body
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