How to use do_raise method in Slash

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policy.py

Source:policy.py

1# Copyright (c) 2011 OpenStack, LLC.2# All Rights Reserved.3#4#    Licensed under the Apache License, Version 2.0 (the "License"); you may5#    not use this file except in compliance with the License. You may obtain6#    a copy of the License at7#8#         http://www.apache.org/licenses/LICENSE-2.09#10#    Unless required by applicable law or agreed to in writing, software11#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT12#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the13#    License for the specific language governing permissions and limitations14#    under the License.15"""Policy Engine For Manila"""16import functools17from oslo_config import cfg18from oslo_policy import policy19from manila import exception20CONF = cfg.CONF21_ENFORCER = None22def reset():23    global _ENFORCER24    if _ENFORCER:25        _ENFORCER.clear()26        _ENFORCER = None27def init(policy_path=None):28    global _ENFORCER29    if not _ENFORCER:30        _ENFORCER = policy.Enforcer(CONF)31        if policy_path:32            _ENFORCER.policy_path = policy_path33    _ENFORCER.load_rules()34def enforce(context, action, target, do_raise=True):35    """Verifies that the action is valid on the target in this context.36       :param context: manila context37       :param action: string representing the action to be checked,38           this should be colon separated for clarity.39           i.e. ``compute:create_instance``,40           ``compute:attach_volume``,41           ``volume:attach_volume``42       :param target: dictionary representing the object of the action43           for object creation, this should be a dictionary representing the44           location of the object e.g. ``{'project_id': context.project_id}``45       :param do_raise: Whether to raise an exception if check fails.46       :returns: When ``do_raise`` is ``False``, returns a value that47                 evaluates as ``True`` or ``False`` depending on whether48                 the policy allows action on the target.49       :raises: manila.exception.PolicyNotAuthorized if verification fails50                and ``do_raise`` is ``True``.51    """52    init()53    if not isinstance(context, dict):54        context = context.to_dict()55    # Add the exception arguments if asked to do a raise56    extra = {}57    if do_raise:58        extra.update(exc=exception.PolicyNotAuthorized, action=action,59                     do_raise=do_raise)60    return _ENFORCER.enforce(action, target, context, **extra)61def check_is_admin(roles):62    """Whether or not roles contain 'admin' role according to policy setting.63    """64    init()65    # include project_id on target to avoid KeyError if context_is_admin66    # policy definition is missing, and default admin_or_owner rule67    # attempts to apply.  Since our credentials dict does not include a68    # project_id, this target can never match as a generic rule.69    target = {'project_id': ''}70    credentials = {'roles': roles}71    return _ENFORCER.enforce("context_is_admin", target, credentials)72def wrap_check_policy(resource):73    """Check policy corresponding to the wrapped methods prior to execution."""74    def check_policy_wraper(func):75        @functools.wraps(func)76        def wrapped(self, context, target_obj, *args, **kwargs):77            check_policy(context, resource, func.__name__, target_obj)78            return func(self, context, target_obj, *args, **kwargs)79        return wrapped80    return check_policy_wraper81def check_policy(context, resource, action, target_obj=None):82    target = {83        'project_id': context.project_id,84        'user_id': context.user_id,85    }86    target.update(target_obj or {})87    _action = '%s:%s' % (resource, action)...

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