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#!/usr/bin/env python
# Copyright 2016 Google Inc. 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.
"""This application demonstrates how to perform basic operations on IAM
policies with the Cloud Pub/Sub API.
For more information, see the README.md under /pubsub and the documentation
at https://cloud.google.com/pubsub/docs.
"""
import argparse
from google.cloud import pubsub_v1
def get_topic_policy(project, topic_name):
"""Prints the IAM policy for the given topic."""
# [START pubsub_get_topic_policy]
client = pubsub_v1.PublisherClient()
topic_path = client.topic_path(project, topic_name)
policy = client.get_iam_policy(topic_path)
print('Policy for topic {}:'.format(topic_path))
for binding in policy.bindings:
print('Role: {}, Members: {}'.format(binding.role, binding.members))
# [END pubsub_get_topic_policy]
def get_subscription_policy(project, subscription_name):
"""Prints the IAM policy for the given subscription."""
# [START pubsub_get_subscription_policy]
client = pubsub_v1.SubscriberClient()
subscription_path = client.subscription_path(project, subscription_name)
policy = client.get_iam_policy(subscription_path)
print('Policy for subscription {}:'.format(subscription_path))
for binding in policy.bindings:
print('Role: {}, Members: {}'.format(binding.role, binding.members))
# [END pubsub_get_subscription_policy]
def set_topic_policy(project, topic_name):
"""Sets the IAM policy for a topic."""
# [START pubsub_set_topic_policy]
client = pubsub_v1.PublisherClient()
topic_path = client.topic_path(project, topic_name)
policy = client.get_iam_policy(topic_path)
# Add all users as viewers.
policy.bindings.add(
role='roles/pubsub.viewer',
members=['allUsers'])
# Add a group as a publisher.
policy.bindings.add(
role='roles/pubsub.publisher',
members=['group:cloud-logs@google.com'])
# Set the policy
policy = client.set_iam_policy(topic_path, policy)
print('IAM policy for topic {} set: {}'.format(
topic_name, policy))
# [END pubsub_set_topic_policy]
def set_subscription_policy(project, subscription_name):
"""Sets the IAM policy for a topic."""
# [START pubsub_set_subscription_policy]
client = pubsub_v1.SubscriberClient()
subscription_path = client.subscription_path(project, subscription_name)
policy = client.get_iam_policy(subscription_path)
# Add all users as viewers.
policy.bindings.add(
role='roles/pubsub.viewer',
members=['allUsers'])
# Add a group as an editor.
policy.bindings.add(
role='roles/editor',
members=['group:cloud-logs@google.com'])
# Set the policy
policy = client.set_iam_policy(subscription_path, policy)
print('IAM policy for subscription {} set: {}'.format(
subscription_name, policy))
# [END pubsub_set_subscription_policy]
def check_topic_permissions(project, topic_name):
"""Checks to which permissions are available on the given topic."""
# [START pubsub_test_topic_permissions]
client = pubsub_v1.PublisherClient()
topic_path = client.topic_path(project, topic_name)
permissions_to_check = [
'pubsub.topics.publish',
'pubsub.topics.update'
]
allowed_permissions = client.test_iam_permissions(
topic_path, permissions_to_check)
print('Allowed permissions for topic {}: {}'.format(
topic_path, allowed_permissions))
# [END pubsub_test_topic_permissions]
def check_subscription_permissions(project, subscription_name):
"""Checks to which permissions are available on the given subscription."""
# [START pubsub_test_subscription_permissions]
client = pubsub_v1.SubscriberClient()
subscription_path = client.subscription_path(project, subscription_name)
permissions_to_check = [
'pubsub.subscriptions.consume',
'pubsub.subscriptions.update'
]
allowed_permissions = client.test_iam_permissions(
subscription_path, permissions_to_check)
print('Allowed permissions for subscription {}: {}'.format(
subscription_path, allowed_permissions))
# [END pubsub_test_subscription_permissions]
if __name__ == '__main__':
parser = argparse.ArgumentParser(
description=__doc__,
formatter_class=argparse.RawDescriptionHelpFormatter
)
parser.add_argument('project', help='Your Google Cloud project ID')
subparsers = parser.add_subparsers(dest='command')
get_topic_policy_parser = subparsers.add_parser(
'get-topic-policy', help=get_topic_policy.__doc__)
get_topic_policy_parser.add_argument('topic_name')
get_subscription_policy_parser = subparsers.add_parser(
'get-subscription-policy', help=get_subscription_policy.__doc__)
get_subscription_policy_parser.add_argument('subscription_name')
set_topic_policy_parser = subparsers.add_parser(
'set-topic-policy', help=set_topic_policy.__doc__)
set_topic_policy_parser.add_argument('topic_name')
set_subscription_policy_parser = subparsers.add_parser(
'set-subscription-policy', help=set_subscription_policy.__doc__)
set_subscription_policy_parser.add_argument('subscription_name')
check_topic_permissions_parser = subparsers.add_parser(
'check-topic-permissions', help=check_topic_permissions.__doc__)
check_topic_permissions_parser.add_argument('topic_name')
check_subscription_permissions_parser = subparsers.add_parser(
'check-subscription-permissions',
help=check_subscription_permissions.__doc__)
check_subscription_permissions_parser.add_argument('subscription_name')
args = parser.parse_args()
if args.command == 'get-topic-policy':
get_topic_policy(args.project, args.topic_name)
elif args.command == 'get-subscription-policy':
get_subscription_policy(args.project, args.subscription_name)
elif args.command == 'set-topic-policy':
set_topic_policy(args.project, args.topic_name)
elif args.command == 'set-subscription-policy':
set_subscription_policy(args.project, args.subscription_name)
elif args.command == 'check-topic-permissions':
check_topic_permissions(args.project, args.topic_name)
elif args.command == 'check-subscription-permissions':
check_subscription_permissions(args.project, args.subscription_name)