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#!/usr/bin/env python
# Copyright (C) 2013 Google Inc.
#
# 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.
"""Command-line sample application for listing all objects in a bucket using
the Cloud Storage API.
This sample is used on this page:
https://cloud.google.com/storage/docs/json_api/v1/json-api-python-samples
For more information, see the README.md under /storage.
"""
import argparse
import json
from googleapiclient import discovery
from oauth2client.client import GoogleCredentials
def create_service():
"""Creates the service object for calling the Cloud Storage API."""
# Get the application default credentials. When running locally, these are
# available after running `gcloud init`. When running on compute
# engine, these are available from the environment.
credentials = GoogleCredentials.get_application_default()
# Construct the service object for interacting with the Cloud Storage API -
# the 'storage' service, at version 'v1'.
# You can browse other available api services and versions here:
# https://developers.google.com/api-client-library/python/apis/
return discovery.build('storage', 'v1', credentials=credentials)
def get_bucket_metadata(bucket):
"""Retrieves metadata about the given bucket."""
service = create_service()
# Make a request to buckets.get to retrieve a list of objects in the
# specified bucket.
req = service.buckets().get(bucket=bucket)
return req.execute()
def list_bucket(bucket):
"""Returns a list of metadata of the objects within the given bucket."""
service = create_service()
# Create a request to objects.list to retrieve a list of objects.
fields_to_return = \
'nextPageToken,items(name,size,contentType,metadata(my-key))'
req = service.objects().list(bucket=bucket, fields=fields_to_return)
all_objects = []
# If you have too many items to list in one request, list_next() will
# automatically handle paging with the pageToken.
while req:
resp = req.execute()
all_objects.extend(resp.get('items', []))
req = service.objects().list_next(req, resp)
return all_objects
def main(bucket):
print(json.dumps(get_bucket_metadata(bucket), indent=2))
print(json.dumps(list_bucket(bucket), indent=2))
if __name__ == '__main__':
parser = argparse.ArgumentParser(
description=__doc__,
formatter_class=argparse.RawDescriptionHelpFormatter)
parser.add_argument('bucket', help='Your Cloud Storage bucket.')
args = parser.parse_args()
main(args.bucket)