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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.
# [START all]
"""Command-line sample application for composing objects 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.
To run, create a least two sample files:
$ echo "File 1" > file1.txt
$ echo "File 2" > file2.txt
Example invocation:
$ python compose_objects.py my-bucket destination.txt file1.txt file2.txt
"""
import argparse
import json
from googleapiclient import discovery
from oauth2client.client import GoogleCredentials
def main(bucket, destination, sources):
# 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 the interacting with the Cloud Storage
# API.
service = discovery.build('storage', 'v1', credentials=credentials)
# Upload the source files.
for filename in sources:
req = service.objects().insert(
media_body=filename,
name=filename,
bucket=bucket)
resp = req.execute()
print('> Uploaded source file {}'.format(filename))
print(json.dumps(resp, indent=2))
# Construct a request to compose the source files into the destination.
compose_req_body = {
'sourceObjects': [{'name': filename} for filename in sources],
'destination': {
'contentType': 'text/plain', # required
}
}
req = service.objects().compose(
destinationBucket=bucket,
destinationObject=destination,
body=compose_req_body)
resp = req.execute()
print('> Composed files into {}'.format(destination))
print(json.dumps(resp, indent=2))
# Download and print the composed object.
req = service.objects().get_media(
bucket=bucket,
object=destination)
res = req.execute()
print('> Composed file contents:')
print(res)
if __name__ == '__main__':
parser = argparse.ArgumentParser(
description=__doc__,
formatter_class=argparse.RawDescriptionHelpFormatter)
parser.add_argument('bucket', help='Your Cloud Storage bucket.')
parser.add_argument('destination', help='Destination file name.')
parser.add_argument('sources', nargs='+', help='Source files to compose.')
args = parser.parse_args()
main(args.bucket, args.destination, args.sources)
# [END all]