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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

import googleapiclient.discovery

def main(bucket, destination, sources):

# Construct the service object for the interacting with the Cloud Storage

# API.

service = googleapiclient.discovery.build('storage', 'v1')

# 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]