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 django_cloudsql

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crud_object.py

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#!/usr/bin/env python

# Copyright (C) 2016 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.

"""Application for uploading an object 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 filecmp

import json

import tempfile

from googleapiclient import discovery

from googleapiclient import http

from oauth2client.client import GoogleCredentials

def main(bucket, filename, readers=[], owners=[]):

print('Uploading object..')

resp = upload_object(bucket, filename, readers, owners)

print(json.dumps(resp, indent=2))

print('Fetching object..')

with tempfile.NamedTemporaryFile(mode='w+b') as tmpfile:

get_object(bucket, filename, out_file=tmpfile)

tmpfile.seek(0)

if not filecmp.cmp(filename, tmpfile.name):

raise Exception('Downloaded file != uploaded object')

print('Deleting object..')

resp = delete_object(bucket, filename)

if resp:

print(json.dumps(resp, indent=2))

print('Done')

def create_service():

# 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:

# http://g.co/dev/api-client-library/python/apis/

return discovery.build('storage', 'v1', credentials=credentials)

def upload_object(bucket, filename, readers, owners):

service = create_service()

# This is the request body as specified:

# http://g.co/cloud/storage/docs/json_api/v1/objects/insert#request

body = {

'name': filename,

}

# If specified, create the access control objects and add them to the

# request body

if readers or owners:

body['acl'] = []

for r in readers:

body['acl'].append({

'entity': 'user-%s' % r,

'role': 'READER',

'email': r

})

for o in owners:

body['acl'].append({

'entity': 'user-%s' % o,

'role': 'OWNER',

'email': o

})

# Now insert them into the specified bucket as a media insertion.

# http://g.co/dev/resources/api-libraries/documentation/storage/v1/python/latest/storage_v1.objects.html#insert

with open(filename, 'rb') as f:

req = service.objects().insert(

bucket=bucket, body=body,

# You can also just set media_body=filename, but # for the sake of

# demonstration, pass in the more generic file handle, which could

# very well be a StringIO or similar.

media_body=http.MediaIoBaseUpload(f, 'application/octet-stream'))

resp = req.execute()

return resp

def get_object(bucket, filename, out_file):

service = create_service()

# Use get_media instead of get to get the actual contents of the object.

# http://g.co/dev/resources/api-libraries/documentation/storage/v1/python/latest/storage_v1.objects.html#get_media

req = service.objects().get_media(bucket=bucket, object=filename)

downloader = http.MediaIoBaseDownload(out_file, req)

done = False

while done is False:

status, done = downloader.next_chunk()

print("Download {}%.".format(int(status.progress() * 100)))

return out_file

def delete_object(bucket, filename):

service = create_service()

req = service.objects().delete(bucket=bucket, object=filename)

resp = req.execute()

return resp

if __name__ == '__main__':

parser = argparse.ArgumentParser(

description=__doc__,

formatter_class=argparse.RawDescriptionHelpFormatter)

parser.add_argument('filename', help='The name of the file to upload')

parser.add_argument('bucket', help='Your Cloud Storage bucket.')

parser.add_argument('--reader', action='append', default=[],

help='Your Cloud Storage bucket.')

parser.add_argument('--owner', action='append', default=[],

help='Your Cloud Storage bucket.')

args = parser.parse_args()

main(args.bucket, args.filename, args.reader, args.owner)