To generate refresh token to use with Google API's for user data

refresh_token.py

#!/usr/bin/python
#
# Copyright 2014 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.

"""Generates refresh token for an 'Installed Application flow'.
Heavily appropriated from:
https://github.com/googleads/googleads-python-lib/blob/master/examples/adwords/authentication/generate_refresh_token.py
"""


import argparse
import sys

from oauth2client import client

DEFAULT_CLIENT_ID = '615266322580-qfq65ulrkolucrv9qm9el1h2u0hmfmp1.apps.googleusercontent.com'
DEFAULT_CLIENT_SECRET = 'PsUwwSQ4gOJC4OCr55o0ufoO'

# Fit API OAuth2 scope.
SCOPE = 'https://www.googleapis.com/auth/fitness.activity.read'

parser = argparse.ArgumentParser(description='Generates a refresh token with '
                                 'the provided credentials.')
parser.add_argument('--client_id', default=DEFAULT_CLIENT_ID,
                    help='Client Id retrieved from the Developer\'s Console.')
parser.add_argument('--client_secret', default=DEFAULT_CLIENT_SECRET,
                    help='Client Secret retrieved from the Developer\'s '
                    'Console.')
parser.add_argument('--additional_scopes', default=None,
                    help='Additional scopes to apply when generating the '
                    'refresh token. Each scope should be separated by a comma.')


def main(client_id, client_secret, scopes):
    """Retrieve and display the access and refresh token."""
    flow = client.OAuth2WebServerFlow(
        client_id=client_id,
        client_secret=client_secret,
        scope=scopes,
        redirect_uri='http://localhost:8080/oauth2callback')

    authorize_url = flow.step1_get_authorize_url()

    print ('Log into the Google Account you use to access your AdWords account'
           'and go to the following URL: \n%s\n' % (authorize_url))
    print 'After approving the token enter the verification code (if specified)'
    code = raw_input('Code: ').strip()

    try:
        credential = flow.step2_exchange(code)
    except client.FlowExchangeError, e:
        print 'Authentication has failed: %s' % e
        sys.exit(1)
    else:
        print ('OAuth2 authorization successful!\n\n'
               'Your access token is:\n %s\n\nYour refresh token is:\n %s'
               % (credential.access_token, credential.refresh_token))


if __name__ == '__main__':
    args = parser.parse_args()
    configured_scopes = [SCOPE]
    if not (any([args.client_id, DEFAULT_CLIENT_ID]) and
            any([args.client_secret, DEFAULT_CLIENT_SECRET])):
        raise AttributeError('No client_id or client_secret specified.')
    if args.additional_scopes:
        configured_scopes.extend(
            args.additional_scopes.replace(' ', '').split(','))
    main(args.client_id, args.client_secret, configured_scopes)