Authentication Status

# 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. """Command-line tools for authenticating via OAuth 2.0 Do the OAuth 2.0 Web Server dance for a command line application. Stores the generated credentials in a common file that is used by other example apps in the same directory. """ from __future__ import print_function __author__ = 'jcgregorio@google.com (Joe Gregorio)' __all__ = ['argparser', 'run_flow', 'run', 'message_if_missing'] import logging import socket import sys from third_party.six.moves import BaseHTTPServer from third_party.six.moves import urllib from third_party.six.moves import input from . import client from . import util _CLIENT_SECRETS_MESSAGE = """WARNING: Please configure OAuth 2.0 To make this sample run you will need to populate the client_secrets.json file found at: %s with information from the APIs Console . """ def _CreateArgumentParser(): try: import argparse except ImportError: return None parser = argparse.ArgumentParser(add_help=False) parser.add_argument('--auth_host_name', default='localhost', help='Hostname when running a local web server.') parser.add_argument('--noauth_local_webserver', action='store_true', default=False, help='Do not run a local web server.') parser.add_argument('--auth_host_port', default=[8080, 8090], type=int, nargs='*', help='Port web server should listen on.') parser.add_argument('--logging_level', default='ERROR', choices=['DEBUG', 'INFO', 'WARNING', 'ERROR', 'CRITICAL'], help='Set the logging level of detail.') return parser # argparser is an ArgumentParser that contains command-line options expected # by tools.run(). Pass it in as part of the 'parents' argument to your own # ArgumentParser. argparser = _CreateArgumentParser() class ClientRedirectServer(BaseHTTPServer.HTTPServer): """A server to handle OAuth 2.0 redirects back to localhost. Waits for a single request and parses the query parameters into query_params and then stops serving. """ query_params = {} class ClientRedirectHandler(BaseHTTPServer.BaseHTTPRequestHandler): """A handler for OAuth 2.0 redirects back to localhost. Waits for a single request and parses the query parameters into the servers query_params and then stops serving. """ def do_GET(self): """Handle a GET request. Parses the query parameters and prints a message if the flow has completed. Note that we can't detect if an error occurred. """ self.send_response(200) self.send_header("Content-type", "text/html") self.end_headers() query = self.path.split('?', 1)[-1] query = dict(urllib.parse.parse_qsl(query)) self.server.query_params = query self.wfile.write(b"Authentication Status") self.wfile.write(b"

The authentication flow has completed.

") self.wfile.write(b"") def log_message(self, format, *args): """Do not log messages to stdout while running as command line program.""" @util.positional(3) def run_flow(flow, storage, flags, http=None): """Core code for a command-line application. The ``run()`` function is called from your application and runs through all the steps to obtain credentials. It takes a ``Flow`` argument and attempts to open an authorization server page in the user's default web browser. The server asks the user to grant your application access to the user's data. If the user grants access, the ``run()`` function returns new credentials. The new credentials are also stored in the ``storage`` argument, which updates the file associated with the ``Storage`` object. It presumes it is run from a command-line application and supports the following flags: ``--auth_host_name`` (string, default: ``localhost``) Host name to use when running a local web server to handle redirects during OAuth authorization. ``--auth_host_port`` (integer, default: ``[8080, 8090]``) Port to use when running a local web server to handle redirects during OAuth authorization. Repeat this option to specify a list of values. ``--[no]auth_local_webserver`` (boolean, default: ``True``) Run a local web server to handle redirects during OAuth authorization. The tools module defines an ``ArgumentParser`` the already contains the flag definitions that ``run()`` requires. You can pass that ``ArgumentParser`` to your ``ArgumentParser`` constructor:: parser = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter, parents=[tools.argparser]) flags = parser.parse_args(argv) Args: flow: Flow, an OAuth 2.0 Flow to step through. storage: Storage, a ``Storage`` to store the credential in. flags: ``argparse.Namespace``, The command-line flags. This is the object returned from calling ``parse_args()`` on ``argparse.ArgumentParser`` as described above. http: An instance of ``httplib2.Http.request`` or something that acts like it. Returns: Credentials, the obtained credential. """ logging.getLogger().setLevel(getattr(logging, flags.logging_level)) if not flags.noauth_local_webserver: success = False port_number = 0 for port in flags.auth_host_port: port_number = port try: httpd = ClientRedirectServer((flags.auth_host_name, port), ClientRedirectHandler) except socket.error: pass else: success = True break flags.noauth_local_webserver = not success if not success: print('Failed to start a local webserver listening on either port 8080') print('or port 9090. Please check your firewall settings and locally') print('running programs that may be blocking or using those ports.') print() print('Falling back to --noauth_local_webserver and continuing with') print('authorization.') print() if not flags.noauth_local_webserver: oauth_callback = 'http://%s:%s/' % (flags.auth_host_name, port_number) else: oauth_callback = client.OOB_CALLBACK_URN flow.redirect_uri = oauth_callback authorize_url = flow.step1_get_authorize_url() if not flags.noauth_local_webserver: import webbrowser webbrowser.open(authorize_url, new=1, autoraise=True) print('Your browser has been opened to visit:') print() print(' ' + authorize_url) print() print('If your browser is on a different machine then exit and re-run this') print('application with the command-line parameter ') print() print(' --noauth_local_webserver') print() else: print('Go to the following link in your browser:') print() print(' ' + authorize_url) print() code = None if not flags.noauth_local_webserver: httpd.handle_request() if 'error' in httpd.query_params: sys.exit('Authentication request was rejected.') if 'code' in httpd.query_params: code = httpd.query_params['code'] else: print('Failed to find "code" in the query parameters of the redirect.') sys.exit('Try running with --noauth_local_webserver.') else: code = input('Enter verification code: ').strip() try: credential = flow.step2_exchange(code, http=http) except client.FlowExchangeError as e: sys.exit('Authentication has failed: %s' % e) storage.put(credential) credential.set_store(storage) print('Authentication successful.') return credential def message_if_missing(filename): """Helpful message to display if the CLIENT_SECRETS file is missing.""" return _CLIENT_SECRETS_MESSAGE % filename try: from oauth2client.old_run import run from oauth2client.old_run import FLAGS except ImportError: def run(*args, **kwargs): raise NotImplementedError( 'The gflags library must be installed to use tools.run(). ' 'Please install gflags or preferrably switch to using ' 'tools.run_flow().')