I am trying to get the "Using OAuth 2.0 for Web Server Applications" example program to work on my Google Cloud Shell. The url is at https://developers.google.com/identity/protocols/oauth2/web-server#example
It fails on line 113 flow.fetch_token(authorization_response=authorization_response)
The error is oauthlib.oauth2.rfc6749.errors.CustomOAuth2Error: (redirect_uri_mismatch) Bad Request
# https://developers.google.com/identity/protocols/oauth2/web-server#example
# -*- coding: utf-8 -*-
import os
import flask
import requests
import google.oauth2.credentials
import google_auth_oauthlib.flow
import googleapiclient.discovery
import logging
logging.basicConfig(level=logging.DEBUG, format='%(asctime)s %(levelname)s: %(message)s')
logger = logging.getLogger(__name__)
logger.debug("Line 16 debuger is working")
# This variable specifies the name of a file that contains the OAuth 2.0
# information for this application, including its client_id and client_secret.
#! CLIENT_SECRETS_FILE = "client_secret.json"
CLIENT_SECRETS_FILE = "./credentials.json" #this is correct
# This OAuth 2.0 access scope allows for full read/write access to the
# authenticated user's account and requires requests to use an SSL connection.
# the scopes must equate to the same scopes in the JSON file downloaded from GCP to prevent a warning.
#SCOPES = ['https://www.googleapis.com/auth/drive.metadata.readonly']
SCOPES = [
'https://www.googleapis.com/auth/userinfo.profile',
'https://www.googleapis.com/auth/calendar.readonly',
'https://www.googleapis.com/auth/tasks.readonly',
#this ones fails the program when refresh the pickle file if openid is not added
'https://www.googleapis.com/auth/userinfo.email','openid',
'https://www.googleapis.com/auth/drive.metadata.readonly'
]
API_SERVICE_NAME = 'drive'
API_VERSION = 'v2'
app = flask.Flask(__name__)
# Note: A secret key is included in the sample so that it works.
# If you use this code in your application, replace this with a truly secret
# key. See https://flask.palletsprojects.com/quickstart/#sessions.
#! app.secret_key = 'REPLACE ME - this value is here as a placeholder.'
app.secret_key = os.environ.get("SECRET_KEY") or os.urandom(24)
@app.route('/')
def index():
return print_index_table()
@app.route('/test')
def test_api_request():
if 'credentials' not in flask.session:
return flask.redirect('authorize')
# Load credentials from the session.
credentials = google.oauth2.credentials.Credentials(
**flask.session['credentials'])
drive = googleapiclient.discovery.build(
API_SERVICE_NAME, API_VERSION, credentials=credentials)
files = drive.files().list().execute()
# Save credentials back to session in case access token was refreshed.
# ACTION ITEM: In a production app, you likely want to save these
# credentials in a persistent database instead.
flask.session['credentials'] = credentials_to_dict(credentials)
return flask.jsonify(**files)
@app.route('/authorize')
def authorize():
# Create flow instance to manage the OAuth 2.0 Authorization Grant Flow steps.
flow = google_auth_oauthlib.flow.Flow.from_client_secrets_file(
CLIENT_SECRETS_FILE, scopes=SCOPES)
# The URI created here must exactly match one of the authorized redirect URIs
# for the OAuth 2.0 client, which you configured in the API Console. If this
# value doesn't match an authorized URI, you will get a 'redirect_uri_mismatch'
# error.
flow.redirect_uri = flask.url_for('oauth2callback', _external=True)
authorization_url, state = flow.authorization_url(
# Enable offline access so that you can refresh an access token without
# re-prompting the user for permission. Recommended for web server apps.
access_type='offline',
# Enable incremental authorization. Recommended as a best practice.
include_granted_scopes='true')
# Store the state so the callback can verify the auth server response.
flask.session['state'] = state
return flask.redirect(authorization_url)
@app.route('/oauth2callback')
def oauth2callback():
# Specify the state when creating the flow in the callback so that it can
# verified in the authorization server response.
state = flask.session['state']
flow = google_auth_oauthlib.flow.Flow.from_client_secrets_file(
CLIENT_SECRETS_FILE, scopes=SCOPES, state=state)
flow.redirect_uri = flask.url_for('oauth2callback', _external=True)
# Use the authorization server's response to fetch the OAuth 2.0 tokens.
authorization_response = flask.request.url
logger.debug("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX authorization_response="+authorization_response)
logger.debug("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX117")
flow.fetch_token(authorization_response=authorization_response)
logger.debug("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX119") #did NOT get here
# Store credentials in the session.
# ACTION ITEM: In a production app, you likely want to save these
# credentials in a persistent database instead.
credentials = flow.credentials
flask.session['credentials'] = credentials_to_dict(credentials)
return flask.redirect(flask.url_for('test_api_request'))
@app.route('/revoke')
def revoke():
if 'credentials' not in flask.session:
return ('You need to <a href="/authorize">authorize</a> before ' +
'testing the code to revoke credentials.')
credentials = google.oauth2.credentials.Credentials(
**flask.session['credentials'])
revoke = requests.post('https://oauth2.googleapis.com/revoke',
params={'token': credentials.token},
headers = {'content-type': 'application/x-www-form-urlencoded'})
status_code = getattr(revoke, 'status_code')
if status_code == 200:
return('Credentials successfully revoked.' + print_index_table())
else:
return('An error occurred.' + print_index_table())
@app.route('/clear')
def clear_credentials():
if 'credentials' in flask.session:
del flask.session['credentials']
return ('Credentials have been cleared.<br><br>' +
print_index_table())
def credentials_to_dict(credentials):
return {'token': credentials.token,
'refresh_token': credentials.refresh_token,
'token_uri': credentials.token_uri,
'client_id': credentials.client_id,
'client_secret': credentials.client_secret,
'scopes': credentials.scopes}
def print_index_table():
return ('<table>' +
'<tr><td><a href="/test">Test an API request</a></td>' +
'<td>Submit an API request and see a formatted JSON response. ' +
' Go through the authorization flow if there are no stored ' +
' credentials for the user.</td></tr>' +
'<tr><td><a href="/authorize">Test the auth flow directly</a></td>' +
'<td>Go directly to the authorization flow. If there are stored ' +
' credentials, you still might not be prompted to reauthorize ' +
' the application.</td></tr>' +
'<tr><td><a href="/revoke">Revoke current credentials</a></td>' +
'<td>Revoke the access token associated with the current user ' +
' session. After revoking credentials, if you go to the test ' +
' page, you should see an <code>invalid_grant</code> error.' +
'</td></tr>' +
'<tr><td><a href="/clear">Clear Flask session credentials</a></td>' +
'<td>Clear the access token currently stored in the user session. ' +
' After clearing the token, if you <a href="/test">test the ' +
' API request</a> again, you should go back to the auth flow.' +
'</td></tr></table>')
if __name__ == '__main__':
# When running locally, disable OAuthlib's HTTPs verification.
# ACTION ITEM for developers:
# When running in production *do not* leave this option enabled.
os.environ['OAUTHLIB_INSECURE_TRANSPORT'] = '1'
# Specify a hostname and port that are set as a valid redirect URI
# for your API project in the Google API Console.
app.run('0.0.0.0', 5000, debug=True)
LinkedIn
Twitter
