Google OAuth2 command-line example

Question

Google has an example of an OAuth2 client here

I am completelly new to OAuth2 and I would like to get this example working before I move to integrate OAuth2 with my application. What I have done is the following:

1. Register a test application
2. Get Client ID and Client Secret
3. Configure those values into client_secrets.json
4. Run the test app: python moderator.py

The application opens up a browser, where I can (as a user) authorize the application to access my account. But Google is complaining like this (400 Bad Request):

Error: redirect_uri_mismatch
The redirect URI in the request: http://localhost:8080/ did not match a registered redirect URI
Learn more
Request Details
from_login=1
scope=https://www.googleapis.com/auth/moderator
response_type=code
access_type=offline
redirect_uri=http://localhost:8080/
approval_prompt=auto
as=-xxxxxxxxxxxxx
pli=1
client_id=xxxxxxxxxxx.apps.googleusercontent.com
authuser=0
hl=en

I guess the localhost:8080 is coming from an internal web server started by moderator.py. My question is: has somebody goten this example to work? What other components do I need (apache configuration, DNS, ...)

I am very confused with OAuth2 and any help would be greatly appreciated.

Answer 1

First of all, sorry if my answer isn't very precise, because I'm also very new to OAuth (and even python)... and also sorry if it came too late, I don't usually access here.

Have you tried using this (worked for me): REDIRECT_URI = 'urn:ietf:wg:oauth:2.0:oob'

Check this: https://developers.google.com/accounts/docs/OAuth2InstalledApp#choosingredirecturi

Here I have a piece of code with a complete OAuth flow working.