Google OAuth 2 and state parameter values need to be registered in redirect url

Question

The state parameter according to the Google Oauth 2.0 docs:

Indicates any state which may be useful to your application upon receipt of the response. The

Answer 1

The name of the parameter is state (and not redirect_state)!

A sample OAuth request according to the google documentations is ->

https://accounts.google.com/o/oauth2/auth?
scope=https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fuserinfo.email+https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fuserinfo.profile&
state=%2Fprofile&
redirect_uri=https%3A%2F%2Foauth2-login-demo.appspot.com%2Fcode&
response_type=code&
client_id=812741506391.apps.googleusercontent.com&approval_prompt=force

Please note the State parameter and the redirect_uri parameter. I think you've mixed up the two.

EDIT - See this link by Google. Has good explanation about state parameters and building up the web requests.