How to the Google OpenID Connect Authentication Request is process by Google OpenID Connect service?

When Google OpenID Connect service receives a Authentication Request from an end user's Web browser, it will:

• Verify if the "client_id" value in the request is valid. If not, display an error message page to the end user.
• Search a valid login session from Web browser's cookies that matches the registered application associated with your "client_id".
• Generate the authentication response with the login session information, if a valid login session is found.
• Display a login Web page to the end user, if no valid login session found.
• Generate the authentication response with the login session information, when the end user finishes the login process to a Google account.
• Verify if the "redirect_uri" value in the request is valid, after the authentication response is generated. If not, display an error message page to the end user.
• Redirect the Web browser to "redirect_uri" with the authentication response.

If you provides incorrect parameters in the authentication request, Google OpenID Connect service will return "error" and "error_description" in the authentication response.

⇒ Authentication Response Received from Google OpenID Connect

⇐ Initiate Google OpenID Connect Authentication Request

⇑ Google OpenID Connect Integration

⇑⇑ OpenID Tutorials