Google consent screen not shown as expected

Question

I have registered a web application at cloud.google.com. \"The OAuth 2.0 Client ID\" looks like this:

Answer 1

https://github.com/manishkbharti/grailsOauthPluginDemo already update the way to use Oauth2 for google. If you can't use Oauth2 from this Demo, you can look at grails plugin: Google for Spring Security OAuth plugin (https://github.com/donbeave/grails-spring-security-oauth-google). In their source code, they try to implement Oauth2 from DefaultApi20 class

I don't know why but I can only get the authorization code after the process, so I need to do an extra step to convert this code to an access token, here is the code in details:

def oauth2callback = { def code = params.code

    HttpTransport transport = new NetHttpTransport();
    JacksonFactory jsonFactory = new JacksonFactory();
    String CLIENT_ID = "....";
    String CLIENT_SECRET = "....";
    String REDIRECT_URI = ".....";

    GoogleTokenResponse response =
        new GoogleAuthorizationCodeTokenRequest(transport, jsonFactory, CLIENT_ID, CLIENT_SECRET, code, REDIRECT_URI).execute();

    GoogleCredential credential = new GoogleCredential.Builder().setClientSecrets(CLIENT_ID, CLIENT_SECRET)
            .setJsonFactory(jsonFactory).setTransport(transport).build()
            .setAccessToken(response.getAccessToken()).setRefreshToken(response.getRefreshToken());

    SpreadsheetService service = new SpreadsheetService("MySpreadsheetIntegration-v1");
    service.setOAuth2Credentials(credential);
    // Define the URL to request.  This should never change.
    URL SPREADSHEET_FEED_URL = new URL(
            "https://spreadsheets.google.com/feeds/spreadsheets/private/full");

    // Make a request to the API and get all spreadsheets.
    SpreadsheetFeed feed = service.getFeed(SPREADSHEET_FEED_URL, SpreadsheetFeed.class);
    List spreadsheets = feed.getEntries();

    spreadsheets.each {
        println it.getTitle().getPlainText()
    }
}