Java Requires Chilkat v10.1.2+

GeoOp OAuth2 Authorisation Code Grant (Public App)

See more OAuth2 Examples

Demonstrates how to get an access token for a GeoOp Third-Party Public Application using the Authorisation Code Grant flow. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.FileAccess;
import com.chilkatsoft.chilkat2.OAuth2;

public class ChilkatExample {

    public static void main(String[] args) {
        // It requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        OAuth2 oauth2 = new OAuth2();

        // This should match the Site URL configured for your GeoOp (non-Server) Application, such as "http://localhost:3017/"
        oauth2.setListenPort(3017);

        oauth2.setAuthorizationEndpoint("https://login.geoop.com/oauth2/code");
        oauth2.setTokenEndpoint("https://login.geoop.com/oauth2/token");

        // Replace the client ID with an actual value.
        oauth2.setClientId("GEOOP-APPLICATION-ID");
        // The ClientSecret should remain empty for a GeoOp public application
        oauth2.setClientSecret("");

        // We need a few special settings for GeoOp
        oauth2.setScope("default");
        oauth2.setCodeChallenge(false);
        // Setting LocalHost equal to "none" prevents the "redirect_uri" query param from being sent in the initial HTTP request.
        // Note: The GeoOp Application should still have a redirect URL specified as "http://localhost:3017/", where the port
        // number matches the ListenPort above.
        oauth2.setLocalHost("none");

        // Begin the OAuth2 Authorization code flow.  This returns a URL that should be loaded in a browser.
        String url;
        try {
            url = oauth2.startAuth();

            // Launch the default browser on the system and navigate to the url.
            // The LaunchBrowser method was added in Chilkat v10.1.2.
            oauth2.launchBrowser(url);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Wait for the user to approve or deny authorization in the browser.
        int numMsWaited = 0;
        while ((numMsWaited < 90000) && (oauth2.getAuthFlowState() < 3)) {
            oauth2.sleepMs(100);
            numMsWaited = numMsWaited + 100;
        }

        // If the browser does not respond within the specified time, AuthFlowState will be:
        //
        // 1: Waiting for Redirect – The OAuth2 background thread is waiting for the browser's redirect request.
        // 2: Waiting for Final Response – The thread is awaiting the final access token response.
        // In either case, cancel the background task initiated by StartAuth.

        if (oauth2.getAuthFlowState() < 3) {
            oauth2.cancel();
            System.out.println("No response from the browser!");
            return;
        }

        // Check AuthFlowState to determine if authorization was granted, denied, or failed:
        //
        // 3: Success – OAuth2 flow completed, the background thread exited, and the successful response is in AccessTokenResponse.
        // 4: Access Denied – OAuth2 flow completed, the background thread exited, and the error response is in AccessTokenResponse.
        // 5: Failure – OAuth2 flow failed before completion, the background thread exited, and error details are in FailureInfo.

        if (oauth2.getAuthFlowState() == 5) {
            System.out.println("OAuth2 failed to complete.");
            System.out.println(oauth2.getFailureInfo());
            return;
        }

        if (oauth2.getAuthFlowState() == 4) {
            System.out.println("OAuth2 authorization was denied.");
            System.out.println(oauth2.getAccessTokenResponse());
            return;
        }

        if (oauth2.getAuthFlowState() != 3) {
            System.out.println("Unexpected AuthFlowState:" + oauth2.getAuthFlowState());
            return;
        }

        System.out.println("OAuth2 authorization granted!");
        System.out.println("Access Token = " + oauth2.getAccessToken());

        // Save the entire JSON response, which includes the access token, for future calls.
        // The JSON AccessTokenResponse looks like this:
        // {"access_token":"e6dqdG....mzjpT04w==","token_type":"Bearer","expires_in":2592000,"owner_id":984236}

        FileAccess fac = new FileAccess();
        fac.writeEntireTextFile("qa_data/tokens/geoop.json", oauth2.getAccessTokenResponse(), "utf-8", false);

        System.out.println("Success.");
    }
}