Java

Google Drive Refresh Access Token

See more Google Drive Examples

Demonstrates how to automatically refresh the access token when it expires. Chilkat2 Java

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

public class ChilkatExample {

    public static void main(String[] args) {
        boolean success = false;

        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        success = true;

        // This example uses a previously obtained access token having permission for the
        // Google Drive scope.

        // The access token (and refresh token) was previously saved to a JSON file with this format:
        // See Get Google Drive OAuth2 Access Token

        // {
        //   "access_token": "ya29.Gls-BsdxTWuenChv ... yzVIrXikkLxu5T6dy4I6GjADFardoz4Lruw",
        //   "expires_in": 3600,
        //   "refresh_token": "1/tMBJ ... 27D-Hk6rpQYBA",
        //   "scope": "https://www.googleapis.com/auth/drive",
        //   "token_type": "Bearer"
        // }

        JsonObject json = new JsonObject();
        String tokenFilePath = "qa_data/tokens/googleDrive.json";
        json.loadFile(tokenFilePath);

        OAuth2 oauth2 = new OAuth2();
        oauth2.setAccessToken(json.stringOf("access_token"));
        oauth2.setRefreshToken(json.stringOf("refresh_token"));

        oauth2.setAuthorizationEndpoint("https://accounts.google.com/o/oauth2/v2/auth");
        oauth2.setTokenEndpoint("https://www.googleapis.com/oauth2/v4/token");

        //  Replace these with actual values.
        oauth2.setClientId("GOOGLE-CLIENT-ID");
        oauth2.setClientSecret("GOOGLE-CLIENT-SECRET");
        oauth2.setScope("https://www.googleapis.com/auth/drive");

        // Use OAuth2 to refresh the access token.
        try {
            oauth2.refreshAccessToken();
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println(oauth2.getAccessTokenResponse());

        // Save the new access token to our JSON file (so we can refresh it again when needed).
        json.updateString("access_token", oauth2.getAccessToken());

        FileAccess fac = new FileAccess();
        fac.writeEntireTextFile(tokenFilePath, json.emit(), "utf-8", false);

        System.out.println("Access Token Refreshed!");
    }
}