Java

Get a Google Drive Access Token using a JSON Private Key

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Demonstrates how to get a Google Drive API access token using a JSON service account private key. Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

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

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

    //  First load the JSON key into a string.
    CkFileAccess fac = new CkFileAccess();
    String jsonKey = fac.readEntireTextFile("qa_data/googleApi/chilkatcloud-b8826e030499.json","utf-8");
    if (fac.get_LastMethodSuccess() != true) {
        System.out.println(fac.lastErrorText());
        return;
        }

    CkAuthGoogle gAuth = new CkAuthGoogle();
    gAuth.put_JsonKey(jsonKey);

    //  Choose a scope.
    gAuth.put_Scope("https://www.googleapis.com/auth/drive");

    //  Request an access token that is valid for this many seconds.
    gAuth.put_ExpireNumSeconds(3600);

    //  If the application is requesting delegated access:
    //  The email address of the user for which the application is requesting delegated access,
    //  then set the email address here. (Otherwise leave it empty.)
    gAuth.put_SubEmailAddress("");

    //  Connect to www.googleapis.com using TLS (TLS 1.2 is the default.)
    //  The Chilkat socket object is used so that the connection can be established
    //  through proxies or an SSH tunnel if desired.
    CkSocket tlsSock = new CkSocket();
    success = tlsSock.Connect("www.googleapis.com",443,true,5000);
    if (success != true) {
        System.out.println(tlsSock.lastErrorText());
        return;
        }

    //  Send the request to obtain the access token.
    success = gAuth.ObtainAccessToken(tlsSock);
    if (success != true) {
        System.out.println(gAuth.lastErrorText());
        return;
        }

    //  Examine the access token:
    System.out.println("Access Token: " + gAuth.accessToken());
  }
}