(Android™) Docusign Refresh OAuth2 Access Token

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Demonstrates how to refresh a Docusign OAuth2 access token. The refresh does not require user interaction via a web browser. If an access token expires (typically with a 401 response code), a new access token can be automatically obtained by using the code in this example.

For more information, see https://developers.docusign.com/esign-rest-api/guides/authentication/oauth2-code-grant

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;

import android.app.Activity;
import com.chilkatsoft.*;

import android.widget.TextView;
import android.os.Bundle;

public class SimpleActivity extends Activity {

  private static final String TAG = "Chilkat";

  // Called when the activity is first created.
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

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

    // It is assumed we previously obtained an OAuth2 access token.
    // This example loads the JSON access token file 
    // saved by this example: Get Docusign OAuth2 Access Token

    CkJsonObject jsonToken = new CkJsonObject();
    boolean success = jsonToken.LoadFile("qa_data/tokens/docusign.json");
    if (success != true) {
        Log.i(TAG, "Failed to load docusign.json");
        return;
        }

    // The access token JSON looks like this:

    // {
    //   "access_token": "eyJ0eXA....YQyig",
    //   "token_type": "Bearer",
    //   "refresh_token": "eyJ0eXA....auE3eHKg",
    //   "expires_in": 28800
    // }

    CkOAuth2 oauth2 = new CkOAuth2();

    // For the developer sandbox environment, the token endpoint is https://account-d.docusign.com/oauth/token
    // For the production platform, the token endpoint is https://account.docusign.com/oauth/token
    oauth2.put_TokenEndpoint("https://account-d.docusign.com/oauth/token");

    // Replace these with actual values.
    // The client ID is also known as the "integration key" in Docusign.
    oauth2.put_ClientId("MY_DOCUSIGN_CLIENT_ID");
    // This is your secret key for the authorization code grant.
    oauth2.put_ClientSecret("MY_DOCUSIGN_CLIENT_SECRET");

    // Get the "refresh_token"
    oauth2.put_RefreshToken(jsonToken.stringOf("refresh_token"));

    // Send the HTTP POST to refresh the access token..
    success = oauth2.RefreshAccessToken();
    if (success != true) {
        Log.i(TAG, oauth2.lastErrorText());
        return;
        }

    Log.i(TAG, "New access token: " + oauth2.accessToken());
    Log.i(TAG, "New refresh token: " + oauth2.refreshToken());

    // Update the JSON with the new tokens.
    jsonToken.UpdateString("access_token",oauth2.accessToken());
    jsonToken.UpdateString("refresh_token",oauth2.refreshToken());

    // Save the new JSON access token response to a file.
    CkStringBuilder sbJson = new CkStringBuilder();
    jsonToken.put_EmitCompact(false);
    jsonToken.EmitSb(sbJson);
    sbJson.WriteFile("qa_data/tokens/docusign.json","utf-8",false);

    Log.i(TAG, "OAuth2 authorization granted!");
    Log.i(TAG, "New Access Token = " + oauth2.accessToken());

  }

  static {
      System.loadLibrary("chilkat");

      // Note: If the incorrect library name is passed to System.loadLibrary,
      // then you will see the following error message at application startup:
      //"The application <your-application-name> has stopped unexpectedly. Please try again."
  }
}