Android™

citi Developer OAuth2 Client Credentials Grant

See more OAuth2 Examples

Get access token for your application credentials. You can use this for citi APIs which do not require customer credential verification and consent (e.g. Onboarding). Android™

// 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);

    boolean success = false;

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

    CkHttp http = new CkHttp();

    // Implements the following CURL command:

    // curl --request POST \
    //   --url https://sandbox.apihub.citi.com/gcb/api/clientCredentials/oauth2/token/us/gcb \
    //   --header 'accept: application/json' \
    //   --user client-id:client-secret \
    //   --header 'content-type: application/x-www-form-urlencoded' \
    //   --data 'grant_type=client_credentials&scope=%2Fapi'

    http.put_Login("client-id");
    http.put_Password("client-secret");

    CkHttpRequest req = new CkHttpRequest();
    req.put_HttpVerb("POST");
    req.put_Path("/gcb/api/clientCredentials/oauth2/token/us/gcb");
    req.put_ContentType("application/x-www-form-urlencoded");
    req.AddParam("grant_type","client_credentials");
    req.AddParam("scope","/api");
    req.AddHeader("accept","application/json");

    CkHttpResponse resp = new CkHttpResponse();
    success = http.HttpReq("https://sandbox.apihub.citi.com/gcb/api/clientCredentials/oauth2/token/us/gcb",req,resp);
    if (success == false) {
        Log.i(TAG, http.lastErrorText());
        return;
        }

    CkStringBuilder sbResponseBody = new CkStringBuilder();
    resp.GetBodySb(sbResponseBody);
    CkJsonObject jResp = new CkJsonObject();
    jResp.LoadSb(sbResponseBody);
    jResp.put_EmitCompact(false);

    Log.i(TAG, "Response Body:");
    Log.i(TAG, jResp.emit());

    int respStatusCode = resp.get_StatusCode();
    Log.i(TAG, "Response Status Code = " + String.valueOf(respStatusCode));
    if (respStatusCode >= 400) {
        Log.i(TAG, "Response Header:");
        Log.i(TAG, resp.header());
        Log.i(TAG, "Failed.");
        return;
        }

    success = jResp.WriteFile("qa_data/tokens/citi_client_credentials.json");
    if (success == false) {
        Log.i(TAG, "Failed to save JSON access token file.");
        return;
        }

    //  Sample JSON response:
    //  (Sample code for parsing the JSON response is shown below)

    //  {
    //    "token_type": "bearer",
    //    "access_token": "AAIkMjdh ... 3fsWb7zJ0s",
    //    "expires_in": 1800,
    //    "consented_on": 1584817860,
    //    "scope": "/api"
    //  }

    //  Sample code for parsing the JSON response...
    //  Use the following online tool to generate parsing code from sample JSON:
    //  Generate Parsing Code from JSON

    String token_type = jResp.stringOf("token_type");
    String access_token = jResp.stringOf("access_token");
    int expires_in = jResp.IntOf("expires_in");
    int consented_on = jResp.IntOf("consented_on");
    String scope = jResp.stringOf("scope");

  }

  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."
  }
}