(Android™) Auth0 Server-to-Server Access Token (Client Credentials flow)

Demonstrates how to obtain an Auth0 access token using client credentials (client_id and client_secret).

This is just a matter of duplicating this CURL command:

curl --request POST
  --url 'https://chilkat.auth0.com/oauth/token' \
  --header 'content-type: application/json' \
  --data '{"grant_type":"client_credentials","client_id": "xxxx","client_secret": "xxxx","audience": "https://api.example.com/geocoding/v1/"}'

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

    // We want to duplicate this curl command:
    // 
    // curl --request POST
    //   --url 'https://chilkat.auth0.com/oauth/token' \
    //   --header 'content-type: application/json' \
    //   --data '{"grant_type":"client_credentials","client_id": "my_client_id","client_secret": "my_client_secret","audience": "https://api.example.com/geocoding/v1/"}'

    // Build the JSON body of the request.
    CkJsonObject json = new CkJsonObject();
    json.UpdateString("grant_type","client_credentials");
    json.UpdateString("client_id","AUTH0-CLIENT-ID");
    json.UpdateString("client_secret","AUTH0-CLIENT-SECRET");
    json.UpdateString("audience","https://api.example.com/geocoding/v1/");

    // IMPORTANT: You would use your own url.  You would not use "chilkat.auth0.com".  
    // Instead you would use "your_name.auth0.com"
    CkHttp http = new CkHttp();
    CkHttpResponse resp = http.PostJson3("https://chilkat.auth0.com/oauth/token","application/json",json);
    if (http.get_LastMethodSuccess() != true) {
        Log.i(TAG, http.lastErrorText());
        return;
        }

    // A 200 response status code indicates success.  In the success case, the response body
    // contains the JSON access token, such as: 
    // {
    //   "access_token": "eyJz93a...k4laUWw",
    //   "token_type":"Bearer",
    //   "expires_in":86400
    // }
    // 

    Log.i(TAG, "response status code = " + String.valueOf(resp.get_StatusCode()));

    // The repsonse is JSON if successful and also JSON for errors.
    CkJsonObject jsonResp = new CkJsonObject();
    jsonResp.put_EmitCompact(false);
    jsonResp.Load(resp.bodyStr());

    if (resp.get_StatusCode() != 200) {
        // The response body contains error information in JSON format.
        Log.i(TAG, jsonResp.emit());

        // An example of an error response:
        // 		{
        // 		  "error": "access_denied",
        // 		  "error_description": "Client is not authorized to access \"https://api.example.com/geocoding/v1/\". You might probably want to create a \"client-grant\" associated to this API. See: https://auth0.com/docs/api/v2#!/Client_Grants/post_client_grants"
        // 		}
        return;
        }

    Log.i(TAG, "Success!");
    Log.i(TAG, jsonResp.emit());

    // A successful JSON response body looks like this:

    // {
    //   "access_token": "eyJz93a...k4laUWw",
    //   "token_type":"Bearer",
    //   "expires_in":86400
    // }


  }

  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."
  }
}