(Android™) Get eBay Application Token

This example shows how to request an eBay Application token.

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.

    // See the Ebay documentation about Access token types
    // Also see the Ebay documentation about client credentials grant flow

    CkHttp http = new CkHttp();

    // If using the sandbox, the target endpoint will be:
    // POST https://api.sandbox.ebay.com/identity/v1/oauth2/token

    // If using the production (live) system, the target endpoint will be:
    // POST https://api.ebay.com/identity/v1/oauth2/token

    // The eBay client_id and client_secret needs to be sent
    // in a Basic Authorization  request header, which has this format:
    // Authorization: Basic <B64_encoded_oauth_credentials>

    // Chilkat takes care of it.  You only need to set the Login = client_id,
    // and password = client_secret, and indicate you want "Basic" HTTP Authorization.
    http.put_Login("EBAY_CLIENT_ID");
    http.put_Password("EBAY_CLIENT_SECRET");
    http.put_BasicAuth(true);

    // Let's do the following POST:

    //   HTTP method:   POST
    //   URL (Sandbox): https://api.sandbox.ebay.com/identity/v1/oauth2/token
    // 
    //   HTTP headers:
    //     Content-Type = application/x-www-form-urlencoded
    //     Authorization = Basic <B64-encoded-oauth-credentials>
    // 
    //   Request body (wrapped for readability):
    //     grant_type=client_credentials&
    //     redirect_uri=<RuName-value>&
    //     scope=<SPACE separated list of scopes>
    // 

    // Create an HttpRequest object to hold the request params.
    CkHttpRequest req = new CkHttpRequest();
    req.put_HttpVerb("POST");
    req.AddParam("grant_type","client_credentials");

    // The scope query param indicates the access to be provided by the token.
    // Multiple scopes can be specified by separating each with a SPACE char.
    // See the Ebay OAuth scopes documentation

    req.AddParam("scope","https://api.ebay.com/oauth/api_scope");

    // (The PostUrlEncoded method automatically sets the Content-Type header equal to "application/x-www-form-urlencoded")
    String endPoint = "https://api.sandbox.ebay.com/identity/v1/oauth2/token";
    CkHttpResponse resp = http.PostUrlEncoded(endPoint,req);
    if (http.get_LastMethodSuccess() != true) {
        Log.i(TAG, http.lastErrorText());
        return;
        }

    // The response is JSON..
    CkJsonObject json = new CkJsonObject();
    json.Load(resp.bodyStr());
    json.put_EmitCompact(false);

    // If the response status code is not 200, then it failed.
    Log.i(TAG, "Response status code = " + String.valueOf(resp.get_StatusCode()));
    if (resp.get_StatusCode() != 200) {
        Log.i(TAG, json.emit());
        Log.i(TAG, "Failed.");
        return;
        }

    // We successfully retrieved an eBay access token.
    // The actual access token string can be parsed from the JSON like this:
    String accessToken = json.stringOf("access_token");

    // This application token is only valid for 7200 seconds (2 hours).  We'll want to refresh
    // it before it expires.  (There is an online example for that..)
    // For now, let's save the JSON to a file for our application to use.

    // But before doing that, let's add to the JSON an expiration timestamp
    // so we know when to refresh the token.
    CkDateTime dtExpire = new CkDateTime();
    dtExpire.SetFromCurrentSystemTime();
    dtExpire.AddSeconds(json.IntOf("expires_in"));
    json.AppendString("expire_time",dtExpire.getAsTimestamp(false));

    // Persist the JSON to a file.
    CkFileAccess fac = new CkFileAccess();
    boolean success = fac.WriteEntireTextFile("qa_data/tokens/ebay.json",json.emit(),"utf-8",false);
    if (success != true) {
        Log.i(TAG, fac.lastErrorText());
        Log.i(TAG, "Failed to save eBay Application token to file.");
        return;
        }

    Log.i(TAG, json.emit());
    Log.i(TAG, "Success.");

    // The output of this example is:

    // 	{ 
    // 	  "access_token": "v^1.1#i^1#p^1#I^3#r^0# ... Ajp1BQhJDgAA",
    // 	  "token_type": "Application Access Token",
    // 	  "expires_in": 7200,
    // 	  "refresh_token": "N/A",
    // 	  "expire_time": "2017-04-16T14:44:20Z"
    // 	}
    // 
    // 	Success.
    // 

  }

  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."
  }
}