@Override
public void handleMessage(Message msg) {
  Object response;
  try {
    switch (msg.what) {
      case MSG_PROVISION:
        response = callback.executeProvisionRequest(uuid, (ProvisionRequest) msg.obj);
        break;
      case MSG_KEYS:
        response = callback.executeKeyRequest(uuid, (KeyRequest) msg.obj);
        break;
      default:
        throw new RuntimeException();
    }
  } catch (Exception e) {
    response = e;
  }
  postResponseHandler.obtainMessage(msg.what, response).sendToTarget();
}
 

private void postProvisionRequest() {
  if (provisioningInProgress) {
    return;
  }
  provisioningInProgress = true;
  ProvisionRequest request = mediaDrm.getProvisionRequest();
  postRequestHandler.obtainMessage(MSG_PROVISION, request).sendToTarget();
}
 

@Override
public byte[] executeProvisionRequest(UUID uuid, ProvisionRequest request) throws IOException {
  String url = request.getDefaultUrl() + "&signedRequest=" + new String(request.getData());
  return DemoUtil.executePost(url, null, null);
}
 

@Override
public byte[] executeProvisionRequest(UUID uuid, ProvisionRequest request)
    throws ClientProtocolException, IOException {
  String url = request.getDefaultUrl() + "&signedRequest=" + new String(request.getData());
  return DemoUtil.executePost(url, null, null);
}
 

@Override
public byte[] executeProvisionRequest(UUID uuid, ProvisionRequest request)
    throws ClientProtocolException, IOException {
  String url = request.getDefaultUrl() + "&signedRequest=" + new String(request.getData());
  return DemoUtil.executePost(url, null, null);
}
 

@Override
public byte[] executeProvisionRequest(UUID uuid, ProvisionRequest request)
    throws ClientProtocolException, IOException {
  String url = request.getDefaultUrl() + "&signedRequest=" + new String(request.getData());
  return ExoplayerUtil.executePost(url, null, null);
}