/**
 * Replicates {@link ApacheHttpTransport#newDefaultHttpClient()} with one exception:
 *
 * 1 retry is allowed.
 *
 * @see DefaultHttpRequestRetryHandler
 */
DefaultHttpClient newDefaultHttpClient(
    SSLSocketFactory socketFactory, HttpParams params, ProxySelector proxySelector) {
  SchemeRegistry registry = new SchemeRegistry();
  registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
  registry.register(new Scheme("https", socketFactory, 443));
  ClientConnectionManager connectionManager = new ThreadSafeClientConnManager(params, registry);
  DefaultHttpClient defaultHttpClient = new DefaultHttpClient(connectionManager, params);
  // retry only once
  defaultHttpClient.setHttpRequestRetryHandler(new DefaultHttpRequestRetryHandler(1, true));
  if (proxySelector != null) {
    defaultHttpClient.setRoutePlanner(new ProxySelectorRoutePlanner(registry, proxySelector));
  }
  defaultHttpClient.setKeepAliveStrategy((response, context) -> KEEP_ALIVE_DURATION);
  return defaultHttpClient;
}
 

/**
 * Creates a new instance of the Apache HTTP client that is used by the {@link
 * #ApacheHttpTransport()} constructor.
 *
 * @param socketFactory SSL socket factory
 * @param params HTTP parameters
 * @param proxySelector HTTP proxy selector to use {@link ProxySelectorRoutePlanner} or {@code
 *     null} for {@link DefaultHttpRoutePlanner}
 * @return new instance of the Apache HTTP client
 */
static DefaultHttpClient newDefaultHttpClient(
    SSLSocketFactory socketFactory, HttpParams params, ProxySelector proxySelector) {
  // See http://hc.apache.org/httpcomponents-client-ga/tutorial/html/connmgmt.html
  SchemeRegistry registry = new SchemeRegistry();
  registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
  registry.register(new Scheme("https", socketFactory, 443));
  ClientConnectionManager connectionManager = new ThreadSafeClientConnManager(params, registry);
  DefaultHttpClient defaultHttpClient = new DefaultHttpClient(connectionManager, params);
  defaultHttpClient.setHttpRequestRetryHandler(new DefaultHttpRequestRetryHandler(0, false));
  if (proxySelector != null) {
    defaultHttpClient.setRoutePlanner(new ProxySelectorRoutePlanner(registry, proxySelector));
  }
  return defaultHttpClient;
}
 

private void setDefaultProxy() {
	HttpHost currentProxy = ( HttpHost )client.getParams().getParameter( ConnRoutePNames.DEFAULT_PROXY );

	if ( currentProxy == null ) {
		ProxySelectorRoutePlanner routePlanner = new ProxySelectorRoutePlanner( client.getConnectionManager().getSchemeRegistry(), ProxySelector.getDefault() );
		client.setRoutePlanner( routePlanner );
	}
}