groovy - connect to URL through proxy

gistfile1.groovy

import java.net.*;
import java.io.*;
 
/* PROXY SETTINGS */ 
System.getProperties().put("proxySet", "true");
System.getProperties().put("proxyHost", "some.proxyserver.com");
System.getProperties().put("proxyPort", "8080");
 
Authenticator.setDefault(new MyAuthenticator());
 
URL url = new URL("http://www.google.com"); /* WHERE WE WANT TO CONNECT */
URLConnection conn = url.openConnection();
 
println url.text /* show content of target html response - throws exception when proxy or authentication doesn't work */
 
class MyAuthenticator extends Authenticator{
   protected PasswordAuthentication getPasswordAuthentication(){
         /* our proxy uses domain login */
         return new PasswordAuthentication("domain\\username", "password".toCharArray()); /* CHANGE HERE */
   }
}
               

As alternative, it's possible to define proxy env variables on system level and specify "-Djava.net.useSystemProxies=true" for Groovy. First line of Groovy script can be like this:

#!/usr/bin/env groovy -Djava.net.useSystemProxies=true

It can not work in my centos :(

Caught: java.net.ConnectException: Connection refused (Connection refused)
java.net.ConnectException: Connection refused (Connection refused)