Open url in groovy using a http proxy

openUrlWithProxy.groovy

setProxies("http");
setProxies("https");

println 'http://www.google.com'.toURL().text

def setProxies(String protocol) {
	String port = new URI(System.getenv("${protocol}_proxy")).port
	String host = new URI(System.getenv("${protocol}_proxy")).host
	
	System.setProperty("http.proxyHost", host);
	System.setProperty("http.proxyPort", port);
}