Opening an URL with a proxy

Set proxy config.

System.properties.putAll( ["http.proxyHost":"proxy-host", "http.proxyPort":"proxy-port"] )
	def url = 'http://www.google.com/images/logo.gif'
	def file = new FileOutputStream(address.tokenize("/")[-1])
	def out = new BufferedOutputStream(file)
	out << new URL(address).openStream()
	out.close()

Change proxy-host and proxy-port to your lokal proxy server.