Groovy: scrape mp3 links in html and download all

scrape.groovy

@Grab(group='net.sourceforge.nekohtml', module='nekohtml', version='1.9.18')
import org.cyberneko.html.parsers.SAXParser

def download(address)
{
	def file = new FileOutputStream(address.tokenize("/")[-1])
	def out = new BufferedOutputStream(file)
	out << new URL(address).openStream()
	out.close()
}

def url = 'http://foo.bar/audio'
def html = new XmlSlurper(new SAXParser()).parse(url)
def mp3 = html.'**'.findAll { it.@href =~ 'mp3' }
def total = mp3.size
def i = 0
mp3.each {
	download "${url}/${it.@href}"
	println "downloaded file ${++i} of ${total}: ${url}/${it.@href}"
}