A simple Groovy script to scrape all URLs from a given string and download the content from those URLs

DownloadURLs.groovy

import java.util.regex.Matcher
import java.util.regex.Pattern

Pattern urlPattern = Pattern.compile("\\b(https?|ftp|file)://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]",Pattern.CASE_INSENSITIVE);

String urlString = """This is a big string with lots of Image URL like: http://i.istockimg.com/file_thumbview_approve/69656987/3/stock-illustration-69656987-vector-of-flat-icon-life-buoy.jpg and
http://i.istockimg.com/file_thumbview_approve/69943823/3/stock-illustration-69943823-beach-ball.jpg few others below
http://i.istockimg.com/file_thumbview_approve/40877104/3/stock-photo-40877104-pollen-floating-on-water.jpg
http://i.istockimg.com/file_thumbview_approve/68944343/3/stock-illustration-68944343-ship-boat-flat-icon-with-long-shadow.jpg
"""

Matcher matcher = urlPattern.matcher(urlString);
while (matcher.find()) {
	String address = matcher.group()
	println("Got URL: " + address);

	new File("./" + address.tokenize("/").last()).withOutputStream { out ->
		out << new URL(address).openStream()
	}
}

// References:
// 1. http://stackoverflow.com/questions/5713558/detect-and-extract-url-from-a-string
// 2. http://stackoverflow.com/questions/4674995/groovy-download-image-from-url