gistfile1.java

import groovyx.net.http.*
import static groovyx.net.http.ContentType.*
import static groovyx.net.http.Method.*

def dlUrl = 'http://helheim.sh.cvut.cz'
def dlPath = '/~dizzi/autodl/'
def dlLocPath = 'd:/'


def http = new HTTPBuilder( dlUrl )

// perform a GET request, expecting JSON response data
http.request( GET, TEXT ) {
  uri.path = dlPath
  // response handler for a success response code:
  response.success = { resp, text ->
    text.eachLine { line ->
        if (line.startsWith("<li>")){
            println(line)
            match = (line =~ /(?<=href=\")(.*)(?=\">)/)
            if (match.getCount()>=1){
                dlFileName=match[0][0]
                println(dlFileName)
                println(dlUrl+dlPath+dlFileName)

                def file = new File(dlLocPath+dlFileName)

                if (file.exists()){
                    println("File already exists... skipping")
                } else {
                    def fos = new FileOutputStream(file)
                    def out = new BufferedOutputStream(fos)
                    println("Saving file...")
                    out << new URL(dlUrl+dlPath+dlFileName).openStream()
                    out.close()
                }

            }
        }

    }
  }

  // handler for any failure status code:
  response.failure = { resp ->
    println "Unexpected error: ${resp.statusLine.statusCode} : ${resp.statusLine.reasonPhrase}"
  }
}