Wikipedia scraping: groovy wikipedia.groovy <keyword> キャッシュ機能付き

wikipedia.groovy

@Grab(group='org.jsoup', module='jsoup', version='1.6.1')
import org.jsoup.*

def keyword = 'Groovy'

if(args && args[0]) keyword = args[0]

def home = System.getProperty('user.home')
def tmp = home + '/tmp'

println getOrRestore(keyword, tmp)

def getOrRestore(name, tmp){
  def file = new File("${tmp}/${name}Exp.txt")
  if(file.exists()){
    return file.text
  } else {
    def exp = Jsoup.connect("http://ja.wikipedia.org/wiki/${URLEncoder.encode(name,'UTF-8')}").get().text()
    file.withWriter{ it.print exp }
    return exp
  }
}