1 val http_pattern = """\"https?://[^\"]*\"""".r

     2 val my_urls = """urbanc""".r

     3 val email_pattern = 

     4   """([a-z0-9_\.-]+)@([\da-z\.-]+)\.([a-z\.]{2,6})""".r

     5 

     6 def crawl(url: String, n: Int) : Unit = {

     7   if (n == 0) ()

     8   else {

     9     println("Visiting: " + n + " " + url)

    10     val page = get_page(url)

    11     println(email_pattern.findAllIn(page).mkString("\n"))

    12     for (u <- get_all_URLs(page)) crawl(u, n - 1)

    13   }

    14 }