diff -r 22f027da67ec -r 9c968d0de9a0 progs/Application4.scala
--- a/progs/Application4.scala	Sat Oct 04 00:36:51 2014 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,52 +0,0 @@
-package controllers
-
-import play.api.mvc._
-import java.security.MessageDigest
-
-/*
- * Application sets a cookie in plain ASCII on the
- * clients browser recording the visits of a page.
- *
- * The cookie data is hashed and salted with a
- * secret key.
- */
-
-
-object Application extends Controller {
-
-  //secret key for salting 
-  val salt = "my secret key"
-
-  //SHA-1 + salt
-  def mk_hash(s: String) : String = {
-    val hash_fun = MessageDigest.getInstance("SHA-1")
-    hash_fun.digest((s + salt).getBytes).map{ "%02x".format(_) }.mkString
-  }
-
-  def gt_cookie(c: Cookie) : Int = c.value.split("/") match {
-    case Array(s, h) if (s.forall(_.isDigit) && mk_hash(s) == h) => s.toInt 
-    case _ => 0
-  }
-
-  def mk_cookie(i: Int) : Cookie = {
-    val hash = mk_hash(i.toString)
-    Cookie("visits", s"$i/$hash")
-  }
-   
-  def index = Action { request =>
-
-    val visits_cookie = request.cookies.get("visits")
-    val visits = visits_cookie.map(gt_cookie).getOrElse(0)
-
-    val msg = 
-      if (visits >= 10)
-        s"You are a valued customer who has visited this site $visits times."               
-      else s"You have visited this site $visits times."
-    
-    Ok(msg).withCookies(mk_cookie(visits + 1))
-  }     
-}
-
-
-
-