Added clearCookie().

git-svn-id: https://samskivert.googlecode.com/svn/trunk@1248 6335cc39-0255-0410-8fd6-9bcaacd3b74c

projects/samskivert/src/java/com/samskivert/servlet/user/UserManager.java

@@ -1,5 +1,5 @@
 //
-// $Id: UserManager.java,v 1.19 2003/10/08 23:52:50 ray Exp $
+// $Id: UserManager.java,v 1.20 2003/10/09 00:48:37 ray Exp $
 //
 // samskivert library - useful routines for java programs
 // Copyright (C) 2001 Michael Bayne
@@ -261,10 +261,7 @@ public class UserManager
 	}
 
 	// set them up the bomb
-	Cookie rmcookie = new Cookie(USERAUTH_COOKIE, authcode);
-	rmcookie.setPath("/");
-	rmcookie.setMaxAge(0);
-	rsp.addCookie(rmcookie);
+        CookieUtil.clearCookie(rsp, USERAUTH_COOKIE);
     }
 
     /** The user repository. */

projects/samskivert/src/java/com/samskivert/servlet/util/CookieUtil.java

@@ -1,10 +1,11 @@
 //
-// $Id: CookieUtil.java,v 1.1 2003/10/06 22:50:28 ray Exp $
+// $Id: CookieUtil.java,v 1.2 2003/10/09 00:48:37 ray Exp $
 
 package com.samskivert.servlet.util;
 
 import javax.servlet.http.Cookie;
 import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
 
 /**
  * Utility methods for dealing with cookies.
@@ -37,4 +38,15 @@ public class CookieUtil
         Cookie c = getCookie(req, name);
         return (c == null) ? null : c.getValue();
     }
+
+    /**
+     * Clear the cookie with the specified name.
+     */
+    public static void clearCookie (HttpServletResponse rsp, String name)
+    {
+        Cookie c = new Cookie(name, "x");
+        c.setPath("/");
+        c.setMaxAge(0);
+        rsp.addCookie(c);
+    }
 }