if (cn == null) { return; }   if (ie) { cn = null; return; }  ((HttpURLConnection) cn).disconnect(); cn = null;
if (cn == null) { return; }  if (cn instanceof HttpURLConnection) { ((HttpURLConnection) cn).disconnect(); }  cn = null;
  public void close()			throws IOException  {    if (cn == null) {      return;    }        // workaround for IE    if (ie) {      cn = null;      return;    }        ((HttpURLConnection) cn).disconnect();    cn = null;  }