    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <%@page contentType="text/html; charset=UTF-8" %>
    <html>
    <!--
     Licensed to the Apache Software Foundation (ASF) under one or more
      contributor license agreements.  See the NOTICE file distributed with
      this work for additional information regarding copyright ownership.
      The ASF licenses this file to You under the Apache License, Version 2.0
      (the "License"); you may not use this file except in compliance with
      the License.  You may obtain a copy of the License at

          http://www.apache.org/licenses/LICENSE-2.0

      Unless required by applicable law or agreed to in writing, software
      distributed under the License is distributed on an "AS IS" BASIS,
      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      See the License for the specific language governing permissions and
      limitations under the License.
    -->
    <head>
       <title>JSP Chat</title>
    </head>

    <body bgcolor="#FFFFFF">

    <form method="POST" action='chat' name="postForm">
    <input type="hidden" name="action" value="post">
    Message: <input type="text" name="message">
    <input type="submit">
    </form>

    <br>
    <%
      String serverName = request.getServerName();
      if ("localhost".equals(serverName)) {
          serverName = "127.0.0.1";
      } else if ("127.0.0.1".equals(serverName)) {
          serverName = "localhost";
      }

      String chatUrl = request.getScheme() + "://" + serverName + ":"
        + request.getServerPort() + request.getContextPath()
        + request.getServletPath();

      // strip "post.jsp" from the address
      chatUrl = chatUrl.substring(0, chatUrl.lastIndexOf("/") + 1);
    %>
    <a target="_blank" href="<%=chatUrl %>">Click to open a new chat window</a>
    <em>Note</em>: To avoid hitting the limit on the count of simultaneous
    connections to the same host, imposed by the
    <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec8.html#sec8.1.4">HTTP specification</a>,
    the second chat window should be opened using a different URL, e.g. with
    an IP address instead of the host name.
    </body>
    </html>