problems with form-based authentication

ResourceServlet

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <servlet>
    <description>This is the description of my J2EE component</description>
    <display-name>This is the display name of my J2EE component</display-name>
    <servlet-name>ResourceServlet</servlet-name>
    <servlet-class>edu.city.foo.ResourceServlet</servlet-class>
  </servlet>

<servlet-mapping>
    <servlet-name>ResourceServlet</servlet-name>
    <url-pattern>/resourceServlet.do</url-pattern>
  </servlet-mapping>
  
  <security-constraint>
  	<web-resource-collection>
  		<web-resource-name>ResourceServlet</web-resource-name>
  		<url-pattern>/ResourceServlet</url-pattern>
  		<http-method>POST</http-method>
  	</web-resource-collection>
  	<auth-constraint>
  		<description>Who can access the resource</description>
  		<role-name>Admin</role-name>
  		<role-name>Guest</role-name>
  	</auth-constraint>
  	<user-data-constraint>
  		<description>How to keep data safety</description>
  		<transport-guarantee>CONFIDENTIAL</transport-guarantee>
  	</user-data-constraint>
  </security-constraint>
  
  <security-role>
  	<role-name>Admin</role-name>
  </security-role>
  
  <security-role>
  	<role-name>Guest</role-name>
  </security-role>
  
  <login-config>
  	<auth-method>FORM</auth-method>
  	<form-login-config>
  		<form-login-page>/login.jsp</form-login-page>
  		<form-error-page>/error.jsp</form-error-page>
  	</form-login-config>  	
  </login-config>
  
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

login.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>My JSP 'login.jsp' starting page</title>
    
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">

</head>
  
  <body>
  <center>
    <form action="j_security_check" method="post">
    <table>
    	<tr>
    		<td>username</td>
    		<td><input type="text" name="j_username"><br></td>
    	</tr>
    	<tr>
    		<td>password</td>
    		<td><input type="password" name="j_password"><p></td>
    	</tr>
    	<tr>
    		<td></td>
    		<td align="center"><input type="submit" value="submit"></td>
    	</tr>
    </table>
    </form>
   </center>
  </body>
</html>

error.jsp

welcome.jsp

tomcat-users.xml

<?xml version='1.0' encoding='utf-8'?>
<!--
  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.
-->
<tomcat-users>


  <role rolename="Guest"/>
  <role rolename="Admin"/>
  <user username="zhang" password="zhang" roles="Admin"/>
  <user username="sun" password="sun" roles="Guest"/>

</tomcat-users>

webpage
I'll very thankfull someone,who can help me to solve the problem!

What problem ?

You shouldn't be accessing login.jsp directly. You should be accessing the /ResourceServlet via a POST. Only in this case will the login page be automatically shown.

Christophe Verré wrote:What problem ?

You shouldn't be accessing login.jsp directly. You should be accessing the /ResourceServlet via a POST. Only in this case will the login page be automatically shown.

It also doesn' work!
webpage

Exactly what happens when you hit /resourceServlet.do

Try changing this part

To

Try changing http-method to GET as well.

Even by changing the URL PATTERN it does not work...
As per my knowledge, whenever the welcome-file is called, it should redirect to login.jsp.
for e.g : my welcome file is index.jsp, and when called the base path, i get index.jsp without authentication...

Zhang Jones wrote:
It also doesn' work!
webpage

If you're typing that in your browser's url address, you'll send a GET request, not a POST.

Try adding index.jsp to web-resource-collection, make sure you use GET method.
You can try constraining all URLS "/**" just to make sure your configuration works.

Once you know it works, you can change it to some thing like /private/* and have all your URLs that need authentication under this path.

And when pasting a link to your local machine, eg http://localhost in forum, don't use the URL bb code, because you don't want to make it clickable.

sudhir nim wrote:Exactly what happens when you hit /resourceServlet.do

Try changing this part
<web-resource-collection> <web-resource-name>ResourceServlet</web-resource-name> <url-pattern>/ResourceServlet</url-pattern> <http-method>POST</http-method> </web-resource-collection>

To

<web-resource-collection> <web-resource-name>ResourceServlet</web-resource-name> <url-pattern>/resourceServlet.do</url-pattern> <http-method>POST</http-method> </web-resource-collection>

Try changing http-method to GET as well.

Thank you, but it doesn't work!