Thursday, May 22, 2008

Turn Off Hibernation

Turn Off Hibernation

Hibernation is a feature that allows your system to shut down quickly and save everything that is open in the RAM to be stored on the hard drive until the computer is powered on again.

XP and 2000 use a file called hiberfil.sys to save everything it needs when they go go into hibernation. If you never use the hibernate function, you can turn it off.

When this feature is disabled, the hiberfil.sys file is deleted. This can free up the as much disk space as the amount of ram that you computer has. For example, if you have 1GB of RAM, you could be freeing up to 1GB of hard drive space.

In XP, go to Control Panel > Power Options > Hibernation and uncheck / Enable hibernation.

In 2000, go to Control Panel > Power Options > Hibernate / tab and uncheck / Enable hibernate support.

If you should want to re-enable hibernation, go back in and check / Enable hibernation in XP or Enable hibernate support in 2000.
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Monday, May 12, 2008

Add Del.icio.us Link

To add a quick link on your blog to all of the popular traffic-boosting sites.

First thing we need to know the current page URL, TITLE of the page in our site. For that i have written a small java script. The following codes and script are used to add the Del.icio.us link in ur site.

Get the Del.icio.us images and store in to your image folder.

Add the following code in to ur html page.

Click the image to get the source code.



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Sunday, May 4, 2008

Spring Security 2.0

Spring Security 2.0

Spring Security is a security framework that provides security for your spring-based web applications. Spring Security provides a comprehensive security solution, handling authentication and authorization, at both the web request level and at the method invocation level. Spring Security takes full advantage of dependency injection(DI) and aspect-oriented techniques.

Spring security comprises two major operations. The first is known as "Authentication", which is the process of establishing a principal is who they claim to be. "Authorization" refers to the process of deciding whether a principal is allowed to perform an action in your application. To arrive at the point where an authorization decision is needed, the identity of the principal has already been established by the authentication process. These concepts are common, and not at all specific to Spring Security.

Now, we can see the sample application which includes the spring security 2.0

Step by step Configuration

System Requirements
  • Java 1.4 or 1.5
  • Spring Security 2.0
  • Oracle 10g XE (If you need)
  • Jboss 4.0.5
Step 1
Start with dynamic web project in eclipse.
Step 2
Copy the following Jar file in your WEB-INF/lib directory.
Note : Spring Security 2.0 contains more jar files, we do not need all those jar files.

acegi-security-1.0.3.jar

Main classes of the Acegi security system.

commons-codec-1.3.jar

Encoders and decoders such as Base64, Hex, Phonetic and URLs.

ehcache-1.2.3.jar

Used by the authentication provider.

jstl.jar, standard.jar

The JSTL tag library

spring.jar

Spring framework

commons-logging.jar, cglib-nodep-2.1_3.jar

Available in the spring download (spring with dependencies)

Step 3:
Create a Login Page

The following is a listing for the login page.

File Name : login.jsp

<jsp:root version="1.2" xmlns:jsp="http://java.sun.com/JSP/Page"

xmlns:c="urn:jsptld:http://java.sun.com/jsp/jstl/core">

<jsp:directive.page contentType="text/html; charset=UTF-8" />

<jsp:directive.page

import="org.acegisecurity.ui.AbstractProcessingFilter, org.acegisecurity.ui.webapp.AuthenticationProcessingFilter, org.acegisecurity.AuthenticationException" />

<head>

<title>Login</title>

</head>

<body>

<form action="j_acegi_security_check" method="POST">

<table>

<tr>

<td>User:</td>

</td><input type='text' name='j_username' />

</td>

</tr>

<tr>

<td>Password:</td>

<td><input type='password' name='j_password' /></td>

</tr>

<tr>

<td><input type="checkbox" name="_acegi_security_remember_me" /></td>

<td>Remember me (14 days)</td>

</tr>

<tr><td colspan='2'><input name="submit" type="submit" /></td></tr>

<tr><td colspan='2'><input name="reset" type="reset" /></td></tr>

</table>

</form>

</body>

</jsp:root>
Step 4
Create other Jsp Files.
File Name : index.jsp 
<html>

<body>

Everyone

<p><a href="secure/authenticatedusers.jsp">Authenticated users only</a>

<p><a href="secure/admin/admin.jsp">Admins only</a>

</body>

</html>
File Name : denied.jsp 
<html>

<body>

Access Denied.

</body>

</html>
File Name : secure/authenticatedusers.jsp 
<html>

<body>

<%@ page import="org.acegisecurity.context.SecurityContextHolder" %>

<h1>Welcome: <%= SecurityContextHolder.getContext().getAuthentication().getName() %> </h1>

<p><a href="../../">Home</a>

<p><a href="../../j_acegi_logout">Logout</a>

</body>

</html>
File Name: secure/admin/admin.jsp 
<html>

<body>

<%@ page import="org.acegisecurity.context.SecurityContextHolder" %>

<h1>Welcome: <%= SecurityContextHolder.getContext().getAuthentication().getName() %> is an Admin

</h1>

<p><a href="../../">Home</a>

<p><a href="../../j_acegi_logout">Logout</a>

</body>

</html>



Step 5

The users.properties file
File Name : WEB-INF/users.properties

This example uses an in memory user registry and the WEB-INF/users.properties file is used to store the usernames and passwords. add the following in to user.properties file 
scott=tiger,ROLE_USER

harry=potter,ROLE_ADMIN

frodo=baggins,ROLE_USER
Step 6
Configure the Acegi filter in the Web deployment descriptor

File Name : web.xml 
<?xml version="1.0" encoding="UTF-8"?>

<web-app id="WebApp_ID" version="2.4"

xmlns="http://java.sun.com/xml/ns/j2ee"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee

http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

<display-name>SpringSecurity</display-name>



   <filter>

       <filter-name>Acegi Filter Chain Proxy</filter-name>

       <filter-class>org.acegisecurity.util.FilterToBeanProxy</filter-class>

       <init-param>

           <param-name>targetClass</param-name>

           <param-value>org.acegisecurity.util.FilterChainProxy</param-value>

       </init-param>

   </filter>



<filter-mapping>

<filter-name>Acegi Filter Chain Proxy</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>



<listener>

<listener-class>

org.springframework.web.context.ContextLoaderListener

</listener-class>

</listener>



<welcome-file-list>

<welcome-file>index.html</welcome-file>

<welcome-file>index.htm</welcome-file>

<welcome-file>index.jsp</welcome-file>

<welcome-file>default.html</welcome-file>

<welcome-file>default.htm</welcome-file>

<welcome-file>default.jsp</welcome-file>

</welcome-file-list>

</web-app>
Step 7: 
Configure Acegi in applicationContext.xml file

The following is a listing of the WEB-INF/applicationContext.xml file, followed be explanations of the different beans defined in there.
File Name : WEB-INF/applicationContext.xml 
<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">



<beans>



<bean id="filterChainProxy" class="org.acegisecurity.util.FilterChainProxy">

 <property name="filterInvocationDefinitionSource">

   <value>

     CONVERT_URL_TO_LOWERCASE_BEFORE_COMPARISON

     PATTERN_TYPE_APACHE_ANT

     /**=httpSessionContextIntegrationFilter,logoutFilter,authenticationProcessingFilter,securityContextHolderAwareRequestFilter,rememberMeProcessingFilter,anonymousProcessingFilter,exceptionTranslationFilter,filterInvocationInterceptor

   </value>

 </property>

</bean>



<bean id="httpSessionContextIntegrationFilter" class="org.acegisecurity.context.HttpSessionContextIntegrationFilter"/>



<bean id="logoutFilter" class="org.acegisecurity.ui.logout.LogoutFilter">

 <constructor-arg value="/index.jsp"/>

 <constructor-arg>

   <list>

     <ref bean="rememberMeServices"/>

     <bean class="org.acegisecurity.ui.logout.SecurityContextLogoutHandler"/>

   </list>

 </constructor-arg>

</bean>



<bean id="authenticationProcessingFilter" class="org.acegisecurity.ui.webapp.AuthenticationProcessingFilter">

 <property name="authenticationManager" ref="authenticationManager"/>

 <property name="authenticationFailureUrl" value="/login.jsp?errorId=1"/>

 <property name="defaultTargetUrl" value="/"/>

 <property name="filterProcessesUrl" value="/j_acegi_security_check"/>

 <property name="rememberMeServices" ref="rememberMeServices"/>

</bean>



<bean id="securityContextHolderAwareRequestFilter" class="org.acegisecurity.wrapper.SecurityContextHolderAwareRequestFilter"/>



<bean id="rememberMeProcessingFilter" class="org.acegisecurity.ui.rememberme.RememberMeProcessingFilter">

 <property name="authenticationManager" ref="authenticationManager"/>

 <property name="rememberMeServices" ref="rememberMeServices"/>

</bean>



<bean id="anonymousProcessingFilter" class="org.acegisecurity.providers.anonymous.AnonymousProcessingFilter">

 <property name="key" value="changeThis"/>

 <property name="userAttribute" value="anonymousUser,ROLE_ANONYMOUS"/>

</bean>



<bean id="exceptionTranslationFilter" class="org.acegisecurity.ui.ExceptionTranslationFilter">

 <property name="authenticationEntryPoint">

   <bean class="org.acegisecurity.ui.webapp.AuthenticationProcessingFilterEntryPoint">

     <property name="loginFormUrl" value="/login.jsp"/>

     <property name="forceHttps" value="false"/>

   </bean>

 </property>

 <property name="accessDeniedHandler">

   <bean class="org.acegisecurity.ui.AccessDeniedHandlerImpl">

     <property name="errorPage" value="/denied.jsp"/>

   </bean>

 </property>

</bean>



<bean id="filterInvocationInterceptor" class="org.acegisecurity.intercept.web.FilterSecurityInterceptor">

 <property name="authenticationManager" ref="authenticationManager"/>

 <property name="accessDecisionManager">

   <bean class="org.acegisecurity.vote.AffirmativeBased">

     <property name="allowIfAllAbstainDecisions" value="false"/>

     <property name="decisionVoters">

       <list>

         <bean class="org.acegisecurity.vote.RoleVoter"/>

         <bean class="org.acegisecurity.vote.AuthenticatedVoter"/>

       </list>

     </property>

   </bean>

 </property>

 <property name="objectDefinitionSource">

   <value>

     CONVERT_URL_TO_LOWERCASE_BEFORE_COMPARISON

     PATTERN_TYPE_APACHE_ANT

     /secure/admin/**=ROLE_ADMIN

     /secure/**=IS_AUTHENTICATED_REMEMBERED

     /**=IS_AUTHENTICATED_ANONYMOUSLY

   </value>

 </property>

</bean>



<bean id="rememberMeServices" class="org.acegisecurity.ui.rememberme.TokenBasedRememberMeServices">

 <property name="userDetailsService" ref="userDetailsService"/>

 <property name="tokenValiditySeconds" value="1800"></property>

 <property name="key" value="changeThis"/>

</bean>



<bean id="authenticationManager" class="org.acegisecurity.providers.ProviderManager">

 <property name="providers">

   <list>

     <ref local="daoAuthenticationProvider"/>

     <bean class="org.acegisecurity.providers.anonymous.AnonymousAuthenticationProvider">

       <property name="key" value="changeThis"/>

     </bean>

     <bean class="org.acegisecurity.providers.rememberme.RememberMeAuthenticationProvider">

       <property name="key" value="changeThis"/>

     </bean>

   </list>

 </property>

</bean>



<bean id="daoAuthenticationProvider" class="org.acegisecurity.providers.dao.DaoAuthenticationProvider">

 <property name="userDetailsService" ref="userDetailsService"/>

 <property name="userCache">

   <bean class="org.acegisecurity.providers.dao.cache.EhCacheBasedUserCache">

     <property name="cache">

       <bean class="org.springframework.cache.ehcache.EhCacheFactoryBean">

         <property name="cacheManager">

           <bean class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"/>

         </property>

         <property name="cacheName" value="userCache"/>

       </bean>

     </property>

   </bean>

 </property>

</bean>



<bean id="userDetailsService" class="org.acegisecurity.userdetails.memory.InMemoryDaoImpl">

 <property name="userProperties">

   <bean class="org.springframework.beans.factory.config.PropertiesFactoryBean">

     <property name="location" value="/WEB-INF/users.properties"/>

   </bean>

 </property>

</bean>



<bean id="loggerListener" class="org.acegisecurity.event.authentication.LoggerListener"/>



</beans>

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