InvalidSessionStrategy when session expired and ajax request is done.

JsfRedirectStrategy.java

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.security.web.session.InvalidSessionStrategy;
import org.springframework.util.StringUtils;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * Inspired by <a href="http://stackoverflow.com/questions/10143539/jsf-2-spring-security-3-x-and-richfaces-4-redirect-to-login-page-on-session-tim">StackOverflow.com</a>
 * and by <a href="http://www.icesoft.org/wiki/display/ICE/Spring+Security#SpringSecurity-Step4%3AConfigureYourSpringSecurityredirectStrategy">Spring Security 3 and ICEfaces 3 Tutorial</a>.
 *
 * @author banterCZ
 */
public class JsfRedirectStrategy implements InvalidSessionStrategy {

    private Logger logger = LoggerFactory.getLogger(getClass());

    private static final String FACES_REQUEST_HEADER = "faces-request";

    private String invalidSessionUrl;

    /**
     * {@inheritDoc}
     */
    @Override
    public void onInvalidSessionDetected(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {        

        boolean ajaxRedirect = "partial/ajax".equals(request.getHeader(FACES_REQUEST_HEADER));
        if(ajaxRedirect) {
            String contextPath = request.getContextPath();
            String redirectUrl = contextPath + invalidSessionUrl;
            logger.debug("Session expired due to ajax request, redirecting to '{}'", redirectUrl);
            
            String ajaxRedirectXml = createAjaxRedirectXml(redirectUrl);
            logger.debug("Ajax partial response to redirect: {}", ajaxRedirectXml);

            response.setContentType("text/xml");
            response.getWriter().write(ajaxRedirectXml);
        } else {
            String requestURI = getRequestUrl(request);
            logger.debug("Session expired due to non-ajax request, starting a new session and redirect to requested url '{}'", requestURI);
            request.getSession(true);
            response.sendRedirect(requestURI);
        }

    }

    private String getRequestUrl(HttpServletRequest request) {
        StringBuffer requestURL = request.getRequestURL();

        String queryString = request.getQueryString();
        if (StringUtils.hasText(queryString)) {
            requestURL.append("?").append(queryString);
        }

        return requestURL.toString();
    }

    private String createAjaxRedirectXml(String redirectUrl) {
        return new StringBuilder()
                        .append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>")
                        .append("<partial-response><redirect url=\"")
                        .append(redirectUrl)
                        .append("\"></redirect></partial-response>")
                        .toString();
    }

    public void setInvalidSessionUrl(String invalidSessionUrl) {
        this.invalidSessionUrl = invalidSessionUrl;
    }

}

security.xml

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:sec="http://www.springframework.org/schema/security"
       xsi:schemaLocation="http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.1.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd">

    <sec:http pattern="/pages/public/**" security="none"/>
    <sec:http pattern="/javax.faces.resource/**" security="none"/>

    <sec:http use-expressions="true" >
        <sec:custom-filter ref="sessionManagementFilter" before="SESSION_MANAGEMENT_FILTER" />
        <sec:intercept-url pattern="/pages/protected/**" access="isAuthenticated()" />
        <sec:form-login login-page='/pages/public/login.xhtml' default-target-url="/pages/protected/index.xhtml"
                        authentication-failure-url="/pages/public/login.xhtml?failure=true" />
        <sec:logout logout-success-url="/pages/public/login.xhtml"/>
    </sec:http>

    <sec:authentication-manager>
        <sec:authentication-provider>
            <sec:user-service>
                <sec:user name="joe" password="password" authorities="ROLE_USER"/>
            </sec:user-service>
        </sec:authentication-provider>
    </sec:authentication-manager>

    <bean id="sessionManagementFilter" class="org.springframework.security.web.session.SessionManagementFilter">
        <constructor-arg name="securityContextRepository" ref="httpSessionSecurityContextRepository" />
        <property name="invalidSessionStrategy" ref="jsfRedirectStrategy" />
    </bean>

    <bean id="jsfRedirectStrategy" class="JsfRedirectStrategy">
        <property name="invalidSessionUrl" value="/pages/public/error/viewExpired.xhtml" />
    </bean>

    <bean id="httpSessionSecurityContextRepository" class="org.springframework.security.web.context.HttpSessionSecurityContextRepository"/>

</beans>

viewExpired.xhtml

<ui:composition template="/WEB-INF/templates/public_layout.xhtml"
     xmlns="http://www.w3.org/1999/xhtml"
     xmlns:h="http://java.sun.com/jsf/html"
     xmlns:ui="http://java.sun.com/jsf/facelets"
>

    <ui:param name="title" value="#{msg['error.viewExpired.title']}" />

    <ui:define name="content">
        #{msg['error.viewExpired.text']}
        <h:outputLink value="#{header['referer']}">#{msg['link.back']}</h:outputLink>
    </ui:define>
</ui:composition>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 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_3_0.xsd">

    <servlet>
        <servlet-name>Faces Servlet</servlet-name>
        <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            classpath:security.xml
        </param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <listener>
        <listener-class>org.springframework.security.web.session.HttpSessionEventPublisher</listener-class>
    </listener>

    <servlet-mapping>
        <servlet-name>Faces Servlet</servlet-name>
        <url-pattern>*.xhtml</url-pattern>
    </servlet-mapping>

    <filter>
        <filter-name>springSecurityFilterChain</filter-name>
        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>springSecurityFilterChain</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

</web-app>

Thanks!!!