3

所以我有一个使用 jsf 和 primefaces 进行前端演示的 Web 应用程序。

我们将 Spring 安全性用于登录机制，并已将并发定义为

<session-management session-fixation-protection="newSession">
<concurrency-control max-sessions="1" error-if-maximum-exceeded="true" 
expired-url="multipleLogins.xhtml" />
</session-management>

问题似乎是当用户从不同的浏览器进行两次登录时，某些按钮会执行不会触发重定向的 ajax 操作。似乎只有提交表单或重定向到页面本身的按钮才能识别多个登录操作。

例如，这个按钮

<p:commandButton id="retrieve" value="#{msgs.BUTTON_RETRIEVE}"
action="#{removeContactForm.retrieve}" update="@form"/>

如果有多个登录，它从 Web 服务中检索内容并将它们显示在页面上不会触发重定向。

<p:commandButton id="remove" value="#{msgs.BUTTON_REMOVE}"
action="/pages/confirm/confirmRemove.xhtml" ajax="false" process="@this"          
immediate="true" rendered="#{!empty removeContactManager and   
removeContactManager.contactRolesSuccessful}" />

但是，此按钮将（因为它重定向到另一个页面）

任何人都知道一种让 webapp 将这些 ajax 调用注册为事件的方法，而不会将所有基于 ajax 的内容都粘贴到新页面中吗？

4

1 回答 1

3

我使用了 Ben Simpson 编写的 JSFRedirectStrategy 在会话过期时使用会话管理过滤器重定向到会话过期 url。来源可以在这里找到。我认为同样可以在这里应用，但我们需要删除命名空间配置并添加一些像这样的 bean：

<http>
  <custom-filter position="CONCURRENT_SESSION_FILTER" ref="concurrencyFilter" />
  <custom-filter position="FORM_LOGIN_FILTER" ref="myAuthFilter" />
  <session-management session-authentication-strategy-ref="sas"/>
</http>

<beans:bean id="concurrencyFilter"
   class="org.springframework.security.web.session.ConcurrentSessionFilter">
  <beans:constructor-arg name="sessionRegistry" ref="sessionRegistry" />
  <beans:constructor-arg name="expiredUrl" value="/multipleLogins.xhtml" />
  <!-- this permits redirection to session timeout page from javascript/ajax or http -->
  <beans:property name="redirectStrategy" ref="jsfRedirectStrategy" />
</beans:bean>

<beans:bean id="myAuthFilter" class=
   "org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter">
  <beans:property name="sessionAuthenticationStrategy" ref="sas" />
  <beans:property name="authenticationManager" ref="authenticationManager" />
</beans:bean>

<beans:bean id="sas" class=
 "org.springframework.security.web.authentication.session.ConcurrentSessionControlStrategy">
  <beans:constructor-arg name="sessionRegistry" ref="sessionRegistry" />
  <beans:property name="maximumSessions" value="1" />
  <beans:property name="alwaysCreateSession" value="true" />
  <beans:property name="exceptionIfMaximumExceeded" value="true" />
</beans:bean>

<beans:bean id="jsfRedirectStrategy" class="com.examples.JsfRedirectStrategy"/>
<beans:bean id="sessionRegistry"
    class="org.springframework.security.core.session.SessionRegistryImpl" />

现在，您可以检查请求是否是 ajax 请求，然后在 JSFRedirectStrategy 类中发送这样的重定向： 这是从 ICEfaces 教程复制的代码。

/**
 * This class represents an extension to the way DefaultRedirectStrategy works.
 * This class takes into account if the incoming request causing action by Spring Security
 * requires a "partail-response" xml redirect instead of a response.sendRedirect().
 *
 * @author Ben Simpson ben.simpson@icesoft.com
 */
public class JsfRedirectStrategy implements RedirectStrategy {

    protected final Log logger = LogFactory.getLog(getClass());

    private boolean contextRelative;


    /**
     * Redirects the response to the supplied URL.
     * <p>
     * If <tt>contextRelative</tt> is set, the redirect value will be the value after the request context path. Note
     * that this will result in the loss of protocol information (HTTP or HTTPS), so will cause problems if a
     * redirect is being performed to change to HTTPS, for example.
     */
    public void sendRedirect(HttpServletRequest request, HttpServletResponse response, String url) throws IOException {
        String redirectUrl = calculateRedirectUrl(request.getContextPath(), url);
        redirectUrl = response.encodeRedirectURL(redirectUrl);

        if (logger.isDebugEnabled()) {
            logger.debug("Redirecting to '" + redirectUrl + "'");
        }

        //we should redirect using ajax response if the case warrants
        boolean ajaxRedirect = request.getHeader("faces-request") != null
                && request.getHeader("faces-request").toLowerCase().indexOf("ajax") > -1;

        if(ajaxRedirect) {
            //javax.faces.context.FacesContext ctxt = javax.faces.context.FacesContext.getCurrentInstance();
            //ctxt.getExternalContext().redirect(redirectUrl);

            String ajaxRedirectXml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" +
                "<partial-response><redirect url=\""+redirectUrl+"\"></redirect></partial-response>";
            response.setContentType("text/xml");
            response.getWriter().write(ajaxRedirectXml);
        } else {
            response.sendRedirect(redirectUrl);
        }


    }

    private String calculateRedirectUrl(String contextPath, String url) {
        if (!UrlUtils.isAbsoluteUrl(url)) {
            if (contextRelative) {
                return url;
            } else {
                return contextPath + url;
            }
        }

        // Full URL, including http(s)://

        if (!contextRelative) {
            return url;
        }

        // Calculate the relative URL from the fully qualified URL, minus the scheme and base context.
        url = url.substring(url.indexOf("://") + 3); // strip off scheme
        url = url.substring(url.indexOf(contextPath) + contextPath.length());

        if (url.length() > 1 && url.charAt(0) == '/') {
            url = url.substring(1);
        }

        return url;
    }

    /**
     * If <tt>true</tt>, causes any redirection URLs to be calculated minus the protocol
     * and context path (defaults to <tt>false</tt>).
     */
    public void setContextRelative(boolean useRelativeContext) {
        this.contextRelative = useRelativeContext;
    }
}
于 2012-08-23T14:04:03.837 回答