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[英]ViewExpiredException for JSF/Primefaces Ajax Request after Spring RememberMe Authentification
[英]Session timeout and ViewExpiredException handling on JSF/PrimeFaces ajax request
我发现这篇文章对非 ajax 请求很有用如何在 JSF 2 中处理会话过期和 ViewExpiredException? 但是当我使用 AJAX 调用提交时,我无法使用它。
假设在一个primefaces 对话框中,我正在使用AJAX 发出一个post 请求并且会话已经超时。 我看到我的页面卡住了。
如何解决这种情况,以便当我使用 AJAX 发帖时,我可以将他重定向到我的查看过期页面,然后将他转发到类似于上面链接中的解决方案的登录页面?
JSF2/Primefaces/Glassfish
默认情况下,ajax 请求期间抛出的异常在客户端完全没有反馈。 只有当您在项目阶段设置为Development
并使用<f:ajax>
运行 Mojarra 时,您才会收到带有异常类型和消息的纯 JavaScript 警报。 但除此之外,在 PrimeFaces 中,默认情况下根本没有反馈。 但是,您可以在服务器日志和 ajax 响应(在 webbrowser 的开发人员工具集的“网络”部分)中看到异常。
您需要实现一个自定义的ExceptionHandler
,当队列中有ViewExpiredException
时,它基本上完成以下工作:
String errorPageLocation = "/WEB-INF/errorpages/expired.xhtml";
context.setViewRoot(context.getApplication().getViewHandler().createView(context, errorPageLocation));
context.getPartialViewContext().setRenderAll(true);
context.renderResponse();
或者,您可以使用 JSF 实用程序库OmniFaces 。 它有一个FullAjaxExceptionHandler
正是为了这个目的(源代码在这里,展示演示在这里)。
@BalusC 的答案和这篇文章的合并,我解决了我的问题!
我的 ExceptionHandlerWrapper:
public class CustomExceptionHandler extends ExceptionHandlerWrapper {
private ExceptionHandler wrapped;
CustomExceptionHandler(ExceptionHandler exception) {
this.wrapped = exception;
}
@Override
public ExceptionHandler getWrapped() {
return wrapped;
}
@Override
public void handle() throws FacesException {
final Iterator<ExceptionQueuedEvent> i = getUnhandledExceptionQueuedEvents().iterator();
while (i.hasNext()) {
ExceptionQueuedEvent event = i.next();
ExceptionQueuedEventContext context
= (ExceptionQueuedEventContext) event.getSource();
// get the exception from context
Throwable t = context.getException();
final FacesContext fc = FacesContext.getCurrentInstance();
final Map<String, Object> requestMap = fc.getExternalContext().getRequestMap();
final NavigationHandler nav = fc.getApplication().getNavigationHandler();
//here you do what ever you want with exception
try {
//log error ?
//log.log(Level.SEVERE, "Critical Exception!", t);
if (t instanceof ViewExpiredException) {
requestMap.put("javax.servlet.error.message", "Session expired, try again!");
String errorPageLocation = "/erro.xhtml";
fc.setViewRoot(fc.getApplication().getViewHandler().createView(fc, errorPageLocation));
fc.getPartialViewContext().setRenderAll(true);
fc.renderResponse();
} else {
//redirect error page
requestMap.put("javax.servlet.error.message", t.getMessage());
nav.handleNavigation(fc, null, "/erro.xhtml");
}
fc.renderResponse();
// remove the comment below if you want to report the error in a jsf error message
//JsfUtil.addErrorMessage(t.getMessage());
} finally {
//remove it from queue
i.remove();
}
}
//parent hanle
getWrapped().handle();
}
}
我的 ExceptionHandlerFactory:
public class CustomExceptionHandlerFactory extends ExceptionHandlerFactory {
private ExceptionHandlerFactory parent;
// this injection handles jsf
public CustomExceptionHandlerFactory(ExceptionHandlerFactory parent) {
this.parent = parent;
}
@Override
public ExceptionHandler getExceptionHandler() {
ExceptionHandler handler = new CustomExceptionHandler(parent.getExceptionHandler());
return handler;
}
}
我的faces-config.xml
<?xml version='1.0' encoding='UTF-8'?>
<faces-config version="2.2"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-facesconfig_2_2.xsd">
<factory>
<exception-handler-factory>
your.package.here.CustomExceptionHandlerFactory
</exception-handler-factory>
</factory>
</faces-config>
我在 JBoss 7 的生产模式下使用 Mojarra 2.1.7。会话到期后,AJAX 调用返回错误 XML 文档。 您可以使用 f:ajax 的常用 onerror 处理程序轻松捕获此错误。
<script type="text/javascript">
function showError(data) {
alert("An error happened");
console.log(data);
}
</script>
<h:commandLink action="...">
<f:ajax execute="..." render="..." onerror="showError"/>
</h:commandLink>
我已经将它包含在我的 ViewExpiredExceptionHandler 类中,它在 WAS 中对我来说很好用
public void handle() throws FacesException {
FacesContext facesContext = FacesContext.getCurrentInstance();
for (Iterator<ExceptionQueuedEvent> iter = getUnhandledExceptionQueuedEvents()
.iterator(); iter.hasNext();) {
Throwable exception = iter.next().getContext().getException();
if (exception instanceof ViewExpiredException) {
final ExternalContext externalContext = facesContext
.getExternalContext();
try {
facesContext.setViewRoot(facesContext.getApplication()
.getViewHandler()
.createView(facesContext, "/Login.xhtml")); //Login.xhtml is the page to to be viewed. Better not to give /WEB-INF/Login.xhtml
externalContext.redirect("ibm_security_logout?logoutExitPage=/Login.xhtml"); // when browser back button is pressed after session timeout, I used this.
facesContext.getPartialViewContext().setRenderAll(true);
facesContext.renderResponse();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
iter.remove();
}
}
}
getWrapped().handle();
}
希望这可以帮助
我遇到了这个问题,需要在会话超时后用户执行任何操作时显示确认弹出窗口,我建议的解决方案是:
<security:http use-expressions="true" auto-config="true" entry-point-ref="authenticationEntryPoint">
<security:intercept-url pattern="/common/auth/**" access="permitAll" />
<security:intercept-url pattern="/javax.faces.resource/**" access="permitAll" />
<security:intercept-url pattern="/**/ *.*" access="hasRole('ROLE_ADMIN')" />
<security:form-login login-page="/common/auth/login.jsf" />
<!-- <security:remember-me key="secret" services-ref="rememberMeServices" /> -->
<security:logout invalidate-session="true" logout-success-url="/common/auth/login.jsf" />
</security:http>
<bean id="authenticationEntryPoint" class="com.x.y.MyRedirectEntryPoint" >
<property name="loginFormUrl" value="/common/auth/login.jsf"/>
</bean>
MyRedirectEntryPoint 应扩展 AuthenticationProcessingFilterEntryPoint 并覆盖开始方法
public void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException authException)
throws IOException, ServletException {
boolean ajaxRedirect = request.getHeader("faces-request") != null
&& request.getHeader("faces-request").toLowerCase().indexOf("ajax") > -1;
if (ajaxRedirect) {
Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
if (authentication == null) {
response.sendError(403);
}
} else {
super.commence(request, response, authException);
}
}
现在您可以简单地绑定一个回调 javascript 函数来捕获抛出的 403 错误并执行您想要的任何操作:
$(document).bind('ajaxError',
function(event, request, settings, exception){
if (request.status==403){
//do whatever you wanted may be show a popup or just redirect
window.location = '#{request.contextPath}/';
}
});
对我来说,一个简单的客户端 javascript 处理程序起作用了:
function handleAjaxExpired(xhr,status,args) {
// handler for "oncomplete" ajax callback
if ( xhr.responseXML.getElementsByTagName('error-name').length ) {
// "<error-name>" tag is present -> check for "view expired" exception
html = xhr.responseXML.getElementsByTagName('error-name')[0].innerHTML;
if ( html.indexOf('ViewExpiredException') > -1 ) {
// view expired exception thrown
// do something / reload page
if ( confirm('session expired -> reload page?') ) {
document.location.href=document.location.href;
}
}
}
}
这个处理程序是从触发 UI 元素中的“oncomplete”属性调用的,例如在这里从 Primefaces 数据表中的 rowSelect 事件调用:
<p:ajax event="rowSelect" oncomplete="handleAjaxExpired(xhr,status,args)" />
更新:为了避免向每个启用 ajax 的元素添加“oncomplete”属性,此 javascript 代码在所有 ajax 响应中全局搜索错误:
(function() {
// intercept all ajax requests
var origXHROpen = XMLHttpRequest.prototype.open;
XMLHttpRequest.prototype.open = function() {
this.addEventListener('load', function() {
handleAjaxExpired(this);
});
origXHROpen.apply(this, arguments);
};
})();
此代码使 PrimeFaces UI 元素中的“oncomplete”属性过时。
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