在Struts应用中,我们发出的请求都会经过 相应的拦截器进行相关处理,一般都会有一个用户登录拦截(Session失效拦截);一般请求的话,如果Session失效时,我们会跳到登录页面,可是如果我们采用AJAX请求时,将会返回登录页面的HTML代码,这肯定不是我们想要的,那么我们如何解决呢?请看以下步骤:
一、建立拦截器
packagecom.xxx.planeap.interceptor; importjavax.servlet.http.HttpServletRequest; importjavax.servlet.http.HttpServletResponse; importorg.apache.log4j.Logger; importorg.apache.struts2.ServletActionContext; importcom.opensymphony.xwork2.ActionContext; importcom.opensymphony.xwork2.ActionInvocation; importcom.opensymphony.xwork2.ActionSupport; importcom.opensymphony.xwork2.interceptor.AbstractInterceptor; importcom.xxx.common.contants.ConstantsKey; importcom.xxx.common.contants.SessionKey; importcom.xxx.planeap.domain.User; importcom.xxx.planeap.security.SecurityContextUtil; /** * *@authorGomaOMA1989@YEAH.NET *@versionv1.0 *@since2012-05-31 * */ publicclassSecurityInterceptorextendsAbstractInterceptor{ privatestaticfinallongserialVersionUID=1L; privateLoggerlogger=Logger.getLogger(SecurityInterceptor.class); @Override publicStringintercept(ActionInvocationinvocation)throwsException{ //TODOAuto-generatedmethodstub StringclassName=invocation.getAction().getClass().getName(); Stringaction=className.substring(className.lastIndexOf(".")+1,className.length()); StringactionName=invocation.getProxy().getActionName(); Stringresult; HttpServletRequestrequest=ServletActionContext.getRequest(); HttpServletResponseresponse=ServletActionContext.getResponse(); Stringtype=request.getHeader("X-Requested-With"); Useruser=(User)ActionContext.getContext().getSession().get(SessionKey.CURRENT_USER); if(user==null){ logger.debug("SECURITYCHECKED:NEEDTOLOGIN"); if("XMLHttpRequest".equalsIgnoreCase(type)){//AJAXREQUESTPROCESS response.setHeader("sessionstatus",ConstantsKey.MSG_TIME_OUT); result=null; }else{//NORMALREQUESTPROCESS result=ActionSupport.LOGIN; } }else{ logger.debug("SECURITYCHECKED:USERHASLOGINED"); SecurityContextUtil.setCurrentUser(user); booleanhanPerm=SecurityContextUtil.hasPerm(action,actionName); logger.debug("SECURITYCHECKED:PERMISSION---"+action+"."+actionName+"="+hanPerm); result=invocation.invoke(); } returnresult; } }
//全局的AJAX访问,处理AJAX清求时SESSION超时
$.ajaxSetup({
contentType:"application/x-www-form-urlencoded;charset=utf-8",
complete:function(XMLHttpRequest,textStatus){
//通过XMLHttpRequest取得响应头,sessionstatus
var sessionstatus=XMLHttpRequest.getResponseHeader("sessionstatus");
if(sessionstatus=="timeout"){
window.location.replace(PlanEap.getActionURI("login"));
}
}
});
原文链接:https://www.f2er.com/ajax/162602.html