ExtJs Session过期

最新推荐文章于 2015-11-27 15:37:58 发布

原创最新推荐文章于 2015-11-27 15:37:58 发布 · 209 阅读

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本文详细介绍了如何使用Ext.js框架实现Ajax请求，并在登录验证失败或超时时进行特定处理，包括设置登录错误提示和重定向到登录页面。

参考：http://lym6520.iteye.com/blog/871092

1.Ext增加如下代码

Ext.Ajax.defaultHeaders = {  
        'Request-By': 'Ext' // 标识ajax请求
    };
	Ext.Ajax.on('requestcomplete',function(conn,response,options){  
        var json = Ext.decode(response.responseText);  
        if(typeof json == 'object'   
            && !json.success   
            && json.timeout){
            alert('<fmt:message key="msgBox.loginerror.timeout"/>');  
            window.location.href = 'login.jsp';                              
        }
    });

2.Filter代码：

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

		List<String> list = new ArrayList<String>();
		list.add(loginUrl);
		list.add("/login");

		HttpServletRequest httpServletRequest = (HttpServletRequest) request;
		HttpServletResponse servletResponse = (HttpServletResponse) response;

		String path = httpServletRequest.getServletPath();
		User user = (User) httpServletRequest.getSession().getAttribute("user");
		if (!list.contains(path) && user == null) {
			String ext = httpServletRequest.getHeader("Request-By");
			if (ext != null && ext.equalsIgnoreCase("Ext")) {
				servletResponse.addHeader("sessionstatus", "timeout");
				PrintWriter out = servletResponse.getWriter();
				out.print("{success:false,timeout:true}");
				out.flush();
				out.close();
			} else {
				servletResponse.sendRedirect(httpServletRequest.getContextPath() + loginUrl);
			}
		}
		chain.doFilter(request, response);
	}

3.也可以直接判断是否为Ajax提交

String head = httpRequest.getHeader("x-requested-with");
if (head != null && !(head.equalsIgnoreCase("XMLHttpRequest"))) {  
//Ajax提交
}