This article mainly introduces the example code of rewriting ajax to implement session timeout to jump to the login page. Friends who need it can refer to the following
Question: When using window.location.href to jump to the page, The backend only needs to implement a filter to redirect to the login page if the session times out. But what about using ajax? Using ajax to execute will result in a 302 error and it is impossible to jump to the page. Below I will post my front-end and back-end code to address this issue.
1. Session filter
import java.io.IOException;
0 || requestUri.indexOf("/system/login") > 0) { return ; }
Copy after login
2. Add configuration to web.xml:
sessionFilter com.manager.filter.SessionFilter sessionFilter /manager/*
*3 , Rewrite ajax
Note: This code is placed on the index page
jQuery(function($){ var _ajax=$.ajax; $.ajax=function(opt){ var _success = opt && opt.success || function(a, b){}; var _opt = $.extend(opt, { success:function(data, textStatus){ _success(data, textStatus); }, error:function(XMLHttpRequest, textStatus, errorThrown){ //alert(XMLHttpRequest.responseText); //如果请求发生错误,会返回登陆页面源代码,如果源代码里面存在lovnx这个字符串,前端就重定向到登陆页面 var reData = XMLHttpRequest.responseText + ""; if(reData.indexOf('lovnx') != -1) { window.location.href="/manager/login.html" rel="external nofollow" ; return; } } }); return _ajax(_opt); }; });
4. Add code to the login page
The above is I compiled it for everyone, I hope it will be helpful to everyone in the future.
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