webix+springmvc session timeout jumps to login page-JS Tutorial-php.cn

webix+springmvc session timeout jumps to login page

高洛峰

Release： 2017-01-07 09:32:14

Original

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Introduction

Recently working on a project, I found that ajax requests cannot be redirected directly to the login page in the server. After checking some information, I found that someone has given a method for jquery's ajax request. But there are some differences between webix's ajax request and jquery's. This imitates jquery's processing method to implement webix's ajax request session timeout jump.

Specific approach:

1. Check the webix.js source code and find that webix.ajax only has the pre-request listening function "onBeforeAjax". To obtain the return status and jump to the login page, it must be A returned listening function, but the source code does not. So I modified the source code and added a returned listening function "onAfterAjax".

The red marked part is the code I added. When it detects that ajax is completed, "onAfterAjax" is automatically executed. (The location of the code can be searched for webix.js, the condition is "onBeforeAjax", and then just add the red code at the corresponding location

if (webix.callEvent("onBeforeAjax", [s, t, e, a, o, null, r])) {
var h = !1;
if ("GET" !== s) {
var l = !1;
for (var c in o)"content-type" == c.toString().toLowerCase() && (l = !0, "application/json" == o[c] && (h = !0));
l || (o["Content-Type"] = "application/x-www-form-urlencoded")
}
if ("object" == typeof e)if (h)e = this.stringify(e); else {
var u = [];
for (var d in e) {
var f = e[d];
(null === f || f === webix.undefined) && (f = ""), "object" == typeof f && (f = this.stringify(f)), u.push(d + "=" + encodeURIComponent(f))
}
e = u.join("&")
}
e && "GET" === s && (t = t + (-1 != t.indexOf("?") ? "&" : "?") + e,
e = null), a.open(s, t, !this.H);
var b = this.Tw;
b && (a.responseType = b);
for (var c in o)a.setRequestHeader(c, o[c]);
var x = this;
return this.master = this.master || n, a.onreadystatechange = function () {
if (!a.readyState || 4 == a.readyState) {
if (webix.callEvent("onAfterAjax", [a]) === !1) {
return false;
};
if (webix.ajax.count++, i && x && !a.aborted) {
if (-1 != webix.ly.find(a))return webix.ly.remove(a);
var t, e, s = x.master || x, r = a.status >= 400 || 0 === a.status;
"blob" == a.responseType || "arraybuffer" == a.responseType ? (t = "", e = a.response) : (t = a.responseText || "", e = x.J(a)), webix.ajax.$callback(s, i, t, e, a, r)
}
x && (x.master = null), i = x = n = null
}
}, this.qh && (a.timeout = this.qh), this.H ? a.send(e || null) : setTimeout(function () {
a.aborted || (-1 != webix.ly.find(a) ? webix.ly.remove(a) : a.send(e || null));
}, 1), this.master && this.master.Ve && this.master.Ve.push(a), this.H ? a : r
}

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2. The webix.ajx request has no obvious sign, and the logo of jquery.ajax is x- requested-with, so I simulated giving a logo requestFlag="webix" (you can set your own preference), and set it with "onBeforeAjax"

webix.attachEvent("onBeforeAjax",function(s, t, e, a, o){o["requestFlag"]="webix"})

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3 , Monitoring return status

webix.attachEvent("onAfterAjax",function(xhr){if(xhr.getResponseHeader("sessionstatus")==&#39;timeout&#39;){window.location.href=&#39;/webix/login.html&#39;}});

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4. Background code

4.1 Interceptor code

package com.ljx.filter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
public class UserInterceptor implements HandlerInterceptor {
@Override
public void afterCompletion(HttpServletRequest arg0,
HttpServletResponse arg1, Object arg2, Exception arg3)
throws Exception {
}
@Override
public void postHandle(HttpServletRequest arg0,
HttpServletResponse response, Object arg2, ModelAndView arg3)
throws Exception {
response.sendRedirect("/webix/login.html");
}
@Override
public boolean preHandle(HttpServletRequest request,
HttpServletResponse response, Object handler) throws Exception {
Object obj = request.getSession().getAttribute("LOGIN");
if (null == obj) { // 未登录
if (request.getHeader("requestFlag") != null
&& request.getHeader("requestFlag").equalsIgnoreCase(
"webix")) { // 如果是ajax请求响应头会有，requestFlag
response.setHeader("sessionstatus", "timeout");// 在响应头设置session状态
} else {
response.sendRedirect(request.getContextPath() + "/login");
}
return false;
}
return true;
}
}

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4.2 Add the interceptor configuration to the spring configuration file

<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/mvc/*" />
<bean class="com.ljx.filter.UserInterceptor"></bean>
</mvc:interceptor>
</mvc:interceptors>

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4.3 Check the effect of webix.ajax under F12 console execution

webix.ajax().get("/webix/mvc/login.action")

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The above is the webix+springmvc session timeout jump login page introduced by the editor. I hope it will be helpful to everyone. If you have any questions, please leave me a message. , the editor will reply to everyone in time.

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