主题：[求助]DeleteCookie 删除后还可以通过网页的后退按钮返回登录的状态

老师，
   帮助文档，操作过程中，发现退出理论是清除cookie中原来的用户名和密码，需要重新登录

        wb.DeleteCookie("username") '清除cookie中原来的用户名和密码
        wb.DeleteCookie("password")
        wb.InsertHTML("<meta http-equiv='Refresh' c>") '那么直接跳转到登录页面
为何还可以通过网页的前进后退按钮返回已经登录的状态（不用输入密码）？

 老师，
   为何 这样不行呢？
 Case "", "default.htm" '首页
        '重新验证开始
        If e.PostValues.ContainsKey("username") AndAlso e.PostValues.ContainsKey("password")  Then
            UserName = e.PostValues("username")
            Password = e.PostValues("password")
        End If
        If UserName="" OrElse Password="" Then '如果用户身份验证失败,应返回到登录页面
            wb.InsertHTML("<meta http-equiv='Refresh' c>") '那么直接跳转到登录页面
            e.WriteString(wb.Build) '生成网页
            Return '必须的
        End If
        '重新验证结束
        wb.AddPageTitle("","pageheader","")
        With wb.AddGrid("","g1")
            With .Add("c1","增加订单", "./images/button.png")
                .Attribute = ""
            End With

 理论上 上次退出了 UserName Password 已经为空了 ，如果进入default.htm ，没有信息，应该跳转到登陆界面

老师 ，
是否是这个情况
虽然服务器端删除了Cookie，但是浏览器按钮的后退，缓存的是浏览器的端的Cookie对应的界面？

 老师，
按照3楼 代码怎么加？

我已经建立了一个文本文件cookieremovhistory
内容
 //防止页面后退
        history.pushState(null, null, document.URL);
        window.addEventListener('popstate', function () {
            history.pushState(null, null, document.URL);
        });

服务器端，代码填写在哪里，如何引入js文件代码？


'通用事件头,用于发送已经存在的常见文件
Dim fl As String = "G:\移动开发\网页结构和表结构的关联\" & e.path
If filesys.FileExists(fl)
    Dim idx As Integer = fl.LastIndexOf(".")
    Dim ext As String  = fl.SubString(idx)
    Select Case ext
        Case ".jpg",".gif",".png",".bmp",".wmf",".js",".css" ,".html",".htm",".zip",".rar"
            e.WriteFile(fl)
            Return '这里必须返回
    End Select
End If
Dim wb As New weui
'身份验证
Dim Verified As Boolean '用于标记用户是否通过了身份验证
Dim UserName As String = e.Cookies("username") '从cookie中获取用户名
Dim Password As String = e.Cookies("password") '从cookie中获取用户密码
If e.Path = "logon.htm" '如果是通过登录页面访问,从PostValues即可中提取用户名和密码
    If e.PostValues.ContainsKey("username") AndAlso e.PostValues.ContainsKey("password")  Then
        UserName = e.PostValues("username")
        Password = e.PostValues("password")
    End If
End If
If UserName = "张三" AndAlso Password = "888" Then  '实际使用的时候,请改为从数据库读取用户名和密码进行比较
    Verified  = True
ElseIf Username = "李四" AndAlso Password="999" Then
    Verified  = True
End If
If Verified AndAlso e.Path = "logon.htm"  Then '如果用户访问的是登录页,且身份验证成功
    wb.AppendCookie("username",UserName) '将用户名和密码写入cookie
    wb.AppendCookie("password",Password)
    wb.InsertHTML("<meta http-equiv='Refresh' c>") '直接跳转到首页
    e.WriteString(wb.Build) '生成网页
    Return '必须的
ElseIf Verified = False AndAlso e.Path <> "logon.htm" Then '如果用户身份验证失败,且访问的不是登录页面
    wb.InsertHTML("<meta http-equiv='Refresh' c>") '那么直接跳转到登录页面
    e.WriteString(wb.Build) '生成网页
        Return '必须的
End If
'开始生成网页
Select Case e.path
    Case "logon.htm" '登录页面
        wb.AddPageTitle("","pageheader","销售系统","")
        If e.PostValues.ContainsKey("username") AndAlso e.PostValues.ContainsKey("password")  Then '判断是否是验证失败后的重新登录
            wb.AddTopTips("","toptip1","用户名或密码错误!").msec = 2000 '如果用户通过登录按钮访问,则给用户一个2秒的提示.
        End If
        wb.AddForm("","form1","logon.htm")
        With wb.AddInputGroup("form1","ipg1")
            .AddInput("username","户名","text")
            .AddInput("password","密码","password")
        End With
        With wb.AddButtonGroup("form1","btg1",True)
            .Add("btn1", "登录", "submit")
        End With
    Case "exit.htm" '退出登录
        wb.DeleteCookie("username") '清除cookie中原来的用户名和密码
        wb.DeleteCookie("password")
        wb.InsertHTML("<meta http-equiv='Refresh' c>") '那么直接跳转到登录页面
    Case "", "default.htm" '首页
                wb.AddPageTitle("","pageheader","")
        With wb.AddGrid("","g1")
            With .Add("c1","增加订单", "./images/button.png")
                .Attribute = ""
            End With
                  End With
End Select
e.WriteString(wb.Build) '生成网页

老师 是这样吗?


 '通用事件头,用于发送已经存在的常见文件
Dim fl As String = "G:\移动开发\网页结构和表结构的关联\" & e.path
If filesys.FileExists(fl)
    Dim idx As Integer = fl.LastIndexOf(".")
    Dim ext As String  = fl.SubString(idx)
    Select Case ext
        Case ".jpg",".gif",".png",".bmp",".wmf",".js",".css" ,".html",".htm",".zip",".rar"
            e.WriteFile(fl)
            Return '这里必须返回
    End Select
End If
Dim wb As New weui
'身份验证
Dim Verified As Boolean '用于标记用户是否通过了身份验证
Dim UserName As String = e.Cookies("username") '从cookie中获取用户名
Dim Password As String = e.Cookies("password") '从cookie中获取用户密码
If e.Path = "logon.htm" '如果是通过登录页面访问,从PostValues即可中提取用户名和密码
    If e.PostValues.ContainsKey("username") AndAlso e.PostValues.ContainsKey("password")  Then
        UserName = e.PostValues("username")
        Password = e.PostValues("password")
    End If
End If
If UserName = "张三" AndAlso Password = "888" Then  '实际使用的时候,请改为从数据库读取用户名和密码进行比较
    Verified  = True
ElseIf Username = "李四" AndAlso Password="999" Then
    Verified  = True
End If
If Verified AndAlso e.Path = "logon.htm"  Then '如果用户访问的是登录页,且身份验证成功
    wb.AppendCookie("username",UserName) '将用户名和密码写入cookie
    wb.AppendCookie("password",Password)
    wb.InsertHTML("<meta http-equiv='Refresh' c>") '直接跳转到首页
    e.WriteString(wb.Build) '生成网页
    Return '必须的
ElseIf Verified = False AndAlso e.Path <> "logon.htm" Then '如果用户身份验证失败,且访问的不是登录页面
    wb.InsertHTML("<meta http-equiv='Refresh' c>") '那么直接跳转到登录页面
    e.WriteString(wb.Build) '生成网页
    Return '必须的
End If
'开始生成网页
Select Case e.path
    Case "logon.htm" '登录页面
        wb.AddPageTitle("","pageheader","销售系统","")
        If e.PostValues.ContainsKey("username") AndAlso e.PostValues.ContainsKey("password")  Then '判断是否是验证失败后的重新登录
            wb.AddTopTips("","toptip1","用户名或密码错误!").msec = 2000 '如果用户通过登录按钮访问,则给用户一个2秒的提示.
        End If
        wb.AddForm("","form1","logon.htm")
        With wb.AddInputGroup("form1","ipg1")
            .AddInput("username","户名","text")
            .AddInput("password","密码","password")
        End With
        With wb.AddButtonGroup("form1","btg1",True)
            .Add("btn1", "登录", "submit")
        End With
    Case "exit.htm" '退出登录
        wb.DeleteCookie("username") '清除cookie中原来的用户名和密码
        wb.DeleteCookie("password")
        wb.InsertHTML("<meta http-equiv='Refresh' c>") '那么直接跳转到登录页面
    Case "", "default.htm" '首页
        wb.AddPageTitle("","pageheader","")
        With wb.AddGrid("","g1")
            With .Add("c1","增加订单", "./images/button.png")
                .Attribute = ""
            End With
        End With
End Select
wb.AppendHTML("<script src='./lib/cookieremovhistory.js'></script>") '引入脚本文件
e.WriteString(wb.Build) '生成网页

cookieremovhistory.js 文件路径是

G:\移动开发\网页结构和表结构的关联\weui\lib

测试 不成功 仍然可以 后退 ；
放在哪都不行 ，是不是狐爸的WEUI里面修改下就可以了

老师，

劳烦您给看看，就是不行，位置都放到哪都不行。

 

下载信息  [文件大小：   下载次数： ]

点击浏览该文件:管理项目18.rar

 

'通用事件头,用于发送已经存在的常见文件
Dim fl As String = "G:\移动开发\网页结构和表结构的关联\" & e.path
If filesys.FileExists(fl)
    Dim idx As Integer = fl.LastIndexOf(".")
    Dim ext As String  = fl.SubString(idx)
    Select Case ext
        Case ".jpg",".gif",".png",".bmp",".wmf",".js",".css" ,".html",".htm",".zip",".rar"
            e.WriteFile(fl)
            Return '这里必须返回
    End Select
End If
Dim wb As New weui
    wb.AppendHTML("<script src='./lib/cookieremovhistory.js'></script>") '引入脚本文件
'身份验证
Dim Verified As Boolean '用于标记用户是否通过了身份验证
Dim UserName As String = e.Cookies("username") '从cookie中获取用户名
Dim Password As String = e.Cookies("password") '从cookie中获取用户密码
If e.Path = "logon.htm" '如果是通过登录页面访问,从PostValues即可中提取用户名和密码
    wb.AppendHTML("<script src='./lib/cookieremovhistory.js'></script>") '引入脚本文件
    If e.PostValues.ContainsKey("username") AndAlso e.PostValues.ContainsKey("password")  Then
        UserName = e.PostValues("username")
        Password = e.PostValues("password")
    End If
End If
If UserName = "张三" AndAlso Password = "888" Then  '实际使用的时候,请改为从数据库读取用户名和密码进行比较
    Verified  = True
ElseIf Username = "李四" AndAlso Password="999" Then
    Verified  = True
End If
If Verified AndAlso e.Path = "logon.htm"  Then '如果用户访问的是登录页,且身份验证成功
    wb.AppendCookie("username",UserName) '将用户名和密码写入cookie
    wb.AppendCookie("password",Password)
    wb.InsertHTML("<meta http-equiv='Refresh' c>") '直接跳转到首页
    wb.AppendHTML("<script src='./lib/cookieremovhistory.js'></script>") '引入脚本文件
    e.WriteString(wb.Build) '生成网页
    Return '必须的
ElseIf Verified = False AndAlso e.Path <> "logon.htm" Then '如果用户身份验证失败,且访问的不是登录页面
    wb.InsertHTML("<meta http-equiv='Refresh' c>") '那么直接跳转到登录页面
    wb.AppendHTML("<script src='./lib/cookieremovhistory.js'></script>") '引入脚本文件
    e.WriteString(wb.Build) '生成网页
    Return '必须的
End If

'开始生成网页
Select Case e.path
    Case "logon.htm" '登录页面
        wb.AppendHTML("<script src='./lib/cookieremovhistory.js'></script>") '引入脚本文件
        wb.AddPageTitle("","pageheader","销售系统","")
        If e.PostValues.ContainsKey("username") AndAlso e.PostValues.ContainsKey("password")  Then '判断是否是验证失败后的重新登录
            wb.AddTopTips("","toptip1","用户名或密码错误!").msec = 2000 '如果用户通过登录按钮访问,则给用户一个2秒的提示.
        End If
        wb.AddForm("","form1","logon.htm")
        With wb.AddInputGroup("form1","ipg1")
            .AddInput("username","户名","text")
            .AddInput("password","密码","password")
        End With
        With wb.AddButtonGroup("form1","btg1",True)
            .Add("btn1", "登录", "submit")
        End With
    Case "exit.htm" '退出登录
        wb.DeleteCookie("username") '清除cookie中原来的用户名和密码
        wb.DeleteCookie("password")
wb.AppendHTML("<script src='./lib/cookieremovhistory.js'></script>") '引入脚本文件
        wb.InsertHTML("<meta http-equiv='Refresh' c>") '那么直接跳转到登录页面
        wb.AppendHTML("<script src='./lib/cookieremovhistory.js'></script>") '引入脚本文件
    Case "", "default.htm" '首页
        wb.AddPageTitle("","pageheader","")
        With wb.AddGrid("","g1")
            With .Add("c1","增加订单", "./images/button.png")
                .Attribute = ""
            End With
            .Add("c12","退出", "./images/exit.png", "exit.htm") '退出登录
 wb.AppendHTML("<script src='./lib/cookieremovhistory.js'></script>") '引入脚本文件          
        End With
End Select
e.WriteString(wb.Build) '生成网页

 我用的是火狐浏览器，也不是手机。