Dim e As RequestEventArgs = args(0)
Static UserTable As DataTable '定义一个变量,用于存储用户随机身份ID,以及最后一次活动时间.
Static ClearTime As Date
If UserTable Is Nothing Then '创建用于记录登录信息的临时表
ClearTime = Date.Now()
Dim dtb As New DataTableBuilder("UserInfos")
dtb.AddDef("UserName", Gettype(String), 255)
dtb.AddDef("UserID",Gettype(String),16)
dtb.AddDef("ActiveTime",Gettype(Date))
UserTable = dtb.Build(True)
End If
If (Date.Now - ClearTime).TotalMinutes >= 30 Then '清除超过30分钟没有操作的登录信息
UserTable.DeleteFor("ActiveTime < #" & Date.Now.AddMinutes(-30) & "#")
ClearTime = Date.Now()
End If
Dim wb As New weui
'身份验证
Dim UserName As String
Dim Password As String
Dim UserID As String
If e.Path = "logon.htm" '验证用户名和密码
If e.PostValues.ContainsKey("username") AndAlso e.PostValues.ContainsKey("password") Then
Dim Verified As Boolean '用于标记用户是否通过了身份验证
UserName = e.PostValues("username")
Password = e.PostValues("password")
Dim dr1 As DataRow '数据库对比用户代码
dr1 = DataTables("users").sqlFind("Name = '" & UserName & "'")
If dr1 IsNot Nothing AndAlso dr1("password").contains(password) Then
Verified = True
End If
If Verified Then
UserID = Rand.NextString(16) '生成随机用户ID
UserName = EncryptText(UserName,"123","123") '将用户名加密.
Dim dr As DataRow = UserTable.Find("UserName = '" & UserName & "'")
If dr IsNot Nothing Then '如果是重复登录,删除以前的登录信息
dr.Delete()
End If
dr = UserTable.AddNew()
dr("UserName") = UserName
dr("UserID") = UserId
dr("ActiveTime") = Date.Now '记录登录时间
wb.AppendCookie("username",UserName) '将用户名和密码写入cookie
wb.AppendCookie("userid",UserID)
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
End If
End If
Else '其它页面从Cookie提取登录信息进行验证
UserName = e.Cookies("username") '从cookie中获取用户名
UserID = e.Cookies("userid") '从cookie中获取 随机ID
Dim dr As DataRow = UserTable.Find("UserName = '" & UserName & "'")
If dr IsNot Nothing AndAlso dr("UserID") = UserID Then '如果通过验证,更新活动时候,继续访问其它页面.
dr("ActiveTime") = Date.Now '更新活动时间
Else '如果验证失败
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
End If
'开始生成网页
Select Case e.path
Case "logon.htm" '登录页面
wb.AddPageTitle("","pageheader","管理系统","")
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>") '然后直接跳转到登录页面
Case "", "default.htm" '首页
wb.AddPageTitle("","pageheader","管理系统","")
With wb.AddGrid("","g1")
.Add("c1","测试", "./images/png-1549.png").Attribute = ""
.Add("c2","暂未开通", "./images/png-1550.png").Attribute = ""
.Add("c3","暂未开通", "./images/png-1551.png").Attribute = ""
.Add("c4","暂未开通", "./images/png-1552.png").Attribute = ""
.Add("c5","暂未开通", "./images/png-1553.png").Attribute = ""
.Add("c6","暂未开通", "./images/png-1554.png").Attribute = ""
.Add("c7","暂未开通", "./images/png-1555.png"). Attribute = ""
.Add("c8","暂未开通", "./images/png-1556.png").Attribute = ""
.Add("c12","退出", "./images/png-0670.png", "exit.htm") '退出登录
End With
End Select
e.WriteString(wb.Build) '生成网页
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Post By：2021/5/31 17:10:00 [显示全部帖子]
