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), 16)
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 sb As New StringBuilder
'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 cmd As New SQLCommand
Dim dt0 As DataTable
Dim dr0 As DataRow
cmd.C
cmd.CommandText = "Select * Fro m {Users} "
dt0 = cmd.ExecuteReader
dr0 = dt0.Find("name ='" & UserName & "'")
msgbox(dr0 Is Nothing)
msgbox(username & " | " & password)
If dr0 IsNot Nothing Then
msgbox(username & " | " & password & " | " & dr0("password"))
End If
If dr0 IsNot Nothing AndAlso Password = dr0("password") Then
Verified = True
End If
If Verified Then
UserID = Rand.NextString(16) '生成随机用户ID
MessageBox.Show(username) '这里弹出什么内容
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
e.Appendcookie("username",UserName) '将用户名和密码写入cookie
e.Appendcookie("password",Password)
MessageBox.Show(username) '这里弹出什么内容
e.WriteString("<meta http-equiv='Refresh' c>") '直接跳转到首页
MessageBox.Show(3)
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
MessageBox.Show(4)
e.WriteString("<meta http-equiv='Refresh' c>") '那么直接跳转到登录页面
Return "" '必须的
End If
End If'开始生成网页
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Post By：2017/10/23 22:48:00 [只看该作者]
