Imports System
Imports System.Text
Imports System.Net
Public Class email
    Inherits System.Web.UI.Page

#Region " Web Form Designer Generated Code "

    'This call is required by the Web Form Designer.
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()

    End Sub

    'NOTE: The following placeholder declaration is required by the Web Form Designer.
    'Do not delete or move it.
    Private designerPlaceholderDeclaration As System.Object

    Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
        'CODEGEN: This method call is required by the Web Form Designer
        'Do not modify it using the code editor.
        InitializeComponent()
    End Sub

#End Region
    Private tcpC As New Sockets.TcpClient
    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        ReadMail("mail.calorisplanitia.com", "abc@calorisplanitia.com", "password")
    End Sub

    ' send command strings and return the response
    Function SendCommand(ByRef netstream As System.Net.Sockets.NetworkStream, ByVal sToSend As String)
        Dim bData() As Byte = Encoding.ASCII.GetBytes(sToSend.ToCharArray)
        netstream.Write(bData, 0, bData.Length())
        Return GetResponse(netstream)
    End Function

    ' check if there is a response to get and return it
    Function GetResponse(ByRef netstream As System.Net.Sockets.NetworkStream)
        Dim bytes(tcpC.ReceiveBufferSize) As Byte
        Dim ret As Integer = netstream.Read(bytes, 0, bytes.Length)
        ' Returns the data received
        Dim returndata As String = Encoding.ASCII.GetString(bytes)
        Return returndata
    End Function
    Function ReadMail(ByVal host As String, ByVal user As String, ByVal pass As String)
        ' initialise objects
        Dim netstream As System.Net.Sockets.NetworkStream
        Dim thisResponse As String
        ' open connection to server
        Try
            tcpC.Connect(host, 110)
        Catch ex As Exception
            Response.Write("Error connecting to host: " & ex.Message & " - Please check your details and try again")
            Response.End()
        End Try
        ' get response
        netstream = tcpC.GetStream()
        thisResponse = GetResponse(netstream)
        ' enter user name
        thisResponse = SendCommand(netstream, "user " & user & vbCrLf)
        ' enter password
        thisResponse = SendCommand(netstream, "pass " & pass & vbCrLf)
        ' check if logged in ok
        If Not Left(thisResponse, 4) = "-ERR" Then
            Response.Write("Logged in OK <BR>")
        Else
            Response.Write("Error logging in, check your user details and try again<BR>")
            Response.Write("<P>" & thisResponse & "</p>")
            Response.End()
        End If
        thisResponse = SendCommand(netstream, "stat" & vbCrLf)
        Dim tmpArray() As String
        tmpArray = Split(thisResponse, " ")
        Dim thisMess As Integer
        Dim numMess As String = tmpArray(1)
        Response.Write("")
        thisResponse = ""
        If CInt(numMess) > 0 Then
            Response.Write("Messages: " & numMess & "<br>")
            For thisMess = 1 To CInt(numMess)
                thisResponse += Replace(SendCommand(netstream, "top " & thisMess & " 10" & vbCrLf), vbCrLf, "<br>")
            Next
        Else
            Response.Write("Messages: None" & "<br>")
        End If
        thisResponse += Replace(SendCommand(netstream, "stat" & vbCrLf), vbCrLf, "<br>")
        tmpArray = Split(thisResponse, "+OK")
        Response.Write(thisResponse & "<br>--------------------------------------------<br>")
        Dim msg As Integer
        For msg = 1 To tmpArray.Length - 1
            Response.Write("<h3>#" & msg & "</h3><pre>" & tmpArray(msg) & "</pre>")
        Next
        ' close connection
        thisResponse = SendCommand(netstream, "QUIT" & vbCrLf)
        tcpC.Close()
    End Function
End Class