Question

我已经创建了一个用于聊天的聊天服务器。在那里我连接客户端的PC，这将允许他们聊天。在我的情况下，服务器允许我连接，但我无法与其他人聊天使用我的应用程序。请查看我的代码并更正它。这是我的代码。

客户端代码：

 Imports System.Net.Sockets
    Imports System.Text
    Public Class Form1
        Dim clientSocket As New System.Net.Sockets.TcpClient()
        Dim serverStream As NetworkStream
        Dim readData As String
        Dim infiniteCounter As Integer

        Private Sub Button1_Click(ByVal sender As System.Object, _
            ByVal e As System.EventArgs) Handles Button1.Click
            Dim outStream As Byte() = _
            System.Text.Encoding.ASCII.GetBytes(TextBox2.Text + "$")
            serverStream.Write(outStream, 0, outStream.Length)
            serverStream.Flush()
        End Sub

        Private Sub msg()
            If Me.InvokeRequired Then
                Me.Invoke(New MethodInvoker(AddressOf msg))
            Else
                TextBox1.Text = TextBox1.Text + Environment.NewLine + " >> " + readData
            End If
        End Sub

        Private Sub Button2_Click(ByVal sender As System.Object, _
        ByVal e As System.EventArgs) Handles Button2.Click
            readData = "Conected to Chat Server ..."
            msg()
            clientSocket.Connect("192.168.1.215", 8888)
            'Label1.Text = "Client Socket Program - Server Connected ..."
            serverStream = clientSocket.GetStream()

            Dim outStream As Byte() = _
            System.Text.Encoding.ASCII.GetBytes(TextBox3.Text + "$")
            serverStream.Write(outStream, 0, outStream.Length)
            serverStream.Flush()

            Dim ctThread As Threading.Thread = New Threading.Thread(AddressOf getMessage)
            ctThread.Start()
        End Sub

        Private Sub getMessage()
            For infiniteCounter = 1 To 2
                infiniteCounter = 1
                serverStream = clientSocket.GetStream()
                Dim buffSize As Integer
                Dim inStream(10024) As Byte
                buffSize = clientSocket.ReceiveBufferSize
                serverStream.Read(inStream, 0, buffSize)
                Dim returndata As String = _
                System.Text.Encoding.ASCII.GetString(inStream)
                readData = "" + returndata
                msg()
            Next
        End Sub
    End Class

服务器端代码：

Imports System.Net.Sockets
Imports System.Text
Module Module1
    Dim clientsList As New Hashtable
    Sub Main()
        Dim serverSocket As New TcpListener(8888)
        Dim clientSocket As TcpClient
        Dim infiniteCounter As Integer
        Dim counter As Integer

        serverSocket.Start()
        msg("Chat Server Started ....")
        counter = 0
        infiniteCounter = 0
        For infiniteCounter = 1 To 2
            infiniteCounter = 1
            counter += 1
            clientSocket = serverSocket.AcceptTcpClient()

            Dim bytesFrom(10024) As Byte
            Dim dataFromClient As String

            Dim networkStream As NetworkStream = _
            clientSocket.GetStream()
            networkStream.Read(bytesFrom, 0, CInt(clientSocket.ReceiveBufferSize))
            dataFromClient = System.Text.Encoding.ASCII.GetString(bytesFrom)
            dataFromClient = _
            dataFromClient.Substring(0, dataFromClient.IndexOf("$"))

            clientsList(dataFromClient) = clientSocket

            broadcast(dataFromClient + " Joined ", dataFromClient, False)

            msg(dataFromClient + " Joined chat room ")
            Dim client As New handleClinet
            client.startClient(clientSocket, dataFromClient, clientsList)
        Next

        clientSocket.Close()
        serverSocket.Stop()
        msg("exit")
        Console.ReadLine()
    End Sub

    Sub msg(ByVal mesg As String)
        mesg.Trim()
        Console.WriteLine(" >> " + mesg)
    End Sub
    Private Sub broadcast(ByVal msg As String, _
    ByVal uName As String, ByVal flag As Boolean)
        Dim Item As DictionaryEntry
        For Each Item In clientsList
            Dim broadcastSocket As TcpClient
            broadcastSocket = CType(Item.Value, TcpClient)
            Dim broadcastStream As NetworkStream = _
                    broadcastSocket.GetStream()
            Dim broadcastBytes As [Byte]()

            If flag = True Then
                broadcastBytes = Encoding.ASCII.GetBytes(uName + " says : " + msg)
            Else
                broadcastBytes = Encoding.ASCII.GetBytes(msg)
            End If

            broadcastStream.Write(broadcastBytes, 0, broadcastBytes.Length)
            broadcastStream.Flush()
        Next
    End Sub

    Public Class handleClinet
        Dim clientSocket As TcpClient
        Dim clNo As String
        Dim clientsList As Hashtable

        Public Sub startClient(ByVal inClientSocket As TcpClient, _
        ByVal clineNo As String, ByVal cList As Hashtable)
            Me.clientSocket = inClientSocket
            Me.clNo = clineNo
            Me.clientsList = cList
            Dim ctThread As Threading.Thread = New Threading.Thread(AddressOf doChat)
            ctThread.Start()
        End Sub

        Private Sub doChat()
            Dim infiniteCounter As Integer
            Dim requestCount As Integer
            Dim bytesFrom(10024) As Byte
            Dim dataFromClient As String
            Dim sendBytes As [Byte]()
            Dim serverResponse As String
            Dim rCount As String
            requestCount = 0
            For infiniteCounter = 1 To 2
                infiniteCounter = 1
                Try
                    requestCount = requestCount + 1
                    Dim networkStream As NetworkStream = _
                            clientSocket.GetStream()
                    networkStream.Read(bytesFrom, 0, CInt(clientSocket.ReceiveBufferSize))
                    dataFromClient = System.Text.Encoding.ASCII.GetString(bytesFrom)
                    dataFromClient = _
                        dataFromClient.Substring(0, dataFromClient.IndexOf("$"))
                    msg("From client - " + clNo + " : " + dataFromClient)
                    rCount = Convert.ToString(requestCount)

                    broadcast(dataFromClient, clNo, True)
                Catch ex As Exception
                    MsgBox(ex.ToString)
                End Try
            Next
        End Sub

    End Class
End Module

Answer 1

一，您需要指定PUBLIC IP地址，其次，您需要在路由器上打开端口8888.

将：clientSocket.Connect（“192.168.1.215”，8888）更改为：

clientSocket.Connect（“”，8888）

并确保将端口8888转发到您的内部LAN IP：192.168.1.215

这也完全不安全，我会使用三重DES加密和解密字符串。一点点安全，但至少是它的安全性。

了解网络萌芽。

vb.net多线程聊天客户端和服务器

1 个答案: