多线程TCP客户端

Question

确定一些背景。 我正在编写一个TCP客户端，该客户端从Minecraft服务器获取信息。

我想让一个客户端同时从10个服务器获取信息。 因此，为此，我必须使用多线程。

这是我到目前为止的代码，但是似乎没有用。

Imports System.Net.Sockets
Imports System.Text
Imports System.IO

Module main
Private socketclient As New System.Net.Sockets.TcpClient()

Sub Main()
    Dim serverList() As String = _
    {"ag1.playeoe.com", "lava-craft.net", "play.diamcraft.com", "mc.ecocitycraft.com", "main.kingscrafters.com", "pvp.cursecraft.net"}

    For i = 0 To serverList.Length - 1 Step 1
        Console.WriteLine("Connecting to " & serverList(i) & ":" & port & "..")
        socketclient.BeginConnect(serverList(i), "25565", New AsyncCallback(AddressOf connect), socketclient)
        Threading.Thread.Sleep(1000)
    Next

    Console.ReadLine()

End Sub

Public Sub connect(ByVal ar As IAsyncResult)
    If socketclient.Connected = True Then
        Console.WriteLine("Connected!")
        Dim stream As NetworkStream = socketclient.GetStream
        Dim sendBytes As [Byte]() = {&HFE}
        Console.WriteLine("Sending Data...")
        stream.Write(sendBytes, 0, sendBytes.Length)

        'copied
        Console.WriteLine("Recieving Response..." & vbNewLine)
        Dim bytes(421) As Byte
        stream.Read(bytes, 0, CInt(421))

        'Trim Bytes
        Dim trimbytes(bytes.Length - 3) As Byte
        Array.Copy(bytes, 3, trimbytes, 0, bytes.Length - 3)

        'Process output
        Dim sb As New System.Text.StringBuilder
        For i As Integer = 1 To 241 Step 2
            If trimbytes(i) <> 0 Then
                sb.Append(ChrW(BitConverter.ToInt16(trimbytes, i)))
            End If
        Next i
        Dim message() As String = sb.ToString.Split("§")

        'Display OutPut
        Console.WriteLine("----------Response Begin----------")
        Console.WriteLine(message(0))
        Console.WriteLine(message(1))
        Console.WriteLine(message(2))
        Console.WriteLine("----------Response End----------" & vbNewLine & vbNewLine)

        socketclient.Close()
    End If
End Sub
End Module

现在这似乎不起作用。 我仅从第一台服务器获取数据，而其余部分则没有。 当我调试它时，它表明该套接字未为其他服务器打开。

这是输出

Answer 1

您已经将客户端作为状态变量传递给BeginConnect。 您可以通过传递给回调的IAsyncResult（ar）访问特定的客户端。 只需将state属性转换为TcpClient即可。

---

抱歉，假设您听取了评论者的建议，并为每个服务器地址新建了一个新的客户端对象。

Answer 2

无论如何我都不是VB专家，因此您需要使用语法，但这应该可以帮助您开始：

Module main

Sub Main()
    Dim serverList() As String = _
    {"ag1.playeoe.com", "lava-craft.net", "play.diamcraft.com", "mc.ecocitycraft.com", "main.kingscrafters.com", "pvp.cursecraft.net"}

    For i = 0 To serverList.Length - 1 Step 1
        Console.WriteLine("Connecting to " & serverList(i) & ":" & port & "..")
        Dim socketclient As New System.Net.Sockets.TcpClient()
        socketclient.BeginConnect(serverList(i), "25565", New AsyncCallback(AddressOf     connect), socketclient)
        Threading.Thread.Sleep(1000)
    Next

    Console.ReadLine()

End Sub

Public Sub connect(ByVal ar As IAsyncResult)
    Dim socketClient As CType(ar.AsyncState, System.Net.Sockets.TcpClient)
    If socketclient.Connected = True Then
    ... // Everything else can stay the same.

Answer 3

您正在将beginConnect函数的参数PORT作为字符串而不是整数传递。

隐式转换将0作为函数调用中的参数。

（int）“ 25565” = 0