如何为多个客户端制作简单的Socket Server？ [英] How to make simple Socket Server for multiple clients?

问题描述

我试过这个：

服务器：

 IPHostEntry ipHostInfo = Dns.Resolve（Dns.GetHostName（））; 
 IPAddress ipAddress = ipHostInfo.AddressList [ 0 ]; 
  for （ int  i =  0 ; i <  max_clients; i ++）
 {
 endpoint [i] =  new  IPEndPoint（ipAddress，port_starting + i）; 
 listener [i] =  new  Socket（AddressFamily.InterNetwork，SocketType.Stream，ProtocolType.Tcp）; 
 listener [i] .Bind（endpoint [i]）; 
 listener [i] .Listen（ 100 ）; 
} 
 
  while （ true ）{
  for （ int  i =  0 ; i <  max_clients; i ++）
 {
  try  
 {
  byte  [] bytes =  new   byte  [ 1500 ]; 
 listener [i] .Receive（bytes，bytes.Length，SocketFlags.None）; 
  if （bytes [ 0 ]。ToString（）！=  ）
 {
  // 当我通过客户端发送数据时不在这里 
  string  st = Encoding.UTF8.GetString（字节）; 
 st + =   =; 
} 
} 
  catch （例外c）{} 
} 
 Thread.Sleep（ 100 ）
} 

客户：

 尝试 
 {
s = 新套接字（AddressFamily.InterNetwork，
 SocketType.Stream，
 ProtocolType.Tcp）; 
  int  port =  int  .Parse（txtPort.Text）; 
 s.Connect（txtIP.Text，port）; 
 toolStripStatusLabel1.Text =  已连接到 + txtIP.Text; 
} 
  catch （例外c）{
 MessageBox.Show（c.ToString（））; 
} 
 
  private   void  button1_Click（ object  sender，EventArgs e）
 {
  //  当我向其发送数据时，服务器上没有任何反应 
  string  str = txtmobileNo.Text +    | + txtAmount.Text; 
 s.Send（Encoding.UTF8.GetBytes（str）， 0 ，str.Length，SocketFlags.None）; 
 
} 

请帮助。

解决方案

这样更容易改为使用 System.Net.Sockets.TcpClient和System.Net.Sockets.TcpListener 来代替：

http://msdn.microsoft.com/en-us/library/system.net.sockets.tcpclient.aspx [ ^ ]，

http：// msdn .microsoft.com / zh-cn / library / system.net.sockets.tcplistener.aspx [ ^ ]。



为了成功，它至关重要你如何使用线程，特别是在服务器端。操作的模式应该是这样的：在服务端，你需要两个独立的线程：一个接受新的客户端连接（让我们称之为监听线程），另一个在一些应用程序之后写入和从NetworkStream读取数据你在循环中使用所有可用的远程（客户端）套接字开发的级别协议（让我们称之为通信线程）。



对于某些想法，请更详细地看看我过去的答案：

来自同一端口号码的多个客户端 [ ^ ]，

业余问题在套接字编程中 [ ^ ]。



祝你好运，

-SA

I tried this:
Server:

IPHostEntry ipHostInfo = Dns.Resolve(Dns.GetHostName());
IPAddress ipAddress = ipHostInfo.AddressList[0];
for (int i = 0; i < max_clients; i++)
{
    endpoint[i] = new IPEndPoint(ipAddress, port_starting + i);
    listener[i] = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
    listener[i].Bind(endpoint[i]);
    listener[i].Listen(100);
}

while(true){
            for (int i = 0; i < max_clients; i++)
            {
                try
                {
                    byte[] bytes = new byte[1500];
                    listener[i].Receive(bytes, bytes.Length, SocketFlags.None);
                    if (bytes[0].ToString() != "")
                    {
                    // not going here when I sent data by client
                        string st = Encoding.UTF8.GetString(bytes);
                        st += "="; 
                    }
                }
                catch (Exception c) { }
            }
Thread.Sleep(100)
}

Client:

try
{
    s = new Socket(AddressFamily.InterNetwork,
                   SocketType.Stream,
                   ProtocolType.Tcp);
    int port = int.Parse(txtPort.Text);
    s.Connect(txtIP.Text, port);
    toolStripStatusLabel1.Text = "Connected to " + txtIP.Text;
 }
catch (Exception c) {
    MessageBox.Show(c.ToString());
}

       private void button1_Click(object sender, EventArgs e)
        {
//nothing happens on server when I sent data to it
                string str = txtmobileNo.Text + "|" + txtAmount.Text;
                s.Send(Encoding.UTF8.GetBytes(str), 0, str.Length, SocketFlags.None);
           
}

Please help.

解决方案

It''s much easier to do the same using System.Net.Sockets.TcpClient and System.Net.Sockets.TcpListener instead:
http://msdn.microsoft.com/en-us/library/system.net.sockets.tcpclient.aspx[^],
http://msdn.microsoft.com/en-us/library/system.net.sockets.tcplistener.aspx[^].

For success, it''s critically important how you use threading, especially on server side. The schema of the operation should be like this: on the service side, you need two separate threads: one accepts new client connections (let''s call it listening thread), another one writes and reads data to/from NetworkStream following some application-level protocol you develop in cycle with all available remote (client''s) sockets (let''s call it communication thread).

For some ideas, please see my past answers with a lot more detail:
Multple clients from same port Number[^],
an amateur question in socket programming[^].

Good luck,

—SA

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