Google GO与C#之间的TCP通信案例

我本人也才接触GO两个多月的历史,看了几本英文教程，读了些Github上面的源码，但已经被GO的语言的简洁和强大的并发能力所吸收，也打算继续深入的学习，并应用到自己的工作之中。GO语言目前主要适用于服务端的开发，我参考了一些网络上的教程，做了一些TCP服务端的小练习，其中服务端用GO语言开发，客户端采用C#。具体参考如下的代码：https://github.com/yfl8910/gotcpserver

效果图如下：

服务端代码：

package main 
import ( 
"net" 
"fmt" 
) 
 
var ( maxRead = 25 
    msgStop   = []byte("cmdStop") 
    msgStart  = []byte("cmdContinue") 
    ) 
func main() { 
 
    hostAndPort := "localhost:54321" 
    listener := initServer(hostAndPort) 
    for { 
        conn, err := listener.Accept() 
        checkError(err, "Accept: ") 
        go connectionHandler(conn) 
    } 
} 
func initServer(hostAndPort string) *net.TCPListener { 
    serverAddr, err := net.ResolveTCPAddr("tcp", hostAndPort) 
    checkError(err, "Resolving address:port failed: '" + hostAndPort + "'") 
    //listener, err := net.ListenTCP("tcp", serverAddr) 
    listener, err := net.ListenTCP("tcp", serverAddr) 
    checkError(err, "ListenTCP: ") 
    println("Listening to: ", listener.Addr().String()) 
    return listener 
} 
func connectionHandler(conn net.Conn) { 
    connFrom := conn.RemoteAddr().String() 
    println("Connection from: ", connFrom) 
    talktoclients(conn) 
    for { 
        var ibuf []byte = make([]byte, maxRead + 1) 
        length, err := conn.Read(ibuf[0:maxRead]) 
        ibuf[maxRead] = 0 // to prevent overflow 
    switch err { 
    case nil: 
        handleMsg(length, err, ibuf) 
 
    default: 
        goto DISCONNECT 
    } 
    } 
    DISCONNECT: 
    err := conn.Close() 
    println("Closed connection:" , connFrom) 
    checkError(err, "Close:" ) 
    } 
func talktoclients(to net.Conn) { 
    wrote, err := to.Write(msgStart) 
    checkError(err, "Write: wrote " + string(wrote) + " bytes.") 
} 
func handleMsg(length int, err error, msg []byte) { 
    if length > 0 { 
        for i := 0; ; i++ { 
            if msg[i] == 0 { 
                break 
            } 
        } 
        fmt.Printf("Received data: %v", string(msg[0:length])) 
        fmt.Println("   length:",length) 
    } 
} 
func checkError(error error, info string) { 
    if error != nil { 
panic("ERROR: " + info + " " + error.Error()) // terminate program 
} 
} 

客户端代码：

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Text; 
using System.Windows.Forms; 
using System.Net; 
using System.Net.Sockets; 
using System.Threading; 
 
namespace TcpClient 
{ 
    public partial class Form1 : Form 
    { 
        private IPAddress _ipServer; //服务器IP 
        private IPEndPoint _myServer; //服务器终端 
        private Socket _connectSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//连接套接字 
        private int _port; //端口 
        private Thread receiveThread = null; 
        public Form1() 
        { 
            InitializeComponent(); 
        } 
 
        private bool ValidateInfo() //检验所填信息是否合法 
        { 
            if (!IPAddress.TryParse(txtbxIP.Text, out _ipServer)) 
            { 
                MessageBox.Show("IP地址不合法!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); 
                return false; 
            } 
           if (!int.TryParse(txtbxPortNum.Text, out _port)) 
            { 
                MessageBox.Show("端口号不合法!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); 
                return false; 
            } 
            else 
            { 
                if (_port < 1024 || _port > 65535) 
                { 
                    MessageBox.Show("端口号不合法!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); 
                    return false; 
                } 
            } 
            return true; 
        } 
 
 
        private bool ConnectServer() //连接服务器 
        {           
           try 
            { 
                _connectSocket.Connect(_myServer); 
                _connectSocket.Send(System.Text.Encoding.UTF8.GetBytes(txtbxUser.Text.ToString())); 
                
                return true; 
            } 
            catch 
            { 
                MessageBox.Show("服务器连接异常", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error); 
                return false; 
            } 
        } 
 
 
        private void button1_Click(object sender, EventArgs e) 
        { 
            try 
            {          
                _connectSocket.Send(System.Text.Encoding.UTF8.GetBytes(comboBox1.Text.ToString()));  
            } 
            catch 
            { 
                MessageBox.Show("服务器连接异常", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);    
            } 
            
        } 
 
        private void button3_Click(object sender, EventArgs e) 
        { 
          
            if (!ValidateInfo()) 
            { 
                return; 
            } 
            _myServer = new IPEndPoint(_ipServer, _port); 
 
            if (ConnectServer() == true) 
            { 
                MessageBox.Show("连接成功！"); 
 
            } 
        } 
        private void button2_Click(object sender, EventArgs e) 
        { 
            this.Close(); 
        } 
 
        private void button4_Click(object sender, EventArgs e) 
        { 
            for (int i = 0; i < 1000; i++) { 
                Socket _connectSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); 
                _connectSocket.Connect(_myServer); 
                _connectSocket.Send(System.Text.Encoding.UTF8.GetBytes(comboBox1.Text.ToString()+i)); 
                Thread.Sleep(2); 
             
            } 
            
            
        }    
 
    } 
}