오늘의 C# 공부 :server / client

/////////// server

using System;
using System.Diagnostics;
using System.Net;
using System.Net.Sockets;
using System.Text;

namespace EchoServer
{
    class MainApp
    {
        static void Main(string[] args)
        {
            if (args.Length < 1)
            {
                Console.WriteLine(“사용법 :{0} ”, Process.GetCurrentProcess().ProcessName);
                return;
            }

            string bindIp = args[0];
            const int bindfort = 5425;
            TcpListener server = null;

            try
            {
                IPEndPoint localAddress =
                    new IPEndPoint(IPAddress.Parse(bindIp), bindfort);

server = new TcpListener(localAddress);

server.Start();

Console.WriteLine(“메아리 서버 시작…”);

                while (true)
                {
                    TcpClient client = server.AcceptTcpClient();
                    Console.WriteLine(“클라이언트 접속 :{0}”, ((IPEndPoint)client.Client.RemoteEndPoint).ToString());

NetworkStream stream = client.GetStream();

                    int length;
                    string data = null;
                    byte[] bytes = new byte[256];

                        while ((length = stream.Read(bytes,0,bytes.Length)) != 0)
                        {
                            data = Encoding.Default.GetString(bytes, 0, length);
                            Console.WriteLine (String.Format(“수신{0}",data)) ;
                            byte[] msg = Encoding.Default.GetBytes(data);
                            stream.Write(msg, 0, msg.Length);

Console.WriteLine(String.Format(“송신: {0}”, data));
}

                        stream.Close();
                        client.Close();
                }

}

            catch (SocketException e)
            {
                Console.WriteLine(e);
            }

            finally
            {
                server.Stop();
            }

Console.WriteLine(“서버를 종료합니다”);

}
}
}

//////Client

using System;
using System.Diagnostics;
using System.Net;
using System.Net.Sockets;
using System.Text;

namespace jpClient
{
    class MainApp
    {
        static void Main(string[] args)
        {
             Console.WriteLine(“args={0}",args.Length);
            if (args.Length < 4)
            {
                Console.WriteLine(
                    “사용법 : {0} ”, Process.GetCurrentProcess().ProcessName);
                return;
            }

            string bindIP = args[0];
            int bindPort = Convert.ToInt32(args[1]);
            string serverIP = args[2];
            const int serverPort = 5425;
            string message = args[3];

            try
            {
                IPEndPoint clientAddress =
                    new IPEndPoint(IPAddress.Parse(bindIP), bindPort);
                IPEndPoint serverAddress =
                    new IPEndPoint(IPAddress.Parse(serverIP), serverPort);

Console.WriteLine(“클라이언트 : {0} , 서버 : {1}”, clientAddress.ToString(), serverAddress.ToString());

TcpClient client = new TcpClient(clientAddress);

client.Connect(serverAddress);

byte[] data = System.Text.Encoding.Default.GetBytes(message);

NetworkStream stream = client.GetStream();

stream.Write(data, 0, data.Length);

Console.WriteLine(“송신 :{0}”, message);

data = new byte[256];

string responseData = “”;

int bytes = stream.Read(data, 0, data.Length);

responseData = Encoding.Default.GetString(data, 0, bytes);

Console.WriteLine(“수신 :{0}”, responseData);

                stream.Close();
                client.Close();
            }

            catch (SocketException e)
            {
                Console.WriteLine(e);
            }

Console.WriteLine(“클라이언트를 종료합니다”);

}
}
}