클라이언트 수정 및 Echo 클라이언트 추가

Tutorials/EchoClient/App.config

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+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
+    </startup>
+</configuration>

Tutorials/EchoClient/ClientSimpleTcp.cs

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+using System;
+using System.Net.Sockets;
+using System.Net;
+
+namespace csharp_test_client
+{
+    public class ClientSimpleTcp
+    {
+        public Socket Sock = null;   
+        public string LatestErrorMsg;
+
+
+        //소켓연결        
+        public bool Connect(string ip, int port)
+        {
+            try
+            {
+                IPAddress serverIP = IPAddress.Parse(ip);
+                int serverPort = port;
+
+                Sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
+                Sock.Connect(new IPEndPoint(serverIP, serverPort));
+
+                if (Sock == null || Sock.Connected == false)
+                {
+                    return false;
+                }
+
+                return true;
+            }
+            catch (Exception ex)
+            {
+                LatestErrorMsg = ex.Message;
+                return false;
+            }
+        }
+
+        public Tuple<int,byte[]> Receive()
+        {
+
+            try
+            {
+                byte[] ReadBuffer = new byte[2048];
+                var nRecv = Sock.Receive(ReadBuffer, 0, ReadBuffer.Length, SocketFlags.None);
+
+                if (nRecv == 0)
+                {
+                    return null;
+                }
+
+                return Tuple.Create(nRecv,ReadBuffer);
+            }
+            catch (SocketException se)
+            {
+                LatestErrorMsg = se.Message;
+            }
+
+            return null;
+        }
+
+        //스트림에 쓰기
+        public void Send(byte[] sendData)
+        {
+            try
+            {
+                if (Sock != null && Sock.Connected) //연결상태 유무 확인
+                {
+                    Sock.Send(sendData, 0, sendData.Length, SocketFlags.None);
+                }
+                else
+                {
+                    LatestErrorMsg = "먼저 채팅서버에 접속하세요!";
+                }
+            }
+            catch (SocketException se)
+            {
+                LatestErrorMsg = se.Message;
+            }
+        }
+
+        //소켓과 스트림 닫기
+        public void Close()
+        {
+            if (Sock != null && Sock.Connected)
+            {
+                //Sock.Shutdown(SocketShutdown.Both);
+                Sock.Close();
+            }
+        }
+
+        public bool IsConnected() { return (Sock != null && Sock.Connected) ? true : false; }
+    }
+}

Tutorials/EchoClient/DevLog.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using System.Runtime.CompilerServices;
+using System.Threading;
+
+namespace csharp_test_client
+{
+    public class DevLog
+    {
+        static System.Collections.Concurrent.ConcurrentQueue<string> logMsgQueue = new System.Collections.Concurrent.ConcurrentQueue<string>();
+
+        static Int64 출력가능_로그레벨 = (Int64)LOG_LEVEL.TRACE;
+
+
+
+        static public void Init(LOG_LEVEL logLevel)
+        {
+            ChangeLogLevel(logLevel);
+        }
+
+        static public void ChangeLogLevel(LOG_LEVEL logLevel)
+        {
+            Interlocked.Exchange(ref 출력가능_로그레벨, (int)logLevel);
+        }
+
+        public static LOG_LEVEL CurrentLogLevel()
+        {
+            var curLogLevel = (LOG_LEVEL)Interlocked.Read(ref 출력가능_로그레벨);
+            return curLogLevel;
+        }
+
+        static public void Write(string msg, LOG_LEVEL logLevel = LOG_LEVEL.TRACE,
+                                [CallerFilePath] string fileName = "",
+                                [CallerMemberName] string methodName = "",
+                                [CallerLineNumber] int lineNumber = 0)
+        {
+            if (CurrentLogLevel() <= logLevel)
+            {
+                logMsgQueue.Enqueue(string.Format("{0}:{1}| {2}", DateTime.Now, methodName, msg));
+            }
+        }
+
+        static public bool GetLog(out string msg)
+        {
+            if (logMsgQueue.TryDequeue(out msg))
+            {
+                return true;
+            }
+
+            return false;
+        }
+
+    }
+
+
+    public enum LOG_LEVEL
+    {
+        TRACE,
+        DEBUG,
+        INFO,
+        WARN,
+        ERROR,
+        DISABLE
+    }
+}