3 semestr kr1

3SemestrKr1/3SemestrKr1.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.4.33403.182
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "3SemestrKr1", "3SemestrKr1\3SemestrKr1.csproj", "{AB1D2303-6545-4CCD-87E5-1E5485F7F187}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{AB1D2303-6545-4CCD-87E5-1E5485F7F187}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{AB1D2303-6545-4CCD-87E5-1E5485F7F187}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{AB1D2303-6545-4CCD-87E5-1E5485F7F187}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{AB1D2303-6545-4CCD-87E5-1E5485F7F187}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {DC079B2E-8D6D-48F5-B092-E5AA61958569}
+	EndGlobalSection
+EndGlobal

3SemestrKr1/3SemestrKr1/3SemestrKr1.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net7.0</TargetFramework>
+    <RootNamespace>_3SemestrKr1</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

3SemestrKr1/3SemestrKr1/Program.cs

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+using System;
+using _3SemestrKr1;
+
+class Program
+{
+    public static async Task Main(string[] args)
+    {
+
+        if (args == null || args.Length > 2 || args.Length == 0)
+        {
+            throw new ArgumentException();
+        }
+
+        var port = 0;
+        var correct = int.TryParse(args[0], out port);
+        if (!correct)
+        {
+            throw new ArgumentException();
+        }
+        if (args.Length == 1)
+        {
+            var server = new ServerAndClient(8888);
+            await server.StartServer();
+            server.Talk();
+        }
+        else
+        {
+            var client = new ServerAndClient(args[1], port);
+            client.Talk();
+        }
+    }
+}

3SemestrKr1/3SemestrKr1/ServerAndClient.cs

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+using System.Net;
+using System.Net.Sockets;
+using System.Net.WebSockets;
+
+namespace _3SemestrKr1;
+
+public class ServerAndClient
+{
+    private static int _port;
+    private static TcpListener? _listener;
+    private static TcpClient? _client;
+    private static string? _ipAddress;
+    private static Socket? _socket;
+    private static NetworkStream? stream;
+
+    public ServerAndClient(int port)
+    {
+        _port = port;
+        _listener = new TcpListener(IPAddress.Any, port);
+    }
+
+    public async Task StartServer()
+    {
+        if (_listener == null)
+        {
+            throw new InvalidProgramException();
+        }
+        _client = await _listener.AcceptTcpClientAsync();
+        _socket = _listener.AcceptSocket();
+        stream = new NetworkStream(_socket);
+    }
+
+    public ServerAndClient(string ipAdress, int port)
+    {
+        _port = port;
+        _ipAddress = ipAdress;
+        _client = new TcpClient(ipAdress, port);
+    }
+
+    public void Talk()
+    {
+        if (_socket == null || stream == null)
+        {
+            throw new ArgumentNullException();
+        }
+
+        while (true)
+        {
+            var writer = new StreamWriter(stream);
+            var reader = new StreamReader(stream);
+            var data = reader.ReadToEnd();
+            if (string.Compare(data, "exit") == 0)
+            {
+                _socket.Shutdown(SocketShutdown.Both);
+                if (_client != null)
+                {
+                    _client.Close();
+                }
+                if (_listener!= null)
+                {
+                    _listener.Server.Close();
+                }
+                break;
+            }
+            Console.WriteLine(reader);
+            var someText = Console.ReadLine();
+            writer.WriteLine(someText);
+        }
+    }
+}