Basic websocket setup

.gitignore

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+.idea
+bin
+obj
+Properties
+appsettings.Local.json

Controllers/WebSocketsController.cs

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+using System.Net.WebSockets;
+using System.Text;
+using Microsoft.AspNetCore.Mvc;
+
+namespace MauMau_Server.Controllers;
+
+[ApiController]
+[Route("[controller]")]
+public class WebSocketsController : ControllerBase
+{
+    private readonly ILogger<WebSocketsController> _logger;
+
+    public WebSocketsController(ILogger<WebSocketsController> logger)
+    {
+        _logger = logger;
+    }
+
+    [HttpGet("/ws")]
+    public async Task Get()
+    {
+        if (HttpContext.WebSockets.IsWebSocketRequest)
+        {
+            using var webSocket = await HttpContext.WebSockets.AcceptWebSocketAsync();
+            _logger.Log(LogLevel.Information, "WebSocket connection established");
+            await Echo(webSocket);
+        }
+        else
+        {
+            HttpContext.Response.StatusCode = 400;
+        }
+    }
+        
+    private async Task Echo(WebSocket webSocket)
+    {
+        var buffer = new byte[1024 * 4];
+        var result = await webSocket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
+        _logger.Log(LogLevel.Information, "Message received from Client");
+
+        while (!result.CloseStatus.HasValue)
+        {
+            var serverMsg = Encoding.UTF8.GetBytes($"Server: Hello. You said: {Encoding.UTF8.GetString(buffer)}");
+            await webSocket.SendAsync(new ArraySegment<byte>(serverMsg, 0, serverMsg.Length), result.MessageType, result.EndOfMessage, CancellationToken.None);
+            _logger.Log(LogLevel.Information, "Message sent to Client");
+
+            buffer = new byte[1024 * 4];
+            result = await webSocket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
+            _logger.Log(LogLevel.Information, "Message received from Client");
+                
+        }
+        await webSocket.CloseAsync(result.CloseStatus.Value, result.CloseStatusDescription, CancellationToken.None);
+        _logger.Log(LogLevel.Information, "WebSocket connection closed");
+    }
+}

MauMau-Server.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net7.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <RootNamespace>MauMau_Server</RootNamespace>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNet.SignalR" Version="2.4.3" />
+    <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="7.0.3" />
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.4.0" />
+  </ItemGroup>
+
+</Project>

Program.cs

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+var builder = WebApplication.CreateBuilder(args);
+
+// Add services to the container.
+var services = builder.Services;
+services.AddControllers();
+// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
+services.AddEndpointsApiExplorer();
+services.AddSwaggerGen();
+
+var app = builder.Build();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment())
+{
+    app.UseSwagger();
+    app.UseSwaggerUI();
+}
+
+var webSocketOptions = new WebSocketOptions()
+{
+    KeepAliveInterval = TimeSpan.FromSeconds(120),
+};
+
+app.UseWebSockets(webSocketOptions);
+
+app.UseHttpsRedirection();
+app.UseAuthorization();
+app.MapControllers();
+app.Run();

README.md

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+Mau

appsettings.Development.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

appsettings.json

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+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*"
+}