Basic websocket setup

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");
+    }
+}