🧱 Setup for the websocket

DysonNetwork.Sphere/Connection/WebSocketController.cs

@@ -0,0 +1,50 @@
+using System.Net.WebSockets;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+
+namespace DysonNetwork.Sphere.Connection;
+
+[ApiController]
+[Route("/ws")]
+public class WebSocketController : ControllerBase
+{
+    [Route("/ws")]
+    [Authorize]
+    public async Task TheGateway()
+    {
+        if (HttpContext.WebSockets.IsWebSocketRequest)
+        {
+            using var webSocket = await HttpContext.WebSockets.AcceptWebSocketAsync();
+            await _ConnectionEventLoop(webSocket);
+        }
+        else
+        {
+            HttpContext.Response.StatusCode = StatusCodes.Status400BadRequest;
+        }
+    }
+    
+    private static async Task _ConnectionEventLoop(WebSocket webSocket)
+    {
+        // For now, it's echo
+        var buffer = new byte[1024 * 4];
+        var receiveResult = await webSocket.ReceiveAsync(
+            new ArraySegment<byte>(buffer), CancellationToken.None);
+
+        while (!receiveResult.CloseStatus.HasValue)
+        {
+            await webSocket.SendAsync(
+                new ArraySegment<byte>(buffer, 0, receiveResult.Count),
+                receiveResult.MessageType,
+                receiveResult.EndOfMessage,
+                CancellationToken.None);
+
+            receiveResult = await webSocket.ReceiveAsync(
+                new ArraySegment<byte>(buffer), CancellationToken.None);
+        }
+
+        await webSocket.CloseAsync(
+            receiveResult.CloseStatus.Value,
+            receiveResult.CloseStatusDescription,
+            CancellationToken.None);
+    }
+}