XNet/XNet.Business/Net/WsServer.cs

using MessagePack;
using System.Net.WebSockets;

namespace XNet.Business.Net
{
    public static class WsServer
    {
        // 启动WebSocket监听
        public static void MapWebSocketServer(this WebApplication app, WsConnectionManager wsManager)
        {
            app.Map("/ws", async context =>
            {
                if (!context.WebSockets.IsWebSocketRequest)
                {
                    context.Response.StatusCode = StatusCodes.Status400BadRequest;
                    return;
                }

                // 建立WebSocket连接
                using var webSocket = await context.WebSockets.AcceptWebSocketAsync();
                string connId = wsManager.AddConnection(webSocket);

                // 接收客户端消息（订阅实例等）
                var buffer = new byte[1024 * 4];
                try
                {
                    while (webSocket.State == WebSocketState.Open)
                    {
                        var result = await webSocket.ReceiveAsync(new ArraySegment<byte>(buffer), CancellationToken.None);
                        if (result.MessageType == WebSocketMessageType.Close)
                        {
                            await webSocket.CloseAsync(WebSocketCloseStatus.NormalClosure, "Closed by client", CancellationToken.None);
                            break;
                        }

                        //byte[] data = new byte[result.Count];
                        //Buffer.BlockCopy(buffer, 0, data, 0, result.Count);
                        //new ArraySegment<byte>(data, 0, dataLength)
                        var wsMsg = MessagePackSerializer.Deserialize<BaseMsg>(new ArraySegment<byte>(buffer, 0, result.Count));

                        if (wsMsg == null) continue;

                        // 处理订阅实例请求
                        if (wsMsg.Type == WsMsgType.CREATE_OR_JOIN_ROOM)
                        {
                            var subscribeReq = MessagePackSerializer.Deserialize<SubscribeInstanceReq>(wsMsg.Data);
                            if (subscribeReq != null)
                            {
                                string createRoomId = string.Empty;
                                wsManager.SubscribeInstance(connId, subscribeReq.RoomId, ref createRoomId);
                            }
                        }
                    }
                }
                catch (Exception ex)
                {
                    Console.WriteLine($"[WS] 连接 {connId} 异常：{ex.Message}");
                }
                finally
                {
                    wsManager.RemoveConnection(connId);
                }
            });
        }
    }
}