dotnet new -i Microsoft.AspNetCore.Blazor.Templates:3.2.0-preview1.20073.1

public static async Task Main(string[] args)
        {
            var builder = WebAssemblyHostBuilder.CreateDefault(args);

            builder.RootComponents.Add<App>("app");

            await builder.Build().RunAsync();
        }

public static async Task Main(string[] args)
        {
            var builder = WebAssemblyHostBuilder.CreateDefault(args);

            builder.Services.AddScoped<ApiService>();
            builder.Services.AddScoped<FunctionHelper>();
            builder.Services.AddScoped<LocalStorage>();
            builder.Services.AddScoped<CustomAuthStateProvider>();
            builder.Services.AddScoped<AuthenticationStateProvider>(s => s.GetRequiredService<CustomAuthStateProvider>());
            builder.Services.AddAuthorizationCore(c=> {
                c.AddPolicy("default", a => a.RequireAuthenticatedUser());
                c.DefaultPolicy = c.GetPolicy("default");
            });
            builder.Services.AddScoped(sp=>new ClientWebSocket());

            builder.RootComponents.Add<App>("app");

            WebAssemblyHttpMessageHandlerOptions.DefaultCredentials = FetchCredentialsOption.Include;
            await builder.Build().RunAsync();
        }

<Router AppAssembly="@typeof(Program).Assembly">
    <Found Context="routeData">
        <AuthorizeRouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)" />
    </Found>
    <NotFound>
        <CascadingAuthenticationState>
            <LayoutView Layout="@typeof(MainLayout)">
                <p>Sorry, there''s nothing at this address.</p>
            </LayoutView>
        </CascadingAuthenticationState>
    </NotFound>
</Router>

builder.Services.AddScoped<CustomAuthStateProvider>();
            builder.Services.AddScoped<AuthenticationStateProvider>(s => s.GetRequiredService<CustomAuthStateProvider>());
            //在wasm中没有默认配置，所以需要设置一下
            builder.Services.AddAuthorizationCore(c=> {
                c.AddPolicy("default", a => a.RequireAuthenticatedUser());
                c.DefaultPolicy = c.GetPolicy("default");
            });

public class CustomAuthStateProvider : AuthenticationStateProvider
    {
        ApiService _apiService;
        Player _playerCache;
        public CustomAuthStateProvider(ApiService apiService)
        {
            _apiService = apiService;
        }

        public override async Task<AuthenticationState> GetAuthenticationStateAsync()
        {
            var player = _playerCache??= await _apiService.GetPlayer();

            if (player == null)
            {
                return new AuthenticationState(new ClaimsPrincipal());
            }
            else
            {
                //认证通过则提供ClaimsPrincipal
                var user = Utils.GetClaimsIdentity(player);
                return new AuthenticationState(user);
            }

        }
        /// <summary>
        /// 通知AuthorizeView等用户状态更改
        /// </summary>
        public void NotifyAuthenticationState()
        {
            NotifyAuthenticationStateChanged(GetAuthenticationStateAsync());
        }
        /// <summary>
        /// 提供Player并通知AuthorizeView等用户状态更改
        /// </summary>
        public void NotifyAuthenticationState(Player player)
        {
            _playerCache = player;
            NotifyAuthenticationState();
        }
    }

<AuthorizeView>
    <Authorized>
     //认证通过 @context.User
    </Authorized>
    <NotAuthorized>
     //认证不通过
    </NotAuthorized>
</AuthorizeView>

[CascadingParameter]
private Task<AuthenticationState> authenticationStateTask { get; set; }

private async Task GetPlayer()
    {
        var user = await authenticationStateTask;
        if (user?.User?.Identity?.IsAuthenticated == true)
        {
            player = new Player
            {
                Balance = Convert.ToInt32(user.User.FindFirst(nameof(Player.Balance)).Value),
                GameState = user.User.FindFirst(nameof(Player.GameState)).Value,
                Id = user.User.FindFirst(nameof(Player.Id)).Value,
                IsOnline = Convert.ToBoolean(user.User.FindFirst(nameof(Player.IsOnline)).Value),
                Nick = user.User.FindFirst(nameof(Player.Nick)).Value,
                Score = Convert.ToInt32(user.User.FindFirst(nameof(Player.Score)).Value),
            };
            await ConnectWebsocket();
        }
    }

private async Task GetOrAddPlayer(MouseEventArgs e)
    {
        GetOrAddPlayering = true;
        player = await ApiService.GetOrAddPlayer(editNick);
        this.GetOrAddPlayering = false;

        if (player != null)
        {
            CustomAuthStateProvider.NotifyAuthenticationState(player);
            await ConnectWebsocket();
        }

    }

public class FunctionHelper
    {
        private readonly IJSRuntime _jsRuntime;

        public FunctionHelper(IJSRuntime jsRuntime)
        {
            _jsRuntime = jsRuntime;
        }

        public ValueTask Alert(object message)
        {
            //无返回值使用InvokeVoidAsync
            return _jsRuntime.InvokeVoidAsync("alert", message);
        }
    }

public class LocalStorage
    {
        private readonly IJSRuntime _jsRuntime;
        private readonly static JsonSerializerOptions SerializerOptions = new JsonSerializerOptions();

        public LocalStorage(IJSRuntime jsRuntime)
        {
            _jsRuntime = jsRuntime;
        }
        public ValueTask SetAsync(string key, object value)
        {

            if (string.IsNullOrEmpty(key))
            {
                throw new ArgumentException("Cannot be null or empty", nameof(key));
            }

            var json = JsonSerializer.Serialize(value, options: SerializerOptions);

            return _jsRuntime.InvokeVoidAsync("localStorage.setItem", key, json);
        }
        public async ValueTask<T> GetAsync<T>(string key)
        {

            if (string.IsNullOrEmpty(key))
            {
                throw new ArgumentException("Cannot be null or empty", nameof(key));
            }

            //有返回值使用InvokeAsync
            var json =await _jsRuntime.InvokeAsync<string>("localStorage.getItem", key);
            if (json == null)
            {
                return default;
            }

            return JsonSerializer.Deserialize<T>(json, options: SerializerOptions);
        }
        public ValueTask DeleteAsync(string key)
        {
            return _jsRuntime.InvokeVoidAsync(
                $"localStorage.removeItem",key);
        }
    }

    [JSInvokable]
    public async Task ConnectWebsocket()
    {
        Console.WriteLine("ConnectWebsocket");
        var serviceurl = await ApiService.ConnectWebsocket();
        //TODO ConnectWebsocket
        if (!string.IsNullOrWhiteSpace(serviceurl))
            await _jsRuntime.InvokeAsync<string>("newWebSocket", serviceurl, DotNetObjectReference.Create(this));
    }

var gsocket = null;
var gsocketTimeId = null;
function newWebSocket(url, dotnetHelper)
{
    console.log(''newWebSocket'');
    if (gsocket) gsocket.close();
    gsocket = null;
    gsocket = new WebSocket(url);
    gsocket.onopen = function (e) {
        console.log(''websocket connect'');
        //调用C#的onopen();
        dotnetHelper.invokeMethodAsync(''onopen'')
    };
    gsocket.onclose = function (e) {
        console.log(''websocket disconnect'');
        dotnetHelper.invokeMethodAsync(''onclose'')
        gsocket = null;
        clearTimeout(gsocketTimeId);
        gsocketTimeId = setTimeout(function () {
            console.log(''websocket onclose ConnectWebsocket'');
            //调用C#的ConnectWebsocket();
            dotnetHelper.invokeMethodAsync(''ConnectWebsocket'');
            //_self.ConnectWebsocket.call(_self);
        }, 5000);
    };
    gsocket.onmessage = function (e) {
        try {
            console.log(''websocket onmessage'');
            var msg = JSON.parse(e.data);
            //调用C#的onmessage();
            dotnetHelper.invokeMethodAsync(''onmessage'', msg);
            //_self.onmessage.call(_self, msg);
        } catch (e) {
            console.log(e);
            return;
        }
    };
    gsocket.onerror = function (e) {
        console.log(''websocket error'');
        gsocket = null;
        clearTimeout(gsocketTimeId);
        gsocketTimeId = setTimeout(function () {
            console.log(''websocket onerror ConnectWebsocket'');
            dotnetHelper.invokeMethodAsync(''ConnectWebsocket'');
            //_self.ConnectWebsocket.call(_self);
        }, 5000);
    };
}

public async Task ConnectWebsocket()
    {
        Console.WriteLine("ConnectWebsocket");
        //获取Websocket链接
        var serviceurl = await ApiService.ConnectWebsocket();
        if (!string.IsNullOrWhiteSpace(serviceurl))
        {
            wsConnectState = 1010;
            //链接Websocket
            await clientWebSocket.ConnectAsync(new Uri(serviceurl),default);
            //后台接收消息
            ReceiveMessages();
            //链接Websocket时调用
            await onopen();

            //await _jsRuntime.InvokeAsync<string>("newWebSocket", serviceurl, DotNetObjectReference.Create(this));
        }
    }

private async Task ReceiveMessages()
    {
        List<byte> vs = new List<byte>();
        while (true)
        {
            Memory<byte> memory = new Memory<byte>(new byte[1024]);
            var res = await clientWebSocket.ReceiveAsync(memory, default);
            var bt = memory.ToArray().Take(res.Count);
            vs.AddRange(bt);
            if (res.EndOfMessage)
            {
                if (res.MessageType == WebSocketMessageType.Close)
                {
                    onclose();
                }
                else
                {
                    var jsonDocument = JsonSerializer.Deserialize<object>(vs.ToArray());
                    vs.Clear();
                    await onmessage(jsonDocument);
                }
                //当前方法在后台执行，所以我们需要手动更新UI
                StateHasChanged();
            }
        }
    }

public async Task onopen()
    {

        Console.WriteLine("websocket connect");
        wsConnectState = 1;
        await GetDesks();
        StateHasChanged();
    }
    public void onclose()
    {
        Console.WriteLine("websocket disconnect");
        wsConnectState = 0;
    }

    public async Task onmessage(object msgobjer)
    {
        try
        {
            var jsonDocument = JsonSerializer.Deserialize<object>(msgobjer.ToString());
            if (jsonDocument is JsonElement msg)
            {
                if (msg.TryGetProperty("type", out var element) && element.ValueKind == JsonValueKind.String)
                {
                    Console.WriteLine(element.ToString());
                    if (element.GetString() == "Sitdown")
                    {
                        Console.WriteLine(msg.GetProperty("msg").GetString());
                        var deskId = msg.GetProperty("deskId").GetInt32();
                        foreach (var desk in desks)
                        {
                            if (desk.Id.Equals(deskId))
                            {
                                var pos = msg.GetProperty("pos").GetInt32();
                                Console.WriteLine(pos);
                                var player = JsonSerializer.Deserialize<Player>(msg.GetProperty("player").ToString());
                                switch (pos)
                                {
                                    case 1:
                                        desk.player1 = player;
                                        break;
                                    case 2:
                                        desk.player2 = player;
                                        break;
                                    case 3:
                                        desk.player3 = player;
                                        break;

                                }
                                break;
                            }
                        }
                    }
                    else if (element.GetString() == "Standup")
                    {
                        Console.WriteLine(msg.GetProperty("msg").GetString());
                        var deskId = msg.GetProperty("deskId").GetInt32();
                        foreach (var desk in desks)
                        {
                            if (desk.Id.Equals(deskId))
                            {
                                var pos = msg.GetProperty("pos").GetInt32();
                                Console.WriteLine(pos);
                                switch (pos)
                                {
                                    case 1:
                                        desk.player1 = null;
                                        break;
                                    case 2:
                                        desk.player2 = null;
                                        break;
                                    case 3:
                                        desk.player3 = null;
                                        break;

                                }
                                break;
                            }
                        }
                    }
                    else if (element.GetString() == "GameStarted")
                    {
                        Console.WriteLine(msg.GetProperty("msg").GetString());
                        currentChannel.msgs.Insert(0, msg);
                    }
                    else if (element.GetString() == "GameOvered")
                    {
                        Console.WriteLine(msg.GetProperty("msg").GetString());
                        currentChannel.msgs.Insert(0, msg);
                    }
                    else if (element.GetString() == "GamePlay")
                    {

                        ddzid = msg.GetProperty("ddzid").GetString();
                        ddzdata = JsonSerializer.Deserialize<GameInfo>(msg.GetProperty("data").ToString());
                        Console.WriteLine(msg.GetProperty("data").ToString());
                        stage = ddzdata.stage;
                        selectedPokers = new int?[55];
                        if (playTips.Any())
                            playTips.RemoveRange(0, playTips.Count);
                        playTipsIndex = 0;

                        if (this.stage == "游戏结束")
                        {
                            foreach (var ddz in this.ddzdata.players)
                            {
                                if (ddz.id == player.Nick)
                                {
                                    this.player.Score += ddz.score;
                                    break;
                                }
                            }

                        }

                        if (this.ddzdata.operationTimeoutSeconds > 0 && this.ddzdata.operationTimeoutSeconds < 100)
                            await this.operationTimeoutTimer();
                    }
                    else if (element.GetString() == "chanmsg")
                    {
                        currentChannel.msgs.Insert(0, msg);
                        if (currentChannel.msgs.Count > 120)
                            currentChannel.msgs.RemoveRange(100, 20);
                    }

                }
                Console.WriteLine("onmessage_end");
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine($"onmessage_ex_{ex.Message}_{msgobjer}");
        }

    }

private CancellationTokenSource timernnnxx { get; set; }

    //js setTimeout
    private async Task setTimeout(Func<Task> action, int time)
    {
        try
        {
            timernnnxx = new CancellationTokenSource();
            await Task.Delay(time, timernnnxx.Token);
            await action?.Invoke();
        }
        catch (Exception ex)
        {
            Console.WriteLine($"setTimeout_{ex.Message}");
        }

    }
    private async Task operationTimeoutTimer()
    {
        Console.WriteLine("operationTimeoutTimer_" + this.ddzdata.operationTimeoutSeconds);
        if (timernnnxx != null)
        {
            timernnnxx.Cancel(false);
            Console.WriteLine("operationTimeoutTimer 取消");
        }
        this.ddzdata.operationTimeoutSeconds--;
        StateHasChanged();
        if (this.ddzdata.operationTimeoutSeconds > 0)
        {
            await setTimeout(this.operationTimeoutTimer, 1000);
        }
    }