Question

在我的Startup.Auth.cs：

中

private static void ConfigSignalR(IAppBuilder appBuilder)
{
    appBuilder.MapSignalR();
    var idProvider = new PrincipalUserIdProvider();
    GlobalHost.DependencyResolver.Register(typeof(IUserIdProvider), () => idProvider);
}

我的UserHub.cs：

public class UserHub : Hub
{
}

在服务器端，在我的一个API Controller操作（与网格更新相关的Put）中：

[...]
var userHub = GlobalHost.ConnectionManager.GetHubContext<UserHub>();
// Line below does not work
// userHub.Clients.User(userId).send("Hi");

// But this line below works when sending the message to everybody
userHub.Clients.All.send("Hi");

return Request.CreateResponse(HttpStatusCode.OK);

在JS View客户端：

@Request.IsAuthenticated
{
    <script>

        $(function() {
            var userHub = $.connection.userHub;

            console.log(userHub.client);

            userHub.client.send = function(message) {
                alert('received: ' + message);
            };

            $.connection.hub.start().done(function() {
            });
        });
    </script>
}

为什么通过userId我的客户什么都没收到？（也尝试通过userName，结果相同）。

[编辑] 从技术上讲，实现这一目标的正确方法是利用IUserIdProvider：

的实施

但是，我注意到在我的情况下，传递给User方法的IRequest对象的GetUserId属性始终设置为null ...

Answer 1

实际上已经解决了另一个问题，就在这里：https://stackoverflow.com/a/22028296/4636721

问题在于Startup.Auth.cs中的初始化顺序：必须在Cookie之后初始化SignalR并且OwinContext初始化（例如传递给IUserIdProvider的{{1}}收到包含非空GlobalHost.DependencyResolver.Register的{{1}} IRequest方法：

User

使用下面的GetUserId，我明确声明我想要使用UserId而不是public partial class Startup { public void ConfigureAuth(IAppBuilder appBuilder) { // Order matters here... // Otherwise SignalR won't get Identity User information passed to Id Provider... ConfigOwinContext(appBuilder); ConfigCookies(appBuilder); ConfigSignalR(appBuilder); } private static void ConfigOwinContext(IAppBuilder appBuilder) { appBuilder.CreatePerOwinContext(ApplicationDbContext.Create); appBuilder.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create); appBuilder.CreatePerOwinContext<ApplicationSignInManager>(ApplicationSignInManager.Create); appBuilder.CreatePerOwinContext<ApplicationSignInManager>(ApplicationSignInManager.Create); appBuilder.CreatePerOwinContext(LdapAdEmailAuthenticator.Create); } private static void ConfigCookies(IAppBuilder appBuilder) { appBuilder.UseCookieAuthentication(new CookieAuthenticationOptions { AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie, LoginPath = new PathString("/Account/Login"), Provider = new CookieAuthenticationProvider { OnValidateIdentity = SecurityStampValidator.OnValidateIdentity<ApplicationUserManager, ApplicationUser> ( TimeSpan.FromHours(4), (manager, user) => user.GenerateUserIdentityAsync(manager) ) } }); appBuilder.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie); appBuilder.UseTwoFactorSignInCookie(DefaultAuthenticationTypes.TwoFactorCookie, TimeSpan.FromMinutes(5)); appBuilder.UseTwoFactorRememberBrowserCookie(DefaultAuthenticationTypes.TwoFactorRememberBrowserCookie); } private static void ConfigSignalR(IAppBuilder appBuilder) { appBuilder.MapSignalR(); var idProvider = new HubIdentityUserIdProvider(); GlobalHost.DependencyResolver.Register(typeof(IUserIdProvider), () => idProvider); } }的默认实现，即IUserIdProvider所给出的UserName：

IUserIdProvider

如何通过SignalR将消息发送给特定用户（身份标识）？

1 个答案: