Question

我正在使用Microsoft.AspNetCore.SignalR nuget包和Bazinga.AspNetCore.Authentication.Basic，它为dotnet核心添加了基本身份验证。我的C＃SignalR客户端在没有身份验证时连接，但是当我添加AuthorizeAttribute时，它通过http连接，http请求头被成功验证，但是Socket没有进行身份验证，因为套接字消息中没有头。

所以我想知道如何将令牌或其他内容传递给经过身份验证的套接字连接，或者是否有我可以遵循的示例代码。我想我应该将一个随机令牌传递给经过身份验证的用户，并且用户需要不断地在消息中传递令牌。

Client project，Server project

服务器

using System.Threading.Tasks;
using Bazinga.AspNetCore.Authentication.Basic;
using Domainlogic;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Cors.Infrastructure;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;

namespace API
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddCors(options => options.AddPolicy("CorsPolicy", builder =>
            {
                builder
                    .AllowAnyMethod()
                    .AllowAnyHeader()
                    .AllowAnyOrigin();
            }));

            services.AddSignalR();

            services.AddAuthentication(BasicAuthenticationDefaults.AuthenticationScheme)
                .AddBasicAuthentication(credentials => Task.FromResult(
                    credentials.username == "SomeUserName"
                    && credentials.password == "SomePassword"));
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.UseCors("CorsPolicy");

            app.UseCors(CorsConstants.AnyOrigin);

            app.UseFileServer();

            app.UseSignalR(route => { route.MapHub<MessageHub>("/chat"); });

            app.UseAuthentication();
        }
    }
}

服务器中心：

using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.SignalR;

namespace Domainlogic
{
    public class MessagePayload
    {
        public string Name { get; set; }

        public string Message { get; set; }

        public DateTime Date { get; set; }        
    }

    [Authorize]
    public class MessageHub : Hub
    {   
        // connected IDs
        private static readonly HashSet<string> ConnectedIds = new HashSet<string>();

        public override async Task OnConnectedAsync()
        {
            ConnectedIds.Add(Context.ConnectionId);

            await Clients.All.SendAsync("SendAction", "joined", ConnectedIds.Count);
        }

        public override async Task OnDisconnectedAsync(Exception ex)
        {
            ConnectedIds.Remove(Context.ConnectionId);

            await Clients.All.SendAsync("SendAction", "left", ConnectedIds.Count);
        }

        public async Task Send(MessagePayload message)
        {
            await Clients.All.SendAsync("SendMessage", message);
        }
    }
}

客户端：

using System;
using System.Net;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http.Connections.Client;
using Microsoft.AspNetCore.SignalR.Client;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using Microsoft.Extensions.Logging;

namespace SignalRClient
{
    public class MessagePayload
    {
        public string Name { get; set; }

        public string Message { get; set; }

        public DateTime Date { get; set; }        
    }

    class Program
    {
        public static string Base64Encode(string plainText) {
            var plainTextBytes = System.Text.Encoding.UTF8.GetBytes(plainText);
            return System.Convert.ToBase64String(plainTextBytes);
        }

        static void Main(string[] args)
        {
            var credential = Convert.ToBase64String(System.Text.Encoding.GetEncoding("ISO-8859-1").GetBytes("SomeUserName" + ":" + "SomePassword"));

            //Set connection
            var connection = new HubConnectionBuilder()
                .WithUrl("http://localhost:5000/chat", options =>
                {
                    options.Headers.Add("Authorization", $"Basic {credential}");
                })
                .AddJsonProtocol()
                .Build();

            connection.On<MessagePayload>("SendMessage", param =>
            {
                Console.WriteLine(param.Message);
            });

            connection.StartAsync().Wait();

            var startTimeSpan = TimeSpan.Zero;
            var periodTimeSpan = TimeSpan.FromSeconds(3);
            int i = 0;

            var timer = new System.Threading.Timer((e) =>
            {
                connection.InvokeAsync<MessagePayload>("Send", new MessagePayload()
                {
                    Message = "Some message: " + i++
                });
            }, null, startTimeSpan, periodTimeSpan);


            Console.Read();
            connection.StopAsync();
        }
    }
}

Answer 1

感谢GitHub上的“davidfowl”，解决方案正在将UseSignalR移到app.UseSignalR(route => { route.MapHub<MessageHub>("/chat"); }); app.UseAuthentication();之上。

来源：https://github.com/aspnet/SignalR/issues/2316

而不是：

app.UseAuthentication();

app.UseSignalR(route => { route.MapHub<MessageHub>("/chat"); });

使用此：

{{1}}

Answer 2

要解决这个问题，我必须在服务器缓存中存储带有connectionId的用户令牌。那是因为在集线器中我无法控制会话。

因此，每次用户与我公开的集线器以及接收connectionId和用户令牌的端点连接时。当Hub处理请求时，我知道连接是用户认证的。

控制器

[HttpPost]
[Authorize]
[Route("{connectionId}")]
public IActionResult Post(string connectionId)
{
    this.hubConnectionService.AddConnection(connectionId, this.workContext.CurrentUserId);
    return this.Ok();
}

集线器

public override Task OnDisconnectedAsync(Exception exception)
{
    this.hubConnectionService.RemoveConnection(this.Context.ConnectionId);
    return base.OnDisconnectedAsync(exception);
}

SignalR dotnet核心身份验证

2 个答案: