如何在Asp.NET核心应用程序的子域下使用SignalR

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;

namespace SubdomainApp
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddSignalR();
        }

        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            app.UseRouting();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapHub<ChatHub>("/chatHub");
            });
        }
    }
}

<script src="/subdomain/chatHub"></script>
<script>
    var connection = new signalR.HubConnectionBuilder().withUrl("/subdomain/chatHub").build();

    connection.on("ReceiveMessage", function (user, message) {
        // 处理接收到的消息
    });

    connection.start().then(function () {
        // 连接成功后的操作
    }).catch(function (error) {
        // 连接失败后的操作
    });

    function sendMessage(user, message) {
        connection.invoke("SendMessage", user, message).catch(function (error) {
            // 发送消息失败后的操作
        });
    }
</script>

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    // ...

    app.Map("/subdomain", subApp =>
    {
        subApp.Use((context, next) =>
        {
            context.Request.PathBase = "/subdomain";
            return next();
        });

        subApp.UseProxy();
    });

    // ...
}