SignalR无法建立SSL连接。

openssl s_client -connect yourdomain.com:443

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }
    else
    {
        app.UseHttpsRedirection();
    }

    app.UseRouting();

    app.UseEndpoints(endpoints =>
    {
        endpoints.MapHub<YourHub>("/yourhub");
    });
}

const connection = new signalR.HubConnectionBuilder()
    .withUrl("wss://yourdomain.com/yourhub")
    .build();

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

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            app.UseHttpsRedirection();
        }

        app.UseRouting();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapHub<YourHub>("/yourhub");
        });
    }
}

const connection = new signalR.HubConnectionBuilder()
    .withUrl("wss://yourdomain.com/yourhub")
    .build();

connection.on("ReceiveMessage", (message) => {
    console.log(message);
});

connection.start().then(() => {
    console.log("SignalR Connected.");
}).catch(err => {
    console.error(err);
});