SignalR 2 Websockets with ASP.NET Core on .NET Framework

Question

I have an ASP.NET Core application, running on .NET Framework 4.6.2. I managed to run SignalR 2 by using owin-middleware. The issue is that it uses server events, instead of websockets. Is there any setup that can be done, in order to use websockets?

In Startup.cs I am calling both app.UseWebSockets(); app.UseSignalR2() // custom extension method maps signalR to appbuilder

If specifying only webSockets transport, it doesn't have any errors, but it does not connect.

I have used a similar setup using a ASP.NET MVC project, and it worked as expected, this only reproduces when using ASP.NET Core on .NET Framework.

I found some similar posts, but I was not able to run it using websockets: Using SignalR on an asp.net Core app that targets the full .NET Framework

score 0 · Answer 1 · answered Aug 31 '17 at 21:19

0

This looks like it's missing the UseWebSockets method:

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, IServiceProvider serviceProvider)
{
        app.UseWebSockets();
}

answered Aug 31 '17 at 21:19

Camille Wintz

951
7
8

Do you use IIS as reverse proxy? If yes you also need to activate websockets on it. Also check for http/https mismatches. – Camille Wintz Aug 31 '17 at 21:29
I am using IIS, but since it is working for ASP.NET MVC application, I assume that IIS is not the issue. – Andrei S Sep 01 '17 at 06:47
Do you have the WebSocket protocol enabled for IIS? It's under Windows Features -> IIS -> WWW Services -> App Dev Features. – Joe Pontani Sep 01 '17 at 12:51
Yes, I enabled this. Still, no change. – Andrei S Sep 01 '17 at 16:23

SignalR 2 Websockets with ASP.NET Core on .NET Framework

1 Answers1