SignalR version compatability (StatusCode: 405 

Question

I'm having issues with a SignalR project I'm currently working on. I'm trying to build a server using .Net Core, and a client using traditional .Net (framework 4.6.1). However the server and client don't seem to be compatible.

The last issue I've run into is a StatusCode: 405, ReasonPhrase: 'Method Not Allowed'. I found an answer on GitHub that states that there are many breaking changes between versions.

Looking at the NuGet package versions available, I get even more confused. for the .Net Core server I'm using 1.0.0-preview1-final. There's also a 1.0.0-alpha2-final available, but I have no clue if 'alpha' is newer or older than 'preview'.

On the client side I was using version 2.2.2, and there's a whole range of versions to choose from, I tried the oldest and latest, but both versions give me the same "method not allowed" error.

The error is on the client side, on the server side, my breakpoints are not even hit, so it could be an Owin/iis issue as well.

Is there any chart out there that can map SignalR clients and server version compatability? I guess that would be a great step moving forward.

Answer 1

You can't mix the .NET Core 1.x with the older client (1.x or 2.x). You will need to decide which is the best option for you but you need to implement the same compatible version across CLIENT and SERVER.

Check the link for more details but essentially:

What’s Changed?

We added a number of new features to SignalR for ASP.NET Core but we also decided to remove support for some of the existing features or change how they work. One of the consequences of this is that SignalR for ASP.NET Core is not compatible with previous versions of SignalR. This means that you cannot use the old server with the new clients or the old clients with the new server.