SignalR Negotiate 404

Question

I am using SignalR 2.0. Everything works fine when running locally on my VS 2012. But when I publish the site on IIS, it breaks. The site loads but one of the scripts returns 404 Not Found. The script is something like.

https://example.com/signalr/negotiate?xxx

This path doesn't exist indeed. The correct path should be:

https://example.com/private/signalr/negotiate?xxx

Note the part in bold.

Inside the WebSite (https://example.com/) I have another Application (https://example.com/private/). This one is using SignalR.

This seems like a bug in SignalR since the signalr/hubs path is accessible from my private site.

Answer 1

I had a similar problem. Here is the documentation for configuring the /signalr URL.

However, my solution differed from the docs. Instead of changing the standard app.MapSignalR(), I changed my client code to use /MyApp/signalr. Here is the code where "MyApp" is the virtual directory of my web application.

        var connection = $.hubConnection('/MyApp/signalr', {useDefaultPath: false});         var changesHub = connection.createHubProxy('changesHub');          changesHub.on('userCountChanged', function (count) {             $('#user-count').text(count);         });          connection.start().done(function () {             console.log('Hub has started');             changesHub.invoke('subscribeToChanges', user.id);         }); 

I tried the other way around (change the MapSignalR to the /signalr path) but this did not work and the negotiation was still routed to /MyApp/signalr/negotiate.

Answer 2

I had the same problem, with an application running in the IIS Default Web Site.
All the Microsoft examples show the hub url with a starting \, and I had copied those examples. But this meant that the signalr routing was from the Default Web Site rather than the application. Removing the leading \ solved it.

So I used endpoints in Startup.cs like:

endpoints.MapHub<MyHub>("myHub"); 

and hub connections in Javascript like:

var connection = new signalR.HubConnectionBuilder().withUrl("myHub").build();