I'll try to make a long story short:
I want to call a method on a hub in a web application from a core assembly in my application. Reason being is that I have a number of applications that all eventually call into core and trigger events (think mobile web, admin site, api, etc). I want to notify users of the desktop site of events as they happen, using SignalR.
To spike this, I created a 4-project solution. A core project with the hub proxy. A web app with the hub. Another web app without the hub. And finally a console app.
If I call into core from the console app, and try to send a message to hub clients using the proxy, everything works great. However, if I try to call into core and use the proxy from one of the web apps, the execution hangs at the call to connection.Start():
var connection = new HubConnection("...");
var hub = connection.CreateProxy("Spike.Hub");
connection.Start().Wait();
Is the SignalR.Client stuff not meant to be used from within a web app's app domain? Why does it work as expected in the console app, but not from a web app?
Update: I hooked my spike into the SignalR source and when running from one of the web apps, execution hangs at line 130 of SignalR.Client.Connection. The _syncContext for such a connection is an instance of AspNetSynchronizationContext, and when calling its Post() method, everything stops.