Yes indeed, we need to document this somewhere. The following should help you:
- Make sure that your IIS has the websocket component installed. It is installable by checking Control Panel > Programs and Features > Turn Windows features on and off > Internet Information Services > World Wide Web Services > Application Development Features > WebSocket Protocol (and maybe rebooting, I don't remember for sure).
- In Web.config, you need to have the following:
1 2 3 4 5
<configuration>
<appSettings>
<add key="aspnet:UseTaskFriendlySynchronizationContext" value="true" />
</appSettings>
</configuration>Thank you for the answer! I tested quickly, but I didn't quite get it work yet. I'll investigate a bit more, and get back if I still have problems.
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When running my sitelet as a self-hosted server using Microsoft.Owin.Hosting.WebApp and WebSharper.Owin.WebSocket, everything works fine. However, when I switch to using Microsoft.Owin.Host.SystemWeb running under IIS (8.0 & Express), the websocket breaks with the following error:
I have tried tried all sorts of things, but so far I have failed miserably at getting any closer to solving the problem.