Adding CORS, a Repo about nowin

[Bobris]

Hi Sam,

I was not able to build it without making a lot of fixes in your code. And after that worked without problems. So I don't know where exactly your problem is.
I also commited Cors sample into Nowin. So you can test it on also on my code if it works for you.
Just get latest Nowin source, start "NowinSample" and go to localhost:9999/signalr.html. (NowinSample now starts 2 identical webservers on ports 8888 and 9999, and client always connect to 8888, so it tests Cors)

[Bobris]

I forget to mention in latest SignalR unfortunately stopped working WebSocket connection, so it fallback to long-pooling. I am trying to find out why with SignalR guys.

[samcov]

Interesting, I'll have to look at the code, because everything worked with no CORS support, but I'll take your word for it.

Strange that it's not working with the latest SignalR(which I'm not using yet), but I'm sure David will be able to help there.

I'll get back to you once I look at the code, and a HUGE thanks!

[Bobris]

Someone already found that problem with Owin and Websockets in latest SignalR before me see SignalR/SignalR#2720

[samcov]

Ok, I tested the code, and it works for CORS! I added my ASP.Net project, and if works!

What I discovered is that it fails to work for SignalR 1.x, but works fine for 2.x, with the exception that everything falls back to longpolling(bummer).

Then I went to your referenced SignalR issue, and IMO, the fix sounds like it may take some time!

I also noticed that you used newer versions of the libraries than I did, so maybe something is working better now, because the code didn't really change.

Anyways, thanks a lot for looking into this and making it a part of NoWin, which is really a great thing to happen, and much needed for SignalR!