I was banging my head against the wall for the past hour or so wondering why I was falling back to XHR polling when I deployed my Node.js application to Azure. I'm using socket.io and everything looks like it's in order, works locally, etc. It was failing with a WebSocket handshake error.
What I saw in the Chrome developer console was something like:
Error during WebSocket handshake: Unexpected response code: 502
In my Azure Node.js console (
azure site log tail SITENAME), I was seeing
It turns out, this little tidbit from the original Windows Azure blog post on Web Sockets did the trick.
Modify your web.config and add:
<webSocket enabled="false" />
system.webServer configuration. Also, another good point in that blog post is to use SSL, since you get SSL for free with a
Hope this helps someone else out there. This should be added to the official Azure tutorial on using web sockets with Node.js.