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On my IIS 7.5, my SignalR application always used long polling. As per my search, IIS 7.5 does not support WebSockets yet.
I hope, I missed some tools or configurations to enable WebSockets in IIS 7.5. Or I didn't?
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- In Control Panel, click Programs and Features, and then click Turn Windows features on or off. Expand Internet Information Services, expand World Wide Web Services, expand Application Development Features, and then select WebSocket Protocol. Click OK. Click Close.
To open a websocket connection, we need to create new WebSocket using the special protocol ws in the url: let socket = new WebSocket("ws://javascript.info"); There's also encrypted wss:// protocol. It's like HTTPS for websockets.
You cannot use WebSocket on IIS 7.5 (in other words on Windows Server 2008 R2 or Windows 7) because it requires HTTP.sys level changes AFAIK. So, you need IIS 8.0 and Windows Server 2012 or Windows 8 combination to leverage WebSocket. Also, IIS Express 8.0 supports WebSockect, too but you cannot still leverage that if you are on an OS which is lower than Windows 8 or Windows Server 2012.
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IIS 8 Express Supports websockets New Features
Windows 7 is considered a Down-Level Operating system and doesn't support Web Sockets. Known Issues and Limitations
Time to upgrade to Windows 8 if you want to support for web-sockets!
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