WebSockets Servers

If I have found tutorials about WebSockets, they have only been how to create Client-Side sockets. How can I create WebSocket servers and where can I get information about this (something like in Node.js)?

I don't need done Libraries for WebSockets, I need learn how to create WebS开发者_如何转开发ockets Servers without Libraries for WebSockets.

Thanks for replies anyone!

https://github.com/joyent/node/wiki/modules#ws-ajax

For example this "tutorial" shows a low level WebSocket server, however it would be maybe better to look at source codes of other popular servers like node-websocket-server or specific part of socket.io which deals with the WebSocket transport.

Or you can use an already-made WebSocket server. Like https://socketsbay.com/