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Sharing session state in Node.js between your HTTP server and websockets server

At first, sharing your session state between your Node.js HTTP server and websockets server might seem difficult. However, if you're using Express and NowJS (or the technologies they're built on, Connect and Socket.IO, respectively), most of the work has already been done for you -- it's just a matter of connecting the right pieces together. An example follows, written in Coffeescript.