brokerController.js

module.exports = function Broker(broker) {
    // Do your Broker setup...
}

index.js

var SocketCluster = require("socketcluster");

// Create your SocketCluster instance:
var sc = new SocketCluster({
    // ... a few other options ...
    workerCoontroller: require.resolve("./workerController"),
    brokerCoontroller: require.resolve("./brokerController")
});

middlewares.js

module.exports = function Middlewares(app, sc) {

    // /user route...
    app.use("/user/login", function(req, res, next){
        if(req.method.toLowerCase() == "post") {
            // Post logic.
            // The following is pseudo-y code, and just to demonstrate.
            // @var redis : Redis client
            // @var data : The data we'd send back
            redis.get((...), function(res, err){
                if(!! res) {
                    // The record is found, aka. we logged the user in.
                    res.satus(200)
                        .write(data)
                        .end();

                    // We can use the sc variable to interact with the SocketCluster server.
                    // For instance, assuming that .broadcast() would send to all users,
                    // let's telle veryone that this specific user logged in!
                    // The "..." is just to omit the arguments for this demo.
                    sc.broadcast(...)
                }
            });
        }
    });

    // Use a static middleware, like "st".
    app.get("/", require("st")());

}

workerController.js

module.exports = function Worker(worker) {

    var app = require("express")();

    // Get a reference to our raw Node HTTP server
    var httpServer = worker.getHTTPServer();

    // Get a reference to our realtime SocketCluster server
    var scServer = worker.getSCServer();

    // Tell the HTTP Server to handle express:
    httpServer.on('request', app);

    // Attach middlewares
    require("./middlewares")(app, scServer);
    
}