server.js

/**
 * Express-based HTTP server.
 */
var express = require('express'),
    http = require('http'),
    path = require('path'),
    site = require('./site'),
    portal = require('./portal');


/** middleware helpers */

function renderTemplate (template) {
    return function (req, res) {
       res.render(template); 
    };
};

function addLocals (locals) {
    return function (req, res, next) {
        Object.keys(locals).forEach(function (key) {
            res.locals[key] = locals[key];
        });
        next();
    };
}



var app = express();


/** server configuration */

app.configure(function () {
    app.set('port', process.env.PORT || 3000);
    app.set('views', __dirname + '/views');
    app.set('view engine', 'jade');
    app.use(express.favicon(__dirname + '/public/favicon.ico'));
    app.use(express.logger('dev'));
    app.use(express.bodyParser());
    app.use(express.methodOverride());
    app.use(app.router);
    app.use(express.static(path.join(__dirname, 'public')));
    app.use(express.errorHandler());
});


/** routing */

portal.loadSiteSetup(function (siteSetup) {
    app.get('*', site.loadNavItems(), function (req, res, next) {
        res.locals.siteSetup = siteSetup;
        next();
    });

    app.get('/',
        portal.loadBlogEntries(),
        renderTemplate('index')
    );

    app.get('/dogs/:urlTitle',
        portal.loadBlogEntryByUrlTitle(),
        renderTemplate('blog-entry')
    );

    app.get('/site-banner',
        portal.sendImage(siteSetup.banner)
    );

    app.get('/dog-image/:imgId',
        portal.sendBlogImage()
    );

    app.get('/dog-image/:size/:imgId',
        portal.sendResizedBlogImage()
    );

    http.createServer(app).listen(app.get('port'), function () {
        console.log("Express server listening on port " + app.get('port'));
    });
});