indigojs/examples/helloworld/routers/static.js

IndigoJS is an open source, JavaScript/NodeJS localization framework

'use strict';

var indigo = global.__indigo,
	debug = indigo.debug('indigo:static'),
	fs = require('fs'),
	less = require('less');

module.exports = function(router, app) {

	var base = '/static',
		path = '^' + base;

	app.use(path + '/css/*(.css)$', function(req, res) {
		return res.redirect(req.originalUrl.replace(/\.css$/, '.less'));
	});

	app.use(path + '/css/*(.less)$', function(req, res, next) {

		var filename = req.params[0] + req.params[1],
			lessFile = router.moduleWebDir() + '/default/less/' + filename,
			cache = parseInt(indigo.appconf.get('server:cache')),
			isDev = indigo.appconf.get('environment') === 'dev';

		debug(req.method, lessFile);

		if (fs.existsSync(lessFile)) {
			res.setHeader && res.setHeader('Cache-Control', 'public, max-age=' + 
					(!isNaN(cache) ? cache : 3600)); //or one hour

			fs.readFile(lessFile, function(error, data) {
				less.render(data.toString(), {
						filename: lessFile,
						compress: !isDev
					}, function (error, result) {
						res.set('Content-Type', 'text/css');
						res.write(result.css);
						res.end();
					});
			});
			return;
		}
		next();
	});

	return base;
};