Very simple Express-like routing for PhantomJS

gistfile1.js

// Do things like:

var app = new Routes();

app.use(Routes.static('../htdocs'));

app.use(function(req, res, next) {
	req.startTime = new Date().getTime();
	next();
});

app.all(/.+/, function(req, res, next) {
	console.log('Here comes a request.');
	next();
});

app.get('/', function(req, res, next) {
	res.send('Hello there.');
})

app.post('/', function(req, res, next) {
	res.send(req.post.name);
});

app.get('/test', function(req, res, next) {
	res.write('What a test.');
	next();
});

app.get('/user/([a-zA-Z0-9]+)', function(req, res, next) {
	res.write('You are user: ' + req.params[0]);
	next();
});

app.get('/nonexistent', function(req, res) {
	res.send(404);
});

app.get('/go_away', function(req, res) {
	res.redirect('/');
});

app.use(function(req, res) {
	console.log(new Date().getTime() - req.startTime);
	res.close();
});

app.listen(8080);

Routes.js

var Routes = (function() {
	var _ = {}, ctor = function(){};
	_.bind = function bind(func, context) {
		var bound, args, slice = Array.prototype.slice;
		args = slice.call(arguments, 2);
		return bound = function() {
			if (!(this instanceof bound)) return func.apply(context, args.concat(slice.call(arguments)));
			ctor.prototype = func.prototype;
			var self = new ctor;
			var result = func.apply(self, args.concat(slice.call(arguments)));
			if (Object(result) === result) return result;
			return self;
		};
	};
	
	var Res = function Res(res) {
		this.headers = res.headers || {};
		this.res = res;
		this.statusCode = res.statusCode;
	};
	Res.prototype.header = function(h, v) {
		if (v) return this.headers[h] = v;
		else return this.headers[h];
	};
	Res.prototype.send = function(body) {
		if (arguments.length == 2) {
			if (typeof body != 'number' && typeof arguments[1] == 'number') {
				this.statusCode = arguments[1];
			} else {
				this.statusCode = body;
				body = arguments[1];
			}
		}

		if (typeof body == 'number') { this.statusCode = body; body = ''; }
		else if (typeof body == 'object') body = JSON.stringify(body);
		
		this.close(body);

		return this;
	};
	Res.prototype.write = function(data) {
		this.res.write(data);
		return this;
	};
	Res.prototype.redirect = function(url) {
		this.header('Location', url);
		this.send(301);
	};
	Res.prototype.close = function(data) {
		this.res.statusCode = this.statusCode;
		this.res.headers = this.headers || {};
		this.write(data);
		this.res.close();
		return this;
	};

	var R = function Routes() {
		this.server = require('webserver').create();
		this.routes = [];
	};
	R.prototype.preRoute = function(req, res) {
		this.router.call(this, req, new Res(res));
	};
	R.prototype.router = function(req, res, i) {
		var i = i || 0;

		for (i; i < this.routes.length; i++) {
			var route = this.routes[i];
			if (route.method == 'ALL' || route.method == req.method) {
				var match = req.url.match(route.route);
				if (match) {
					req.params = match.slice(1);
					try {
						return route.handler.call(this, req, res, _.bind(this.router, this, req, res, ++i));
					} catch (err) {
						console.log(err.stack);
						return res.send(err.stack, 500);
					}
				}
			}
		}

		res.send('Not found', 404);
	};
	R.prototype.addRoute = function(method, route, handler) {
		if (!(route instanceof RegExp)) route = new RegExp("^" + route + "$");
		this.routes.push({method: method, route: route, handler: handler});
	};
	R.prototype.all = function(route, handler) {
		this.addRoute('ALL', route, handler);
	};
	R.prototype.get = function(route, handler) {
		this.addRoute('GET', route, handler);
	};
	R.prototype.post = function(route, handler) {
		this.addRoute('POST', route, handler);
	};
	R.prototype.head = function(route, handler) {
		this.addRoute('HEAD', route, handler);
	};
	R.prototype.put = function(route, handler) {
		this.addRoute('PUT', route, handler);
	};
	R.prototype.delete = function(route, handler) {
		this.addRoute('DELETE', route, handler);
	};
	R.prototype.use = function(handler) {
		this.addRoute('ALL', /.+/, handler);
	};
	R.prototype.listen = function(port) {
		this.server.listen(port, _.bind(this.preRoute, this));
	};

	R.static = function(root) {
		var fs = require('fs'),
			root = fs.absolute(root);

		return function(req, res, next) {
			if (req.method != 'GET') return next();

			var resource = req.url.slice(1),
				path = root + '/' + resource;

			if (resource && fs.isFile(path) && fs.isReadable(path)) {
				var file = fs.read(path);
				res.send(file);
			} else {
				next();
			}
		}
	};

	return R;
})();

if (module && module.exports) module.exports = Routes;

Looks really nice! A lot of meta stuff there with bind etc. Trying to figure out the magic but would like to know what npm module you are using when calling require('webserver')

I have a hard time trying to figure out lines 7 to 12 in Routes.js, are they there to make sure the bound function works regardless if the function was called with new or called directly?

It's not actually an npm module, but a built-in PhantomJS module. http://code.google.com/p/phantomjs/wiki/Interface#WebServer_Module

I pulled the bind function out of underscore.js, and yes, it makes it possible to use the new keyword with a bound function. http://stackoverflow.com/questions/8552908/understanding-the-code-of-bind

Let's get some documentation up in haaaaaaaar!

Bug report:

if we add a route /test, and then request /test?foo=bar. The url(/test?foo=bar) will not match the route: new RegExp("^" + "/test" + "$"), and the req.params will not be set correctly.

//curl -I http://127.0.0.1:3000/test?foo=bar
app.get('/test', function(req, res) {
   //...
}

but in expressjs, the route will work as expected.