Fully functional web server in 30 lines of code - Cardinal Solutions ALF blog post

server.js

var http = require('http');
var path = require('path');
var fs = require('fs');
var base = __dirname;

http.createServer (function(req, res){
    pathname = base + req.url;
    console.log(pathname);

    path.exists(pathname, function(exists){
        if(!exists){
            res.writeHead(404);
            res.write('404 Bad Request');
            res.end();
        }else{
            res.setHeader('Content-type', 'text/html');
            res.statusCode = 200;
            var file = fs.createReadStream(pathname);
            file.on('open', function(){
                file.pipe(res);
            });
            file.on('error', function(err){
                res.writeHead(404);
                res.write('404 Bad Request');
                res.end();
            })
        }
    })
}).listen('8881');
console.log('Server started: Listening on port 8881');