An Improved Node.js server with default index.htm document and global 404 and 500 error handlers.

server.js

var sys = require("sys"),
	http = require("http"),
	url = require("url"),
	path = require("path"),
	fs = require("fs");
	
//Create the server wrapper
http.createServer(function(request, response) {
	var uri = url.parse(request.url).pathname;
	console.log('URI: ' + uri);
	if (uri.match(/\/$/)) uri = uri + 'index.htm';
	if (uri == '/server.js') throw404();
	var filename = path.join(process.cwd(), uri);
	console.log('File Name: ' + filename)
	// Check if the file exists
	path.exists(filename, function(exists){
		// If it doesn't exist
		if (!exists) throw404();
		fs.readFile(filename, "binary", function(err, file){
			if (err) throw500();
			response.writeHead(200);
			response.write(file, "binary");
			response.end();
		});
	});
	function throw404(){
		response.writeHead(404, {
			"Content-Type": "text/plain"
		});
		response.write("404 Not Found\n");
		response.end();
		return;			
	}
	function throw500(){
		response.writeHead(500, {
			"Content-Type": "text/plain"
		});
		response.write("500 Not Found\n");
		response.end();
		return;
	}
}).listen(8000);

sys.puts("Server running at http://localhost:8000/");