一個檔案理解 Node for Web

helloHtml.js

var http = require('http'),
		fs = require('fs');

function serveStaticFile(res, path, contentType, responseCode) {
	if(!responseCode) responseCode = 200;
	fs.readFile(__dirname + path, function(err, data){
		if(err) {
			res.writeHead(500, {'Content-Type': 'text/plain'});
			res.end('500 - Internal Error');
		} else {
			res.writeHead(responseCode, {'Content-Type': contentType});
			res.end(data);
		}
	});
}

http.createServer(function(req, res){
	var path = req.url.replace(/\/?(?:\?.*)?$/, '').toLowerCase();
	switch(path) {
		case '':
			serveStaticFile(res, '/public/home.html', 'text/html');
			break;
		case '/about':
			serveStaticFile(res, '/public/about.html', 'text/html');
			break;
		case '/img/logo.jpg':
			serveStaticFile(res, '/public/img/logo.jpg', 'image/jpeg');
			break;
		default:
			serveStaticFile(res, '/public/404.html', 'text/html', 404);
			break;
	}
}).listen(3000);

console.log('伺服器開在3000埠，按Ctrl-C終止運行⋯⋯');

helloWorld.js

var http = require('http');

http.createServer(function(req, res){
	var path = req.url.replace(/\/?(?:\?.*)?$/, '').toLowerCase();
	switch(path) {
		case '':
			res.writeHead(200, {'Content-Type': 'text/plain'});
			res.end('Homepage');
			break;
		case '/about':
			res.writeHead(200, {'Content-Type': 'text/plain'});
			res.end('About');
			break;
		default:
			res.writeHead(404, {'Content-Type': 'text/plain'});
			res.end('Not Found');
			break
	}
}).listen(3000);

console.log('Server started on localhost 3000; press Ctrl-C to terminate...');