learning nodejs 2 - connect middleware

學習了connect module

nodejs 的中間件方式

var connect = require('connect');
var server = connect.createServer();

// connect.logger 是一箇中間件
server.use(connect.logger('dev'));

// 值得學習的是 next 方法
server.use(function(req, res, next) {
  if ('/a' == req.url) {
    // here do something
  } else {
    // next is the require chain like java filter china
 next();
  }
});

server.listen(3000);

 

connect 的中間件，還包括：

connect.static // 映射靜態路徑 

// web root path
server.use(connect.static(__dirname + '/resource'));

// path '/images' point to '/path/to/images'
server.use('/images', connect.static('/path/to/images'));

// client side cache
server.use('/js', connect.static('/path/to/bounds', {
    maxAge: 10000000 });

// hidden
server.use(connect.static('/path/to/resources', { 
    hidden: true });

connect.query // 解析GET參數

connect.bodyParser // 解析POST參數

connect.logger // 日誌

connect.cookieParser // 解析cookie

connect.session // session

var server = connect(
  connect.logger('dev'),
  connect.bodyParser(),
  connect.cookieParser(),
  connect.session({secret: 'my app secret'}),
  function(req, res, next) {
     if (req.url == '/images') {
        // todo ... 
     } else {
        next();
     }
  }
);

 

nodejs的代碼真是簡潔啊~