connect：Connect是Node.js的中间件层

Connect是使用称为“中间件”的“插件”为提供的可扩展HTTP服务器框架。 var connect = require ( 'connect' ) ; var http = require ( 'http' ) ; var app = connect ( ) ; // gzip/deflate outgoing responses var compression = require ( 'compression' ) ; app . use ( compression ( ) ) ; // store session state in browser cookie var cookieSession = require ( 'cookie-session' ) ; app . use ( cookieSession ( { keys : [ 'secret1' , 'secret2' ] } ) ) ; // parse urlencoded request bodies into req.body var bodyParser = require ( 'body-par