express4.x中的链式路由句柄

 var express = require("express");
 var router = express();

 router.get('/', function (req, res) {
     res.render('articles', {titles: '文章页', content: '这是文章页的内容,method==' + req.method});
 })
     .post('/', function (req, res) {
         res.json({msg: "添加文章成功"})
     })
     .put('/', function (req, res) {
         if (req.body.id) {
             res.json({msg: "文章修改成功"})
         }
     });

 module.exports = router;