Node JS Express Routing

Routing 就是处理对一个给定URI的HTTP请求， 处理方式一般是借由我们写好的对数据库操作的helper class(data access object)来获取和更新数据。

Routing 就是接受request请求， 进行一些操作，然后返回response， 这个Routing或者controller是唯一一个部分interacts with the model。

Routing refers to determining how an application responds to a client request to a particular endpoint, which is a URI (or path) and a specific HTTP request method (GET, POST, and so on).

an example of a very basic route

var express = require('express')
var app = express()

// respond with "hello world" when a GET request is made to the homepage
app.get('/', function (req, res) {
  res.send('hello world')
})

// POST method route
app.post('/', function (req, res) {
  res.send('POST request to the homepage')
})

For more router practice, see my GitHub inventory and search CS-546 Lab 4:
https://github.com/HoweZZH/CS546

References:
https://expressjs.com/en/starter/basic-routing.html
https://expressjs.com/en/guide/routing.html