从零开始学习Node.js

// test02.js
import http from 'http'
import url from 'url'
const parseUrl = url.parse('https://www.baidu.com/news?name=诸葛亮&age=18#helloworld')
console.log(parseUrl)
http.createServer((req, res) => {
    res.writeHead(200, {'Content-Type': 'text/html;charset=utf-8'})
    res.write('你好, hello world!')
    res.end()
}).listen(3000)
console.log('My server is running at http://localhost:3000')

const parseUrl = url.parse('https://www.baidu.com/news?name=诸葛亮&age=18#helloworld', true)
console.log(parseUrl)

const formatUrl = url.format({
    protocol: 'https:',
    slashes: true,
    auth: null,
    host: 'www.baidu.com',
    port: null,
    hostname: 'www.baidu.com',
    hash: '#helloworld',
    search: '?name=诸葛亮&age=18',
    query: 'name=诸葛亮&age=18',
    pathname: '/news',
    path: '/news?name=诸葛亮&age=18',
    href: 'https://www.baidu.com/news?name=诸葛亮&age=18#helloworld'
})
console.log(formatUrl)	 // 输出 https://www.baidu.com/news?name=诸葛亮&age=18#helloworld

const result1 = url.resolve('https://www.baidu.com', 'news')
const result2 = url.resolve('https://www.baidu.com/home', '')
const result3 = url.resolve('https://www.baidu.com/home', 'about')
const result4 = url.resolve('https://www.baidu.com/home/index', 'about')
const result5 = url.resolve('https://www.baidu.com/home/index?name=诸葛亮', 'about/hello')
console.log(result1)
console.log(result2)
console.log(result3)
console.log(result4)
console.log(result5)

import fs from 'fs'
import event from 'events'

const eventEmitter = new event.EventEmitter()

eventEmitter.on('events', data => {
    console.log('收到的数据', data.toString())
})

fs.readFile('static/index.html', (err, data) => {
    eventEmitter.emit('events', data)
})

import path from 'path'
// 获取后缀名
const extName = path.extname('index.html')     // .html