Node 中的 http 模块

import * as http from 'http'

const request = http.request('http://baidu.com', { method: 'GET' }, (res) => {
  console.log(res.statusCode)
  console.log(res.headers)

  let result: string = ''

  res.on('data', (chunk) => {
    result += chunk.toString('utf-8')
    console.log(chunk)
  })

  res.on('end', () => {
    console.log('结束', result)
  })
})

request.end()

import url from 'node:url'
import http from 'node:http'

function handleReq(req) {
  console.log('有请求来了！')
  const urlObj = url.urlToHttpOptions(req.url)
  console.log('请求路径', urlObj)
  console.log('请求方法', req.method)
  console.log('请求头', req.headers)

  let body = ''
  req.on('data', (chunk) => {
    body += chunk.toString('utf-8')
  })

  req.on('end', () => {
    console.log('请求体', body)
  })
}

const server = http.createServer((req, res) => {
  handleReq(req)
  res.setHeader('a', '1')
  res.setHeader('b', '2')
  res.statusCode = 404
  res.write('你好！')
  res.end()
})

server.listen(9527)

server.on('listening', () => {
  console.log('server listen 9527')
})

//静态资源服务器
import fs from 'node:fs'
import path from 'node:path'
import * as http from 'http'

async function getStat(filename) {
  try {
    return await fs.promises.stat(filename)
  } catch {
    return null
  }
}

/**
 * 得到要处理的文件内容
 */
async function getFileContent(url) {
  const urlObj = new URL(url)
  let filename //要处理的文件路径
  filename = path.resolve(__dirname, 'public', urlObj.pathname.substr(1))
  let stat = await getStat(filename)
  if (!stat) {
    //文件不存在
    return null
  } else if (stat.isDirectory()) {
    //文件是一个目录
    filename = path.resolve(__dirname, 'public', urlObj.pathname.substr(1), 'index.html')
    stat = await getStat(filename)
    if (!stat) {
      return null
    } else {
      return await fs.promises.readFile(filename)
    }
  } else {
    return await fs.promises.readFile(filename)
  }
}

async function handler(req, res) {
  const info = await getFileContent(req.url)

  if (info) {
    res.write(info)
  } else {
    res.statusCode = 404
    res.write('Resource is not exist')
  }
  res.end()
}

const server = http.createServer(handler)

server.on('listening', () => {
  console.log('server listen 6000')
})

server.listen(6100)