http.ceateServer(requestListener?: http.RequestListener): http.Server

const http = require("http")

const server = http.createServer((req, res) => {
  const [pathname, query] = req.url.split('?')

  // router parser
  if(pathname === '/getData' && req.method === 'GET') {
    res.setHeader('Content-Type', 'text/plain;charset=utf-8')
    res.end(`get请求参数为：${query}`)
  } else if(pathname === '/postData' && req.method === 'POST') {
    let buffer = ''
    req.on('data', (chunk) => {
      buffer += chunk.toString()
    })
    req.on('end',() => {
      res.end(JSON.stringify(buffer))
    })
  }else if(pathname === '/') {
    res.setHeader('Content-Type', 'text/html')
    res.write(`<h1>hello world</h1>`)
    res.end()
  } else {
    res.writeHead(404, {'Content-Type': 'text/plain'})
    res.end('404 NOT FOUND')
  }
})

server.listen(8888);