node强缓存

// index.js
const http = require('http')
const fs = require('fs')
const path = require('path')

const server = http.createServer((req, res) => {

  let filePath = path.resolve(__dirname, req.url === '/' ? `index.html` : '1.jpg')

  res.writeHead(200, {
    'Content-Type': req.url === '/' ? 'text/html; charset=utf-8' : 'image/png',
    'Cache-Control': 'max-age=86400', // 设置缓存缓存一天
  })
  const fileStream = fs.createReadStream(filePath)
  return fileStream.pipe(res)
})

server.on('clientError', (err, socket) => {
  socket.end('HTTP/1.1 400 Bad Request\r\n\r\n')
})

server.listen(8080, () => {
  console.log(`opened server on http://localhost:${server.address().port}`)
})