静态服务器

  response.statusCode = 200
  const filePath = path === '/' ? '/index.html' : path  // 默认index.html
  // 识别后缀
  const index = filePath.lastIndexOf('.')
  const suffix = filePath.substring(index)
  const fileType = {
      ".html": "text/html",
      ".js": "text/javascript",
      ".css": "text/css",
      ".json": "text/json",
      ".png": "image/png",
      ".jpg": "image/jpeg"
  }
  response.setHeader('Content-Type',
    `${fileType[suffix] || 'text/html'};charset=utf-8`)
  // 处理错误
  let content
  try{
    content = fs.readFileSync(`./public${filePath}`)
  }catch(error){
    content = "文件不存在"
    response.statusCode = 404
  }
  response.write(content)
  response.end()