http

• 设置cookie：
  response.setHeader({ 'Set-Cookie': ['key=value', 'key2=value2'] });
• 缓存/header设置：
  http.createServer(req, res) => res.setHeader({}); 或者.writeHead(200,{‘Cache-Control': ‘’})
  会合并，write优先级更高

https：
options={
key: fs.readFileSync(),
cert: .. //证书
}
https.createServer(options, (req, res) => {});