Callback of ClientRequest.prototype.end

index.js

const http = require('http');

const server = http.createServer((req, res) => {
  console.log('[server] request');
  setTimeout(() => {
    res.end('hello');
    console.log('[server] response');
  }, 3000);
});
server.listen(3000, () => {
  startClient();
});

function startClient() {
  const req = http.request({
    hostname: '127.0.0.1',
    port: 3000,
  });
  req.on('response', (res) => {
    console.log('[client] response');
    res.on('end', () => {
      console.log('[client] response end');
    });
    res.resume();
    server.close(() => {
      console.log('[client] server close');
    });
  });
  req.end(() => {
    console.log('[client] request finish');
  });
  console.log('[client] request start');
}

[client] request start
[client] request finish
[server] request
[server] response
[client] response
[client] server close
[client] response end