node/test/parallel/test-http-slow-headers-keepalive.js

'use strict';

const common = require('../common');
const http = require('http');
const net = require('net');

const headers =
  'GET / HTTP/1.1\r\n' +
  'Host: localhost\r\n' +
  'Connection: keep-alive' +
  'Agent: node\r\n';

let sendCharEvery = 1000;

const server = http.createServer(common.mustCall((req, res) => {
  res.writeHead(200);
  res.end();
}));

// Pass a REAL env variable to shortening up the default
// value which is 40s otherwise this is useful for manual
// testing
if (!process.env.REAL) {
  sendCharEvery = common.platformTimeout(10);
  server.headersTimeout = 2 * sendCharEvery;
}

server.once('timeout', common.mustCall((socket) => {
  socket.destroy();
}));

server.listen(0, () => {
  const client = net.connect(server.address().port);
  client.write(headers);
  // finish the first request
  client.write('\r\n');
  // second request
  client.write(headers);
  client.write('X-CRASH: ');

  const interval = setInterval(() => {
    client.write('a');
  }, sendCharEvery);

  client.resume();

  const onClose = common.mustCall(() => {
    client.removeListener('close', onClose);
    client.removeListener('error', onClose);
    client.removeListener('end', onClose);
    clearInterval(interval);
    server.close();
  });

  client.on('error', onClose);
  client.on('close', onClose);
  client.on('end', onClose);
});