node/test/parallel/test-http-client-abort.js

// Copyright Joyent, Inc. and other Node contributors.
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'use strict';
require('../common');
const assert = require('assert');
const http = require('http');

let clientAborts = 0;

const server = http.Server(function(req, res) {
  console.log('Got connection');
  res.writeHead(200);
  res.write('Working on it...');

  // I would expect an error event from req or res that the client aborted
  // before completing the HTTP request / response cycle, or maybe a new
  // event like "aborted" or something.
  req.on('aborted', function() {
    clientAborts++;
    console.log(`Got abort ${clientAborts}`);
    if (clientAborts === N) {
      console.log('All aborts detected, you win.');
      server.close();
    }
  });
});

let responses = 0;
const N = 8;
const requests = [];

server.listen(0, function() {
  console.log('Server listening.');

  for (let i = 0; i < N; i++) {
    console.log(`Making client ${i}`);
    const options = { port: this.address().port, path: `/?id=${i}` };
    const req = http.get(options, function(res) {
      console.log(`Client response code ${res.statusCode}`);

      res.resume();
      if (++responses === N) {
        console.log('All clients connected, destroying.');
        requests.forEach(function(outReq) {
          console.log('abort');
          outReq.abort();
        });
      }
    });

    requests.push(req);
  }
});

process.on('exit', function() {
  assert.strictEqual(N, clientAborts);
});