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

var common = require('../common');
var assert = require('assert');
var http = require('http');

var clientAborts = 0;

var 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();
    }
  });

  // since there is already clientError, maybe that would be appropriate,
  // since "error" is magical
  req.on("clientError", function () {
    console.log("Got clientError");
  });
});

var responses = 0;
var N = http.Agent.defaultMaxSockets - 1;
var requests = [];

server.listen(common.PORT, function() {
  console.log("Server listening.");

  for (var i = 0; i < N; i++) {
    console.log("Making client " + i);
    var options = { port: common.PORT, path: '/?id=' + i };
    var req = http.get(options, function(res) {
      console.log("Client response code " + res.statusCode);

      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.equal(N, clientAborts);
});