node/test/simple/test-http-many-keep-alive-connections.js

// Copyright Joyent, Inc. and other Node contributors.
//
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// following conditions:
//
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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var common = require('../common');
var assert = require('assert');
var http = require('http');

var expected = 10000;
var responses = 0;
var requests = 0;
var connection;

var server = http.Server(function(req, res) {
  requests++;
  assert.equal(req.connection, connection);
  res.writeHead(200);
  res.end("hello world\n");
});

server.once('connection', function(c) {
  connection = c;
});

server.listen(common.PORT, function() {
  var callee = arguments.callee;
  var request = http.get({
    port: common.PORT,
    path: '/',
    headers: {
      'Connection': 'Keep-alive'
    }
  }, function(res) {
    res.on('end', function() {
      if (++responses < expected) {
        callee();
      } else {
        request.agent.sockets.forEach(function(socket) {
          socket.end();
        });
        server.close();
      }
    });
  }).on('error', function(e) {
    console.log(e.message);
    process.exit(1);
  });
  request.agent.maxSockets = 1;
});

process.on('exit', function() {
  assert.equal(expected, responses);
  assert.equal(expected, requests);
});