demonstrates connections not accepted until child starts

0.4.x.js

var net           = require('net'),
    net_binding   = process.binding('net'),
    child_process = require('child_process'),
    http          = require('http'),
    server;

if (process.argv[2]) { // child

    server = http.createServer(function (req, res) {
        res.writeHead(200, {'Content-Type': 'text/plain'});
        res.end('Hello\n');
    });

    var stdin = new net.Stream(0, 'unix')

    stdin.addListener('fd', function (fd) {
        server.listenFD(fd, 'tcp4');
    });

    stdin.resume();

}
else { // parent

    function spawn () {
        var control = net_binding.socketpair();

        var child = child_process.spawn(
            process.argv[0],
            [ __filename, 'x' ],
            { customFds: [ control[0], 1, 2 ] }
        );

        var childIn = new net.Stream(control[1], 'unix');

        return {
            send: function (message, fd) {
                childIn.write(message, 'ascii', fd);
            },
            kill: function () {
                child.kill();
            }
        };
    }

    var fd = net_binding.socket('tcp4');
    net_binding.bind(fd, 4242, '127.0.0.1');
    net_binding.listen(fd, 128);
 
    process.nextTick(function () {
        var child,
            actions = [
            function () {
                console.log('-> making first request');
                http.get({ host: '127.0.0.1', port: 4242, path: '/' }, function (response) {
                    console.log('<- got first response');
                });
            },
            function () {
                console.log('## spawning first child');
                child = spawn();
                child.send('x', fd);
            },
            function () {
                console.log('-> making second request');
                http.get({ host: '127.0.0.1', port: 4242, path: '/' }, function (response) {
                    console.log('<- got second response');
                });
            },
            function () {
                console.log('## killing first child');
                child.kill();
            },
            function () {
                console.log('-> making third request');
                http.get({ host: '127.0.0.1', port: 4242, path: '/' }, function (response) {
                    console.log('<- got third response');
                });
            },
            function () {
                console.log('## spawning second child');
                child = spawn();
                child.send('x', fd);
            },
            function () {
                console.log('-> making forth request');
                http.get({ host: '127.0.0.1', port: 4242, path: '/' }, function (response) {
                    console.log('<- got forth response');
                });
            },
            function () {
                console.log('## killing second child and exiting');
                child.kill();
                process.exit(0);
            }
        ];

        setInterval(function () {
            actions.shift()();
        }, 1000);

    });

};

0.5.x.js

var net           = require('net'),
    child_process = require('child_process'),
    http          = require('http'),
    server;

if (process.argv[2]) { // child

    server = http.createServer(function (req, res) {
        res.writeHead(200, {'Content-Type': 'text/plain'});
        res.end('Hello\n');
    });

    process.on('message', function (message, handle) {
        server.listen(handle);
    });

}
else { // parent

    server = net.createServer();

    server.listen(4242, '127.0.0.1', function () {
        var child,
            actions = [
            function () {
                console.log('-> making first request');
                http.get({ host: '127.0.0.1', port: 4242, path: '/' }, function (response) {
                    console.log('<- got first response');
                });
            },
            function () {
                console.log('## spawning first child');
                child = child_process.fork(__filename, [ 'x' ]);
                child.send('x', server._handle);
            },
            function () {
                console.log('-> making second request');
                http.get({ host: '127.0.0.1', port: 4242, path: '/' }, function (response) {
                    console.log('<- got second response');
                });
            },
            function () {
                console.log('## killing first child');
                child.kill();
            },
            function () {
                console.log('-> making third request');
                http.get({ host: '127.0.0.1', port: 4242, path: '/' }, function (response) {
                    console.log('<- got third response');
                });
            },
            function () {
                console.log('## spawning second child');
                child = child_process.fork(__filename, [ 'x' ]);
                child.send('x', server._handle);
            },
            function () {
                console.log('-> making forth request');
                http.get({ host: '127.0.0.1', port: 4242, path: '/' }, function (response) {
                    console.log('<- got forth response');
                });
            },
            function () {
                console.log('## killing second child and exiting');
                child.kill();
                process.exit(0);
            }
        ];

        setInterval(function () {
            actions.shift()();
        }, 1000);

    });

};