Node.js入門 勉強会(2ndシーズン 1回目) 課題

課題1

var net = require('net');

var host = '127.0.0.1';
var port = 12345;

var server = net.createServer();
server.maxConnections = 1;

server.on('connection', function(socket) {
    console.log('server : connection start');
    socket.end();
    server.close();
});
server.on('close', function() {
    console.log('server : server closed.');
});
server.listen(port, host, function() {
    var addr = server.address();
    console.log('server : listening start on server - ' + addr.address + ':' + addr.port);

    var client = net.connect({host:host, port:port});
    client.on('error', function(e) {
        console.error('client : connection failed - ' + host + ':' + port);
        console.log(e.message);
    });
    client.on('connect', function() {
        console.log('client : connected - ' + host + ':' + port);
    });
    client.on('end', function(had_error) {
        console.log('client : connection end - ' + host + ':' + port);
    });
    client.on('close', function() {
        console.log('client : client closed');
    });
});

課題2

var net = require('net');

var startTime = new Date();
var host = '127.0.0.1';
var port = 12345;

var MAX_COUNT = 1000;
var MAX_CONNECTION = 10;

var server = net.createServer();
server.maxConnections = MAX_CONNECTION;

var serverCount = 0;
server.on('connection', function(socket) {
    serverCount++;
    console.log('server : connection start : ' + serverCount);

    if (serverCount === MAX_COUNT) {
        server.close();
    }
    socket.end();
    socket.writable = socket.readable = false;
    //socket.destroy();
});
server.on('close', function() {
    console.log('server : server closed.');
    var endTime = new Date();
    console.log((endTime - startTime) + 'ms.');
});

var clientCount = 0;
function createClient() {
    if (clientCount >= MAX_COUNT) return;
    var client = net.connect({host:host, port:port});
    clientCount++;
    client.on('error', function(e) {
        console.error('client : connection failed - ' + host + ':' + port);
        console.log(e.message);
    });
    client.on('connect', function() {
        //console.log('client : connected - ' + host + ':' + port);
    });
    client.on('end', function() {
        //console.log('client : connection end - ' + host + ':' + port);
    });
    client.on('close', function(had_error) {
        //console.log('client : client closed' + ':' + had_error);
        createClient();
    });
};

server.listen(port, host, function() {
    var addr = server.address();
    console.log('server : listening start on server - ' + addr.address + ':' + addr.port);
    for (var i = 0; i < MAX_CONNECTION; i++) {
        createClient();
    }
});