最近在深入学习并争取尽快掌握
Node.js的技术细节，考虑开一篇文章用于记录需要记录下来的
概念、
方法以及
代码实例，方便在实际项目中进行查找。此篇会持续更新，或另开文章讨论更核心、关键的技术问题。

这是一个通过http模块进行客户端和服务器端通信的基础例子，个人觉得很不错，虽然有些地方需要重构一下，先记录下来。

//Client
var http = require('http');
var qs = require('querystring');

function send(theName) {
    http.request({
        host: '127.0.0.1',
        port: 3000,
        url: '/',
        method: 'POST'
    }, function (res) {
        res.setEncoding('utf8');
        res.on('end', function () {
            console.log('\nRequest completed!');
            process.stdout.write('\nyour name:')
        })
    }).end(qs.stringify({name: theName}));
}

process.stdout.write('\nyour name: ');
process.stdin.resume();
process.stdin.setEncoding('utf8');
process.stdin.on('data', function (name) {
    send(name.replace('\n', ''))
});

//Server
var http = require('http');
var qs = require('querystring');

http.createServer(function (req, res) {
    var body = '';
    req.on('data', function (chunk) {
        body += chunk;
    });
    req.on('end', function () {
        res.writeHead(200);
        res.end('Done');
        console.log('\ngot name: ' + qs.parse(body).name + '\n');
    })
}).listen(3000);
console.log('Server is running on the port:3000');

var http = require('http');
var qs = require('querystring');
http.createServer(function (req, res) {
    if ('/' === req.url) {
        res.writeHead(200, {'Content-Type': 'text/html'});
        res.end([
            `<form method="POST" action="/url">
            <h1>My form</h1>
            <fieldset>
                <label>Personal information</label>
                <p>What is your name?</p>
                <input type="text" name="name" placeholder="input your name">
                <p><button>Submit</button></p>
            </fieldset>
        </form>`
        ].join(''));
    } else if ('/url' === req.url && 'POST' === req.method) {
        var body = '';
        req.on('data', function (chunk) {
            body += chunk;
        });
        req.on('end', function () {
            res.writeHead(200, {'Content-Type': 'text/html'});
            res.end('<b>Your name is <b>' + qs.parse(body).name + '</b></p>')
        })
    } else {
        res.writeHead(404);
        res.end('Not Found');
    }
}).listen(3000);
console.log('Server is running on the port:3000');