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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=1024" />
<title>Node.js在花瓣网的应用</title>
<meta name="description" content="Node.js在花瓣网的应用" />
<meta name="author" content="Zola Zhou" />
<!--<link href="css/font.css" rel="stylesheet" />-->
<link href="css/style.css" rel="stylesheet" />
</head>
<body class="impress-not-supported">
<div class="fallback-message">
<p>Your browser <b>doesn't support the features required</b> by impress.js, so you are presented with a simplified version of this presentation.</p>
<p>For the best experience please use the latest <b>Chrome</b>, <b>Safari</b> or <b>Firefox</b> browser.</p>
</div>
<div id="impress">
<div id="title" class="step" data-x="-5000" data-y="-3500" data-z="-10000" data-scale="3">
<!--<span class="sub">简单介绍</span>-->
<span class="sub">Node.js</span>
<h1 class="g"><span>在花瓣网的应用</span></h1>
<p class="footnote">belltoy<br/>2012.12.22</p>
</div>
<div id="intro" class="step big" data-x="-8520" data-y="-4880" data-scale="13">
<h3>花瓣网介绍</h3>
<!--<img class="reflect" src="img/screenshot_huaban_home.png" style="position: absolute; right: 0; top: 0; height: 355px; width: 500px;" />-->
<img class="reflect" src="img/huaban.com.png" style="position: absolute; right: 0; top: 0; height: 355px; width: 500px;" />
</div>
<div class="step" data-x="-11800" data-y="-3200" data-scale="5">
<q>兴趣图谱</q>
</div>
<div class="step" data-x="-11800" data-y="-2200" data-scale="5">
<q>2011.11.11正式上线</q>
</div>
<div class="step" data-x="-11800" data-y="-1200" data-scale="5">
<q>百万用户，千万PV</q>
</div>
<!-- let's build it -->
<div class="step big" data-x="-100" data-y="1000">
<h1 class="g">Let's build it</h1>
</div>
<!-- 选择语言 -->
<div class="step slide" data-x="5000" data-y="2000" data-rotate="90" data-scale="1">
<h3>选择语言</h3>
<dl>
<dt>首先，要满足快速开发的需求</dt>
<dd>
<ul>
<li>团队熟练程度</li>
<li>敏捷性</li>
<li>库支持</li>
</ul>
</dd>
</dl>
</div>
<!-- Node.js of course... -->
<div class="step big" style="width: 1200px;" data-x="1000" data-y="3000" data-z="-2000" data-rotate="245">
<h2>N<span class="g">o</span>de<span class="g">.JS</span> <span class="r">of course</span></h2>
</div>
<!-- why not php -->
<div id="why-not-php" class="step big" data-x="5000" data-y="1000" data-z="3000" data-rotate="180">
<h1 class="g">Why not <span class="php">PHP</span>?</h1>
</div>
<div class="step" data-x="5100" data-y="700" data-z="3000" data-rotate="205">
<li>不喜欢这个语言</li>
</div>
<div class="step" data-x="5250" data-y="500" data-z="3000" data-rotate="230">
<li>需要调用大量外部服务</li>
</div>
<div class="step" data-x="5480" data-y="400" data-z="3000" data-rotate="255">
<li>不适合写长时间运行的任务</li>
</div>
<!-- why node.js -->
<div id="why-node-js" class="step slide" data-x="5000" data-y="5000" data-z="-5000" data-scale="2">
<h3>Why N<span class="g">o</span>de<span class="g">.JS</span>?</h3>
<ul>
<li><span class="b">J</span>ava<span class="r">S</span>cript Language</li>
<li>V8 engine</li>
<li>Non-blocking IO</li>
<li>Express/Connect/jade/socket.io</li>
<li>我们都是前端工程师</li>
</ul>
</div>
<!-- modules -->
<div id="express" class="step big" style="width: 1200px;" data-x="2000" data-y="4600" data-z="-5000" data-rotate="90">
<h3>Web 框架</h3>
<h1><span class="g">Express</span></h1>
</div>
<div class="step big" data-x="1200" data-y="4600" data-z="-5000" data-rotate="180">
<ul>
<li>小巧灵活</li>
<li>工具丰富</li>
<li>容易调教</li>
</ul>
</div>
<div class="step big" data-x="2700" data-y="6600" data-z="-5000" data-rotate="90">
<h1><span class="b">大量中间件</span></h1>
</div>
<div id="jade" class="step big" data-x="2000" data-y="4600" data-z="-10000" data-rotate="180">
<h3>模板引擎</h3>
<h1><span class="jade">Jade</span></h1>
</div>
<div class="step big" data-x="2000" data-y="4000" data-z="-10000" data-rotate="180" data-rotate-x="30">
<h3 class="g">同时支持</h3>
<h2>浏览器端渲染<br/>服务器端渲染</h2>
</div>
<div class="step slide" data-x="2000" data-y="3200" data-z="-10000" data-rotate="180" data-rotate-x="-30">
<h1 class="g">For what purpose ?</h1>
<ul>
<li>前后统一</li>
<li>减少请求</li>
<li><span class="r">富客户端</span></li>
</ul>
</div>
<div class="step big" data-x="200" data-y="1200" data-z="-5000" data-rotate="360">
<h1 class="r">坑</h1>
</div>
<div class="step slide" data-x="200" data-y="1200" data-z="-15000">
<h1 class="r">Jade 模板引擎使用 with 语句</h1>
</div>
<div class="step slide" data-x="1400" data-y="1200" data-z="-15000">
<pre><code><span class="comment">// with 语句</span>
<span class="kw">var</span> user = { <span class="key">name</span>: <span class="str">'foo'</span> };
<span class="r">with</span> (user) {
<span class="kw">var</span> name = <span class="str">'bar'</span>;
}
console.log(user.name);
<span class="comment">// output is 'bar'</span>
</code></pre>
</div>
<div class="step slide" data-x="2600" data-y="1200" data-z="-15000">
<h1 class="r">with 语句的问题</h1>
<ul>
<li>Consused</li>
<li>Slow</li>
<li>Deprecated</li>
</ul>
</div>
<div class="step slide" data-x="3800" data-y="1200" data-z="-15000">
<h1 class="g">解决办法</h1>
<h4 class="r">不使用 with 语句</h4>
</div>
<div class="step slide" data-x="3800" data-y="1200" data-z="-15000" data-rotate-y="90">
<h1>Jade each 语句</h1>
<span class="r">生成的代码太长</span>
</div>
<div class="step slide" data-x="4800" data-y="1200" data-z="-15000" data-rotate-y="90">
<h1 class="g">解决办法</h1>
<span>去掉用不到的</span>
</div>
<!--<div id="mootools" class="step big" data-x="5500" data-y="5600" data-z="-20000" data-rotate="90">-->
<!--<h3>Thank you, <span class="friend">old friend</span></h3>-->
<!--<h1 class="mootools" alt="mootools">mootools</h1>-->
<!--</div>-->
<!-- huaban app server -->
<div id="app" class="step big" data-x="4500" data-y="6600" data-z="-35000">
<h1><span class="r">花瓣</span><br /> <span class="g">App Server</span></h1>
</div>
<div class="step big" style="width: 1200px;" data-x="5500" data-y="6600" data-z="-35000">
<h1>实现</h1>
<h1> = <span class="modules" style="font-size: .7em;">Modules</span> + <span class="r" style="font-size: .7em;">Services</span></h1>
</div>
<div class="step big" style="width: 1200px;" data-x="5500" data-y="7450" data-z="-35000" data-rotate="90">
<h1><span class="g">Faster</span> than <span class="r">C</span> ?</h1>
</div>
<div id="story" class="step big" data-x="-2300" data-y="7450" data-z="-35000" data-rotate="90">
<h1>A story</h1>
</div>
<div class="step big" data-x="-6300" data-y="7450" data-z="-35000" data-rotate="90">
<span>关于</span>
<h1><span class="mysql-my">My</span><span class="mysql-sql">SQL</span> 客户端</h1>
</div>
<div class="step big" data-x="-9300" data-y="7450" data-z="-35000" data-rotate="90">
<img src="img/a-b.png">
</div>
<div class="step big" data-x="-9600" data-y="7450" data-z="-25000" data-rotate="90">
<img src="img/a-b-c.png">
</div>
<div class="step big" data-x="-9900" data-y="7450" data-z="-15000" data-rotate="90">
<img src="img/a-b-c-d.png">
</div>
<div class="step big" data-x="-10200" data-y="7450" data-z="-5000" data-rotate="90">
<img src="img/bar.png">
</div>
<div class="step big" data-x="-10500" data-y="7450" data-z="5000" data-rotate="90">
<h1>mysql<br/>2.0.0-alpha4</h1>
</div>
<div class="step big" data-x="-10200" data-y="7450" data-z="15000" data-rotate="90">
<h1><span class="g">性能很好</span><br/><span class="r">小心有</span><span class="r">坑</span></h1>
</div>
<div class="step slide" data-x="-9300" data-y="7450" data-z="-45000" data-rotate="90">
<!--<div class="step slide" data-x="-10500" data-y="7800" data-z="5000" data-rotate="160">-->
<pre style="font-size: 36px;"><code><span class="comment" style="font-size: 30px;">// node_modules/mysql/lib/protocol/packets/RowDataPacket.js</span>
<span class="kw">var</span> numberString = parser.<strong class="hl">parseLengthCodedString</strong>();
<span class="rt">return</span> (numberString === <span class="kw">null</span>
|| (field.zeroFill && numberString[0] == "0"))
? <strong class="hl">numberString</strong>
: Number(numberString);
</code>
</pre>
</div>
<div id="npm" class="step big" data-x="-25000" data-y="10000" data-z="-12000">
<h3>Thank you! </h3>
<h1 style="margin-top: 0.4em;">
<img src="img/npm.png" alt="npm" />
</h1>
</div>
<div class="step" style="width: 1200px;" data-x="-25000" data-y="10000" data-z="3000" data-rotate="180">
<ul id="modules">
<li class="underscore">Underscore.js</li>
<li class="qs">qs</li>
<li class="jsdom">jsdom</li>
<li class="jade">jade</li>
<li class="should">should</li>
<li class="async">async</li>
<li class="validator">validator</li>
<li class="seq">Seq</li>
<li class="mocha">mocha</li>
<li class="mysql">mysql</li>
<li class="mysql-pool">mysql-pool</li>
<li class="hiredis">hiredis</li>
<li class="memcached">memcached</li>
<li class="express">Express</li>
<li class="connect">Connect</li>
<li class="tunnel">tunnel</li>
<li class="should">should</li>
<li class="supertest">Supertest</li>
<li class="request">request</li>
</ul>
</div>
<!-- pic storage -->
<div id="storage" class="step slide" data-x="5500" data-y="6000" data-z="-15000">
<h3>图片存储服务</h3>
<ul>
<li>安全、稳定</li>
<li>CDN 加速</li>
<li>伸缩自如</li>
<li>动态缩略图</li>
</ul>
</div>
<div id="upyun" class="step big" data-x="7000" data-y="6000" data-z="-35000">
<h1>又拍<span class="b">云存储</span></h1>
</div>
<div class="step big" data-x="7000" data-y="8000" data-z="-35000" data-rotate="225">
<h1>回调多了<br/>难免有<span class="r">坑</span></h1>
</div>
<div id="callback" class="step slide" style="width: 1200px;" data-x="5000" data-y="2000" data-z="-25000" data-rotate="225">
<h3><span class="y">callback function</span></h3>
<pre style="font-size: 40px;"><span class="comment">// e.g. </span>
<code>User.load(user_id, <span class="kw">function</span>(err, user){
Profile.load(user_id, <span class="kw">function</span>(err, profile){
Pin.loadUserPins(user_id, opts, <span class="kw">function</span>(err, pins){
Board.load(pin.board_id, <span class="kw">function</span>(err, board){
<strong class="comment">// <span class="r">坑</span>爹啊，后面都看不见了</strong>
});
});
});
});
</code>
</pre>
</div>
<div id="seq" class="step big" data-x="36500" data-y="8450" data-z="-35000" data-scale="3">
<h1><span class="y">Seq</span></h1>
</div>
<div class="step big" data-x="36500" data-y="9450" data-z="-35000" data-scale="3" data-rotate-x="-90">
<pre style="font-size: 30px;"><code><span class="kw">var</span> Seq = require('seq');
Seq()
.seq(<span class="kw">function</span>(){
<span class="comment">// do something</span>
Pin.loadUserPins(user_id, opts, <span class="kw">this</span>);
})
.flatten()
.parEach(<span class="num">5</span>, <span class="kw">function</span>(pin){
<span class="comment">// do something in parallel</span>
})
.seq(<span class="kw">function</span>(){
<span class="comment">// do something</span>
})
.catch(<span class="kw">function</span>(err){
<span class="comment">// catch exception</span>
});
</code>
</pre>
</div>
<div class="step big" data-x="36500" data-y="11450" data-z="-35000" data-rotate-x="-180">
<h1>又跳进一个<span class="r">坑</span></h1>
</div>
<div class="step big" data-x="36500" data-y="22450" data-z="-35000">
<h1 class="g">大量消耗 CPU</h1>
</div>
<div id="async" class="step big" data-x="38000" data-y="22450" data-z="-35000" data-rotate-y="40">
<h1 class="g">async</h1>
</div>
<div class="step slide" data-x="38000" data-y="22450" data-z="-37000" data-rotate-y="80">
<h3 class="g">CPU 降了，但是 . . .</h3>
</div>
<div class="step slide" data-x="28000" data-y="14450" data-z="-37000">
<pre style="font-size: 40px;"><code><span class="kw">var</span> async = require(<span class="str">'async'</span>);
async.waterfall([
<span class="kw">function</span>(next){
<span class="comment">// e.g. load user</span>
},
<span class="kw">function</span>(user, next){
<span class="comment">// load something</span>
}
], function(err, result){
<span class="kw">if</span> (err) callback(err);
<span class="comment">// return something</span>
});
</code></pre>
</div>
<div class="step big" data-x="28000" data-y="24450" data-z="-8000">
<h1>还 有 <span class="r">坑</span></h1>
</div>
<div class="step slide" data-x="28000" data-y="28450" data-z="-37000">
<pre style="font-size: 36px;"><code><span class="comment">// async.js</span>
<span class="kw">var</span> args = Array.prototype.<strong class="hl">slice</strong>.call(arguments, <span class="num">1</span>);
<span class="kw">var</span> next = iterator.next();
<span class="kw">if</span> (next) {
args.<strong class="hl">push</strong>(wrapIterator(next));
}
<span class="kw">else</span> {
args.<strong class="hl">push</strong>(callback);
}
async.nextTick(<span class="kw">function</span> () {
iterator.apply(null, args);
});
</code></pre>
</div>
<div class="step slide" data-x="28000" data-y="30450" data-z="-37000">
<pre style="font-size: 40px;"><code><span class="kw">var</span> async = require(<span class="str">'async'</span>);
async.waterfall([
<span class="kw">function</span>(next){
<span class="comment">// e.g. load user</span>
},
<span class="kw">function</span>(<strong class="hl">user</strong>, <strong class="hl">next</strong>){
<span class="comment">// 小心！别踩到</span><span class="r">坑</span><span class="comment">里了</span>
<span class="comment">// user may become next callback</span>
<span class="comment">// next may be undefined</span>
}
], function(err, result){
<span class="comment">// return something</span>
});
</code></pre>
</div>
<div class="step slide" data-x="28000" data-y="32050" data-z="-37000">
<h3>强制规范你的代码</h3>
<pre style="font-size: 40px;"><code><span class="kw">function</span> doSomething(arg, callback) {
<span class="comment">// do something</span>
<span class="kw">if</span> (err) <span class="rt">return</span> callback(err);
<span class="kw">if</span> (some_test) {
callback(<strong class="kw">null</strong>, <strong class="kw">null</strong>);
} <span class="kw">else</span> {
callback(<strong class="kw">null</strong>, result);
}
}
</code></pre>
</div>
<div id="testing" class="step big" data-x="28000" data-y="32050" data-z="-30000">
<h1>测试框架</h1>
<ul>
<li>Mocha</li>
<li>Supertest</li>
<li>PhantomJS</li>
<li>Zombie</li>
</ul>
</div>
<!-- tasks -->
<div id="tasks" class="step slide" data-x="28500" data-y="35000" data-z="-25000" data-rotate="90">
<h3 class="g">耗时操作</h3>
<ul>
<li>Timeline pushing</li>
<li><span class="y">Solr</span> indexing</li>
<li>Batch operation: delete board</li>
<li><span class="r">Weibo</span> sharing</li>
</ul>
</div>
<div class="step big bg" data-x="29500" data-y="35000" data-z="-25000" data-rotate="90">
<h1 class="g">必须从请求中脱离出来</h1>
</div>
<div class="step big bg" data-x="30500" data-y="35000" data-z="-25000" data-rotate="90">
<h1 class="g">要有任务系统</h1>
</div>
<div class="step big" data-x="32450" data-y="38000" data-z="-15000" data-rotate="180">
<h2 class="g">什么样的任务系统</h2>
</div>
<div class="step big" data-x="32750" data-y="38600" data-z="-15000" data-rotate="90">
<h4 class="g">它需要满足：</h4>
</div>
<div class="step" style="width: 700px;" data-x="32600" data-y="38600" data-z="-15000" data-rotate="90">
<li>基于事件/消息</li>
</div>
<div class="step" style="width: 700px;" data-x="32500" data-y="38600" data-z="-15000" data-rotate="90">
<li>工作进程管理</li>
</div>
<div class="step" style="width: 700px;" data-x="32400" data-y="38600" data-z="-15000" data-rotate="90">
<li>容错性</li>
</div>
<div class="step" style="width: 700px;" data-x="32300" data-y="38600" data-z="-15000" data-rotate="90">
<li>消息可持久化</li>
</div>
<div class="step" style="width: 700px;" data-x="32200" data-y="38600" data-z="-15000" data-rotate="90">
<li>Cast / Call</li>
</div>
<div class="step" style="width: 700px;" data-x="32100" data-y="38600" data-z="-15000" data-rotate="90">
<li>分布式的</li>
</div>
<div id="petaline" class="step" data-x="34500" data-y="30500" data-z="-10000" data-rotate="90">
<img src="img/petaline_arch.png" style="float: left;" />
<div style="width: 600px;float: right;">
<ul class="small">
<li><span class="b">Erlang/OTP</span></li>
<li><span class="y">Riak Core</span></li>
<li>N<span class="g">o</span>de<span class="g">.JS</span> worker</li>
<li><span class="r">leveldb</span></li>
</ul>
</div>
</div>
<div id="arch" class="step center" data-x="34500" data-y="31500" data-z="-10000" data-rotate="90" data-rotate-x="-50">
<img src="img/arch_overview.png" />
</div>
<div id="todo" class="step slide" data-x="34500" data-y="32500" data-z="-10000">
<h4 class="g">More things TODO:</h4>
<ul>
<li><span class="redis">Redis</span> cluster</li>
<li>Express Session 改进</li>
<li><span class="petal">Petaline</span> 更多语言、协议支持</li>
<li>完善测试</li>
<li>real-time support</li>
</ul>
</div>
<div class="step big" style="width: 1200px;" data-x="34500" data-y="33500" data-z="-10000">
<h3 style="text-align: center;"><span class="b">J</span>ava<span class="r">S</span>cript 强大，但是也有糟粕</h3>
</div>
<div class="step big" style="width: 1200px;" data-x="34500" data-y="34500" data-z="-10000">
<!--<h1>Join us<br/><span class="g">hr</span>@<span class="r">huaban</span>.com</h1>-->
<h3 style="text-align: center;">N<span class="g">o</span>de<span class="g">.JS</span> 好玩，偶尔也挺<span class="r">坑</span>爹</h3>
</div>
<div id="jobs" class="step big" style="width: 1200px;" data-x="34500" data-y="35500" data-z="-10000">
<h3 style="text-align: center;">Join us! 让我们一起来踩<span class="r">坑</span>吧！</h3>
<h1 style="text-align: center;"><span class="g">hr</span>@<span class="r">huaban</span>.com</h1>
</div>
<div id="thanks" class="step big center" data-x="37000" data-y="30500" data-z="-30000" data-rotate="380" data-scale="4">
<h1>谢谢观看</h1>
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