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<!DOCTYPE html>
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<a class="post-title-link" href="/2017/12/08/talk-about-spider-and-anti-spider/" itemprop="url">谈谈爬虫与反爬虫</a></h1>
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<h1 id="前言"><a href="#前言" class="headerlink" title="前言"></a>前言</h1><p>最近同事在群里发了这么一个<a href="https://github.com/xiyouMc/WebHubBot" target="_blank" rel="noopener">爬虫地址</a> (未满18岁慎入)，不得不佩服 Scrapy 的强大，但是这让我想到了另外一个问题，PornHub 可以估计随便爬，但是比如像淘宝/亚马逊的商品信息可是一个公司至关重要的数据，显然舍不得让爬虫随便来爬。这就涉及到<strong>爬虫与反爬虫的策略问题</strong>。<br><img src="/assets/img/js-encryption.png" alt="JS 加密混淆"></p>
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<a class="post-title-link" href="/2017/12/06/php-generator-note/" itemprop="url">PHP Generator 笔记</a></h1>
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<p><img src="/assets/img/generator-note.svg" alt="PHP Generator 笔记"></p>
<blockquote>
<p>图片来源 <a href="https://wpengine.com/try/php7-hosting/" target="_blank" rel="noopener">https://wpengine.com/try/php7-hosting/</a></p>
</blockquote>
<h1 id="序"><a href="#序" class="headerlink" title="序"></a>序</h1><p>先说，标题虽然是《Generator 笔记》，但实际上本文会主要内容会是<code>yield</code>。</p>
<p>以鄙人的拙见，目前大多数 PHPer 对 PHP 的 <code>yield</code> 关键字并不怎么了解，但实际上这却是一块非常值得学习的地方，至少于我而言如此。<br><code>yield</code> 为 PHP 引入了<strong>生成器</strong>，<strong>协程</strong> 等一些复杂概念，导致入门门槛也挺高。</p>
<p>关于学不学<code>yield</code>, 目前，我遇到过以下几类人：<br>
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<h1 id="序"><a href="#序" class="headerlink" title="序"></a>序</h1><p>前天无意看到了这么一篇博文 <a href="http://nathanmarz.com/blog/you-should-blog-even-if-you-have-no-readers.html" target="_blank" rel="noopener">You should blog even if you have no readers</a></p>
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<a class="post-title-link" href="/2017/11/29/learn-regex-in-30-minutes/" itemprop="url">30分钟学正则</a></h1>
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<p><img src="/assets/img/ipv4-regex.svg" alt="IPv4"></p>
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<p>有一些人，遇到一个问题时就想：“我知道，我会使用正则表达式。” 然后他就有两个问题了。<br>–by <strong>Jamie Zawinski</strong></p>
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