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nodeJS實現簡單網頁爬蟲功能的實例(分享)

發布時間:2020-10-16 12:25:07 來源:腳本之家 閱讀:232 作者:jingxian 欄目:web開發

本文將使用nodeJS實現一個簡單的網頁爬蟲功能

網頁源碼

使用http.get()方法獲取網頁源碼,以hao123網站的頭條頁面為例

http://tuijian.hao123.com/hotrank

var http = require('http');
http.get('http://tuijian.hao123.com/hotrank',function(res){
 var data = '';
 res.on('data',function(chunk){
  data += chunk;
 });
 res.on('end',function(){
  console.log(data);
 })
});

獲得的結果如下所示:

<!DOCTYPE html><html lang="zh_CN" bigrender="fe:widget/js/lib/bigRender.js">
<head><noscript><meta http-equiv="refresh" content="0; URL='/tuijian/hotrank?__noscript__-=1'" /></noscript>

<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
<meta name="referrer" content="always">







<meta name="baidu-site-verification" content="cCHudceyEP" />
<meta name="baidu_union_verify" content="d7d644c8a5cb51b46c900d802d906116">
<meta name="keywords" content="頭條,新聞,推薦,國內,國際,本地,財經,軍事,娛樂,體育,社會,汽車,網站,新聞導航,今日頭條,頭條新聞,最新新聞,2017最新新聞,新聞名站,新聞大全,新聞門戶" />
<meta name="description" content="hao123新聞頻道,聚合全網最新的新聞,最熱點的新聞,實時新聞熱搜詞,熱門新聞報刊;更有軍事新聞,娛樂新聞,體育新聞,圖片新聞,汽車新聞,女性新聞,財經新聞,國內新聞,國際新聞等分類新聞" />


<title>熱點排行榜-頭條新聞-hao123新聞導航_hao123上網導航</title>




<link rel="shortcut icon"  rel="external nofollow" />











<script>
  
   window.pageId = window.pageId || "hao123-xinwen-tuijian-hotrank";
   window.pageVP = window.pageVP || "hao123-xinwen-tuijian-hotrank";
  </script>
<!--[if lt IE 7]>
<script src="http://s0.hao123img.com/res/js/common/dd_belatedpng.min.js"></script>
<script>
    DD_belatedPNG.fix('#channelTitle');
   </script>
<![endif]-->
<script>window.HAO=window.HAO||{};window.HAO.https = false;window.HAO.httpsTrans = function(url){return url};</script>




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height="80"/></div></div><a href="" data-hook=" rel="external nofollow" setHome" title="" target="_blank" class="home"><i></i></a></div></div></div><div class="nav" id="normalNav"><div id="fixedNav"><div class="nav-container clearfix"><div class="v2-nav "><ul class="clearfix"><li ><a  rel="external nofollow" title="頭條" >頭條</a></li><li ><a  rel="external nofollow" title="娛樂" >娛樂</a></li><li ><a  rel="external nofollow" title="體育" >體育</a></li><li ><a  rel="external nofollow" title="財經" >財經</a></li><li ><a  rel="external nofollow" title="軍事" >軍事</a></li><li ><a  rel="external nofollow" title="國內" >國內</a></li><li ><a  rel="external nofollow" title="國際" >國際</a></li><li ><a  rel="external nofollow" title="歷史" >歷史</a></li><li ><a  rel="external nofollow" title="科技" >科技</a></li><li ><a  rel="external nofollow" title="汽車" >汽車</a></li><li ><a  rel="external nofollow" title="教育" >教育</a></li><li ><a  rel="external nofollow" title="游戲" >游戲</a></li><li ><a  rel="external nofollow" title="房產" 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nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank point-rank-top3">3</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">曝周杰倫青澀舊照</a></span><span class="point-state point-state-fall"></span><span class="point-index">1457</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">4</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">老頭公交強吻女孩</a></span><span class="point-state point-state-rise"></span><span class="point-index">103307</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">5</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">王傳君戀情曝光</a></span><span class="point-state point-state-fall"></span><span class="point-index">26616</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">6</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">杭州現奇葩窗口</a></span><span class="point-state point-state-rise"></span><span class="point-index">26837</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">7</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">忘帶全班準考證</a></span><span class="point-state point-state-fall"></span><span class="point-index">125127</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">8</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">未成年持械拍網紅</a></span><span class="point-state point-state-fall"></span><span class="point-index">1672</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">9</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">9秒揍兒子8拳</a></span><span class="point-state point-state-rise"></span><span class="point-index">93193</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">10</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">戴耳機穿軌道被撞</a></span><span class="point-state point-state-rise"></span><span class="point-index">195745</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div></div></div></div></div><div class="top-wrap"><div class="top top-blue" monkey="jr"><h3 class="title">今日熱點</h3><div class="points"><div class="point-hd clearfix"><span class="point-rank">排名</span><span class="point-title">關鍵詞</span><span class="point-index">搜索指數</span></div><div class="point-bd"><div class="point clearfix"><span class="point-rank point-rank-top3">1</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">北京回龍觀大火</a></span><span class="point-state point-state-rise"></span><span class="point-index">174225</span><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank point-rank-top3">2</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">選美冠軍車禍身亡</a></span><span class="point-state point-state-rise"></span><span class="point-index">172447</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank point-rank-top3">3</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">2017高考</a></span><span class="point-state point-state-rise"></span><span class="point-index">136806</span><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">4</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">成都老火鍋店被查</a></span><span class="point-state point-state-rise"></span><span class="point-index">121729</span><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">5</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">陳浩民嬌妻秀身材</a></span><span class="point-state point-state-rise"></span><span class="point-index">115877</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">6</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">海邊直播發現浮尸</a></span><span class="point-state point-state-fall"></span><span class="point-index">86157</span><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">7</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">曝印小天遭妻騙婚</a></span><span class="point-state point-state-fall"></span><span class="point-index">83749</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">8</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">蘋果開發者大會</a></span><span class="point-state point-state-rise"></span><span class="point-index">78140</span><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">9</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">6萬斤魚缺氧死亡</a></span><span class="point-state point-state-rise"></span><span class="point-index">68984</span><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">10</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">安以軒夏威夷大婚</a></span><span class="point-state point-state-rise"></span><span class="point-index">56675</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div></div></div></div></div><div class="top-wrap"><div class="top top-yellow" monkey="ms"><h3 class="title">民生熱點</h3><div class="points"><div class="point-hd clearfix"><span class="point-rank">排名</span><span class="point-title">關鍵詞</span><span class="point-index">搜索指數</span></div><div class="point-bd"><div class="point clearfix"><span class="point-rank point-rank-top3">1</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">北京回龍觀大火</a></span><span class="point-state point-state-rise"></span><span class="point-index">174225</span><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank point-rank-top3">2</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">2017高考</a></span><span class="point-state point-state-rise"></span><span class="point-index">136806</span><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank point-rank-top3">3</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">成都老火鍋店被查</a></span><span class="point-state point-state-rise"></span><span class="point-index">121729</span><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">4</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">海邊直播發現浮尸</a></span><span class="point-state point-state-fall"></span><span class="point-index">86157</span><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">5</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">蘋果開發者大會</a></span><span class="point-state point-state-rise"></span><span class="point-index">78140</span><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">6</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">6萬斤魚缺氧死亡</a></span><span class="point-state point-state-rise"></span><span class="point-index">68984</span><a  rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">7</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">北控外援訓練猝死</a></span><span class="point-state point-state-rise"></span><span class="point-index">50687</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">8</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">武漢男子裸體捅人</a></span><span class="point-state point-state-fall"></span><span class="point-index">45810</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">9</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">多國與卡塔爾斷交</a></span><span class="point-state point-state-fall"></span><span class="point-index">44475</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">10</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">美駐華外交官辭職</a></span><span class="point-state point-state-rise"></span><span class="point-index">44394</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div></div></div></div></div><div class="top-wrap"><div class="top first-col" monkey="dy"><h3 class="title">電影</h3><div class="points"><div class="point-hd clearfix"><span class="point-rank">排名</span><span class="point-title">關鍵詞</span><span class="point-index">搜索指數</span></div><div class="point-bd"><div class="point clearfix"><span class="point-rank point-rank-top3">1</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">神奇女俠</a></span><span class="point-state point-state-fall"></span><span class="point-index">40981</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank point-rank-top3">2</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">異星覺醒</a></span><span class="point-state point-state-fall"></span><span class="point-index">15245</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank point-rank-top3">3</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">新木乃伊</a></span><span class="point-state point-state-rise"></span><span class="point-index">7183</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">4</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">中國推銷員</a></span><span class="point-state point-state-rise"></span><span class="point-index">5890</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">5</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">蕩寇風云</a></span><span class="point-state point-state-fall"></span><span class="point-index">3006</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">6</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">異獸來襲</a></span><span class="point-state point-state-fall"></span><span class="point-index">2566</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">7</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">李雷和韓梅梅</a></span><span class="point-state point-state-rise"></span><span class="point-index">1636</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">8</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">北極星</a></span><span class="point-state point-state-fall"></span><span class="point-index">1139</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">9</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">美好的意外</a></span><span class="point-state point-state-fall"></span><span class="point-index">971</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">10</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">夏天19歲的肖像</a></span><span class="point-state point-state-rise"></span><span class="point-index">783</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div></div></div></div></div><div class="top-wrap"><div class="top top-blue" monkey="dsj"><h3 class="title">電視劇</h3><div class="points"><div class="point-hd clearfix"><span class="point-rank">排名</span><span class="point-title">關鍵詞</span><span class="point-index">搜索指數</span></div><div class="point-bd"><div class="point clearfix"><span class="point-rank point-rank-top3">1</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">龍珠傳奇</a></span><span class="point-state point-state-fair"></span><span class="point-index">999788</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank point-rank-top3">2</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">楚喬傳</a></span><span class="point-state point-state-rise"></span><span class="point-index">538848</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank point-rank-top3">3</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">歡樂頌2</a></span><span class="point-state point-state-fall"></span><span class="point-index">257015</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">4</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">歡樂頌</a></span><span class="point-state point-state-fall"></span><span class="point-index">176799</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">5</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">職場是個技術活</a></span><span class="point-state point-state-rise"></span><span class="point-index">73102</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">6</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">擇天記</a></span><span class="point-state point-state-fall"></span><span class="point-index">67290</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">7</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">美食大冒險</a></span><span class="point-state point-state-rise"></span><span class="point-index">61792</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">8</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">廢柴兄弟</a></span><span class="point-state point-state-rise"></span><span class="point-index">50419</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">9</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">人民的名義</a></span><span class="point-state point-state-fall"></span><span class="point-index">46353</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">10</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">三生三世十里桃花</a></span><span class="point-state point-state-rise"></span><span class="point-index">24386</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div></div></div></div></div><div class="top-wrap"><div class="top top-yellow" monkey="zy"><h3 class="title">綜藝</h3><div class="points"><div class="point-hd clearfix"><span class="point-rank">排名</span><span class="point-title">關鍵詞</span><span class="point-index">搜索指數</span></div><div class="point-bd"><div class="point clearfix"><span class="point-rank point-rank-top3">1</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">變形計</a></span><span class="point-state point-state-fall"></span><span class="point-index">223319</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank point-rank-top3">2</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">來吧冠軍</a></span><span class="point-state point-state-fall"></span><span class="point-index">151641</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank point-rank-top3">3</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">拜托了冰箱</a></span><span class="point-state point-state-rise"></span><span class="point-index">149596</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">4</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">昆侖決</a></span><span class="point-state point-state-fall"></span><span class="point-index">139633</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">5</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">天生是優我</a></span><span class="point-state point-state-fall"></span><span class="point-index">124472</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">6</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">姐姐好餓</a></span><span class="point-state point-state-rise"></span><span class="point-index">99619</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">7</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">腦力男人時代</a></span><span class="point-state point-state-fall"></span><span class="point-index">68735</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">8</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">奔跑吧兄弟</a></span><span class="point-state point-state-fall"></span><span class="point-index">61903</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">9</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">我想和你唱</a></span><span class="point-state point-state-rise"></span><span class="point-index">59249</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div><div class="point clearfix"><span class="point-rank">10</span><span class="point-title"><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-title-link">玫瑰之旅</a></span><span class="point-state point-state-rise"></span><span class="point-index">50425</span><a  rel="external nofollow" rel="external nofollow" target="_blank" class="point-detail"></a></div></div></div></div></div></div></div></div>

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篩選數據

以網頁中的綜藝熱點部分

nodeJS實現簡單網頁爬蟲功能的實例(分享)

相關源代碼如下

nodeJS實現簡單網頁爬蟲功能的實例(分享)

  通過分析可知,‘綜藝'模塊與其他模塊都位于<div class="top-wrap">中,其中,綜藝模塊的內層div的monkey='zy',綜藝模塊的10條綜藝節目的信息都位于<div class="poinr clearfix">中,綜藝節目的名稱位于<span class="point-title">中

cheerio

我們怎么從源代碼中獲取到有用的數據呢?首先,nodeJS不支持document對象。如果要使用笨辦法,只能使用正則表達式來處理

cheerio 是nodejs特別為服務端定制的,能夠快速靈活的對JQuery核心進行實現。它工作于DOM模型上,且解析、操作、呈送都很高效

【安裝】

nodeJS實現簡單網頁爬蟲功能的實例(分享)

【使用】

它的使用方法和jQuery相當類似,上手非常容易。以獲取綜藝熱度前10名的節目名稱為例

var http = require('http');
var cheerio = require('cheerio');
http.get('http://tuijian.hao123.com/hotrank',function(res){
 var data = '';
 res.on('data',function(chunk){
  data += chunk;
 });
 res.on('end',function(){
  filter(data);
 })
});
function filter(data){
 //保存搜索量前10的綜藝節目標題
 var result = [];
 //將頁面源代碼轉換為$對象
 var $ = cheerio.load(data);
 //查找每個綜藝節目標題的外層div
 var temp_arr = $('[monkey = "zy"]').find('.point-bd').find('.point-title');
 //將綜藝節目標題依次保存到結果數組中
 temp_arr.each(function(index,item){
  result.push($(item).text());
 })
 //[ '變形計','來吧冠軍','拜托了冰箱','昆侖決','天生是優我','姐姐好餓','腦力男人時代','奔跑吧兄弟','我想和你唱','玫瑰之旅' ]
 console.log(result);
}

爬蟲代碼

下面將hao123網頁中的'實時熱點'、'今日熱點'、'民生熱點'、'電影'、'電視劇'、'綜藝'這6部分的排名爬下來,分別到對象名為'result'中的數組中,分別命令為'ss'、'jr'、'ms'、'dy'、'dsj'、'zy'

nodeJS實現簡單網頁爬蟲功能的實例(分享)

【代碼如下】

var http = require('http');
var cheerio = require('cheerio');
http.get('http://tuijian.hao123.com/hotrank',function(res){
 var data = '';
 res.on('data',function(chunk){
  data += chunk;
 });
 res.on('end',function(){
  filter(data);
 })
});
function filter(data){
 //保存各部分搜索量前10的名稱
 //對象名為榜單名,如'實時熱點'
 //對象內容為10個標題名稱組成的數組
 var result = {};
 //將頁面源代碼轉換為$對象
 var $ = cheerio.load(data);
 //查找'實時熱點'、'今日熱點'、'民生熱點'、'電影'、'電視劇'、'綜藝'這6個榜單所在的div
 var temp_div = $('.top-wrap');

 //保存榜單名稱
 var temp_title = [];

 temp_div.each(function(index,item){
  //查找榜單名,并保存到temp_title文件夾中
  temp_title.push($(item).find('h3').text());

  //查找每類下每個標題的外層div
  var temp_arr = $(item).find('.point-bd').find('.point-title');

  //將result下的每個榜單初始化為一個數組
  var innerResult = result[temp_title[index]] = [];

  //將節目標題依次保存到相應榜單的數組中
  temp_arr.each(function(_index,_item){
   innerResult.push($(_item).text())
  })
 })
 console.log(result);
}

【結果如下】

{ '實時熱點': 
 [ '美國逮捕女斯諾登',
  '成都隱秘母乳買賣',
  '曝周杰倫青澀舊照',
  '老頭公交強吻女孩',
  '王傳君戀情曝光',
  '杭州現奇葩窗口',
  '忘帶全班準考證',
  '未成年持械拍網紅',
  '9秒揍兒子8拳',
  '戴耳機穿軌道被撞' ],
 '今日熱點': 
 [ '北京回龍觀大火',
  '選美冠軍車禍身亡',
  '2017高考',
  '成都老火鍋店被查',
  '陳浩民嬌妻秀身材',
  '海邊直播發現浮尸',
  '曝印小天遭妻騙婚',
  '蘋果開發者大會',
  '6萬斤魚缺氧死亡',
  '安以軒夏威夷大婚' ],
 '民生熱點': 
 [ '北京回龍觀大火',
  '2017高考',
  '成都老火鍋店被查',
  '海邊直播發現浮尸',
  '蘋果開發者大會',
  '6萬斤魚缺氧死亡',
  '北控外援訓練猝死',
  '武漢男子裸體捅人',
  '多國與卡塔爾斷交',
  '美駐華外交官辭職' ],
 '電影': 
 [ '神奇女俠',
  '異星覺醒',
  '新木乃伊',
  '中國推銷員',
  '蕩寇風云',
  '異獸來襲',
  '李雷和韓梅梅',
  '北極星',
  '美好的意外',
  '夏天19歲的肖像' ],
 '電視劇': 
 [ '龍珠傳奇',
  '楚喬傳',
  '歡樂頌2',
  '歡樂頌',
  '職場是個技術活',
  '擇天記',
  '美食大冒險',
  '廢柴兄弟',
  '人民的名義',
  '三生三世十里桃花' ],
 '綜藝': 
 [ '變形計',
  '來吧冠軍',
  '拜托了冰箱',
  '昆侖決',
  '天生是優我',
  '姐姐好餓',
  '腦力男人時代',
  '奔跑吧兄弟',
  '我想和你唱',
  '玫瑰之旅' ] }
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