cheerio

Scraping URLs from a web page with Node.js

别来无恙 提交于 2020-05-29 10:24:12
问题 I'm trying to scrape all URLs from a website and put them into an array. I have a question about an array index. If I add an index number like 2 into array[2], the command line replies with "undefined". If I remove the index and print the whole array, it prints all the URLs line by line. I want each URL to be its own index like: array[0] = First URL found array[1] = Second URL found array[2] = Thirs URL found etc. Can anyone point me in the right direction? Thank you. var request = require(

Scraping URLs from a web page with Node.js

蹲街弑〆低调 提交于 2020-05-29 10:24:07
问题 I'm trying to scrape all URLs from a website and put them into an array. I have a question about an array index. If I add an index number like 2 into array[2], the command line replies with "undefined". If I remove the index and print the whole array, it prints all the URLs line by line. I want each URL to be its own index like: array[0] = First URL found array[1] = Second URL found array[2] = Thirs URL found etc. Can anyone point me in the right direction? Thank you. var request = require(

Problem in saving the image saving from url in nodejs

感情迁移 提交于 2020-04-16 04:42:44
问题 I'm trying to scrap data from website while scrapping it i'm getting error like file "An error ocured while loading image" while opening image from my server directory.image is stored with extension but the image is not opening properly var request = require('request'); var cheerio = require('cheerio'); const fs = require("fs"); function hello (){ url = ''; request(url, function(error, response, html){ if(!error){ var $ = cheerio.load(html); var img = $('img.control-label'); var img_url = $(

Problem in saving the image saving from url in nodejs

末鹿安然 提交于 2020-04-16 04:41:01
问题 I'm trying to scrap data from website while scrapping it i'm getting error like file "An error ocured while loading image" while opening image from my server directory.image is stored with extension but the image is not opening properly var request = require('request'); var cheerio = require('cheerio'); const fs = require("fs"); function hello (){ url = ''; request(url, function(error, response, html){ if(!error){ var $ = cheerio.load(html); var img = $('img.control-label'); var img_url = $(

DIY技术资讯抓取工具的实践与研究

爷,独闯天下 提交于 2020-04-06 00:23:09
前言 相信每一个技术人员都有周期性获取技术资讯的诉求,而获取的方式也多种多样。例如,用资讯类APP,进行RSS订阅,参加行业大会,深入技术社区,订阅期刊杂志、公众号,等等,都是可选的方式。这些方式看到信息的成本都很低,有“开箱即得”的感觉。但缺点也很明显,有点像“大班课”,可以满足一类人的需求,但难较好地满足每个参与者的个性化诉求。通过这些方式,要想真正拿到自己所需要的信息的成本并不低(虽然智能推荐在往满足个性化诉求方面迭代,但离期待仍有较大的差距)。对于个性化诉求,最简单的方式就是你感兴趣哪方面的内容就去逐一主动检索或者浏览,但这种方式的成本显然太高。 核心的问题是,上面的两大类路径,都不是很懂你(了解你的意图和诉求)。而你需要一个既懂你,成本又不是太高的方式。 一、对于技术资讯获取DIY的框架性思考 相信在当前相当一段时期内,最适合的个性化资讯获取方式仍然是工具+人工相组合的方式。相比纯工具的算法推荐,一些付费资讯渠道已经在(智能)工具的基础上,对信息进行了人工的筛选、加工处理,质量会更好。如果你是程序员,自己编写一些小爬虫,在其中注入自己的喜好与智慧,不失为一种懂你且成本不高的方式。而且通过这种方式,你将获得很好的自我掌控感。本文中,笔者就着重介绍这种方式。 值得提醒的是,本文所涉内容,仅为学习讨论技术,切勿用作非法用途。 具体来说,分为四部分(如图1.1所示): 图1.1

cheerio / jquery selectors: how to get text in tag a?

夙愿已清 提交于 2020-02-24 09:29:44
问题 I am trying to access links on a website. The website looks like the first code sample and the links are in different div-containers: <div id="list"> <div class="class1"> <div class="item-class1"> <a href="http://www.example.com/1">example1</a> </div> </div> <div class="class2"> <div class="item-class2"> <a href="http://www.example.com/2">example2</a> </div> </div> </div> I did tried to extract the links with this code: var list = []; $('div[id="list"]').find('a').each(function (index,

cheerio / jquery selectors: how to get text in tag a?

主宰稳场 提交于 2020-02-24 09:29:44
问题 I am trying to access links on a website. The website looks like the first code sample and the links are in different div-containers: <div id="list"> <div class="class1"> <div class="item-class1"> <a href="http://www.example.com/1">example1</a> </div> </div> <div class="class2"> <div class="item-class2"> <a href="http://www.example.com/2">example2</a> </div> </div> </div> I did tried to extract the links with this code: var list = []; $('div[id="list"]').find('a').each(function (index,

how to filter cheerio objects in `each` with selector?

生来就可爱ヽ(ⅴ<●) 提交于 2020-01-24 13:20:26
问题 I'm parsing a simple webpage using Cheerio and I was wandering if possible is follwing: With a html of this structure: <tr class="human"> <td class="event"><a>event1</a></td> <td class="name">name1</td> <td class="surname"><a>surname1</a></td> <td class="date">2011</td> </tr> <tr class="human"> <td class="event"><a>event2</a></td> <td class="name">name2</td> <td class="surname"><a>surname2</a></td> <td class="date">2012</td> </tr> <tr class="human"> <td class="event"><a>event3</a></td> <td

how to filter cheerio objects in `each` with selector?

坚强是说给别人听的谎言 提交于 2020-01-24 13:19:07
问题 I'm parsing a simple webpage using Cheerio and I was wandering if possible is follwing: With a html of this structure: <tr class="human"> <td class="event"><a>event1</a></td> <td class="name">name1</td> <td class="surname"><a>surname1</a></td> <td class="date">2011</td> </tr> <tr class="human"> <td class="event"><a>event2</a></td> <td class="name">name2</td> <td class="surname"><a>surname2</a></td> <td class="date">2012</td> </tr> <tr class="human"> <td class="event"><a>event3</a></td> <td

how to filter cheerio objects in `each` with selector?

冷暖自知 提交于 2020-01-24 13:19:06
问题 I'm parsing a simple webpage using Cheerio and I was wandering if possible is follwing: With a html of this structure: <tr class="human"> <td class="event"><a>event1</a></td> <td class="name">name1</td> <td class="surname"><a>surname1</a></td> <td class="date">2011</td> </tr> <tr class="human"> <td class="event"><a>event2</a></td> <td class="name">name2</td> <td class="surname"><a>surname2</a></td> <td class="date">2012</td> </tr> <tr class="human"> <td class="event"><a>event3</a></td> <td