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                ~~~ 'use strict'; /** * cheerio 模塊的使用 * 1.安裝 npm i cheerio --save * 2.引入cheerio模塊 const cheerio = require('cheerio'); * 3.加載要解析的內容 const $=cheerio.load('<h2 class="title">Hello World</h2>') * 4.用法 * $('.title').html() 獲取了要匹配的標題的內容 * 5.解決漢字是亂碼問題 * const $ = cheerio.load(htmlData, { decodeEntities: false }); * */ const cheerio = require('cheerio'); module.exports = { schedule: { interval: '5s', type: 'all', }, async task(ctx) { const url = 'https://news.baidu.com'; const result = await ctx.service.spider.requestUrl(url); const htmlData = result.data.toString(); // 檢測網站是瑣被篡改 網站是否宕機 const $ = cheerio.load(htmlData, { decodeEntities: false }); const title = $('title') .html(); console.log(title); if (title !== '百度新聞——海量中文資訊平臺') { console.log('網站掛掉了,或者被修改了!'); } else { console.log('正常...'); } $('.hotnews a') .each(function() { console.log($(this) .html()); }); }, }; ~~~
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