一、打开终端 输入 yarn init -y
    在package.json文件中输入

    1. "scripts": {
    2.     "start": "nodemon index.js"
    3.   }

    image.png
    yarn add koa puppeteer
    yarn add koa-router
    yarn add koa2-cors
    新建一个index.js文件

    1. const run = require('./reptile/db');
    2. const koa = require("koa");
    3. const Router = require('koa-router');
    4. const router = new Router();
    5. var cors = require('koa2-cors');
    6. const app =  new koa();
    7. router.get("/candy",async ctx=>{
    8.     var data = await run();
    9.     ctx.body = data;
    10. })
    11. app.use(cors());
    12. app.use(router.routes())
    13. app.listen(8080)

    新建一个index.html文件

    1. <title>Document</title>
    2.     <script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.js"></script>
    3. </head>
    4. <body>
    5.     <script>
    6.         var url = "http://loaclhost:8080/candy";
    7.         $.ajax({
    8.             url,
    9.             success:res=>{
    10.                 console.log(res)
    11.             }
    12.         })
    13.     </script>

    新建一个reptile文件夹 db.js文件

    const puppeteer = require("puppeteer");
const url ="https://www.duitang.com/"
async function run(){
    const broswer = await puppeteer.launch();
    const page = await broswer.newPage();
    await page.goto(url,{
        waitUntil:'networkidle2'
    })
    await page.waitFor(2000)
    await page.hover(".dynamic-feed-item")
    let res = await page.evaluate(()=>{
        var $ = window.jQuery;
        var items = $(".dynamic-feed-item");
        var links = [];
        if(items.length>0){
            items.each((index,item)=>{
                var imgUrl = $(item).find(".user-info img").attr("src");
                var title = $(item).find(".user-desc .username").text(); 
                var time = $(item).find(".user-desc .publish-time").text(); 
                var source = $(item).find(".dynamic-album-desc").text();
                var cmt = $(item).find(".favorite-action .detail-text").text();
                var image = $(item).find(".dynamic-multi-img-container img");
                var image = [...image];
                var images = image.map(i=>{
                    return $(i).attr("src")
                })
                console.log(image)
                links.push({
                    title,
                    source,
                    time,
                    cmt,
                    imgUrl,
                    images
                }) 
            })

        }
        return links
    })
    broswer.close();
    return res;

}
module.exports = run

    终端yarn start