Headless Chrome Download Images

main.js

const puppeteer = require('puppeteer');
const fs = require("fs");

let crawlPage = async (url, pageID) => {
    const browser = await puppeteer.launch({headless:true, });
    const page = await browser.newPage();

    // prevent
    // TimeoutError: Navigation timeout of 30000 ms exceeded
    await page.setDefaultNavigationTimeout(0);

    await page.goto(url);

    await page.waitFor(1000);
    const nodes = await page.evaluate(() => {
        const images = document.querySelectorAll(`.chimg_photo`);
        return [].map.call(images, img => img.src);
    });

    for (let i = 0; i < nodes.length; i++) {
        let imgURL = nodes[i];
        let imgPath = imgURL.split('/');
        let imgName = imgPath[imgPath.length - 1];
        let viewSource = await page.goto(imgURL);
        fs.writeFile("./img/" + imgName, await viewSource.buffer(), function (err) {
            if (err) {
                return console.log(err);
            }
            console.log('PageID: '+ pageID + ', ' + imgName + ' downloaded.');
        });
    }

    await browser.close();
};

(async() => {
    for (let i = 60; i > 50; i--) {
        await crawlPage('http://program.tving.com/tvn/cloy/5/Board/View?page=1&b_seq=' + i, i);
    }
})();

(async() => {
    for (let i = 50; i > 40; i--) {
        await crawlPage('http://program.tving.com/tvn/cloy/5/Board/View?page=1&b_seq=' + i, i);
    }
})();

(async() => {
    for (let i = 30; i > 20; i--) {
        await crawlPage('http://program.tving.com/tvn/cloy/5/Board/View?page=1&b_seq=' + i, i);
    }
})();