index.js

const puppeteer = require('puppeteer')
const fs=require('fs')
const https=require('https')
const keys=require('./keys')
const readlineSync=require('readline-sync')
const exec = require('child_process').exec;


const download = (url, destination) => new Promise((resolve,reject)=>
{
    const file=fs.createWriteStream(destination)

    https.get(url, response=>{
        response.pipe(file)
        
        file.on('finish',()=>{
            file.close(resolve(true))
        })
    })
    .on('error',error=>{
        fs.unlink(destination)
        reject(error.message)
    })
})

const getCred=async()=>{
    let user=keys.user
    let pass=keys.pass
    if(user.length===0 || pass.length==0)
    {
        console.log("Set the login credentials in keys.js")
        process.exit(1)
    }
    return [user,pass]
}
const parselink=async(link)=>{
    var st=link.split('/').slice(-1)[0]
    var name=st.split('?').slice(0)[0]
    return name
}
async function start() {
    const cred=await getCred()
    const user=cred[0]
    const pass=cred[1]
    
    var uid=readlineSync.question('enter username to scrap: ')

	const browser = await puppeteer.launch({
         //headless: false
 	})
    const page = await browser.newPage()
    page.setViewport({ width: 1280, height: 800 })

    await page.goto('https://www.instagram.com/accounts/login/?source=auth_switcher')

    const navigatiomPromise=page.waitForNavigation()

    await page.waitForSelector('input[name="username"]');
    await page.type('input[name="username"]',user);
    await page.type('input[name="password"]',pass);
    await page.click('button[type="submit"]');

    await navigatiomPromise

    await page.waitFor(3000)
    await page.goto(`https://www.instagram.com/${uid}`)

    //await page.waitFor(3000)
    await page.waitForSelector('div img')
    const h1 = await page.evaluate(() => 
        Array.from(document.querySelectorAll('div img')).map((partner) => partner.src)
    );
    
    browser.close();

    var mkdir = 'mkdir -p ' + uid;
    var child = exec(mkdir, function(err, stdout, stderr) {
        if (err) throw err;
    });
    
    for(let link of h1){
        var fname=await parselink(link)
        var location=uid+"/"+fname
        download(link,location).then(
            console.log(`downloaded ${fname}`)
        ).catch(error=> console.log(error))
    }
}
start();