[instagram-api] How can I get a user's media from Instagram without authenticating as a user?

The below nodejs code scrapes popular Images from an Instagram Page. The function 'ScrapeInstagramPage' takes care of post ageing effect.

var request = require('parse5');
var request = require('request');
var rp      = require('request-promise');
var $       = require('cheerio'); // Basically jQuery for node.js 
const jsdom = require("jsdom");    
const { JSDOM } = jsdom;


function ScrapeInstagramPage (args) {
    dout("ScrapeInstagramPage for username -> " + args.username);
    var query_url = 'https://www.instagram.com/' + args.username + '/';

    var cookieString = '';

    var options = {
        url: query_url,
        method: 'GET',
        headers: {
            'x-requested-with' : 'XMLHttpRequest',
            'accept-language'  : 'en-US,en;q=0.8,pt;q=0.6,hi;q=0.4', 
            'User-Agent'       : 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36',
            'referer'          : 'https://www.instagram.com/dress_blouse_designer/',
            'Cookie'           : cookieString,
            'Accept'           : '*/*',
            'Connection'       : 'keep-alive',
            'authority'        : 'www.instagram.com' 
        }
    };


    function dout (msg) {
        if (args.debug) {
            console.log(msg);
        }
    }

    function autoParse(body, response, resolveWithFullResponse) {
        // FIXME: The content type string could contain additional values like the charset. 
        // Consider using the `content-type` library for a robust comparison. 
        if (response.headers['content-type'] === 'application/json') {
            return JSON.parse(body);
        } else if (response.headers['content-type'] === 'text/html') {
            return $.load(body);
        } else {
            return body;
        }
    }

    options.transform = autoParse;


    rp(options)
        .then(function (autoParsedBody) {
            if (args.debug) {
                console.log("Responce of 'Get first user page': ");
                console.log(autoParsedBody);
                console.log("Creating JSDOM from above Responce...");
            }

            const dom = new JSDOM(autoParsedBody.html(), { runScripts: "dangerously" });
            if (args.debug) console.log(dom.window._sharedData); // full data doc form instagram for a page

            var user = dom.window._sharedData.entry_data.ProfilePage[0].user;
            if (args.debug) {
                console.log(user); // page user
                console.log(user.id); // user ID
                console.log(user.full_name); // user full_name
                console.log(user.username); // user username
                console.log(user.followed_by.count); // user followed_by
                console.log(user.profile_pic_url_hd); // user profile pic
                console.log(autoParsedBody.html());
            }

            if (user.is_private) {
                dout ("User account is PRIVATE");
            } else {
                dout ("User account is public");
                GetPostsFromUser(user.id, 5000, undefined);
            }
        })
        .catch(function (err) {
            console.log( "ERROR: " + err );
        });  

    var pop_posts = [];
    function GetPostsFromUser (user_id, first, end_cursor) {
        var end_cursor_str = "";
        if (end_cursor != undefined) {
            end_cursor_str = '&after=' + end_cursor;
        }

        options.url = 'https://www.instagram.com/graphql/query/?query_id=17880160963012870&id=' 
                        + user_id + '&first=' + first + end_cursor_str;

        rp(options)
            .then(function (autoParsedBody) {
                if (autoParsedBody.status === "ok") {
                    if (args.debug) console.log(autoParsedBody.data);
                    var posts = autoParsedBody.data.user.edge_owner_to_timeline_media;

                    // POSTS processing
                    if (posts.edges.length > 0) {
                        //console.log(posts.edges);
                        pop_posts = pop_posts.concat
                        (posts.edges.map(function(e) {
                            var d = new Date();
                            var now_seconds = d.getTime() / 1000;

                            var seconds_since_post = now_seconds - e.node.taken_at_timestamp;
                            //console.log("seconds_since_post: " + seconds_since_post);

                            var ageing = 10; // valuses (1-10]; big value means no ageing
                            var days_since_post = Math.floor(seconds_since_post/(24*60*60));
                            var df = (Math.log(ageing+days_since_post) / (Math.log(ageing)));
                            var likes_per_day = (e.node.edge_liked_by.count / df);
                            // console.log("likes: " + e.node.edge_liked_by.count);
                            //console.log("df: " + df);
                            //console.log("likes_per_day: " + likes_per_day);
                            //return (likes_per_day > 10 * 1000);
                            var obj = {};
                            obj.url = e.node.display_url;
                            obj.likes_per_day = likes_per_day;
                            obj.days_since_post = days_since_post;
                            obj.total_likes = e.node.edge_liked_by.count;
                            return obj;
                        }
                        ));

                        pop_posts.sort(function (b,a) {
                          if (a.likes_per_day < b.likes_per_day)
                            return -1;
                          if (a.likes_per_day > b.likes_per_day)
                            return 1;
                          return 0;
                        });

                        //console.log(pop_posts);

                        pop_posts.forEach(function (obj) {
                            console.log(obj.url);
                        });
                    }

                    if (posts.page_info.has_next_page) {
                        GetPostsFromUser(user_id, first, posts.page_info.end_cursor);
                    }
                } else {
                    console.log( "ERROR: Posts AJAX call not returned good..." );
                }
            })
            .catch(function (err) {
                console.log( "ERROR: " + err );
            }); 
    }
}


ScrapeInstagramPage ({username : "dress_blouse_designer", debug : false});

Try it here

Example: For given a URL 'https://www.instagram.com/dress_blouse_designer/' one may call function

ScrapeInstagramPage ({username : "dress_blouse_designer", debug : false});