Instagram Follower Web Scrapper

/**
*
* Instagram Follower Web Scrapper
*
* Steps to use.
* 1. Open instagram user's profile in browser https://www.instagram.com/tvfpitchers/
* 2. Open console ( press F12 in chrome ) and paste all the code below
* 3. Click on followers button and load all the followers
* 4. Call function downloadAsCsv() by writing "downloadAsCsv()" in console to download csv file containing user's all the followers .
*
* @author : Hardik Sondagar <hardikmsondagar@gmail.com>
*
*/

var followers = [];

(function(XHR) {
"use strict";

var stats = [];
var timeoutId = null;

var open = XHR.prototype.open;
var send = XHR.prototype.send;

XHR.prototype.open = function(method, url, async, user, pass) {
this._url = url;
open.call(this, method, url, async, user, pass);
};

XHR.prototype.send = function(data) {
var self = this;
var start;
var oldOnReadyStateChange;
var url = this._url;
var match_url_string = 'query';

function onReadyStateChange() {
if (self.readyState == 4 && url.indexOf(match_url_string) > -1) {
var response = JSON.parse(self.response);
followers = followers.concat(response.data.user.edge_followed_by.edges);
}

if (oldOnReadyStateChange) {
oldOnReadyStateChange();
}
}

if (!this.noIntercept) {
start = new Date();

if (this.addEventListener) {
this.addEventListener("readystatechange", onReadyStateChange, false);
} else {
oldOnReadyStateChange = this.onreadystatechange;
this.onreadystatechange = onReadyStateChange;
}
}

send.call(this, data);
}
})(XMLHttpRequest);

function downloadAsCsv() {

var csvContent = "data:text/csv;charset=utf-8,";

var header = "Username,Full Name,Pic,Id\n";
csvContent += header;


followers.forEach(function(infoArray, index) {

var data = [];

for (var i in infoArray) {
data.push(infoArray[i].username);
data.push(infoArray[i].full_name);
data.push(infoArray[i].profile_pic_url);
data.push(infoArray[i].id);
}

dataString = data.join(",");
csvContent += index < followers.length ? dataString + "\n" : dataString;

});

var encodedUri = encodeURI(csvContent);
var link = document.createElement("a");
link.setAttribute("href", encodedUri);

var pathArray = window.location.pathname.split('/');

var milliseconds = (new Date).getTime();
var filename = 'followers.' + milliseconds + '.csv';

if (pathArray && pathArray.length > 1) {
filename = pathArray[1] + '.' + milliseconds + '.csv';
}
link.setAttribute("download", filename);
document.body.appendChild(link); // Required for FF

link.click(); // This will download the data file named "my_data.csv".

}