iget

The goal

In: Instagram post URL, e.g. https://www.instagram.com/p/CX8wkS_qNMq/

Out: URL of the post image, e.g.

https://instagram.fdnk3-1.fna.fbcdn.net/v/t51.2885-15/e35/s1080x1080/
269961451_836551910434198_8806515854959711608_n.jpg?
_nc_ht=instagram.fdnk3-1.fna.fbcdn.net&_nc_cat=110&
_nc_ohc=hOLSmGd1DpAAX9SFiBs&edm=AJBgZrYBAAAA&ccb=7-4&
oh=00_AT_ikXhHf_8YvyySyoDQZZ2onjenV91lR79aNYFBYy4VdA&oe=6206092F&
_nc_sid=78c662

Using

The second optional param can be an image width: 640, 750 or 1080 (default) px.

Shell

iget.sh https://www.instagram.com/p/<post_id>/

PHP

require_once 'iget-php/iget.php';
$url = iget\img_url('https://www.instagram.com/p/<post_id>/');

Python

python iget-python https://www.instagram.com/p/<post_id>/

or use zipapp from releases

python iget.pyz https://www.instagram.com/p/<post_id>/

---

Notes

History

It was 04.10.2021 https://youtu.be/roBVl2X7mQs and all crap with the FB DNS happened just at the time I was recording the screencast :)

JS modules research

I assume that Instagram uses some JS module loader like the RequireJS.

Modules are some definitions of format:

__d(function(g,r,i,a,m,e,d) {
    ...

    // Exports are defined as `e` members.
    // They will be accessible from external.
    e.<feature_name> = ...

    ...
}, <id>, [<dependency ids>]);

We can require a module with __r(<id>), that returns the e exports if it exists.

Vendor.js

Actual for: https://www.instagram.com/static/bundles/es6/Vendor.js/17711fe62512.js

This file contains the module 3 that provides the createElement() from the module 13. Obtained element can be rendered using the render() from the 15 module.

For example, we can embed an image using the devtools console:

const img = __r(3).createElement('img', {src: '<url>'});
__r(15).render(img, document.body);

See https://youtu.be/y7ruPgU-BzA

It may be useful if you can bypass the CORS policy.