Custom Rule zhanghai/Untracker script: Instagram share reels untracker

js

/*
This script is a custom script for the Android app [Untracker](https://github.com/zhanghai/Untracker).
When sharing a reel from the Instagram app on Android, you get a link in the format `https://www.instagram.com/share/reel/...`.
This link contains a redirect to a direct link to the reel, but with a hidden tracker.
This script removes the tracker and returns the direct link to the reel.
*/


if ($.matches(url, 'www.instagram.com', '/share/reel/[^/]+/?')) {
    let counter = 10;
    while (counter > 0) {
        response = $.fetch(url, { redirect: 'follow' });
        for ([name, value] of response.headers) {
            if (name.toLowerCase() === 'location') {
                url = value;
                continue;
            }
        }
        if($.matches(url, 'www.instagram.com', '/reel/[^/]+/?')) {
            break;
        }
        counter--;
        
    }
    url = url.replace(/\?.*$/, '');
    return url;
}