Extract stream url from google drive [2020]

extract_url_from_gdrive.js

function get_map() {
    var str = document.head.innerHTML, //get html in current page
        regex = /fmt_stream_map",(.*?)]/gm, //fetch map regex
        m;

    if ((m = regex.exec(str)) !== null) {
        return m[1].replace(/"/g, ",");
    }
    return null;
}


function parse_map(str) {
    var regex = /https:(.*?),/mg,
        m,
        src = [];
    while ((m = regex.exec(str)) !== null) {
        // This is necessary to avoid infinite loops with zero-width matches
        if (m.index === regex.lastIndex) {
            regex.lastIndex++;
        }

        // The result can be accessed through the `m`-variable.
        m.forEach((match, groupIndex) => {
            if (groupIndex == 1) {
                src.push(match);
            }
        });
    }
    return src;
}

function get_quality(url) {
    if (contain(url, 'itag=37')) {
        return '1080p';
    } else if (contain(url, 'itag=22')) {
        return '720p';
    } else if (contain(url, 'itag=59')) {
        return '480p';
    } else if (contain(url, 'itag=18')) {
        return '360p';
    }
    return null;
}

function contain(m, s) {
    return m.indexOf(s) != -1;
}


var map = get_map(),
    out = [];

if (map != null) {
    var srx = parse_map(map);
    srx.forEach(e => {
        e = JSON.parse('"https:' + e + '"');
        var qua = get_quality(e);
        if (qua != null) {
            var tmp = {
                'label': qua,
                'file': e
            }
            out.push(tmp);
        }

    })
}

console.log(JSON.stringify(out));