Get all video + audio from facebook dash

Extract all video qualities and audio from facebook

if (document.body.textContent) {
    get_all_video();
    get_audio();
}

function parseURL(url) {
    if (url == null) {
        return null;
    }
    return url.replace(/amp;/g, '');
}


function get_audio() {
    var regex = /\/>\\x3CBaseURL>(.*?)\\x3C/gm,
        str = document.body.textContent,
        m;
    if ((m = regex.exec(str)) !== null) {
        return parseURL(m[1]);
    }
    return null;
}

function get_all_video() {
    var regex = /FBQualityClass=\\"(.*?)\\" ?FBQualityLabel=\\"(.*?)\\">\\x3CBaseURL>(.*?)\\x3C/gm,
        str = document.body.textContent,
        m;
    while ((m = regex.exec(str)) !== null) {
        // This is necessary to avoid infinite loops with zero-width matches
        if (m.index === regex.lastIndex) {
            regex.lastIndex++;
        }

        var group = m[1],
            quality = m[2],
            url = parseURL(m[3]);
        console.log(group, quality, url);
    }
}