vkdl.js

elements = document.getElementsByClassName('audio_row');

var cmd = ""

function log(elid, s) {
    var re = /.*<!json>(.*)<!>/
    var match = re.exec(s)
    res = JSON.parse(match[1])
    fname = res[0][4] + "-" + res[0][3]
    fname = fname.replace("/", "")
    console.log("logging ", res)
    cmd += "echo " + elid + "\n"
    cmd += "wget '" + res[0][2] + "' -O '" + fname + "_" + elid + ".mp3'\n"
    cmd += "sleep 1.5\n"
}

var elid = 0

function run() {
    var el = elements[elid]
    elid++
    if (elid > elements.length) {
        console.log(cmd)
        return
    }
    var id = el.getAttribute("data-full-id")
    var url = "https://vk.com/al_audio.php";
    var params = "act=reload_audio&al=1&ids=" + id
    console.log("elid=" + elid + "sending " + id)
    var xhr = new XMLHttpRequest();
    xhr.open("POST", url, true);
    xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    xhr.onreadystatechange = function() {
        if(xhr.readyState == 4 && xhr.status == 200) {
            console.log(xhr.responseText)
            log(elid, xhr.responseText);
        }
    }
    xhr.send(params);
    setTimeout(run, 1500)
}
run()