Данная страница будет полезной для тех, кто решил взять заказ на парсер аудио-треков VK и резко понял, что ничего не понял.
https://m.vk.com/mp3/audio_api_unavailable.mp3?extra=AeL2rMfFyZzlD3HkyvfnvNvLx1KOqw5UDfuXCOTvttm4ts1OBJnYELvHyxvODI9fnM9YztD5A3iOyI14sxv2mNiXt3iTzdLInduXzvG9C2uVr3b5mezinfj2lJbpDhGYC25rDxbwsOPQmg1eu2Pbyxr3ntPowNLhDMrrDs8XnKu2sOuOyO8XzMf1otDmBtL6BNvllNjZx3aZuLHpq3aOBvvhzenJnZKTzKnMuwfKBI4TquffrtzKv2nymMyVDu1LzJnuwMLxwMm/BeTcserWlun3ExLVBG#AqSZntu
var id = 0; //Ваш userid
var n = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMN0PQRSTUVWXYZO123456789+/=",
i = {
v: function(e) {
return e.split("").reverse().join("")
},
r: function(e, t) {
e = e.split("");
for (var i, o = n + n, s = e.length; s--;) i = o.indexOf(e[s]), ~i && (e[s] = o.substr(i - t, 1));
return e.join("")
},
s: function(e, t) {
var n = e.length;
if (n) {
var i = r(e, t),
o = 0;
for (e = e.split(""); ++o < n;) e[o] = e.splice(i[n - 1 - o], 1, e[o])[0];
e = e.join("")
}
return e
},
i: function(e, t) {
return i.s(e, t ^ id)
},
x: function(e, t) {
var n = [];
return t = t.charCodeAt(0), each(e.split(""), function(e, i) {
n.push(String.fromCharCode(i.charCodeAt(0) ^ t))
}), n.join("")
}
};
function o() {
return window.wbopen && ~(window.open + "").indexOf("wbopen")
}
function s(e) {
if (!o() && ~e.indexOf("audio_api_unavailable")) {
var t = e.split("?extra=")[1].split("#"),
n = "" === t[1] ? "" : a(t[1]);
if (t = a(t[0]), "string" != typeof n || !t) return e;
n = n ? n.split(String.fromCharCode(9)) : [];
for (var s, r, l = n.length; l--;) {
if (r = n[l].split(String.fromCharCode(11)), s = r.splice(0, 1, t)[0], !i[s]) return e;
t = i[s].apply(null, r)
}
if (t && "http" === t.substr(0, 4)) return t
}
return e
}
function a(e) {
if (!e || e.length % 4 == 1) return !1;
for (var t, i, o = 0, s = 0, a = ""; i = e.charAt(s++);) i = n.indexOf(i), ~i && (t = o % 4 ? 64 * t + i : i, o++ % 4) && (a += String.fromCharCode(255 & t >> (-2 * o & 6)));
return a
}
function r(e, t) {
var n = e.length,
i = [];
if (n) {
var o = n;
for (t = Math.abs(t); o--;) t = (n * (o + 1) ^ t + o) % n, i[o] = t
}
return i
}
global $n, $i, $id;
$n = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMN0PQRSTUVWXYZO123456789+/=";
$id = 123456789; //user_id
$i = [
'v' => function($e) {
return strrev($e);
},
'r' => function($e, $t){
global $n;
$e = str_split($e);
for ($o = $n . $n, $s = count($e); $s--;){
$i = stripos($o, $e[$s]);
if(~$i){
$e[$s] = substr($o, $i - $t, 1);
}
}
return implode("", $e);
},
's' => function($e, $t) {
$n = strlen($e);
if ($n) {
$i = r($e, $t);
$o = 0;
$e = str_split($e);
for (; ++$o < $n;){
$p = array_splice($e, $i[$n - 1 - $o], 1, $e[$o]);
$e[$o] = $p[0];
}
$e = implode("", $e);
}
return $e;
},
'i' => function($e, $t){
global $i, $id;
$k = $i['s'];
return $k($e, $t ^ $id);
},
];
function o() {
return false;
}
function a($e){
global $n;
if (!$e || strlen($e) % 4 == 1) {
return !1;
}
$s = 0;
for ($o = 0, $a = "";$s < strlen($e);) {
$i = $e[$s++];
$i = strpos($n, $i);
if ($i !== false) {
$t = ($o % 4) ? 64 * $t + $i : $i;
if ($o++ % 4) {
$a .= chr(255 & $t >> (-2 * $o & 6));
}
}
}
return $a;
}
function r($e, $t) {
$n = strlen($e);
$i = [];
if ($n) {
$o = $n;
$t = abs($t);
for (; $o--;){
$t = ($n * ($o + 1) ^ $t + $o) % $n;
$i[$o] = $t;
}
}
return $i;
}
function s($e){
global $i;
if (!o() && strpos($e, "audio_api_unavailable") !== false) {
$t = explode("?extra=", $e);
$t = $t[1];
$t = explode("#", $t);
$n = ("" === $t[1]) ? "" : a($t[1]);
$t = a($t[0]);
if (!is_string($n) || !$t){ return $e;}
$n = $n ? explode(chr(9), $n) : [];
for ($l = count($n); $l--;) {
$r = explode(chr(11), $n[$l]);
$s = array_splice($r, 0, 1, $t);
$s = $s[0];
if (!$i[$s]){ return $e; }
$t = $i[$s](...$r);
}
if ($t && "http" === substr($t, 0, 4)){ return $t;}
}
return $e;
}
s("https://m.vk.com/mp3/audio_api_unavailable.mp3?extra=encodeextraurl");
К сожалению, не доступен сервер mySQL