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Youtube Sep18 Sig changes #25

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Dec 25, 2018
+42 −15
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Youtube Sep18 Sig changes #25

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57 changes: 42 additions & 15 deletions src/YouTubeDownloader.php
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Original file line number Diff line number Diff line change
Expand Up @@ -3,11 +3,20 @@
// utils.php
function sig_js_decode($player_html){

// what javascript function is responsible for signature decryption?
// var l=f.sig||Xn(f.s)
// a.set("signature",Xn(c));return a
if(preg_match('/signature",([a-zA-Z0-9$]+)\(/', $player_html, $matches)){

/* Youtube Sep2018 Changes
deDE:
var aL={NI:function(a,b){a.splice(0,b)},jl:function(a){a.reverse()},l5:function(a,b){var c=a[0];a[0]=a[b%a.length];a[b%a.length]=c}}
bL=function(a){a=a.split("");aL.jl(a,58);aL.NI(a,2);aL.l5(a,35);aL.NI(a,2);aL.jl(a,45);aL.l5(a,4);aL.jl(a,46);return a.join("")};
->$L=function(a,b,c){b=void 0===b?"":b;c=void 0===c?"":c;var d=new g.cL(a);a.match(/https:\/\/yt.akamaized.net/)||d.set("alr","yes");c&&d.set(b,bL(c));return d};
*/

// Pattern -> .*;.&&..set(.,XX(.*));.*;};
$prefix ="/\W*.*;\w\&&\w\.set\(\w,";
$funcName = "([\$a-zA-Z0-9]{2})";
$suffix= "\(.*\).*;.*;/";

if(preg_match($prefix.$funcName.$suffix, $player_html, $matches)){

$func_name = $matches[1];
$func_name = preg_quote($func_name);

Expand Down Expand Up @@ -60,9 +69,6 @@ function sig_js_decode($player_html){
return false;
}




// YouTube is capitalized twice because that's how youtube itself does it:
// https://developers.google.com/youtube/v3/code_samples/php
class YouTubeDownloader {
Expand All @@ -71,21 +77,42 @@ class YouTubeDownloader {
private $cookie_dir;

private $itag_info = array(

5 => "FLV 400x240",
6 => "FLV 450x240",
13 => "3GP Mobile",
17 => "3GP 144p",
18 => "MP4 360p",
22 => "MP4 720p (HD)",
34 => "FLV 360p",
35 => "FLV 480p",
36 => "3GP 240p",
37 => "MP4 1080",
38 => "MP4 3072p",

// questionable MP4s
43 => "WebM 360p",
44 => "WebM 480p",
45 => "WebM 720p",
46 => "WebM 1080p",
59 => "MP4 480p",
78 => "MP4 480p",

43 => "WebM 360p",

17 => "3GP 144p"
82 => "MP4 360p 3D",
83 => "MP4 480p 3D",
84 => "MP4 720p 3D",
85 => "MP4 1080p 3D",
91 => "MP4 144p",
92 => "MP4 240p HLS",
93 => "MP4 360p HLS",
94 => "MP4 480p HLS",
95 => "MP4 720p HLS",
96 => "MP4 1080p HLS",
100 => "WebM 360p 3D",
101 => "WebM 480p 3D",
102 => "WebM 720p 3D",
120 => "WebM 720p 3D",
127 => "TS Dash Audio 96kbps",
128 => "TS Dash Audio 128kbps"
);


function __construct(){
$this->storage_dir = sys_get_temp_dir();
$this->cookie_dir = sys_get_temp_dir();
Expand Down