<?php
if(!isset($_GET['id'])) exit;
else $id = stripslashes($_GET['id']);

// Function to compress our output
function print_gzipped_output() {
  if (headers_sent())
    $encoding = false;
  else if( strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'x-gzip') !== false )
    $encoding = 'x-gzip';
  else if( strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== false )
    $encoding = 'gzip';
  else
    $encoding = false;

  header('Content-Type: application/x-javascript; charset=utf-8');
  $contents = ob_get_clean();
  $size = strlen($contents);

  if ($encoding && $size > 2048) {
    header('Content-Encoding: ' . $encoding);
    print("\x1f\x8b\x08\x00\x00\x00\x00\x00");
    $contents = gzcompress($contents, 9);
    $contents = substr($contents, 0, $size);
  }

  print($contents);
  exit();
}

ob_start();
ob_implicit_flush(0);

// Blacklist Chrome and Safari using NinjaKit
if (stristr($_SERVER['HTTP_USER_AGENT'], "AppleWebKit") != FALSE) {
  echo "// This updater doesn't support NinjaKit";
  print_gzipped_output();
}

// Ids of scripts that have been deemed unsafe (possibly malicious)
// and are banned from using the updater.
// A denial of service notice is added to the blacklisted script for the lulz
$blacklist = array('94715');
if (in_array($id, $blacklist)) { 
?>
/* 
   If you are reading this it's because Another Auto Updater has been 
   included with a possibly malicious script that might be attempting to insert code
   without the user's knowledge or consent. I would advise you to either uninstall or disable
   this script, and contact its author. If this is your script and you believe it has been
   wrongly marked as malicious please shoot me an email at medleymind@gmail.com
*/
(function() {
  var i = document.createElement('img');
  i.src = "http://sizzlemctwizzle.com/xzibit_service_denial_notice.jpg";
  i.title= "Click Xzibit for details";
  i.setAttribute('style', 'position:absolute;top:0px;width:400px;');
  i.setAttribute('onclick', 'alert("If you are reading this it\'s because Another Auto Updater has been\n' +
    'included with a possibly malicious script that might be attempting to insert code\n' +
    'without the user\'s knowledge or consent. I would advise you to either uninstall or disable\n' +
    'this script, and contact its author. If this is your script and you believe it has been\n' +
    'wrongly marked as malicious please shoot me an email at medleymind@gmail.com")');
  document.body.appendChild(i);
})();
<?php
  print_gzipped_output();
}

// Grab script data remotely
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'http://userscripts.org/scripts/source/'.$id.'.meta.js');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$raw_meta = curl_exec($ch);
curl_close($ch);

// Parse response
preg_match("/\/\/\s*@name\s+(.+)\s*\n/i", $raw_meta, $matches);
if (count($matches) < 2) {
  echo "// Script is missing @name";
  print_gzipped_output();
}
$name = trim($matches[1]);

preg_match("/\/\/\s*@version\s+(.+)\s*\n/i", $raw_meta, $matches);
if (count($matches) < 2 || isset($_GET['uso'])) {
  preg_match("/\/\/\s*@uso:version\s+(.+)\s*\n/i", $raw_meta, $matches);
  $version = trim($matches[1]);
  $uso = "uso:";
} else {
  $version = trim($matches[1]);
  $uso = "";
}

if(isset($_GET['meta'])) {
  $meta = trim(stripslashes($_GET['meta']));
  if ($meta == '')
      $meta = 'scr_meta';
}

if(isset($_GET['var'])) {
  $var = trim(stripslashes($_GET['var'])); 
  if ($var == '')
     $var = '_'.$id;
  else
     $var = '_'.$var;
} else 
  $var = '_'.$id;

echo "// The following code is released under public domain.\n\nvar AutoUpdater".$var;
?> = {
    id: <?php echo $id.",\n"; ?>
    days: <?php if(isset($_GET['days']) && $_GET['days'] > 0.04) echo stripslashes($_GET['days']); else echo '2';
    if (!isset($meta)) {
        echo ",\n" . '    name: "' . $name . '",' . "\n" . '    version: "'
             . $version . '"' . ",\n";
    } else {
        echo "\n    name: /\/\/\s*@name\s+(.+)\s*".'\n/i.exec('.$meta.")[1],";
        echo "\n    version: /\/\/\s*@".$uso."version\s+(.+)\s*".'\n/i.exec('.$meta.")[1],\n";
    }
?>    time: new Date().getTime(),
    call: function(response, secure) {
        GM_xmlhttpRequest({
            method: 'GET',
	    url: 'http'+(secure ? 's' : '')+'://userscripts.org/scripts/source/'+this.id+'.meta.js',
	    onload: function(xpr) {AutoUpdater<?php echo $var; ?>.compare(xpr, response);},
            onerror: function(xpr) {if (secure) AutoUpdater<?php echo $var; ?>.call(response, false);}
        });
    },
    enable: function() {
        GM_registerMenuCommand("Enable "+this.name+" updates", function() {
            GM_setValue('updated<?php echo $var; ?>', new Date().getTime()+'');
            AutoUpdater<?php echo $var; ?>.call(true, true)
        });
    },
    compareVersion: function(r_version, l_version) {
        var r_parts = r_version.split('.'),
            l_parts = l_version.split('.'),
            r_len = r_parts.length,
            l_len = l_parts.length,
            r = l = 0;
        for(var i = 0, len = (r_len > l_len ? r_len : l_len); i < len && r == l; ++i) {
            r = +(r_parts[i] || '0');
            l = +(l_parts[i] || '0');
        }
        return (r !== l) ? r > l : false;
    },
    compare: function(xpr,response) {
        this.xversion=/\/\/\s*@<?php echo $uso; ?>version\s+(.+)\s*\n/i.exec(xpr.responseText);
        this.xname=/\/\/\s*@name\s+(.+)\s*\n/i.exec(xpr.responseText);
        if ( (this.xversion) && (this.xname[1] == this.name) ) {
            this.xversion = this.xversion[1];
            this.xname = this.xname[1];
        } else {
            if ( (xpr.responseText.match("the page you requested doesn't exist")) || (this.xname[1] != this.name) ) 
	    GM_setValue('updated<?php echo $var; ?>', 'off');
            return false;
        }
        var updated = this.compareVersion(this.xversion, this.version);
        if ( updated && confirm('A new version of '+this.xname+' is available.\nDo you wish to <?php 
                                 echo isset($_GET["show"]) ? 
                                      "visit the script\'s homepage" : 
                                      "install the latest version"; ?>?') ) {
<?php if (isset($_GET["show"])) { ?>
            GM_openInTab('http://userscripts.org/scripts/show/' + this.id);
<?php } else { ?>
            try { 
                location.href = 'http://userscripts.org/scripts/source/' + this.id + '.user.js'; 
            } catch(e) {}
<?php } ?>
        } else if ( this.xversion && updated ) {
            if(confirm('Do you want to turn off auto updating for this script?')) {
	        GM_setValue('updated<?php echo $var; ?>', 'off');
	        this.enable();
	        alert('Automatic updates can be re-enabled for this script from the User Script Commands submenu.');
            }
        } else if (response)
            alert('No updates available for '+this.name);
    },
    check: function() {
        if (GM_getValue('updated<?php echo $var; ?>', 0) == "off")
            this.enable();
        else {
            if (+this.time > (+GM_getValue('updated<?php echo $var; ?>', 0) + 1000*60*60*24*this.days)) {
                GM_setValue('updated<?php echo $var; ?>', this.time+'');
                this.call(false, true);
            }
            GM_registerMenuCommand("Check "+this.name+" for updates", function() {
                GM_setValue('updated<?php echo $var; ?>', new Date().getTime()+'');
                AutoUpdater<?php echo $var; ?>.call(true, true)
            });
        }
    }
};
if (typeof GM_xmlhttpRequest !== 'undefined' &&
    typeof GM_updatingEnabled === 'undefined') // has an updater?
    try {
        if (unsafeWindow.frameElement === null) 
            AutoUpdater<?php echo $var; ?>.check();
    } catch(e) {
        AutoUpdater<?php echo $var; ?>.check();
    }
<?php
  print_gzipped_output();
?>