Download Link Shortener

<?php

/*
    Download-Link Shortener
    Info and install instructions at the forum: http://rapidleech.com/forum/viewtopic.php?f=18&t=653
*/

header('X-Robots-Tag: noindex, nofollow');
require_once('rl_init.php');
require_once(CLASS_DIR . 'http.php');

// Only cURL is supported here.
if (!extension_loaded('curl') || !function_exists('curl_init') || !function_exists('curl_exec')) html_error('cURL isn\'t enabled or cURL\'s functions are disabled');

class LinkConverter {
    private $link, $count, $https = false;
    protected $debug = false;
    public function __construct($link) {
        $this->count = 0;
        $link = $this->ValidateURL($link);
        if (!$link) html_error('Invalid Link');
        $this->link = $link;
        //$this->debug = true; // Uncomment to enable debug info.
    }

    public function MassConvert($methods) {
        foreach(array_filter(explode(' ', $methods)) as $method) {
            if ($this->count > 3) return;
            $this->Convert($method);
        }
    }

    public function Convert($method, $opts = null) {
        if ($this->count > 3) return false;
        $func = array($this, "lnk_$method");
        try {
            if (!is_callable($func)) throw new Exception(__CLASS__."::lnk_$method is not callable.");
            if (!($convertedLink = call_user_func($func, $opts))) return false;
            $this->link = $convertedLink;
        } catch (Exception $e) {
            $GLOBALS['throwRLErrors'] = false; // Disable throw on error in case of a cURL error.
            if ($this->debug) {
                textarea($e); // Debug
                //textarea(var_export($e, true)); // Debug | Extra info
            }
            return false;
        }
        $this->count++;
    }

    public function GetLink() {
        return $this->link;
    }

    protected function ValidateURL($link) {
        if (empty($link)) return false;
        $link = filter_var($link, FILTER_SANITIZE_URL);
        if (filter_var($link, FILTER_VALIDATE_URL, FILTER_FLAG_SCHEME_REQUIRED | FILTER_FLAG_HOST_REQUIRED | FILTER_FLAG_PATH_REQUIRED) && in_array(strtolower(parse_url($link, PHP_URL_SCHEME)), array('http', 'https', 'ftp'))) return $link;
        else return false;
    }

    protected function Request($link, $cookie = 0, $post = 0, $referer = 0, $auth = 0, $opts = 0) {
        if (!empty($post) && is_array($post)) $post = http_build_query($post, '', '&');
        $timeouts = array();
        $timeouts[CURLOPT_FAILONERROR] = (!$this->debug); // Fail on errors
        $timeouts[CURLOPT_CONNECTTIMEOUT] = 10; // Connection Timeout
        $timeouts[CURLOPT_TIMEOUT] = 10; // Page Timeout
        if (is_array($opts)) $opts = array_merge($opts, $timeouts);
        else $opts = $timeouts;

        $GLOBALS['throwRLErrors'] = true; // Throw errors.
        $page = cURL($link, $cookie, $post, $referer, $auth, $opts);
        $GLOBALS['throwRLErrors'] = false; // Disable throw on error.

        // Debug
        if ($this->debug) {
            $debug = "Request: $link";
            if (!empty($referer)) $debug .= "\nReferer: " . str_replace(array("\r", "\n"), array('\r', '\n'), $referer);
            if (!empty($_GET['useproxy']) && $_GET['useproxy'] == 'on' && !empty($_GET['proxy'])) $debug .= "\nProxy Enabled\nProxy: " . $_GET['proxy'];
            if (!empty($cookie)) $debug .= "\nCookie: ".(is_array($cookie) ? substr(print_r($cookie, true), 0, -1) : trim($cookie));
            if ($auth) $debug .= "\nAuth: ".base64_decode($auth);
            if ($post != '0') $debug .= "\nPOST: ".(is_array($post) ? substr(print_r($post, true), 0, -1) : $post);
            textarea("$debug\n-----\n".preg_replace('@([^\r])\n@', '$1\n'."\n", str_replace("\r\n", '\r\n'."\r\n", substr($page, 0, strpos($page, "\r\n\r\n")+4))).(strpos($page, chr(0)) === false ? substr($page, strpos($page, "\r\n\r\n")+4) : '[Binary Content?]'),200,15);
        }

        return $page;
    }

    protected function GetBody($page) {
        return (($pos = strpos($page, "\r\n\r\n")) > 0) ? substr($page, $pos + 4) : $page;
    }

    protected function json2array($content) {
        if (!function_exists('json_decode')) html_error('Error: Please enable JSON in php.');
        if (empty($content)) return NULL;
        $content = ltrim($content);
        if (($pos = strpos($content, "\r\n\r\n")) > 0) $content = trim(substr($content, $pos + 4));
        $cb_pos = strpos($content, '{');
        $sb_pos = strpos($content, '[');
        if ($cb_pos === false && $sb_pos === false) throw new Exception('Json start braces not found.');
        $sb = ($cb_pos === false || $sb_pos < $cb_pos) ? true : false;
        $content = substr($content, strpos($content, ($sb ? '[' : '{')));$content = substr($content, 0, strrpos($content, ($sb ? ']' : '}')) + 1);
        if (empty($content)) throw new Exception('No json content.');
        $rply = json_decode($content, true);
        if ($rply === NULL) throw new Exception('Error reading json.');
        return $rply;
    }

    protected function chkHttpsSupport() {
        if ($this->https) return true;
        $cV = curl_version();
        return $this->https = in_array('https', $cV['protocols'], true);
    }

    // Add Methods Here: (prefixed with 'lnk_')
    protected function lnk_adfly($opts = null) {
        $options = array( // https://adf.ly/publisher/tools#tools-api
            'key' => '1d7528f24a09dbd0339860c6a1cf9a22', /* Your ApiKey */
            'uid' => '10221009', /* Your UserId */
            'advert_type' => 'int', /* 'int' or 'banner' */
            'domain' => 'adf.ly' /* 'adf.ly', 'j.gs', 'q.gs' or 'your custom domain' */
        );
        if (!is_null($opts) && is_array($opts)) $options = array_merge($options, $opts);
        if (empty($options['key']) || empty($options['uid'])) return false;
        $options['url'] = $this->link;
        $body = $this->GetBody($this->Request('http://api.adf.ly/api.php?'.http_build_query($options, '', '&')));
        return $this->ValidateURL($body);
    }

    protected function lnk_bcvc($opts = null) {
        $options = array( // http://bc.vc/tools.php?api
            'key' => '1a708a7090a08c94e36b63cbf1de97cc', /* Your ApiKey */
            'uid' => '109189' /* Your UserId */
        );
        if (!is_null($opts) && is_array($opts)) $options = array_merge($options, $opts);
        if (empty($options['key']) || empty($options['uid'])) return false;
        $options['url'] = $this->link;

        $x = 0;
        do {
            $body = $this->GetBody($this->Request('http://bc.vc/api.php?'.http_build_query($options, '', '&')));
            $x++;
        } while (!empty($body) && $x < 3 && stripos($body, 'Unable to connect to database') !== false);
        return $this->ValidateURL($body);
    }

    protected function lnk_linkbucks($opts = null) {
        if (!function_exists('json_encode')) html_error('Error: Please enable JSON in php.');
        if (!$this->chkHttpsSupport()) html_error('Your cURL doesn\'t support https connections.');
        $options = array( // https://www.linkbucks.com/Profile
            'user' => 'Th3822', /* Your UserName */
            'apiPassword' => '23c02a93e403480b', /* Your ApiKey (Secret) */
            'adType' => 2, /* 2 = Ads ($) | 5 = No Ads (No $) */
            'contentType' => 1, /* 1: Clean | 2: Adult Content */
            'domain' => 'linkbucks.com' /* Alias Domain, full list is at https://www.linkbucks.com/CreateLinks/Single/ */
        );
        if (!is_null($opts) && is_array($opts)) $options = array_merge($options, $opts);
        if (empty($options['user']) || empty($options['apiPassword'])) return false;
        $options['originalLink'] = $this->link;

        $json = $this->json2array($this->Request('https://www.linkbucks.com/api/createLink/single', 0, json_encode($options))); // Alternate domain that supports API: www.linkbucksmedia.com
        return (!empty($json['link']) ? $this->ValidateURL($json['link']) : false);
    }

    protected function lnk_shortest($opts = null) {
        if (!$this->chkHttpsSupport()) html_error('Your cURL doesn\'t support https connections.');
        $options = array( // https://shorte.st/es/tools/api
            'key' => '567b51cd25df5567eb48709142876afd' /* Your ApiKey */
        );
        if (!is_null($opts) && is_array($opts)) $options = array_merge($options, $opts);
        if (empty($options['key'])) return false;

        $json = $this->json2array($this->Request('https://api.shorte.st/v1/data/url', 0, array('urlToShorten' => $this->link), "\r\nX-HTTP-Method-Override: PUT\r\nPublic-Api-Token: " . $options['key']));
        return (!empty($json['shortenedUrl']) ? str_ireplace('http://', 'https://', $this->ValidateURL($json['shortenedUrl'])) : false);
    }

    // Evilest shortener, annoys users with captchas.
    protected function lnk_ouoio($opts = null) {
        $options = array( // http://ouo.io/manage/tools/quick-link
            'key' => 'IsYbNk1X' /* Your ApiKey */
        );
        if (!is_null($opts) && is_array($opts)) $options = array_merge($options, $opts);
        if (empty($options['key'])) return false;

        $body = $this->GetBody($this->Request("http://ouo.io/api/{$options['key']}?s=" . urlencode($this->link)));
        return $this->ValidateURL($body);
    }

    protected function lnk_ppw($opts = null) {
        $options = array( // http://p.pw/publisher/tools.php
            'user' => '382635' /* Your UserId */
        );
        if (!is_null($opts) && is_array($opts)) $options = array_merge($options, $opts);
        if (empty($options['user'])) return false;
        $options['url'] = $this->link;

        $json = $this->json2array($this->Request('http://p.pw/API/write/get?' . http_build_query($options, '', '&')));
        return ((!empty($json['success']) && !empty($json['data']['url'])) ? $this->ValidateURL($json['data']['url']) : false);
    }
}

if (empty($_GET['path']) && empty($_GET['sha'])) {
    // Redirect to index.php when called without query.
    $Path = strtr(dirname($_SERVER['SCRIPT_NAME']), '\\', '/');
    if (empty($Path) || $Path == '.' || $Path == '/') $Path = '';
    else $Path = (substr($Path, 0, 1) == '/' ? $Path : "/$Path");
    $Path .= "/index.php";
    header("Location: $Path");
    exit;
} elseif (empty($_GET['path']) || empty($_GET['sha'])) html_error('Invalid download-link.');
$path = decrypt(base64_decode($_GET['path']));
if (sha1($path) != $_GET['sha']) html_error('Corrupted download-link.');

$path = strtr((in_array(substr($path, 0, 1), array('/', '\\')) ? $path : "/$path"), '\\', '/'); // Add start / to path and replace any backslash with a slash
$link = 'http://' . (isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : $_SERVER['SERVER_NAME']) . $path;
$shortener = new LinkConverter($link);
// Call Converters Here

//$shortener->MassConvert('adfly bcvc linkbucks shortest ouoio ppw');
//$shortener->Convert('ppw');

// Get Final Converted Link
$newLink = $shortener->GetLink();
if (headers_sent($filename, $line)) {
    // Show Error Message and Link to Continue.
    html_error('Headers Sent by: '.htmlspecialchars($filename).' @ Line #'.$line.'<br /><a href="'.htmlspecialchars($newLink).'">Click Here to Continue</a>');
} else {
    // Do Redirect
    header("Location: $newLink", true, 301);
    exit;
}

// Written by Th3-822
// Last Updated: 10/2/2017
// Added p.pw support