<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */

/**
 * Download Manager - Download Script
 *
 * Simple download manager for Joomla! CMS
 * Download Script for ionFiles
 *
 * PHP versions 4 and 5
 *
 *
 * @category   CategoryName
 * @package    PackageName
 * @author     jordan DeLozier <http://www.codecall.net>
 * @copyright  1997-2005 CodeCall / Jordan DeLozier
 * @link       http://www.codecall.net
 */

/*
 * Place includes, constant defines and $_GLOBAL settings here.
 * Make sure they have appropriate docblocks to avoid phpDocumentor
 * construing they are documented by the page-level docblock.
 ***********************************************************************/

// Mod below - commented out unneeded crap

# Disable all warnings
#------------------------------------
/*error_reporting(0);

# Get our file download information
#------------------------------------
$file = $_GET['file'];
$download = $_GET['download'];
 
# Run Checks
#----------------------------
if ($file == "") {
  print "Error: No File Selected";
  die();
}*/


// Mod blow, added function header
function startDownload($file, $download) {
    
# Make sure program execution doesn't time out
#-------------------------------
set_time_limit(0);
				
# Get the filename to be downloaded
#----------------------------------
$file = stripslashes($file);
$file = htmlspecialchars($file);
		
# file extension
#-----------------------------------
$fext = strtolower(substr(strrchr($file,"."),1));

# Get the File Size
#-----------------------------------
//$fsize = remotefsize($file);   
    
# Get the mime type
#------------------------------------
$mtype = getmtype($fext);

# Check to see if the file is a link or download
#-------------------------------------------------
if ($download == 1) {	  
		  header("Pragma:  no-cache");
		  header("Expires: 0");
		  header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
		  header("Cache-Control: public");
		  header("Content-Description: File Transfer");
		  header("Content-type: $mtype");
		  header("Content-Transfer-Encoding: binary"); 
		  header("Content-Disposition: attachment; filename=\"".basename($file)."\"");
			
			
		  if (ini_get('allow_url_fopen')) {
        if (extension_loaded('curl')) {
        		header("Content-Length: " . remotefsize($file));  
        }
     }
      
			header("Accept-Ranges: bytes");
			@readfile("$file");
			
}
else {
		# Forward the user to the file
		#--------------------------------------------------
		header("Location: " .$file);
}

}
////////////////////////////////////////////////////////////
// Get the mtype
////////////////////////////////////////////////////////////
function getmtype($fext) {

    # Mime Types
    #-------------------------------
		$mine_types = array (
		
       # archives
       #-------------------------------
      'zip' => 'application/zip',

      # documents
      #-------------------------------
      'pdf' => 'application/pdf',
      'doc' => 'application/msword',
      'xls' => 'application/vnd.ms-excel',
      'ppt' => 'application/vnd.ms-powerpoint',
      
      # executables
      #-------------------------------
      'exe' => 'application/octet-stream',

      # images
      #-------------------------------
      'gif' => 'image/gif',
      'png' => 'image/png',
      'jpg' => 'image/jpeg',
      'jpeg' => 'image/jpeg',

      # audio
      #-------------------------------
      'mp3' => 'audio/mpeg',
      'wav' => 'audio/x-wav',

      # video
      #-------------------------------
      'mpeg' => 'video/mpeg',
      'mpg' => 'video/mpeg',
      'mpe' => 'video/mpeg',
      'mov' => 'video/quicktime',
      'avi' => 'video/x-msvideo'
      
    );

    # Find the Mime Type
    #-------------------------------
    if ($mine_types[$fext] == '') {
      $mtype = '';
      
      # mime type is not set, get from server settings
      #-------------------------------
      if (function_exists('mime_content_type')) {
        $mtype = mime_content_type($file);
      }
      else 
      {
        $mtype = "application/force-download";
      }
    
    }
    else {
      # get mime type defined by admin
      #-------------------------------
      $mtype = $mine_types[$fext];
    }
    
    # Return our Type
    #-------------------------------
    return $mtype;
}

////////////////////////////////////////////////////////////
// Filesize of remote file
// Grab the filesize of a file hosted on another server
////////////////////////////////////////////////////////////
function remotefsize($url, $user = "", $pw = "")  {
    ob_start();
    $ch = curl_init($url);
    curl_setopt($ch, CURLOPT_HEADER, 1);
    curl_setopt($ch, CURLOPT_NOBODY, 1);

    if(!empty($user) && !empty($pw))

    {
    	$headers = array('Authorization: Basic ' . base64_encode("$user:$pw"));
    	curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    }
  

    $ok = curl_exec($ch);
    curl_close($ch);
    $head = ob_get_contents();
    ob_end_clean();
    
    $regex = '/Content-Length:\s([0-9].+?)\s/';
    $count = preg_match($regex, $head, $matches);
     
    return isset($matches[1]) ? $matches[1] : "unknown";
}


// Old Code - PHP 5 only
/* function remotefsize($url) {

        if (ini_get('allow_url_fopen')) {
          $schemed = parse_url($url);
          $sch = $schemed['scheme'];
          
          //$sch = parse_url($url, PHP_URL_SCHEME);
          
          if (($sch != "http") && ($sch != "https") && ($sch != "ftp") && ($sch != "ftps")) {
              return false;
          }
          if (($sch == "http") || ($sch == "https")) {
              $headers = get_headers($url, 1);
              if ((!array_key_exists("Content-Length", $headers))) { return false; }
              return $headers["Content-Length"];
          }
          if (($sch == "ftp") || ($sch == "ftps")) {
              $parsed = parse_url($url);
              $server = $parsed['host'];
              $port = $parsed['port'];
              $path = $parsed['path'];
              $user = $parsed['user'];
              $pass = $parsed['pass'];
              
              /* PHP 5.0++ Code 
              $server = parse_url($url, PHP_URL_HOST);
              $port = parse_url($url, PHP_URL_PORT);
              $path = parse_url($url, PHP_URL_PATH);
              $user = parse_url($url, PHP_URL_USER);
              $pass = parse_url($url, PHP_URL_PASS);
              
              if ((!$server) || (!$path)) { return false; }
              if (!$port) { $port = 21; }
              if (!$user) { $user = "anonymous"; }
              if (!$pass) { $pass = "phpos@"; }
              switch ($sch) {
                  case "ftp":
                      $ftpid = ftp_connect($server, $port);
                      break;
                  case "ftps":
                      $ftpid = ftp_ssl_connect($server, $port);
                      break;
              }
              if (!$ftpid) { return false; }
              $login = ftp_login($ftpid, $user, $pass);
              if (!$login) { return false; }
              $ftpsize = ftp_size($ftpid, $path);
              ftp_close($ftpid);
              if ($ftpsize == -1) { return false; }
              return $ftpsize;
          }
        }
        else
        {
           return false;
        }
    } */

?>