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<?php
/**
* Created by PhpStorm.
* User: ray
* Date: 12/06/2018
* Time: 14:29
*/
// hide notices
@ini_set('error_reporting', E_ALL & ~ E_NOTICE);
//- turn off compression on the server
@apache_setenv('no-gzip', 1);
@ini_set('zlib.output_compression', 'Off');
class Download_model extends CI_Model{
function __construct(){
parent::__construct();
}
public function load($id){
$this->db->select('tbl_media.source,tbl_media.type');
$this->db->from('tbl_media');
$this->db->where('id',$id);
$query = $this->db->get();
$row = $query->row();
if(count((array)$row) > 0){
if($row->type == "audio"){
$path = './uploads/audios/'.$row->source;
$file_ext = "mp3";
}else{
$file_ext = "mp4";
$path = './uploads/videos/'.$row->source;
}
$this->serve_file($row->source,$file_ext,$path);
}else{
header("HTTP/1.0 400 Bad Request");
exit;
}
}
private function serve_file($file_name,$file_ext,$file_path){
// make sure the file exists
if (is_file($file_path))
{
clearstatcache();
$file_size = filesize($file_path);
$file = @fopen($file_path,"rb");
if ($file)
{
// set the headers, prevent caching
header("Pragma: public");
header("Expires: -1");
header("Cache-Control: public, must-revalidate, post-check=0, pre-check=0");
header("Content-Disposition: attachment; filename=\"$file_name\"");
header('Last-Modified: '.gmdate('D, d M Y H:i:s', filemtime($file_path)).' GMT', true, 200);
header('Content-Disposition: inline;');
header('Content-Transfer-Encoding: binary');
// set the mime type based on extension, add yours if needed.
$ctype_default = "application/octet-stream";
$content_types = array(
"mp3" => "audio/mpeg",
"mp4" => "video/mp4",
);
$ctype = isset($content_types[$file_ext]) ? $content_types[$file_ext] : $ctype_default;
header("Content-Type: " . $ctype);
$req_headers = apache_request_headers();
//check if http_range is sent by browser (or download manager)
if(isset($req_headers['HTTP_RANGE']))
{
list($size_unit, $range_orig) = explode('=', $req_headers['HTTP_RANGE'], 2);
if ($size_unit == 'bytes')
{
//multiple ranges could be specified at the same time, but for simplicity only serve the first range
//http://tools.ietf.org/id/draft-ietf-http-range-retrieval-00.txt
list($range, $extra_ranges) = explode(',', $range_orig, 2);
}
else
{
$range = '';
header('HTTP/1.1 416 Requested Range Not Satisfiable');
exit;
}
}
else
{
$range = '';
}
//$myfile = fopen("./uploads/newfile.txt", "w") or die("Unable to open file!");
//fwrite($myfile, $range);
//fclose($myfile);die;
//figure out download piece from range (if set)
list($seek_start, $seek_end) = explode('-', $range, 2);
//set start and end based on range (if set), else set defaults
//also check for invalid ranges.
$seek_end = (empty($seek_end)) ? ($file_size - 1) : min(abs(intval($seek_end)),($file_size - 1));
$seek_start = (empty($seek_start) || $seek_end < abs(intval($seek_start))) ? 0 : max(abs(intval($seek_start)),0);
//Only send partial content header if downloading a piece of the file (IE workaround)
if ($seek_start > 0 || $seek_end < ($file_size - 1))
{
header('HTTP/1.1 206 Partial Content');
header('Content-Range: bytes '.$seek_start.'-'.$seek_end.'/'.$file_size);
//header('Content-Length: '.($seek_end - $seek_start + 1));
header("Content-Length: $file_size");
}
else
header("Content-Length: $file_size");
header('Accept-Ranges: bytes');
set_time_limit(0);
fseek($file, $seek_start);
while(!feof($file))
{
print(@fread($file, 1024*8));//8
ob_flush();
flush();
if (connection_status()!=0)
{
@fclose($file);
clearstatcache();
exit;
}
}
// file save was a success
@fclose($file);
clearstatcache();
exit;
}
else
{
// file couldn't be opened
header("HTTP/1.0 500 Internal Server Error");
exit;
}
}
else
{
// file does not exist
header("HTTP/1.0 404 Not Found");
exit;
}
}
}
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