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<?php
/*
=====================================================
DataLife Engine - by SoftNews Media Group
-----------------------------------------------------
http://dle-news.ru/
-----------------------------------------------------
Copyright (c) 2004,2012 SoftNews Media Group
=====================================================
Данный код защищен авторскими правами
=====================================================
Файл: download.class.php
-----------------------------------------------------
Назначение: Скачивание файлов
=====================================================
*/
class download {
var $properties = array ('old_name' => "", 'new_name' => "", 'type' => "", 'size' => "", 'resume' => "", 'max_speed' => "" );
var $range = 0;
function download($path, $name = "", $resume = 0, $max_speed = 0) {
$name = ($name == "") ? substr( strrchr( "/" . $path, "/" ), 1 ) : $name;
$name = explode( "/", $name );
$name = end( $name );
$file_size = @filesize( $path );
$this->properties = array ('old_name' => $path, 'new_name' => $name, 'type' => "application/force-download", 'size' => $file_size, 'resume' => $resume, 'max_speed' => $max_speed );
if( $this->properties['resume'] ) {
if( isset( $_SERVER['HTTP_RANGE'] ) ) {
$this->range = $_SERVER['HTTP_RANGE'];
$this->range = str_replace( "bytes=", "", $this->range );
$this->range = str_replace( "-", "", $this->range );
} else {
$this->range = 0;
}
if( $this->range > $this->properties['size'] ) $this->range = 0;
} else {
$this->range = 0;
}
}
function download_file() {
if( $this->range ) {
header( $_SERVER['SERVER_PROTOCOL'] . " 206 Partial Content" );
} else {
header( $_SERVER['SERVER_PROTOCOL'] . " 200 OK" );
}
header( "Pragma: public" );
header( "Expires: 0" );
header( "Cache-Control: must-revalidate, post-check=0, pre-check=0");
header( "Cache-Control: private", false);
header( "Content-Type: " . $this->properties['type'] );
header( 'Content-Disposition: attachment; filename="' . $this->properties['new_name'] . '";' );
header( "Content-Transfer-Encoding: binary" );
if( $this->properties['resume'] ) header( "Accept-Ranges: bytes" );
if( $this->range ) {
header( "Content-Range: bytes {$this->range}-" . ($this->properties['size'] - 1) . "/" . $this->properties['size'] );
header( "Content-Length: " . ($this->properties['size'] - $this->range) );
} else {
header( "Content-Length: " . $this->properties['size'] );
}
header("Connection: close");
@ini_set( 'max_execution_time', 0 );
@set_time_limit();
$this->_download( $this->properties['old_name'], $this->range );
}
function _download($filename, $range = 0) {
@ob_end_clean();
if( ($speed = $this->properties['max_speed']) > 0 ) $sleep_time = (8 / $speed) * 1e6;
else $sleep_time = 0;
$handle = fopen( $filename, 'rb' );
fseek( $handle, $range );
if( $handle === false ) {
return false;
}
while ( ! feof( $handle ) ) {
print( fread( $handle, 1024 * 8 ) );
ob_flush();
flush();
usleep( $sleep_time );
}
fclose( $handle );
return true;
}
}
?>