gest366/ForceDownload.class.php

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PHP
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2021-02-24 20:40:04 +00:00
<?php
Class ForceDownload{
public $filename;
public $dir;
public $path;
public $download_name;
public $size;
public $time_file;
public $mime_type;
public $extension;
public $http_reponse;
public function __construct($dir, $filename){
$dir = trim( (string) $dir );
$this->dir = (string) $dir;
$this->filename = basename( (string) $filename );
$this->path = $this->dir . $this->filename;
$this->download_name = $this->filename;
$this->mime_type = 'application/octet-stream';
// checking file
$this->file_checked();
}
protected function file_checked(){
if( $this->filename == '' ){
$this->http_reponse = 406; // not acceptable
return FALSE;
}
if( !is_file($this->path) ){
$this->http_reponse = 404; // not found
return FALSE;
}
else if( !is_readable($this->path) ){
$this->http_reponse = 403; // forbidden
return FALSE;
}
$info = pathinfo( $this->path );
$this->extension = $info['extension'];
$this->size = filesize($this->path);
$this->time_file = date( 'r', filemtime( $this->path ) );
$this->http_reponse = 200;
return TRUE;
}
protected function headers_for_download(){
header('Content-Type: ' . $this->mime_type);
header('Content-Disposition: attachment; filename="'. $this->download_name .'"');
header('Content-Transfer-Encoding: binary');
header('Content-Length: ' . $this->size);
header('Last-Modified: ' . $this->time_file);
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
return;
}
public function set_download_name($name){
$this->download_name = preg_replace(
array("/\s+/", "/[^-\.\w]+/"),
array("_", ""),
trim($name));
}
public function download(){
if( $this->http_reponse === 200 ){
$this->headers_for_download();
/*end headers*/
if( !@readfile( $this->path ) ){
$this->http_reponse = 500; // internal server error
return FALSE;
}
return TRUE;
}
return FALSE;
}
public function get_error(){
switch($this->http_reponse){
case 200: $error = null; break;
case 406: $error = 'Undefined file'; break;
case 404: $error = 'File not found'; break;
case 403: $error = 'Access denied'; break;
default: $error = 'Unknown error'; break;
}
return $error;
}
}