Very usefull package but in order to not corrupt the download...

Very usefull package but in order to not corrupt the download file or receive a error message like "file not found" i suggest everybody to rewrite the class method public function download_file() as:

public function download_file(){
if ( $this->properties['path'] == "" ) // if the path is unset, then error !
echo "Nothing to download!";
else {
// if resuming is allowed ...
if ($this->properties["resume"] == "on") {
if(isset($_SERVER['HTTP_RANGE'])) { // check if http_range is sent by browser (or download manager)
list($a, $range)=explode("=",$_SERVER['HTTP_RANGE']);
ereg("([0-9]+)-([0-9]*)/?([0-9]*)",$range,$range_parts); // parsing Range header
$byte_from = $range_parts [1]; // the download range : from $byte_from ...
$byte_to = $range_parts [2]; // ... to $byte_to
} else{
if(isset($_ENV['HTTP_RANGE'])) { // some web servers do use the $_ENV['HTTP_RANGE'] instead
list($a, $range)=explode("=",$_ENV['HTTP_RANGE']);
ereg("([0-9]+)-([0-9]*)/?([0-9]*)",$range,$range_parts); // parsing Range header
$byte_from = $range_parts [1]; // the download range : from $byte_from ...
$byte_to = $range_parts [2]; // ... to $byte_to
}else{
$byte_from = 0; // if no range header is found, download the whole file from byte 0 ...
$byte_to = $this->properties["size"] - 1; // ... to the last byte
}
}
if ($byte_to == ""){ // if the end byte is not specified, ...
$byte_to = $this->properties["size"] -1; // ... set it to the last byte of the file
header("HTTP/1.1 206 Patial Content"); } // send the partial content header
// ... else, download the whole file
} else {
$byte_from = 0;
$byte_to = $this->properties["size"] - 1;
}

$download_range = $byte_from."-".$byte_to."/".$this->properties["size"]; // the download range
$download_size = $byte_to - $byte_from; // the download length

// download speed limitation
if (($speed = $this->properties["max_speed"]) > 0) // determine the max speed allowed ...
$sleep_time = (8 / $speed) * 1e6; // ... if "max_speed" = 0 then no limit (default)
else
$sleep_time = 0;

// send the headers
header("Pragma: public"); // purge the browser cache
header("Expires: 0"); // ...
header("Cache-Control:"); // ...
header("Cache-Control: public"); // ...
header("Content-Description: File Transfer"); //
header("Content-Type: ".$this->properties["type"]); // file type
header('Content-Disposition: attachment; filename="'.$this->properties["name"].'";');
header("Content-Transfer-Encoding: binary"); // transfer method
header("Content-Range: $download_range"); // download range
header("Content-Length: $download_size"); // download length

// send the file content
$fp=fopen($this->properties["path"],"r"); // open the file
if(!$fp) exit; // if $fp is not a valid stream resource, exit
fseek($fp,$byte_from); // seek to start of missing part
while(!feof($fp)){ // start buffered download
set_time_limit(0); // reset time limit for big files (has no effect if php is executed in safe mode)
print(fread($fp,1024*8)); // send 8ko
flush();
usleep($sleep_time); // sleep (for speed limitation)
}
fclose($fp); // close the file
exit;
}