range.php
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<?php
/**
* ownCloud - Documents App
*
* @author Victor Dubiniuk
* @copyright 2013 Victor Dubiniuk victor.dubiniuk@gmail.com
*
* This file is licensed under the Affero General Public License version 3 or
* later.
*/
namespace OCA\Documents;
/**
* Class processing range HTTP request (partial download)
*/
class Download_Range extends \OCA\Documents\Download {
// Start of the range
protected $start;
// End of the range
protected $end;
/**
* Build download model to serve HTTP_RANGE
* @param type $view - filesystem view
* @param type $filepath - path to the file relative to this view root
*/
public function __construct($owner, $filepath){
$this->view = $this->getView($owner);
$this->filepath = $filepath;
}
/**
* Send the requested parts of the file
*/
public function sendResponse(){
if (!preg_match('/^bytes=\d*-\d*(,\d*-\d*)*$/', $_SERVER['HTTP_RANGE'])){
$this->sendNotSatisfiable();
}
$mimetype = $this->getMimeType();
$content = $this->view->file_get_contents($this->filepath);
$data = Filter::read($content, $mimetype);
$size = strlen($data['content']);
$ranges = explode(',', substr($_SERVER['HTTP_RANGE'], 6));
foreach ($ranges as $range){
$parts = explode('-', $range);
if ($parts[0]==='' && $parts[1]=='') {
$this->sendNotSatisfiable();
}
if ($parts[0]==='') {
$start = $size - $parts[1];
$end = $size - 1;
}
else {
$start = $parts[0];
$end = ($parts[1]==='') ? $size - 1 : $parts[1];
}
if ($start > $end){
$this->sendNotSatisfiable();
}
$buffer = substr($data['content'], $start, $end - $start);
$md5Sum = md5($buffer);
// send the headers and data
header("Content-Length: " . ($end - $start));
header("Content-md5: " . $md5Sum);
header("Accept-Ranges: bytes");
header('Content-Range: bytes ' . $start . '-' . ($end) . '/' . $size);
header("Connection: close");
header("Content-type: " . $data['mimetype']);
header('Content-Disposition: attachment; filename=' . $this->getFilename());
\OC_Util::obEnd();
echo $buffer;
flush();
}
}
/**
* Send 416 if we can't satisfy the requested ranges
*/
protected function sendNotSatisfiable(){
header('HTTP/1.1 416 Requested Range Not Satisfiable');
header('Content-Range: bytes */' . $this->getFilesize()); // Required in 416.
exit;
}
}