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