/**
* Send data from a file based on the current Range header
*
* @param string $path Local file system path to serve
* @param string $contentType MIME type of the data stream
*/
public function sendFile($path, $contentType = 'application/octet-stream')
{
// Make sure the file exists and is a file, otherwise we are wasting our time
$localPath = realpath($path);
if ($localPath === false || !is_file($localPath)) {
throw new UpdraftPlus_NonExistentFileException($path . ' does not exist or is not a file');
}
// Make sure we can open the file for reading
if (!($fp = fopen($localPath, 'r'))) {
throw new UpdraftPlus_UnreadableFileException('Failed to open ' . $localPath . ' for reading');
}
$fileSize = filesize($localPath);
if ($this->range == null) {
// No range requested, just send the whole file
header('HTTP/1.1 200 OK');
$this->sendDownloadHeaders(basename($localPath), $fileSize, $contentType);
fpassthru($fp);
} else {
// Send the request range
header('HTTP/1.1 206 Partial Content');
header('Content-Range: ' . $this->range->getContentRangeHeader($fileSize));
$this->sendDownloadHeaders(basename($localPath), $this->range->getLength($fileSize), $contentType);
$this->sendDataRange($fp, $this->range->getStartPosition($fileSize), $this->range->getLength($fileSize));
}
fclose($fp);
}
public function spool_file($fullpath, $encryption = '')
{
@set_time_limit(900);
if (file_exists($fullpath)) {
// Prevent any debug output
// Don't enable this line - it causes 500 HTTP errors in some cases/hosts on some large files, for unknown reason
//@ini_set('display_errors', '0');
$spooled = false;
if ('.crypt' == substr($fullpath, -6, 6)) {
if (ob_get_level()) {
$flush_max = min(5, (int) ob_get_level());
for ($i = 1; $i <= $flush_max; $i++) {
@ob_end_clean();
}
}
header("Cache-Control: no-cache, must-revalidate");
// HTTP/1.1
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT");
// Date in the past
$this->spool_crypted_file($fullpath, (string) $encryption);
return;
}
$content_type = $this->get_mime_type_from_filename($fullpath, false);
require_once UPDRAFTPLUS_DIR . '/includes/class-partialfileservlet.php';
//Prevent the file being read into memory
if (ob_get_level()) {
$flush_max = min(5, (int) ob_get_level());
for ($i = 1; $i <= $flush_max; $i++) {
@ob_end_clean();
}
}
if (ob_get_level()) {
@ob_end_clean();
}
// Twice - see HS#6673 - someone at least needed it
if (isset($_SERVER['HTTP_RANGE'])) {
$range_header = trim($_SERVER['HTTP_RANGE']);
} elseif (function_exists('apache_request_headers')) {
foreach (apache_request_headers() as $name => $value) {
if (strtoupper($name) === 'RANGE') {
$range_header = trim($value);
}
}
}
if (empty($range_header)) {
header("Content-Length: " . filesize($fullpath));
header("Content-type: {$content_type}");
header("Content-Disposition: attachment; filename=\"" . basename($fullpath) . "\";");
readfile($fullpath);
return;
}
try {
$range_header = UpdraftPlus_RangeHeader::createFromHeaderString($range_header);
$servlet = new UpdraftPlus_PartialFileServlet($range_header);
$servlet->sendFile($fullpath, $content_type);
} catch (UpdraftPlus_InvalidRangeHeaderException $e) {
header("HTTP/1.1 400 Bad Request");
error_log("UpdraftPlus: UpdraftPlus_InvalidRangeHeaderException: " . $e->getMessage());
} catch (UpdraftPlus_UnsatisfiableRangeException $e) {
header("HTTP/1.1 416 Range Not Satisfiable");
} catch (UpdraftPlus_NonExistentFileException $e) {
header("HTTP/1.1 404 Not Found");
} catch (UpdraftPlus_UnreadableFileException $e) {
header("HTTP/1.1 500 Internal Server Error");
}
} else {
echo __('File not found', 'updraftplus');
}
}
