/**
* {@inheritdoc}
*/
public function send(Request $request, Response $response)
{
// Add headers that should always be included
$response->type($this->options['content_type']);
$response->header('accept-ranges', $request->isSafe() ? 'bytes' : 'none');
$response->header('content-disposition', $this->options['disposition'] . '; filename="' . $this->options['file_name'] . '"');
// Get the requested byte range
$range = $request->header('range');
if ($range !== null) {
$range = $this->calculateRange($range);
}
if ($range === false) {
// Not an acceptable range so we'll just send an empty response
// along with a "requested range not satisfiable" status
$response->status(416);
$response->sendHeaders();
} else {
if ($range === null) {
// No range was provided by the client so we'll just fake one for the sendFile method
// and set the content-length header value to the full file size
$range = ['start' => 0, 'end' => $this->fileSize - 1];
$response->header('content-length', $this->fileSize);
} else {
// Valid range so we'll need to tell the client which range we're sending
// and set the content-length header value to the length of the byte range
$response->status(206);
$response->header('content-range', sprintf('bytes %s-%s/%s', $range['start'], $range['end'], $this->fileSize));
$response->header('content-length', $range['end'] - $range['start'] + 1);
}
// Send headers and the requested byte range
$response->sendHeaders();
$this->sendFile($range['start'], $range['end']);
// Execute callback if there is one
if (!empty($this->options['callback'])) {
$this->options['callback']($this->filePath);
}
}
}
