/**
* {@inheritdoc}
*/
public function prepare(Request $request)
{
$this->headers->set('Content-Length', $this->file->getSize());
if (!$this->headers->has('Accept-Ranges')) {
// Only accept ranges on safe HTTP methods
$this->headers->set('Accept-Ranges', $request->isMethodSafe() ? 'bytes' : 'none');
}
if (!$this->headers->has('Content-Type')) {
$this->headers->set('Content-Type', $this->file->getMimetype() ?: 'application/octet-stream');
}
if ('HTTP/1.0' != $request->server->get('SERVER_PROTOCOL')) {
$this->setProtocolVersion('1.1');
}
$this->ensureIEOverSSLCompatibility($request);
$this->offset = 0;
$this->maxlen = -1;
if ($request->headers->has('Range')) {
// Process the range headers.
if (!$request->headers->has('If-Range') || $this->getEtag() == $request->headers->get('If-Range')) {
$range = $request->headers->get('Range');
$fileSize = $this->file->getSize();
list($start, $end) = explode('-', substr($range, 6), 2) + array(0);
$end = '' === $end ? $fileSize - 1 : (int) $end;
if ('' === $start) {
$start = $fileSize - $end;
$end = $fileSize - 1;
} else {
$start = (int) $start;
}
if ($start <= $end) {
if ($start < 0 || $end > $fileSize - 1) {
$this->setStatusCode(416);
} elseif ($start !== 0 || $end !== $fileSize - 1) {
$this->maxlen = $end < $fileSize ? $end - $start + 1 : -1;
$this->offset = $start;
$this->setStatusCode(206);
$this->headers->set('Content-Range', sprintf('bytes %s-%s/%s', $start, $end, $fileSize));
$this->headers->set('Content-Length', $end - $start + 1);
}
}
}
}
return $this;
}
/**
* Checks whether the method is safe or not.
*
* @return bool
*
* @api
*/
public function isMethodSafe()
{
return parent::isMethodSafe();
}
