/** * {@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(); }