Elgg\Application\ServeFileHandler::getResponse PHP Метод

    public function getResponse(Request $request)
    {
        $response = new Response();
        $response->prepare($request);
        $path = implode('/', $request->getUrlSegments());
        if (!preg_match('~serve-file/e(\\d+)/l(\\d+)/d([ia])/c([01])/([a-zA-Z0-9\\-_]+)/(.*)$~', $path, $m)) {
            return $response->setStatusCode(400)->setContent('Malformatted request URL');
        }
        list(, $expires, $last_updated, $disposition, $use_cookie, $mac, $path_from_dataroot) = $m;
        if ($expires && $expires < time()) {
            return $response->setStatusCode(403)->setContent('URL has expired');
        }
        $hmac_data = array('expires' => (int) $expires, 'last_updated' => (int) $last_updated, 'disposition' => $disposition, 'path' => $path_from_dataroot, 'use_cookie' => (int) $use_cookie);
        if ((bool) $use_cookie) {
            $hmac_data['cookie'] = $this->getCookieValue($request);
        }
        ksort($hmac_data);
        $hmac = $this->crypto->getHmac($hmac_data);
        if (!$hmac->matchesToken($mac)) {
            return $response->setStatusCode(403)->setContent('HMAC mistmatch');
        }
        $dataroot = $this->config->getDataPath();
        $filenameonfilestore = "{$dataroot}{$path_from_dataroot}";
        if (!is_readable($filenameonfilestore)) {
            return $response->setStatusCode(404)->setContent('File not found');
        }
        $actual_last_updated = filemtime($filenameonfilestore);
        if ($actual_last_updated != $last_updated) {
            return $response->setStatusCode(403)->setContent('URL has expired');
        }
        $if_none_match = $request->headers->get('if_none_match');
        if (!empty($if_none_match)) {
            // strip mod_deflate suffixes
            $request->headers->set('if_none_match', str_replace('-gzip', '', $if_none_match));
        }
        $etag = '"' . $actual_last_updated . '"';
        $response->setPublic()->setEtag($etag);
        if ($response->isNotModified($request)) {
            return $response;
        }
        $public = $use_cookie ? false : true;
        $content_disposition = $disposition == 'i' ? 'inline' : 'attachment';
        $headers = ['Content-Type' => (new MimeTypeDetector())->getType($filenameonfilestore)];
        $response = new BinaryFileResponse($filenameonfilestore, 200, $headers, $public, $content_disposition);
        $sendfile_type = $this->config->getVolatile('X-Sendfile-Type');
        if ($sendfile_type) {
            $request->headers->set('X-Sendfile-Type', $sendfile_type);
            $mapping = (string) $this->config->getVolatile('X-Accel-Mapping');
            $request->headers->set('X-Accel-Mapping', $mapping);
            $response->trustXSendfileTypeHeader();
        }
        $response->prepare($request);
        if (empty($expires)) {
            $expires = strtotime('+1 year');
        }
        $expires_dt = (new DateTime())->setTimestamp($expires);
        $response->setExpires($expires_dt);
        $response->setEtag($etag);
        return $response;
    }

 /**
  * @group FileService
  */
 public function testResponseHeadersMatchFileAttributesForAttachmentUrls()
 {
     $file = new \Elgg\FileService\File();
     $file->setFile($this->file);
     $file->setDisposition('attachment');
     $file->bindSession(true);
     $request = $this->createRequest($file);
     $response = $this->handler->getResponse($request);
     $this->assertEquals('text/plain', $response->headers->get('Content-Type'));
     $filesize = filesize($this->file->getFilenameOnFilestore());
     $this->assertEquals($filesize, $response->headers->get('Content-Length'));
     $this->assertContains('attachment', $response->headers->get('Content-Disposition'));
     $this->assertEquals('"' . filemtime($this->file->getFilenameOnFilestore()) . '"', $response->headers->get('Etag'));
 }