/**
* Make image response.
*
* @param $file
* @return \Illuminate\Http\Response
*/
public function image($file)
{
$image = $this->document->image($file);
$reqEtag = Request::getEtags();
$genEtag = $this->document->etag($file);
if (isset($reqEtag[0])) {
if ($reqEtag[0] === $genEtag) {
return response('', 304);
}
}
return response($image->encode('png'), 200, ['Content-Type' => 'image/png', 'Cache-Control' => 'public, max-age=0', 'Etag' => $genEtag]);
}