How to read pdf instead of downloading?

I want display a PDF file instead of downloading it. I tried using an iframe, embed, pdfObject jQuery plugin, and PDF.js. I used Google Docs iframe and also tried this but both gives the same error,

Sorry, The page you are looking for could not be found.

NotFoundHttpException

1st:

return response()->file($path);

2nd:

return \Response::make(file_get_contents($path), 200, [
 'Content-Type' => 'application/pdf',
 'Content-Disposition' => 'inline; filename="' . $filename . '"'
]);