HTTP/1.1 200 OK Date: Tue, 25 Jun 2019 07:32:36 GMT Server: Apache/2.4.9 (Win64) PHP/5.5.12 Last-Modified: Sat, 13 Jun 2015 02:21:04 GMT ETag: "0-5185ce0600400" Accept-Ranges: bytes Content-Length: 0 Content-Type: application/pdf