Request #1 Headers
===================
GET /file1.txt HTTP/1.1
Range: bytes=0-999
Response #1 Headers
===================
HTTP/1.1 200 OK
Date: Tue, 01 Mar 2016 22:44:26 GMT
Last-Modified: Wed, 30 Jun 2015 21:36:48 GMT
Expires: Tue, 01 Mar 2016 22:44:26 GMT
Cache-Control: private, max-age=31536000
Content-Range: bytes 0-999/1000
Request #2 Headers
===================
GET /file1.txt HTTP/1.1
If-Modified-Since: Wed, 30 Jun 2010 21:36:48 GMT
Response #2 Headers
===================
HTTP/1.1 304 Not Modified
Date: Tue, 01 Mar 2011 22:44:28 GMT