2 http://example.com/modified.txt
4 GET /modified.txt HTTP/1.1
7 If-Modified-Since: Tue, 01 Feb 1994 00:00:00 GMT
8 User-Agent: HTTP-Tiny/VERSION
12 Date: Thu, 03 Feb 1994 00:00:00 GMT
13 Last-Modified: Wed, 02 Feb 1994 00:00:00 GMT
14 Content-Type: text/plain
17 abcdefghijklmnopqrstuvwxyz1234567890abcdef