1url
2  http://example.com/modified.txt
3headers
4  if-modified-since: Tue, 01 Feb 1994 12:00:00 GMT
5----------
6GET /modified.txt HTTP/1.1
7Host: example.com
8Connection: close
9If-Modified-Since: Tue, 01 Feb 1994 12:00:00 GMT
10User-Agent: HTTP-Tiny/VERSION
11
12----------
13HTTP/1.1 200 OK
14Date: Thu, 03 Feb 1994 00:00:00 GMT
15Last-Modified: Wed, 02 Feb 1994 00:00:00 GMT
16Content-Type: text/plain
17Content-Length: 42
18
19abcdefghijklmnopqrstuvwxyz1234567890abcdef
20
21