HTTP If-Modified-Since Header

By: Dusty Arlia
Published on Sunday, April 13, 2014, 06:38 PM
Last Updated on Saturday, July 11, 2015 at 2:36 PM
Total Updates: 3

The If-Modified-Since HTTP header allows a 304 Not Modified HTTP server response code to be returned if content is unchanged.

Here is an example:

If-Modified-Since: Sat, 29 Oct 1994 19:43:31 GMT