This plugin is outdated and might not be supported anymore
Last-Modified and If-Modified-Since Headers

Last-Modified and If-Modified-Since Headers

By zubovd
Details
View on WordPress

This plugin adds the ‘Last-Modified’ header to each post and returns the ‘304 Not Modified’ header to the client without a body in the response if he sent the ‘If-Modified-Since’ header and the post has not changed since that date.

Details

Plugin code:
last-modified-and-if-modified-since-headers
Plugin version:
1.0
Author:
Outdated:
Yes
WP version:
5.2.4 or higher
PHP version:
or higher
Test up to WP version:
5.7.12
Total installations:
200
Last updated:
2021-07-20
Rating:
Times rated:
2
headers
if-modified-since
last-modified