Title: 304 Not Modified?????
Last modified: August 30, 2016

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# 304 Not Modified?????

 *  Resolved [Dimkox](https://wordpress.org/support/users/dimkox/)
 * (@dimkox)
 * [10 years, 9 months ago](https://wordpress.org/support/topic/304-not-modified/)
 * Hi! Test this Plugin:
    Last-Modified found! HTTP/1.1 200 OK Date: Mon, 14 Sep
   2015 00:51:37 GMT Server: Apache/2.2.22 (Debian) X-Powered-By: PHP/5.4.45-0+deb7u1
   X-Pingback: [http://magistr911.ru/](http://magistr911.ru/) Last-Modified: Sat,
   04 Jul 2015 13:37:54 GMT ETag: “ee1772516390e62a8a03492b1dfd3071c83ab48f” Link:;
   rel=shortlink Expires: Tue, 15 Sep 2015 00:51:39 GMT Cache-Control: public, max-
   age=86400 Pragma: cache Vary: Accept-Encoding Connection: close Content-Type:
   text/html; charset=UTF-8 —– Получено: 485 байт Затрачено: 1,53 сек
 * Yep, its OK, but:
 * 304 Not Modified not found!
    HTTP/1.1 200 OK Date: Mon, 14 Sep 2015 00:51:39 
   GMT Server: Apache/2.2.22 (Debian) X-Powered-By: PHP/5.4.45-0+deb7u1 X-Pingback:
   [http://magistr911.ru/](http://magistr911.ru/) Last-Modified: Sat, 04 Jul 2015
   13:37:54 GMT ETag: “ee1772516390e62a8a03492b1dfd3071c83ab48f” Link: ; rel=shortlink
   Expires: Tue, 15 Sep 2015 00:51:40 GMT Cache-Control: public, max-age=86400 Pragma:
   cache Vary: Accept-Encoding Connection: close Content-Type: text/html; charset
   =UTF-8 Получено: 485 байт Затрачено: 1,17 сек
 * Why?
 * [https://wordpress.org/plugins/add-headers/](https://wordpress.org/plugins/add-headers/)

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Author [George Notaras](https://wordpress.org/support/users/gnotaras/)
 * (@gnotaras)
 * [10 years, 9 months ago](https://wordpress.org/support/topic/304-not-modified/#post-6541802)
 * Hi,
 * May I ask how you are testing it?
 * In order to get the `304 Not Modified` response from the server, you have to 
   sent it a date to compare by including the `If-Modified-Since` in the request
   headers.
 * In order to test, ask the server if the document has been modified since Sun,
   12 Oct 2014 09:00:00 GMT (example date) with the following:
 *     ```
       curl -I -L -H "If-Modified-Since: Sun, 12 Oct 2014 09:00:00 GMT" http://example.org/sample-page/
       ```
   
 * If the document’s `Last-Modified` date is older than the above, the `304` status
   should be returned by the server.
 * Hope this helps. Please let me know if it works as expected.
 * Kind Regards,
    George
 *  Plugin Author [George Notaras](https://wordpress.org/support/users/gnotaras/)
 * (@gnotaras)
 * [10 years, 9 months ago](https://wordpress.org/support/topic/304-not-modified/#post-6542013)
 * By now I assume that you have finally managed to perform the header checking 
   properly.
 * I’ll mark the topic as resolved. If you need more help, feel free to ask.
 * George
 *  [Sergiy](https://wordpress.org/support/users/se8pro/)
 * (@se8pro)
 * [8 years, 11 months ago](https://wordpress.org/support/topic/304-not-modified/#post-9282036)
 * Please add support for the output – If-Modified-Since – 304
    You can test at 
   last-modified.com

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘304 Not Modified?????’ is closed to new replies.

 * ![](https://s.w.org/plugins/geopattern-icon/add-headers.svg)
 * [Add Headers](https://wordpress.org/plugins/add-headers/)
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 * 3 replies
 * 3 participants
 * Last reply from: [Sergiy](https://wordpress.org/support/users/se8pro/)
 * Last activity: [8 years, 11 months ago](https://wordpress.org/support/topic/304-not-modified/#post-9282036)
 * Status: resolved