[TYPO3-english] How to add Last-Modified to header

[Ilya Smirnoff]

Hello Patrick!
Thanks for your explanation!
Now all is clear...

2015-05-01 17:32 GMT+03:00 Patrick Broens <patrick.broens at typo3.org>:

> Hi Ilya,
>
> The Last-Modified header has recently been taken out by me, because the
> whole approach was broken by design. I don't know which version you are
> using, but it is gone since the latest version 7.2 and 6.2.12.
>
> I'm not going to sum up the whole story (I have a document of a few
> pages describing the problem), but you could get in big problems when
> you are using this header. Pages will never be cleared in the browser
> cache of your visitors, which will lead to unexpected things.
>
> Imagine you have page A: showing news records or other content from a
> different page or folder B. In page B the changes are noticed by the
> system, but not in page A. When you are not changing anything on page A
> for a long time, the Last-Modified header will stay on the same date
> forever. I had this with a very big university website. Totally uncool
> and you don't know what is happening.
>
> As I wrote, it is broken by design and hard to get it right in the TYPO3
> CMS core.
>
> Still, the ETag header is there, serving kind of the same purpose.
>
> But you are writing you are using 6.2.9. If the ETag and Last-Modified
> header are not there, then they are removed probably by the webserver,
> not TYPO3 CMS. When using Apache it is possible to remove them using
> .htaccess with mod_headers, like "Header unset Last-Modified".
>
> And keep in mind pages should be cached in the TYPO3 cache, otherwise
> these headers will not be send at all. I do not see the Expires header
> or Cache-Control with a max-age, which tells me that you are not caching
> the page, so it is not allowed to be cached client side as well.
>
> Cheers
>
> Patrick
>
> On 30-4-15 15:30 , Ilya Smirnoff wrote:
> > Nobody knows?
> > Or usual this header must be add by default?
> >
> > 2015-04-29 22:42 GMT+03:00 Ilya Smirnoff <ilya.smirnoff at gmail.com>:
> >
> >> Hello!I tring add Last-Modified to header of my site based on TYPO3
> 6.2.9
> >> and RealURL.
> >> But not success :(
> >> I add to my TS setup this:
> >> config
> >> {
> >> no_cache = 0
> >> sendCacheHeaders=1
> >> enableContentLengthHeader = 1
> >> cache_period = 100
> >> cache_clearAtMidnight = 1
> >> }
> >> But it's doesn't work for me and server answer is:
> >> HTTP/1.1 200 OK
> >> Date: Wed, 29 Apr 2015 10:54:31 GMT
> >> Server: Apache/2.2.22 (Debian)
> >> X-Powered-By: PHP/5.5.20-1~dotdeb.1
> >> Cache-Control: private
> >> Content-Length: 195968
> >> Vary: Accept-Encoding
> >> Connection: close
> >> Content-Type: text/html; charset=utf-8
> >>
> >> How I can add something like this:
> >> Last-Modified: Wed, 29 Apr 2015 10:48:39 GMT
> >>
> >> Thanks in advance.
> >> _______________________________________________
> >> TYPO3-english mailing list
> >> TYPO3-english at lists.typo3.org
> >> http://lists.typo3.org/cgi-bin/mailman/listinfo/typo3-english
> >>
>
>
> --
> Patrick Broens
> TYPO3 Core Team member
>
> TYPO3 .... inspiring people to share!
> Get involved: typo3.org
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