Bug #63821
open
Story #63815: Reduce communication between server and client
HTTP header status 200 should be 304 when cached page not modified
Added by Patrick Broens over 9 years ago.
Updated about 2 years ago.
Description
When a cached page is requested, a "Last-Modified" header is sent with the response, based on the SYS_LASTCHANGED field of the page.
The server response always has a "HTTP/1.1 200 OK" status
There is no check if the browser request comes with a "If-Modified-Since" header. If so, It should be compared with SYS_LASTCHANGED. If the date of SYS_LASTCHANGED is earlier or equal than "If-Modified-Since", it should return a "HTTP/1.1 304 Not Modified" status, instead of "HTTP/1.1 200 OK".
A "HTTP/1.1 304 Not Modified" status does not have to send the content of the page, which reduces traffic.
- Parent task set to #63815
- TYPO3 Version changed from 6.2 to 7
In principle, this is a good idea - but it is a bad idea to bind this at SYS_LASTCHANGED since this value does not necessarily contain the needed information
for example, if the page contains a plugin which generates a "random" output, you can't send 304 by comparing with SYS_LASTCHANGED - and TYPO3 simply does not know if an INT-cObject has not changed since the last request.
The only soltion for that would be a really careful cache configuration (by the Developer using the right cObject and the Editor, by defining those values in the cache control settings) - but this is also not trivial, since taking a page from the TYPO3 cache does not necessarily mean, it has not been modified.
- Status changed from New to Closed
WIll it continue or will it stay closed ?
BTW, Sigfried is wrong : TYPO3 knows if there is INT objects, and no cache headers at all are sent in this case.
- Status changed from Closed to New
- Category set to Frontend
- Assignee set to Daniel Siepmann
- PHP Version deleted (
5.5)
@ Daniel Siepmann: You have assigned this issue to yourself, will you work on this?
- Assignee deleted (
Daniel Siepmann)
I planed, but never did. Freed up the assignment, thanks for questioning.
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