[TYPO3-core] RFC #5500: Feature: Load Inline Elements On Demand

[Lars Houmark]

> Using the mtime ist pretty smart, because it will lead to an automated
> update. I don't see a usecase where you don't want to inform the browser
> about the new files whenever they have change.
> 
> I your link, the version number is increase manually, in Lars suggestion,
> it is automated, because it relies on the last "modified time". This will
> create unique versions too.
> Of course this would slow down down rendering a little, maybe this could
> be configurable (relay on debug flag?).

A combination of a far-future header for CSS and JS files with this 
approach is a very safe way of having caching done when liked, and 
client update of the files when needed.

Even though there has been discussions around the net on the 
stylesheet.css?mtime-timestamp approach for caching, I personally 
believe this is allowing caching in all major browsers. I have also 
done testing in major browsers some time ago, when we implemented this 
method in a backend system (not TYPO3) where this method is running 
just nice since then. No clients with broken features because of the 
lack of cache clearing.

Some means the W3C standard is not allowing caching of these filetypes 
with a parameter, but the solution for this could be a simple .htaccess 
regex with the timestamp as a part of the filename, like 
stylesheet.1269441180.css but the file will still be named 
stylesheet.css and requested as such. This way is 100% safe and working 
according to W3C standards, but it requires the use of .htaccess which 
should be no problem for TYPO3 though.

I know, this discussion should go to the dev list, so if others feel it 
is time for having this method implemented for the backend in order to 
ensure correct caching and correct client updating of CSS and JS files, 
I will start a new thread there to get an agreement of the solution we 
should go with and also try to achieve a RFC for this list later on.

Sorry for hijacking this one, as a compensation I will do testing and 
give feedback later today ;)

-- 
Lars Houmark