mod_filter issue

[xchs]

Should we consider adding a <IfModule !mod_filter.c> condition to our .htaccess.default to address "legacy" Apache versions, too?

The AddOutputFilterByType directive was moved into the mod_filter module for Apache ≥ 2.3.7. Before, this directive was available directly from the Apache core module. That said, if we have a server environment running e.g. Apache 2.2.x and no mod_filter.c available (or enabled), the entire condition is skipped and thus no AddOutputFilterByType directives are applied.

https://github.com/contao/core/blob/master/.htaccess.default#L72

http://uberspace.de/dokuwiki/webserver:htaccess#kompression
h5bp/html5-boilerplate#1173

http://httpd.apache.org/docs/2.0/mod/core.html#addoutputfilterbytype
http://httpd.apache.org/docs/2.4/mod/mod_filter.html#addoutputfilterbytype

[leofeyer]

As far as I remember (it is in the other ticket somewhere), the code we have now is compatible with all Apache versions, because some of the legacy things have not been removed although they were said to be. Do we need this change then?

[xchs]

some of the legacy things have not been removed although they were said to be

This could very well be true, however, for (legacy) server environments without the mod_filter module it might not work as expected, though. For instance, that seems to be the case on Uberspace.

[leofeyer]

So how should the whole code block look like then? Isn't <IfModule !mod_filter.c> to unspecific, because it evals to true on Apache < 2.3.7 as well as on Apache >= 2.3.7 but without mod_filter enabled?

[xchs]

That's true as well. Perhaps we should only provide a comment to explain the problem.

[leofeyer]

Right now we are pretty much using the HTML5Boilerplate solution and if they are happy with it, I am too :)