Fix/clean path

[nibra]

Feature - check path length

Related to joomla/joomla-cms#32567

[GeraintEdwards]

@nibra

With respect to my issue #51 - all the valid paths listed in my issue pass through cleanly with this new code. So this code works better than the current code in my view.

BUT note that double dotted folders such as

/var/www/vhosts/mainsite/../../another.website.net/something

still pass through unaffected - not sure what the intention is with the filtering as I've not seen the security bulletin

[nibra]

BUT note that double dotted folders such as

/var/www/vhosts/mainsite/../../another.website.net/something

still pass through unaffected - not sure what the intention is with the filtering as I've not seen the security bulletin

That is intended. A filter should not interpret the content, in this case resolve paths. That is up to the filesystem package.