URL Rewrite Including Trailing Slash If Not Present - .htaccess

Question

I've got this RewriteRule to work.
RewriteBase /my/path/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /my/path/index.php [L]
So URLs with a trailing slash work. http://localhost/my/path/foo/bar/
The problem is that URLs without the trailing slash will break relative links. Plus it dosen't look good.
This reaches the maximum number of internal redirects.
RewriteRule ^/my/path/(.*[^/])$ $1/ [R]
RewriteRule . /my/path/index.php [L]
And this will do... http://localhost/my/path/index.php/bar/
RewriteRule . /my/path/index.php
RewriteRule ^/my/path/(.*[^/])$ $1/ [R,L]
Any Ideas or solutions?

Answer 1

The confusing feature of mod_rewrite is that, after an internal redirect, even one qualified with [L], the entire set of rules is processed again from the beginning.
So you redirect a nonexistent path to index.php, but then the rules for adding a slash kick in and you don't get the result you want.
In your case you simply need to put the file nonexistence condition on both of the redirect rules:
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule [^/]$ %{REQUEST_URI}/ [L,R]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^ /my/path/index.php [L]
Or maybe move this condition to the top of the file:
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L] # redirect to same location to stop processing
RewriteRule [^/]$ %{REQUEST_URI}/ [L,R]
RewriteRule ^ /my/path/index.php [L]
There's also an undocumented trick to stop processing after an internal redirect which should make more complex rulesets easier to write – using the REDIRECT_STATUS environment variable, which is set after an internal redirect:
RewriteCond %{ENV:REDIRECT_STATUS} . # <-- that's a dot there
RewriteRule ^ - [L] # redirect to same location to stop processing
RewriteRule [^/]$ %{REQUEST_URI}/ [L,R]
RewriteRule ^ /my/path/index.php [L]