Cyclic redirection in .htaccess

Question

I have the following .htaccess file:

AddDefaultCharset utf-8
RewriteEngine on
Options +SymLinksIfOwnerMatch
RewriteBase /

# redirect all www-requests to no-www
# -
RewriteCond %{HTTP_HOST} ^www\.site\.com$ [NC]
RewriteRule ^(.*)$ http://site.com/$1 [R=301,L]

# redirect all home pages to / (root)
# -
RewriteCond %{THE_REQUEST} ^.*/index\.(php|html?)
RewriteRule ^(.*)index\.(php|html?)$ /$1 [R=301,L] 

# remove trailing slash from dirs
# -
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*)/$ /$1 [R=301,L]

# automatically add index.php when needed
# -
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond $1 !^(index\.php|login\.php|reg\.php|robots\.txt|css/|js/)
RewriteRule ^(.*)$ /index.php [L]

The .htaccess file should do the following (for SEO):

1. Conversion to no-www (http://www.site.com should become http://site.com)
2. All URIs with trailing slashes should convert to no-trailing-slash: http://site.com/me/ should be redirected http://site.com/me
3. All URIs with index.php/index.html should convert to just nothing: http://site.com/admin/index.php or http://site.com/admin/ should be eventually displayed as http://site.com

However the current version of .htaccess results in a cyclic redirection when trying to access (http://site.com/admin). The real document that should be fetched by browser is http://site.com/admin/index.php.

Can anyone please help me with this issue?

Answer 1

There's a module called mod_dir that's automatically loaded and it causes requests for directories that are missing the trailing slash to get redirected with a trailing slash. You can turn this off using the DirectorySlash directive, but note the security warning when you turn it off. There's an information disclosure security issue if you turn it off and default indexes won't get loaded. However, your lats rule (looks like) it does that, though incorrectly.

First, turn off the DirectorySlash

DirectorySlash Off

Then you need to change the last rule to:

RewriteCond %{REQUEST_FILENAME} -d
RewriteCond %{REQUEST_FILENAME}/index.php -f
RewriteRule ^(.*)$ /$1/index.php [L]