htaccess for dynamic username

Hi i'm using this code for my subdirectories redirect for usernames

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*)$ profile.php?username=$1&%{QUERY_STRING}

I have this problem that is user enter domain.com/username/ it will have problems, it only works if they enter domain.com/username

Any solutions to this??

Also, example if i have a real directory call /images/, when they enter domain.com/images. there开发者_StackOverflow中文版 will be an error regarding some looping problem. what is the way to solve this issue?

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It's better to make your rewrites require the trailing slash.

then you can redirect non-slash ended urls to slash ended one,

using something like this :

RewriteCond %{REQUEST_URI} !(.*)/$
RewriteRule ^(.*)$ http://domain.com/$1/ [L,R=301]

I hope this helps.