.htaccess remove duplicate slashes and add a slash at the end of the URL

There are .htaccess as follows:

DirectoryIndex index.php Options FollowSymLinks RewriteEngine On RewriteRule ^(.*/)?\.svn/ - [F,L] RewriteCond %{HTTP_HOST} ^mySite\.com$ [OR] RewriteCond %{HTTP_HOST} ^myCite\.com$ RewriteRule ^(.*)$ http://www.mySite.com/$1 [R=301,L] RewriteCond %{HTTP_HOST} www.(.*?).mySite\.com$ RewriteRule ^(.*)$ http://%1.mySite.com/$1 [R=301,L,NC,QSA] RewriteCond %{REQUEST_FILENAME} !-s RewriteRule !(.*).(txt|css|jpg|gif|png|ico|js|htc)$ /index.php [L] Header set Cache-Control "max-age=29030400, public" ErrorDocument 404 http://www.mySite.com/404.html 

Task:

1. Remove all repeated slashes;
2. 301 redirect from pages without a slash to a slash.

those. Addresses: www.mySite.com//category/ , www.mySite.com//category , www.mySite.com/category 301 redirect to www.mySite.com/category/

But, there is one BUT - we do not process AJAX requests.

I tried the following lines, inserted between 4 and 6 lines:

 # Check whether the repeated slashes (//) more than two times. RewriteCond %{THE_REQUEST} // RewriteRule .* /$0 [R=301,L] # Add trailing slash RewriteCond %{HTTP:X-Requested-With} !=XMLHttpRequest RewriteCond %{REQUEST_URI} !(/$|\.) RewriteRule (.*) %{REQUEST_URI}/ [R=301,L] 

But, there are a lot of redirections and with a large attendance the server "falls".

How can you handle this with one rule or is it better to do it in PHP code?

PS: offer a solution to the problem, not questions: "How did it happen?"