htaccess redirection for double slashes

Question

I am having a problem with my site. Sometimes after the user log in is redirected to a page like this:

mydomain.com//somepage

Please notice the double slash in the URL, which takes to a not valid page so i want to modify my htaccess in order to make all pages with double slash to automatically redirect to an URL like this:

mydomain.com/folder/somepage

Please notice the word "folder" between slashes this time. An URL like this would always take to a valid page.

I made some rewrite rules for my htaccess but they dont work as expected:

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
RewriteCond %{THE_REQUEST} \ //([^\?\ ]*)
RewriteRule ^ /folder/%1 [L,R=301]
</IfModule>

Could you please give me a hint?

Thank you.

Answer 1

Try something like this:

RewriteEngine On
RewriteCond %{THE_REQUEST} \ //([^\?\ ]*)
RewriteRule ^ /folder/%1 [L,R=301]

You need to match against the %{THE_REQUEST} variable because the URI gets normalized before it gets matched against the pattern of rewrite rules.