Problem detecting empty REQUEST_URI with Apache mod_rewrite

Question

I am running Apache witha redirect rule like this:

RewriteCond %{HTTP_HOST} ^1st-domain\\.com
RewriteRule ^(.*)$ http://2nd-domain.com$1 [R=permanent,L]


        

Answer 1

This should work:

RewriteCond %{HTTP_HOST} ^1st-domain\.com
RewriteRule ^$ http://3rd-domain.com [R=permanent,L]

RewriteCond %{HTTP_HOST} ^1st-domain\.com
RewriteRule ^(.+)$ http://2nd-domain.com/$1 [R=permanent,L]

Hope it helps!

Note: REQUEST_URI is slightly different between httpd.conf and .htaccess, it starts with an extra backslash in httpd.conf. This means that in httpd.conf the first rewrite rule should be ^\/$, not just ^$.

Answer 2

On multisites such redirection works for me for empty requests :

RewriteCond %{HTTP_HOST} ^1st-domain\.com$
RewriteCond %{REQUEST_URI} "^/$"
RewriteRule ^$ http://3rd-domain.com/ [R=permanent,L]