I have very simply situation, but I still can't make it works. My back-end controls more than one site and I need to make simple rewrite of /img/ folder to /img/subfolder/ for specific HTTP hosts.

So, from URL www.site1.com/img/logo.svg file will be in /img/logo.svg and from URL www.site2.com/img/logo.svg will be in /img/site2/logo.svg

I have this code in .htaccess, but it throws 500 error

RewriteCond %{HTTP_HOST} ^www.site2.com
RewriteRule ^img/(.*)$ img/site2/$1 [L]

What am I overlooking? Thank you!

CodePudding user response：

RewriteCond %{HTTP_HOST} ^www.site2.com
RewriteRule ^img/(.*)$ img/site2/$1 [L]

This will throw a 500 error because the RewriteRule pattern also matches the target URL, which will result in an endless rewrite loop. You need to exclude requests that have already been rewritten to img/site2/, or perhaps just match img/<file>, instead of img/<anything>.

For example, try the following instead:

RewriteCond %{HTTP_HOST} ^www\.(site2)\.com
RewriteRule ^img/([^/] \.\w{2,4})$ img/%1/$1 [L]

This matches /img/logo.svg, but not /img/site2/logo.svg.

The %1 backreference contains the domain name (ie. "site2") captured from the preceding CondPattern. This simple saves repetition.