Question

I’m trying to parse hostname only from the Apache server variable HTTP_REFERER and I’m wondering if it’s possible with mod_rewrite since my goal is to obtain the hostname and then rewrite the request.

Answer 1

I figured it out

RewriteCond %{HTTP_REFERER} ^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))? [NC]
RewriteRule ^traveler.html$ http://something.com/viewer.html?embed_referer=%4 [QSA,L]

With the back-reference from RewriteCond, I can append the query string to the new path/URL.