gistfile1.txt

# If cached file exists, serve it and stop processing
RewriteCond %{DOCUMENT_ROOT}/cache/%{HTTP_HOST}%{REQUEST_FILENAME} -f
RewriteRule ^(.*)$ /cache/%{HTTP_HOST}$1 [L]

# other redirection (imgs, js, css, ...) 
RewriteCond %{REQUEST_FILENAME} !-f 
RewriteCond %{REQUEST_URI} !.*/mephisto/.* 
RewriteCond %{REQUEST_URI} !.*html 
RewriteCond %{REQUEST_URI} !^/cache
RewriteCond %{DOCUMENT_ROOT}/cache/%{HTTP_HOST}/$1 -f
RewriteRule ^/(.*)$ /cache/%{HTTP_HOST}/$1 [QSA,L]