rails caching with apache enable through rewrite rules

gistfile1.txt

I generate all my page caching in public/cache directory.  The following apache rewrite rules check cache before hitting the rails app

<VirtualHost *:80>
RewriteEngine On

RewriteCond %{THE_REQUEST} ^(GET|HEAD)
RewriteCond %{REQUEST_URI} ^/([^.]+)$
RewriteCond %{DOCUMENT_ROOT}/cache/%1.html -f
RewriteRule ^/[^.]+$ /cache/%1.html [QSA,L]

RewriteCond %{THE_REQUEST} ^(GET|HEAD)
RewriteCond %{DOCUMENT_ROOT}/cache/index.html -f
RewriteRule ^/$ /cache/index.html [QSA,L]

 ServerName  myserver.com
 DocumentRoot /var/www/rails/myproject/current/public
 PassengerEnabled off
 ProxyPass / http://127.0.0.1:8080/
 ProxyPassReverse / http://127.0.0.1:8080/
</VirtualHost>