How to rewrite to static file only if it exists (.htaccess)

I would like apache to render %{DOCUMENT_ROOT}/cache/%1.html

if %1 is the request path. My whole site is in a sub directory called cache_test and I have the following .htaccess file. But the RewriteRule on line 7 and 11 won't mat开发者_开发问答ch :(.

Thank you in advance for any advance! Kind regards, Nicklas

 1 RewriteEngine   On
 2 RewriteBase     /cache_test/
 3
 4 RewriteCond     %{THE_REQUEST} ^(GET|HEAD)
 5 RewriteCond     %{REQUEST_URI} ^/([^.]+)$
 6 RewriteCond     %{DOCUMENT_ROOT}/cache/%1.html -f
 7 RewriteRule     ^/[^.]+$ /cache/%1.html [QSA,L]
 8
 9 RewriteCond     %{THE_REQUEST} ^(GET|HEAD)
10 RewriteCond     %{DOCUMENT_ROOT}/cache/index.html -f
11 RewriteRule     ^/$ /cache/index.html [QSA,L]
12
13 RewriteRule     (.*/cache_test)$ $1/
14 RewriteRule     ^$ index.html [QSA]
15 RewriteRule     ^([^.]+)$ $1.html [QSA]
16 RewriteCond     %{REQUEST_FILENAME} !-f 
17 RewriteRule     ^(.*)$ dispatch.fcgi [QSA,L]

RewriteBase + DOCUMENT_ROOT ==> troubles...

I'm not in a position to test right now, you might want to check wether this works, change:

6 RewriteCond     %{DOCUMENT_ROOT}/cache/%1.html -f

To:

6 RewriteCond     ../cache/%1.html -f

And if not, I see no other option but to forget about the advantages of RewriteBase & drop that.

On a side note, why do you need this?

RewriteRule     ^$ index.html [QSA]