How to use mod_Rewrite to check multiple folders for a static file

apache, mod-rewrite

Solution

Try these rules:

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{DOCUMENT_ROOT}/library1%{REQUEST_URI} -f
RewriteRule ^css/.+ library1%{REQUEST_URI} [L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{DOCUMENT_ROOT}/library2%{REQUEST_URI} -f
RewriteRule ^css/.+ library2%{REQUEST_URI} [L]

Problem

What are the mod_Rewrite rules for checking multiple folder locations for a given file. For instance, if I have a folder structure of: ``` public/ css/ library1/ css/ library2/ css/ ``` and I want requests to `/css/somefile.css` to first check the `public/css/` directory, then cascade to `public/library1/css/` then `public/library2/css/`, returning a 404 if an asset cannot be found in any of the directories. I was thinking along the lines of: ``` RewriteCond %{SCRIPT_FILENAME} !-f RewriteCond library1%{REQUEST_URI} -f RewriteRule ^(.*)$ library1$1 [L] RewriteCond %{SCRIPT_FILENAME} !-f RewriteCond library2%{REQUEST_URI} -f RewriteRule ^(.*)$ library2$1 [L] ``` But this doesn't seem to work - I'm not sure how to check for file existence on a dynamically generated path.

Original source