mod_rewrite overriding second RewriteRule - php

Question

I'm running in to a mod_rewrite issue where the second rule in my .htaccess file is overriding the first. The .htaccess file in question looks like the one below:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /path/appname
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule /api/v1/(.*)$ api/v1/index.php?rquest=$1 [QSA,NC,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . index.php
</IfModule>
The issue that I'm seeing is this:
If I go directly to http://example.com/path/appname/api/v1/valid/endpoint the first RewriteRule triggers correctly and I get the result back from the API.
However, say I visit http://example.com/path/appname/app - a page which has been rewritten according to the second RewriteRule. This page makes AJAX requests to the api/v1 page. Those requests are instead directed through the second RewriteRule and send to my base index.php page.
I'm confused on how this could be, as my understanding is that the [L] flag prevents any further rules from being run once it matches and thus once any request that has 'api/v1' in it should catch that and stop checking for any further matches. What do I need to change in order for this to work correctly?
Thanks!

Answer 1

You should exclude the segment path for the previous rule-set, so it is not processed again. Like this:
# Don't redirect/map when folders or files exist
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
# Exclude the previous path
RewriteCond %{REQUEST_URI} !api/v1/? [NC]
# Prevent loops
RewriteCond %{REQUEST_URI} !index\.php [NC]
RewriteRule . index.php [L]
</IfModule>
Replace the last 4 lines in you question with the above lines.