RewriteEngine On

<FilesMatch \.(json|svg)$>
	<IfModule mod_headers.c>
		Header set Access-Control-Allow-Origin "*"
		Header set Access-Control-Allow-Methods "POST, GET, OPTIONS"
	</IfModule>
</FilesMatch>

<FilesMatch \.json$>
	<IfModule mod_headers.c>
		Header set Cache-Control "no-cache, no-store, must-revalidate"
		Header set Pragma "no-cache"
		Header set Expires 0
	</IfModule>
</FilesMatch>

RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f

RewriteRule ^/?(.*) icon.php?icon=$1 [B]