I've currently got the following in my .htaccess of my photo folder.
RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?siteabc.com [NC]
RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?sitexyz.com [NC]
RewriteRule \.(jpg|jpeg|png|gif)$ http://example.com/images/bandwidth.png [NC,R,L]
This blocks all not allowed domains from hotlinking our photo files and displays the http://example.com/images/bandwidth.png in it's place.
However, what I would like to do is to allow sites to be able to hotlinked our thumbnails. The thumbnail images have this sort of filename format
filenameabc_100_cw100_ch100_thumb.jpg
filenameabc_100_cw100_ch100_thumb.png
filenamexyz123_100_cw100_ch100_thumb.png
eg the filenames all end with _thumb.ext
So what I would like to do is to modify the above .htaccess to globally block all access with the exception of the filenames ending in thumb eg *_thumb.jpg or *_thumb.png
I don't have the first idea about how to write such a rule.
If anyone has any ideas I would be most grateful.
Modifying the rule-set in the question:
You may try this:
RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?siteabc.com [NC]
RewriteCond %{HTTP_REFERER} !^http(s)?://(www\.)?sitexyz.com [NC]
# Add this other exception
RewriteCond %{REQUEST_URI} !_thumb\. [NC]
RewriteRule \.(jpg|jpeg|png|gif)$ http://example.com/images/bandwidth.png [NC,R,L]