Hi. There are many code samples on the web for simple hotlinking.

I have some questions on how to do this in a better way, and all my trial code has not worked, so hope some Nginx guru here can help.

Here's what I am looking for:

1. Firstly, I would like the blocking to happen at a server-wide level. Nginx is on a dedicated server, and there are many "server" vhost tags in a folder. I prefer not to have to write the blocking code for every server individually. Is this possible at an "http" level? What's the code for that.

2. Secondly, I have about 35 domains and many subdomains. I don't want them to be in one long line. But all my "vhost" server tags are inside a directory. Can I somehow specify Nginx to allow all those domains whose server definitions are in a folder? (/etc/nginx/vhosts)

3. Will the "IF" condition slow down my Nginx? I remember reading that Nginx does not like IF conditions.

4. I want to allow some additional domains like Google and Facebook and Pinterest. What's a good way to include this in the allowable list.

5. Finally, if I do have to include this directive in each "server" block for each of my domains, can I at least bundle the commands for these type of files as such:

`------
location ~* \.(png|gif|jpg|jpeg|swf|ico|)$ {
expires 7d;
try_files $uri @backend;

valid_referers none blocked site.com mysite.com ~\.google\. ~\.yahoo\. ~\.bing\. ~\.facebook\. ~\.fbcdn\.;
if ($invalid_referer) {
return 403;
}

}
------`


Thanks!