This will rewrite http://xxx.com/porn to http://xxx.com/porn.html for added pleasure:
```bash
location / {
# break if URI has .html extension
if ($request_filename ~* ^.+.html$) {
break;
}
# add .html to URI and serve file, directory, or symlink if it exists
if (-e $request_filename.html) {
rewrite ^/(.*)$ /$1.html last;
break;
}
}
```
This URL will also work http://xxx.com/porn/