htaccess的重写规则 - 检查引荐，如果错了引荐发送到特定的URL，如果正确，允许目录读取
我有我的网站上（domain.com/protect）我想限制只有一个引用（otherdomain.com/subfolder）的文件夹。
I have a folder on my site (domain.com/protect) I want to limit to only one referrer (otherdomain.com/subfolder).
拒绝了所有其他人，只允许当从URL来了。
Deny for all others, allow only if coming from that URL.
如果没有从该URL来了，然后重定向访问者交给otherdomain.com/login~~V代替。
If not coming from that URL, then redirect the visitor over to otherdomain.com/login instead.
我怎么会写出来在.htaccess重写规则？
How would I write that out in .htaccess rewrite rules?
在htaccess文件在你的 /保护目录中，添加下列规则：
In the htaccess file in your /protect directory, add these rules:
RewriteEngine On
RewriteCond %{HTTP_REFERER} !otherdomain\.com/subfolder
RewriteRule ^ - [L,F]
该条件检查的引用者不包含： otherdomain.com/subfolder ，如果没有，那么无论该请求是（在 /保护目录）将导致403禁止。
The condition checks that the referer doesn't contain: otherdomain.com/subfolder, and if it doesn't, then whatever the request is (inside the /protect directory) will result in a 403 Forbidden.
另外，你可以把这些规则在htaccess的文件在你的文档根目录，如果你宁愿把一切都在一次地方：
Alternatively, you can put these rules in the htaccess file in your document root if you would rather keep everything in once place:
RewriteEngine On
RewriteCond %{HTTP_REFERER} !otherdomain\.com/subfolder
RewriteRule ^/?protect/? - [L,F]