nginx防盗链的三种方式

1.

location ~* \.(gif|jpg|png|swf|flv)$ {
   valid_referers none blocked www.u77.com *.u77.com http://localhost;
      if ($invalid_referer) {
               rewrite ^/ http://www.u77.com/403.html;
               #return 404;

      }
 }