nginx添加静态资源防盗链

添加valid_referers

示例：

location /static {
 valid_referers  *.domain.com;
      if ($invalid_referer) {
        return   403;
      }
      alias  /static/;
}

如果需要返回默认图片，设置rewrite即可

 if ($invalid_referer) {
    rewrite /^  /static/images/1.jpg break;
 }