图片作为重要的耗流量大的静态资源, 可能网站主并不希望其他网站直接引用, Nginx 可以通过 referer 来防止外站盗链图片.
server { listen 80; server_name demo.neoease.com; index index.html index.htm index.php; root /var/www/demo_neoease_com; # 这里为图片添加为期 1 年的过期时间, 并且禁止 Google, 百度和本站之外的网站引用图片 location ~ .*\.(ico|jpg|jpeg|png|gif)$ { expires 1y; valid_referers none blocked demo.neoease.com *.google.com *.baidu.com; if ($invalid_referer) { return 404; } } log_format demo.neoease.com '$remote_addr - $remote_user [$time_local] $request' '$status $body_bytes_sent $http_referer ' '$http_user_agent $http_x_forwarded_for'; access_log /var/log/demo.neoease.com.log demo.neoease.com; }