Nginx - 我如何知道$ http_referer未设置或为空？

Question

我如何知道nginx变量$ http_referer何时未设置或为空？

我收到一些没有http referer的请求.在nginx日志中,$ http_referer显示如下:" - ".我想做的是"返回403;" 如果$ http_referer未设置或为空,如本例所示.

谢谢!

Answer 1

http://nginx.org/en/docs/http/ngx_http_referer_module.html#valid_referers

valid_referers server_names ~.;
if ($invalid_referer) {
    return   403;
}