Response Header IF statement problem

[webopsx]

You can use map for this...

 - http://nginx.org/en/docs/http/ngx_http_map_module.html#map

map $upstream_http_x_secured_page $nocache {
    "search string"		"1"
    default			"";
}

location /foo {
    ...
    proxy_no_cache $nocache;
}

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,278558,278563#msg-278563