Hi there, I'm trying (unsuccessfully) to read an upstream/sent response header and set an additional one based on some regex.
Let's say I want to check if the site served is WordPress. WordPress will usually output a link header like this: link: <https://www.domain.com/wp-json/>; rel="https://api.w.org/";, <https://www.domain.com/>; rel=shortlink So if I did this: [code] set $IS_WORDPRESS "false"; # Now lookup "wp-json" in the (response) link header if ($sent_http_link ~* "wp-json") { set $IS_WORDPRESS "true"; } add_header X-Sent-Header "$sent_http_link"; add_header X-Is-WordPress $IS_WORDPRESS; [/code] You'd probably expect to see 2 headers output here, but in reality you only get 1: x-is-wordpress: false x-sent-header is empty and is not output. Additionally, the regex does not match at all, that's why x-is-wordpress returns false. Now dig this. If I comment out the if block, the "$sent_http_link" value is output just fine x-sent-header: <https://www.domain.com/wp-json/>; rel="https://api.w.org/";, <https://www.domain.com/>; rel=shortlink x-is-wordpress: false It's as if the sent header is nulled if I just call it! Is this expected behaviour? Could there be another way to do this? The same happens if I use $upstream_http_X as this is a proxy setup (Nginx to Apache). Posted at Nginx Forum: https://forum.nginx.org/read.php?2,285363,285363#msg-285363 _______________________________________________ nginx mailing list nginx@nginx.org http://mailman.nginx.org/mailman/listinfo/nginx
