QUIC: failed to get $http_host variable for http3 request

[zhuizhuhaomeng@…]

the log config

log_format  main  '$http_host';
access_log  logs/access.log  main;

the request cmd

curl -v -i -sS --http3 -X GET -H 'host: localhost' --connect-timeout 3 --max-time 3 https://127.0.0.1:4443/

the result

[ljl@localhost nginx]$ cat logs/access.log 
-

[zhuizhuhaomeng@…]

choose the wrong nginx version, but can not change now

[Sergey Kandaurov]

Curl translates -H 'host: localhost' into the ':authority' pseudo-header.
In contrary, $http_host contains the "Host" request header field, which isn't seemingly sent by Curl (but it could).
If you still need something that contains the authority component, use $host.

If you need further help with configuring nginx, consider using ​support options available.

[Maxim Dounin]

See also #2468.

[Sergey Kandaurov]

See also #2483.

[Maxim Dounin]

See also #2551.

[Maxim Dounin]

See also #2573.

[Konstantin]

Hello.
nginx/1.26.1, the problem is still relevant.
If we use HTTP3, then the $http_host variable becomes empty.

$ nginx -V
nginx version: nginx/1.26.1
built by gcc 12.2.0 (Debian 12.2.0-14) 
built with OpenSSL 3.0.11 19 Sep 2023
TLS SNI support enabled
configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib/nginx/modules --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --pid-path=/var/run/nginx.pid --lock-path=/var/run/nginx.lock --http-client-body-temp-path=/var/cache/nginx/client_temp --http-proxy-temp-path=/var/cache/nginx/proxy_temp --http-fastcgi-temp-path=/var/cache/nginx/fastcgi_temp --http-uwsgi-temp-path=/var/cache/nginx/uwsgi_temp --http-scgi-temp-path=/var/cache/nginx/scgi_temp --user=nginx --group=nginx --with-compat --with-file-aio --with-threads --with-http_addition_module --with-http_auth_request_module --with-http_dav_module --with-http_flv_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_mp4_module --with-http_random_index_module --with-http_realip_module --with-http_secure_link_module --with-http_slice_module --with-http_ssl_module --with-http_stub_status_module --with-http_sub_module --with-http_v2_module --with-http_v3_module --with-mail --with-mail_ssl_module --with-stream --with-stream_realip_module --with-stream_ssl_module --with-stream_ssl_preread_module --with-cc-opt='-g -O2 -ffile-prefix-map=/data/builder/debuild/nginx-1.26.1/debian/debuild-base/nginx-1.26.1=. -fstack-protector-strong -Wformat -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fPIC' --with-ld-opt='-Wl,-z,relro -Wl,-z,now -Wl,--as-needed -pie'

$ uname -a
Linux sitedd 6.1.0-21-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.90-1 (2024-05-03) x86_64 GNU/Linux