id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
2407	server_name using regex loses variable after first request in h3	Paul Scholz	Sergey Kandaurov	"Nginx with h3 leaves variables generated by server_name regex empty.
I defined a variable called subdomain in the server_name to redirect based on it. While using it with h2 it works well. But when switching to h3 the regex variables are not set. 

I tried this using

{{{
curl --http2 https://test.repo.limine.de/index.html
}}}

and 

{{{
# alt-svc cache required
curl --http3 https://test.repo.limine.de/index.html
}}}

Proxied server shows empty subdomain variable using h3.

Setup is described below:

Config:
{{{
server {

    listen 443 http3;
    listen 443 ssl http2;

    # regex in server_name combined with h3 does not work well
    server_name ~^(?<subdomain>.*)\.repo\.limine\.de$;

    ssl_certificate         /etc/acme/limine.de/fullchain.pem;
    ssl_certificate_key     /etc/acme/limine.de/privkey.pem;
    ssl_trusted_certificate /etc/acme/limine.de/cert.pem;

    add_header alt-svc 'h3="":443""; ma=86400';
    add_header Strict-Transport-Security max-age=15768000;

    location ~ ^/(.*)$ {
        proxy_pass http://localhost:8080/$subdomain/$1;
    }

}

}}}

{{{
Serving HTTP on 0.0.0.0 port 8080 (http://0.0.0.0:8080/) ...
10.89.0.63 - - [08/Nov/2022 12:11:42] code 404, message File not found
10.89.0.63 - - [08/Nov/2022 12:11:42] ""GET //index.html HTTP/1.0"" 404 - h3
10.89.0.63 - - [08/Nov/2022 12:12:12] ""GET /test/index.html HTTP/1.0"" 200 - h2

}}}

"	defect	closed	minor	nginx-1.23	http/3	1.23.x	fixed			Linux 9d941f5cbfb3 5.15.0-52-generic #58-Ubuntu SMP Thu Oct 13 08:03:55 UTC 2022 x86_64 Linux	"nginx version: nginx/1.23.2 (quic-3be953161026-boringssl-8ce0e1c14e48109773f1e94e5f8b020aa1e24dc5)
built by gcc 11.2.1 20220219 (Alpine 11.2.1_git20220219)
built with OpenSSL 1.1.1 (compatible; BoringSSL) (running with BoringSSL)
TLS SNI support enabled
configure arguments: --build=quic-3be953161026-boringssl-8ce0e1c14e48109773f1e94e5f8b020aa1e24dc5 --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-http_ssl_module --with-http_realip_module --with-http_addition_module --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_random_index_module --with-http_secure_link_module --with-http_stub_status_module --with-http_auth_request_module --with-http_xslt_module=dynamic --with-http_image_filter_module=dynamic --with-http_geoip_module=dynamic --with-http_perl_module=dynamic --with-threads --with-stream --with-stream_ssl_module --with-stream_ssl_preread_module --with-stream_realip_module --with-stream_geoip_module=dynamic --with-http_slice_module --with-mail --with-mail_ssl_module --with-compat --with-file-aio --with-http_v2_module --with-http_v3_module --add-module=/usr/src/ngx_brotli --add-module=/usr/src/headers-more-nginx-module-0.34 --add-module=/usr/src/njs/nginx --add-dynamic-module=/usr/src/ngx_http_geoip2_module --with-cc-opt=-I../boringssl/include --with-ld-opt='-L../boringssl/build/ssl -L../boringssl/build/crypto'"