id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
1995	Regular expression with Unicode property test doesn't match as expected	funkyfuture@…		"with this server configuration, whose regex pattern relies on Unicode properties (to match all characters that are classified as letter in every script):

{{{
server {
  listen 8000;
  server_name _;

  location / {
      return 404 ""Did not match.\n"";
  }

  location ~ ""^/\p{L}+$"" {
      return 200 ""Matched.\n"";
  }
}
}}}

i get the following responses:

{{{
+ curl http://localhost:8000/123
Did not match.
+ curl http://localhost:8000/test
Matched.
+ curl http://localhost:8000/täst
Did not match.
+ curl http://localhost:8000/спаси́бо
Did not match.
}}}

i would expect all of the last three requests to yield the ""Matched."" string though, because all given paths consist of letters only.

afaict, PCRE does support the Unicode properties based tests and the first two requests seem to confirm that. see also here: http://www.pcre.org/current/doc/html/pcre2syntax.html#SEC5

i'm of course not sure whether this is actually a defect, just docs that could be improved or me, as it involves regular expressions.

what baffles me is that at least the english parts of the web seem not yet to have discussed the use of regular expressions with Unicode properties in nginx.

i'd appreciate anyone who tested this on a different platform and shares her/his findings."	defect	closed	minor		nginx-core	1.19.x	invalid	regex unicode	funkyfuture@…	Linux 6f16b1a35cc8 5.4.0-33-generic #37-Ubuntu SMP Thu May 21 12:53:59 UTC 2020 x86_64 GNU/Linux	"nginx version: nginx/1.19.0
built by gcc 8.3.0 (Debian 8.3.0-6) 
built with OpenSSL 1.1.1d  10 Sep 2019
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-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 -fdebug-prefix-map=/data/builder/debuild/nginx-1.19.0/debian/debuild-base/nginx-1.19.0=. -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'"