Opened 8 years ago
Closed 8 years ago
#1043 closed defect (duplicate)
URL encoded change regex match result
Reported by: | David Rousselie | Owned by: | |
---|---|---|---|
Priority: | minor | Milestone: | |
Component: | other | Version: | 1.10.x |
Keywords: | Cc: | ||
uname -a: | Linux cache01-devfe 3.13.0-40-generic #69-Ubuntu SMP Thu Nov 13 17:53:56 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux | ||
nginx -V: |
nginx version: nginx/1.10.0
built by gcc 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04) built with OpenSSL 1.0.2h 3 May 2016 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-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 --add-dynamic-module=debian/extra/njs-1c50334fbea6/nginx --with-threads --with-stream --with-stream_ssl_module --with-http_slice_module --with-mail --with-mail_ssl_module --with-file-aio --with-ipv6 --add-module=/tmp/ngx_http_enhanced_memcached_module --add-module=/tmp/headers-more-nginx-module --with-openssl=/openssl-1.0.2h --add-module=/tmp/lua-nginx-module --add-module=/tmp/ngx_devel_kit --add-module=/tmp/lua-upstream-nginx-module --with-http_v2_module --with-cc-opt='-g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security' --with-ld-opt='-Wl,-Bsymbolic-functions -Wl,-z,relro' |
Description
I am trying to ignore some URL parameters to compute a cache key with this kind of code:
set $cache_args $args; if ($cache_args ~ (.*)(?:&|^)utm_source=[^&]*(.*)) { set $cache_args $1$2; } if ($cache_args ~ (.*)(?:&|^)utm_content=[^&]*(.*)) { set $cache_args $1$2; } ...
It works until Nginx receive a request with URL encoded chars in its path.
For example, /%EE?utm_content=1&utm_source=2&arg1=3
:
- The first regex
(.*)(?:&|^)utm_source=[^&]*(.*)
will match but$2
will be%26arg1=3
whereas it is&arg1=3
when there is no chars URL encoded in the path.$cache_args
is then set toutm_content=1%26arg1=3
- Following regex
(.*)(?:&|^)utm_content=[^&]*(.*)
will then matchutm_content=[^&]*
as the whole valueutm_content=1%26arg1=3
instead of justutm_content=1
. Thus the new value set to$cache_args
will be empty instead of&arg1=3
.
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Duplicate of #348.