Opened 7 years ago
Closed 7 years ago
#1140 closed defect (invalid)
ssi module ignores "default" parameter of echo
| Reported by: | Owned by: | ||
|---|---|---|---|
| Priority: | minor | Milestone: | |
| Component: | other | Version: | 1.11.x |
| Keywords: | Cc: | ||
| uname -a: | Linux 4.7.0-1-amd64 #1 SMP Debian 4.7.8-1 (2016-10-19) x86_64 GNU/Linux | ||
| nginx -V: |
nginx version: nginx/1.10.1
built with OpenSSL 1.0.2i 22 Sep 2016 (running with OpenSSL 1.0.2j 26 Sep 2016) TLS SNI support enabled configure arguments: --with-cc-opt='-g -O2 -fdebug-prefix-map=/build/nginx-7jgWGO/nginx-1.10.1=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2' --with-ld-opt='-Wl,-z,relro -Wl,-z,now' --prefix=/usr/share/nginx --conf-path=/etc/nginx/nginx.conf --http-log-path=/var/log/nginx/access.log --error-log-path=/var/log/nginx/error.log --lock-path=/var/lock/nginx.lock --pid-path=/run/nginx.pid --modules-path=/usr/lib/nginx/modules --http-client-body-temp-path=/var/lib/nginx/body --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --http-proxy-temp-path=/var/lib/nginx/proxy --http-scgi-temp-path=/var/lib/nginx/scgi --http-uwsgi-temp-path=/var/lib/nginx/uwsgi --with-debug --with-pcre-jit --with-ipv6 --with-http_ssl_module --with-http_stub_status_module --with-http_realip_module --with-http_auth_request_module --with-http_v2_module --with-http_dav_module --with-http_slice_module --with-threads --with-http_addition_module --with-http_geoip_module=dynamic --with-http_gunzip_module --with-http_gzip_static_module --with-http_image_filter_module=dynamic --with-http_sub_module --with-http_xslt_module=dynamic --with-stream=dynamic --with-stream_ssl_module --with-mail=dynamic --with-mail_ssl_module --add-dynamic-module=/build/nginx-7jgWGO/nginx-1.10.1/debian/modules/nginx-auth-pam --add-module=/build/nginx-7jgWGO/nginx-1.10.1/debian/modules/nginx-dav-ext-module --add-dynamic-module=/build/nginx-7jgWGO/nginx-1.10.1/debian/modules/nginx-echo --add-dynamic-module=/build/nginx-7jgWGO/nginx-1.10.1/debian/modules/nginx-upstream-fair --add-dynamic-module=/build/nginx-7jgWGO/nginx-1.10.1/debian/modules/ngx_http_substitutions_filter_module |
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Description
When using
<!--# echo var="name" default="no" -->
the default is never considered.
The bug is in ngx_http_ssi_echo, where it returns with an error from the function when the variable is not found by ngx_http_get_variable. The default is never considered.
// ngx_http_ssi_filter_module.c:2264
if (value == NULL) {
vv = ngx_http_get_variable(r, var, key);
if (vv == NULL) {
return NGX_HTTP_SSI_ERROR;
}
if (!vv->not_found) {
text.data = vv->data;
text.len = vv->len;
value = &text;
}
}
Note:
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Works fine here:
location = / { ssi on; ssi_types *; return 200 '<!--#echo var="arg_foo" default="test" -->\n'; }Note that the check in question,
if (vv == NULL), is about checking for fatal errors like allocation failures. The default is used when the variable is not found, see theif (value == NULL) { value = params[NGX_HTTP_SSI_ECHO_DEFAULT];block below.