[nginx] Fixed $content_length cacheability with chunked (ticket #2252).

[Maxim Dounin]

details:   https://hg.nginx.org/nginx/rev/5354bf552520
branches:  stable-1.20
changeset: 7968:5354bf552520
user:      Maxim Dounin <mdounin at mdounin.ru>
date:      Wed Oct 06 18:01:42 2021 +0300
description:
Fixed $content_length cacheability with chunked (ticket #2252).

diffstat:

 src/http/ngx_http_variables.c |  4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diffs (14 lines):

diff -r 5de6a960632e -r 5354bf552520 src/http/ngx_http_variables.c
--- a/src/http/ngx_http_variables.c	Tue Aug 31 17:54:54 2021 +0300
+++ b/src/http/ngx_http_variables.c	Wed Oct 06 18:01:42 2021 +0300
@@ -1179,6 +1179,10 @@ ngx_http_variable_content_length(ngx_htt
         v->no_cacheable = 0;
         v->not_found = 0;
 
+    } else if (r->headers_in.chunked) {
+        v->not_found = 1;
+        v->no_cacheable = 1;
+
     } else {
         v->not_found = 1;
     }