[nginx] Discard request body when redirecting to a URL via error_page.

[Ruslan Ermilov]

details:   https://hg.nginx.org/nginx/rev/d0d6cf5031a3
branches:  
changeset: 7607:d0d6cf5031a3
user:      Ruslan Ermilov <ru at nginx.com>
date:      Mon Dec 23 15:45:46 2019 +0300
description:
Discard request body when redirecting to a URL via error_page.

Reported by Bert JW Regeer and Francisco Oca Gonzalez.

diffstat:

 src/http/ngx_http_special_response.c |  6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diffs (16 lines):

diff -r db8df9cd84c8 -r d0d6cf5031a3 src/http/ngx_http_special_response.c
--- a/src/http/ngx_http_special_response.c	Mon Dec 16 15:19:01 2019 +0300
+++ b/src/http/ngx_http_special_response.c	Mon Dec 23 15:45:46 2019 +0300
@@ -623,6 +623,12 @@ ngx_http_send_error_page(ngx_http_reques
         return ngx_http_named_location(r, &uri);
     }
 
+    r->expect_tested = 1;
+
+    if (ngx_http_discard_request_body(r) != NGX_OK) {
+        r->keepalive = 0;
+    }
+
     location = ngx_list_push(&r->headers_out.headers);
 
     if (location == NULL) {