From 95425b271ad27470ea39d6c91ca4a614690ab12b Mon Sep 17 00:00:00 2001
From: Dmitry Volyntsev <xeioex@nginx.com>
Date: Thu, 22 Sep 2022 19:05:36 -0700
Subject: [PATCH] HTTP: adding a warning for ignored outgoing header
 assignments.

---
 nginx/ngx_http_js_module.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/nginx/ngx_http_js_module.c b/nginx/ngx_http_js_module.c
index da09d35f..7648a181 100644
--- a/nginx/ngx_http_js_module.c
+++ b/nginx/ngx_http_js_module.c
@@ -1565,6 +1565,11 @@ ngx_http_js_ext_header_out(njs_vm_t *vm, njs_object_prop_t *prop,
         return NJS_DECLINED;
     }
 
+    if (r->header_sent && setval != NULL) {
+        njs_vm_warn(vm, "ignored setting of response header \"%V\" because"
+                        " headers were already sent", &name);
+    }
+
     for (h = headers_out; h->name.length > 0; h++) {
         if (h->name.length == name.length
             && ngx_strncasecmp(h->name.start, name.start, name.length) == 0)
-- 
2.47.3