Upstream: fix $upstream_status variable.

Previously, upstream's status code was overwritten with
cached response's status code when STALE or REVALIDATED
response was sent to the client.

Signed-off-by: Piotr Sikora <piotr@cloudflare.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/http/modules/ngx_http_scgi_module.c b/src/http/modules/ngx_http_scgi_module.c
index 70f6ac1de..884cb500a 100644
--- a/src/http/modules/ngx_http_scgi_module.c
+++ b/src/http/modules/ngx_http_scgi_module.c
@@ -885,7 +885,7 @@ ngx_http_scgi_process_status_line(ngx_http_request_t *r)
         return ngx_http_scgi_process_header(r);
     }
 
-    if (u->state) {
+    if (u->state && u->state->status == 0) {
         u->state->status = status->code;
     }
 
@@ -1013,7 +1013,7 @@ ngx_http_scgi_process_header(ngx_http_request_t *r)
                 ngx_str_set(&u->headers_in.status_line, "200 OK");
             }
 
-            if (u->state) {
+            if (u->state && u->state->status == 0) {
                 u->state->status = u->headers_in.status_n;
             }