[PATCH] Upstream: fix $upstream_status variable

[Piotr Sikora]

# HG changeset patch
# User Piotr Sikora <piotr at cloudflare.com>
# Date 1392184482 28800
#      Tue Feb 11 21:54:42 2014 -0800
# Node ID 3f21f5b57864af853ad097a113e419086a603aae
# Parent  cff36d2d7fe6db1baa9d44ed30ebd26b20c05d06
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 at cloudflare.com>

diff -r cff36d2d7fe6 -r 3f21f5b57864 src/http/modules/ngx_http_fastcgi_module.c
--- a/src/http/modules/ngx_http_fastcgi_module.c	Tue Feb 11 20:54:16 2014 +0800
+++ b/src/http/modules/ngx_http_fastcgi_module.c	Tue Feb 11 21:54:42 2014 -0800
@@ -1584,7 +1584,7 @@ ngx_http_fastcgi_process_header(ngx_http
                     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;
                 }
 
diff -r cff36d2d7fe6 -r 3f21f5b57864 src/http/modules/ngx_http_proxy_module.c
--- a/src/http/modules/ngx_http_proxy_module.c	Tue Feb 11 20:54:16 2014 +0800
+++ b/src/http/modules/ngx_http_proxy_module.c	Tue Feb 11 21:54:42 2014 -0800
@@ -1362,7 +1362,7 @@ ngx_http_proxy_process_status_line(ngx_h
         return NGX_OK;
     }
 
-    if (u->state) {
+    if (u->state && u->state->status == 0) {
         u->state->status = ctx->status.code;
     }
 
diff -r cff36d2d7fe6 -r 3f21f5b57864 src/http/modules/ngx_http_scgi_module.c
--- a/src/http/modules/ngx_http_scgi_module.c	Tue Feb 11 20:54:16 2014 +0800
+++ b/src/http/modules/ngx_http_scgi_module.c	Tue Feb 11 21:54:42 2014 -0800
@@ -885,7 +885,7 @@ ngx_http_scgi_process_status_line(ngx_ht
         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_re
                 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;
             }
 
diff -r cff36d2d7fe6 -r 3f21f5b57864 src/http/modules/ngx_http_uwsgi_module.c
--- a/src/http/modules/ngx_http_uwsgi_module.c	Tue Feb 11 20:54:16 2014 +0800
+++ b/src/http/modules/ngx_http_uwsgi_module.c	Tue Feb 11 21:54:42 2014 -0800
@@ -1017,7 +1017,7 @@ ngx_http_uwsgi_process_status_line(ngx_h
         return ngx_http_uwsgi_process_header(r);
     }
 
-    if (u->state) {
+    if (u->state && u->state->status == 0) {
         u->state->status = status->code;
     }
 
@@ -1145,7 +1145,7 @@ ngx_http_uwsgi_process_header(ngx_http_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;
             }