# HG changeset patch
# User Maxim Dounin <mdounin@mdounin.ru>
# Date 1418138515 -10800
# Node ID 5b9f711dc819466a023c2f7e849569987474e8d7
# Parent  2d39085161018ca7d7608589737d8d8a9a20c74d
Upstream: inheritance of proxy_pass and friends (ticket #645).

Instead of independant inheritance of conf->upstream.upstream (proxy_pass
without variables) and conf->proxy_lengths (proxy_pass with variables)
we now test them both and inherit only if neither is set.  Additionally,
SSL context is also inherited only in this case now.

Based on the patch by Alexey Radkov.

diff --git a/src/http/modules/ngx_http_fastcgi_module.c b/src/http/modules/ngx_http_fastcgi_module.c
--- a/src/http/modules/ngx_http_fastcgi_module.c
+++ b/src/http/modules/ngx_http_fastcgi_module.c
@@ -2697,11 +2697,8 @@ ngx_http_fastcgi_merge_loc_conf(ngx_conf
         return NGX_CONF_ERROR;
     }
 
-    if (conf->upstream.upstream == NULL) {
+    if (conf->upstream.upstream == NULL && conf->fastcgi_lengths == NULL) {
         conf->upstream.upstream = prev->upstream.upstream;
-    }
-
-    if (conf->fastcgi_lengths == NULL) {
         conf->fastcgi_lengths = prev->fastcgi_lengths;
         conf->fastcgi_values = prev->fastcgi_values;
     }
diff --git a/src/http/modules/ngx_http_proxy_module.c b/src/http/modules/ngx_http_proxy_module.c
--- a/src/http/modules/ngx_http_proxy_module.c
+++ b/src/http/modules/ngx_http_proxy_module.c
@@ -2968,12 +2968,6 @@ ngx_http_proxy_merge_loc_conf(ngx_conf_t
 
     ngx_conf_merge_ptr_value(conf->cookie_paths, prev->cookie_paths, NULL);
 
-#if (NGX_HTTP_SSL)
-    if (conf->upstream.ssl == NULL) {
-        conf->upstream.ssl = prev->upstream.ssl;
-    }
-#endif
-
     ngx_conf_merge_uint_value(conf->http_version, prev->http_version,
                               NGX_HTTP_VERSION_10);
 
@@ -2997,14 +2991,16 @@ ngx_http_proxy_merge_loc_conf(ngx_conf_t
         return NGX_CONF_ERROR;
     }
 
-    if (conf->upstream.upstream == NULL) {
+    if (conf->upstream.upstream == NULL && conf->proxy_lengths == NULL) {
         conf->upstream.upstream = prev->upstream.upstream;
         conf->vars = prev->vars;
-    }
-
-    if (conf->proxy_lengths == NULL) {
+
         conf->proxy_lengths = prev->proxy_lengths;
         conf->proxy_values = prev->proxy_values;
+
+#if (NGX_HTTP_SSL)
+        conf->upstream.ssl = prev->upstream.ssl;
+#endif
     }
 
     if (conf->upstream.upstream || conf->proxy_lengths) {
diff --git a/src/http/modules/ngx_http_scgi_module.c b/src/http/modules/ngx_http_scgi_module.c
--- a/src/http/modules/ngx_http_scgi_module.c
+++ b/src/http/modules/ngx_http_scgi_module.c
@@ -1443,11 +1443,8 @@ ngx_http_scgi_merge_loc_conf(ngx_conf_t 
         return NGX_CONF_ERROR;
     }
 
-    if (conf->upstream.upstream == NULL) {
+    if (conf->upstream.upstream == NULL && conf->scgi_lengths == NULL) {
         conf->upstream.upstream = prev->upstream.upstream;
-    }
-
-    if (conf->scgi_lengths == NULL) {
         conf->scgi_lengths = prev->scgi_lengths;
         conf->scgi_values = prev->scgi_values;
     }
diff --git a/src/http/modules/ngx_http_uwsgi_module.c b/src/http/modules/ngx_http_uwsgi_module.c
--- a/src/http/modules/ngx_http_uwsgi_module.c
+++ b/src/http/modules/ngx_http_uwsgi_module.c
@@ -1683,10 +1683,6 @@ ngx_http_uwsgi_merge_loc_conf(ngx_conf_t
         return NGX_CONF_ERROR;
     }
 
-    if (conf->upstream.ssl == NULL) {
-        conf->upstream.ssl = prev->upstream.ssl;
-    }
-
 #endif
 
     ngx_conf_merge_str_value(conf->uwsgi_string, prev->uwsgi_string, "");
@@ -1702,13 +1698,15 @@ ngx_http_uwsgi_merge_loc_conf(ngx_conf_t
         return NGX_CONF_ERROR;
     }
 
-    if (conf->upstream.upstream == NULL) {
+    if (conf->upstream.upstream == NULL && conf->uwsgi_lengths == NULL) {
         conf->upstream.upstream = prev->upstream.upstream;
-    }
-
-    if (conf->uwsgi_lengths == NULL) {
+
         conf->uwsgi_lengths = prev->uwsgi_lengths;
         conf->uwsgi_values = prev->uwsgi_values;
+
+#if (NGX_HTTP_SSL)
+        conf->upstream.ssl = prev->upstream.ssl;
+#endif
     }
 
     if (conf->upstream.upstream || conf->uwsgi_lengths) {