3 files changed, 42 insertions, 29 deletions

diff --git a/src/http/modules/proxy/ngx_http_proxy_handler.c b/src/http/modules/proxy/ngx_http_proxy_handler.c
index a195b45e4..d213d6929 100644
--- a/src/http/modules/proxy/ngx_http_proxy_handler.c
+++ b/src/http/modules/proxy/ngx_http_proxy_handler.c
@@ -1284,6 +1284,10 @@ static char *ngx_http_proxy_merge_loc_conf(ngx_conf_t *cf,
     ngx_conf_merge_value(conf->lm_factor, prev->lm_factor, 0);
     ngx_conf_merge_sec_value(conf->default_expires, prev->default_expires, 0);
 
+    if (conf->x_vars == NULL) {
+        conf->x_vars = prev->x_vars;
+    }
+
     return NULL;
 }
 
@@ -1389,10 +1393,10 @@ static char *ngx_http_proxy_set_x_var(ngx_conf_t *cf, ngx_command_t *cmd,
     ngx_http_variable_t        *var;
     ngx_http_core_main_conf_t  *cmcf;
 
-    if (lcf->x_vars.elts == NULL) {
-        if (ngx_array_init(&lcf->x_vars, cf->pool, 4,
-                           sizeof(ngx_http_variable_t *)) == NGX_ERROR)
-        {
+    if (lcf->x_vars == NULL) {
+        lcf->x_vars = ngx_array_create(cf->pool, 4,
+                                       sizeof(ngx_http_variable_t *));
+        if (lcf->x_vars == NULL) {
             return NGX_CONF_ERROR;
         }
     }
@@ -1405,7 +1409,7 @@ static char *ngx_http_proxy_set_x_var(ngx_conf_t *cf, ngx_command_t *cmd,
     for (i = 0; i < cmcf->variables.nelts; i++) {
         if (ngx_strcasecmp(var[i].name.data, value[1].data) == 0) {
 
-            if (!(index = ngx_array_push(&lcf->x_vars))) {
+            if (!(index = ngx_array_push(lcf->x_vars))) {
                 return NGX_CONF_ERROR;
             }
 
diff --git a/src/http/modules/proxy/ngx_http_proxy_handler.h b/src/http/modules/proxy/ngx_http_proxy_handler.h
index 28d7971df..f950258dc 100644
--- a/src/http/modules/proxy/ngx_http_proxy_handler.h
+++ b/src/http/modules/proxy/ngx_http_proxy_handler.h
@@ -87,7 +87,7 @@ typedef struct {
     ngx_path_t                      *cache_path;
     ngx_path_t                      *temp_path;
 
-    ngx_array_t                      x_vars;
+    ngx_array_t                     *x_vars;
 
     ngx_http_busy_lock_t            *busy_lock;
 
diff --git a/src/http/modules/proxy/ngx_http_proxy_upstream.c b/src/http/modules/proxy/ngx_http_proxy_upstream.c
index cf5195368..e2fe01554 100644
--- a/src/http/modules/proxy/ngx_http_proxy_upstream.c
+++ b/src/http/modules/proxy/ngx_http_proxy_upstream.c
@@ -100,6 +100,11 @@ static ngx_chain_t *ngx_http_proxy_create_request(ngx_http_proxy_ctx_t *p)
     r = p->request;
     uc = p->lcf->upstream;
 
+#if (NGX_SUPPRESS_WARN)
+    var = NULL;
+    index = NULL;
+#endif
+
     if (p->upstream->method) {
         len = http_methods[p->upstream->method - 1].len;
 
@@ -169,20 +174,22 @@ static ngx_chain_t *ngx_http_proxy_create_request(ngx_http_proxy_ctx_t *p)
     }
 
 
-    cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
+    if (p->lcf->x_vars) {
+        cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
 
-    var = cmcf->variables.elts;
-    index = p->lcf->x_vars.elts;
+        var = cmcf->variables.elts;
+        index = p->lcf->x_vars->elts;
 
-    for (i = 0; i < p->lcf->x_vars.nelts; i++) {
+        for (i = 0; i < p->lcf->x_vars->nelts; i++) {
 
-        if (!(value = ngx_http_get_variable(r, index[i]))) {
-            continue;
-        }
+            if (!(value = ngx_http_get_variable(r, index[i]))) {
+                continue;
+            }
 
-        if (value->text.len) {
-            len += sizeof("X-") - 1 + var[index[i]].name.len + sizeof(": ") - 1
-                + value->text.len + sizeof(CRLF) - 1;
+            if (value->text.len) {
+                len += sizeof("X-") - 1 + var[index[i]].name.len
+                    + sizeof(": ") - 1 + value->text.len + sizeof(CRLF) - 1;
+            }
         }
     }
 
@@ -356,26 +363,28 @@ static ngx_chain_t *ngx_http_proxy_create_request(ngx_http_proxy_ctx_t *p)
     }
 
 
-    for (i = 0; i < p->lcf->x_vars.nelts; i++) {
+    if (p->lcf->x_vars) {
+        for (i = 0; i < p->lcf->x_vars->nelts; i++) {
 
-        if (!(value = ngx_http_get_variable(r, index[i]))) {
-            continue;
-        }
+            if (!(value = ngx_http_get_variable(r, index[i]))) {
+                continue;
+            }
 
-        if (value->text.len == 0) {
-            continue;
-        }
+            if (value->text.len == 0) {
+                continue;
+            }
 
-        *b->last++ = 'X'; *b->last++ = '-';
+            *b->last++ = 'X'; *b->last++ = '-';
 
-        b->last = ngx_cpymem(b->last, var[index[i]].name.data,
-                             var[index[i]].name.len);
+            b->last = ngx_cpymem(b->last, var[index[i]].name.data,
+                                 var[index[i]].name.len);
 
-        *b->last++ = ':'; *b->last++ = ' ';
+            *b->last++ = ':'; *b->last++ = ' ';
 
-        b->last = ngx_cpymem(b->last, value->text.data, value->text.len);
+            b->last = ngx_cpymem(b->last, value->text.data, value->text.len);
 
-        *b->last++ = CR; *b->last++ = LF;
+            *b->last++ = CR; *b->last++ = LF;
+        }
     }